Ceph Osd Repair

The following branch will exist until this feature is merged, or something comparable is implemented. The default replication size for a Ceph pool created with ceph emperor or earlier releases is two. * injectargs "--mon_osd_full_ratio. Here are some common commands to troubleshoot a Ceph cluster: ceph status; ceph osd status; ceph osd df; ceph osd utilization; ceph osd pool stats; ceph osd tree; ceph pg stat; The first two status commands provide the overall cluster health. [Regression Potential] Minimal; already in later Ubuntu releases. I have some problems in a ceph cluster. Adding new OSD is not difficult task, and it can be done via ceph-deploy or by running ceph-disk. I tryed ceph pg repair command on this pg: $ ceph pg repair 4. 停止故障object所在的OSD; flush日志( ceph-osd -i –flush-journal ) 将出故障的object移到别的地方; 重新启动OSD服务; 执行命令 ceph pg repair 17. 22 legacy statfs reporting detected, suggest to run store repair to get. You can configure a Ceph Storage Cluster on non-identical hardware from different manufacturers. Like this: Like Loading Like. For example, the omap of a Ceph (hammer, jewel) OSD is generally stored in /var/lib/ceph/osd/ceph-$ID/current/omap. Set the number of placement groups. 10: ceph version 14. For example, lets run a repair on PG 57. MonCommandApi is a class that provides access to the whole Ceph command line API in a type save way. We will use three Ubuntu 16. 20 to repair [[email protected] ~] ceph pg repair 2. After setting noscrub, ceph health becomes WARN state as below: #ceph health HEALTH_WARN nodeep-scrub flag (s) set. Ceph's monitoring and self-repair features minimize administration overhead. ceph df / ceph df detail - very nice overview, pools, sizes, objects etc. Otherwise, returns WARNING if the severity is HEALTH_WARN, else CRITICAL. Lu s New or Quiet Member. txt (text/plain — 87. Ceph Object Storage Device (OSD): As soon as your application issues a writes operation to the Ceph cluster, data gets stored in the OSD in the form of objects. cm -o new_crush_map. When a scrub is performed on a placement group, the OSD attempts to choose an authoritative copy from among its replicas. container that has the full suite of Ceph clients for rook debugging and testing. To eliminate centralization, Ceph uses an algorithm called CRUSH. 解决方案:使用ceph pg repair工具进行数据修复,一般情况下都可以恢复正常,如果无法恢复. ceph FS maturing, features converging : No interaction with dm-crypt and ceph OSD management in nominal operation, isolated drive failure Recommend moving journals to NVMe Intel P3700-class flash for performance and flash endurance reasons in the first year of operation. My cluster was throwing warning Legacy BlueStore stats reporting detected and we could just not abide that. re-add ceph-osd charm to the unit and hope to pick up the disks and rejoin the cluster. In the case of the clay plugin configured with k=8, m=4 and d=11 when a single OSD fails, d=11 osds are contacted and 250MiB is downloaded from each of them, resulting in a total download of 11 X 250MiB = 2. It runs on commodity hardware-saving you costs, giving you flexibility and because it's in the Linux kernel. It provides a diverse set of commands that allows deployment of monitors, OSDs, placement groups, MDS and overall maintenance, administration of the cluster. Rebooting the Overcloud. Remove Ceph OSD via CLI. # ceph osd repair 246 instructed osd(s) 246 to repair It does not matter which osd or pg the repair is initiated on. b query command. Find the problem. GitHub Gist: instantly share code, notes, and snippets. 0 instructing pg 3. 知道 OSD 35 有问题,但我们现在还不知道对应的是具体哪块磁盘。我们可以登录到对应到 OSD 服务器上查看 OSD 35 的目录名称,并查看 PVS 的对应关系来. Ceph can provide fault tolerance and enhance I/O performance by replicating and striping data across the storage devices in a Storage Cluster. Shows you how can you monitor ceph monitors (mon) and ceph storage (osd) using ceph command line tools. In the case of the clay plugin configured with k=8. pg down 的意思是含有最新数据 pg 的对应的 osd 没起来,最简单的做法就是将该 osd 拉起来,但如果该 osd 实在拉不起来且已经把它移出集群了,则可以告诉集群那个主 pg 的 osd 已经丢失了,让其它副本的 pg 作为主 osd ,比如 osd. 4 $ sudo ceph osd rm 4 WTH, this made no difference. Node A: OSD1, OSD2; Node B: OSD3, OSD4. What is not entirely obvious is that a ceph pg repair operation is also a scrub op and lands in the same queue of the primary OSD. 22 legacy statfs reporting detected, suggest to run store repair to get. 5dcc and check the dump_scrubs output:. Preparing for replacement (GARR-specific section)¶. 3 is full at 97%. Configuring Ceph. If a ceph OSD loses its disk, and if the system's "auto repair" option similarly includes "osd", then whenever a new disk is added to the enclosure **in the same enclosure/slot as the failed OSD disk** that disk is automatically converted to a new global spare which is **dedicated to the repair of that specific OSD**, and the OSD will. conf [client. cc: 1662: FAILED ceph_assert(r == 0) 08/27/2020 02:03 PM: 47271: bluestore: Bug: New: Normal: ceph version 14. ceph osd crush remove osd. There are several improvements which need to be made. When BlueStore OSDs are used, space utilization is now broken down by object data, omap data, and internal metadata, by pool, and by pre- and post- compression sizes. # ceph osd unset noout; Switch any existing CRUSH buckets to the latest bucket type straw2. with ceph-deploy, just after the ceph-deploy osd activate phase and the distribution of keys, the One thing that is not mentioned in the quick-install documentation with ceph-deploy or the OSDs. 0 host=bj-yh-ceph-node2 j. # CEPH-deploy disk zap CEPH-node1:sdb CEPH-node1:sdc CEPH-node1:sdd. [[email protected] ~]# ceph pg repair 1. 2ee" (osd listed) and it seems to be taking care of it. List the disks on nodes by, # CEPH-deploy disk list CEPH-node1. 输入命令提示如下错误: [[email protected] ~]# rados -p testpool ls 2017-10-21 06:13:25. ceph osd pool set {name} noscrub 1 ceph osd pool set {name} nodeep-scrub 1. ceph-bluestore-tool工具的简介 [[email protected] /]# ceph-bluestore-tool --help All options: Options: -h [ --help ] produce help message --path arg bluestore path //osd的路径 --out-dir arg output directory //导出时候的目录,比如bluefs-export -l [ --log-file ] arg log file //log文件的位置,很多command就是调用bluestore. First thing to do is set the "Ceph osd set noout" to avoid repair while working on this. Rook also comes with a. Current scrub and repair is fairly primitive. Troubleshooting Node Registration; 11. yml and modify according to your. Its parameters include the pool name, PG, and number of PGPs: $ ceph osd pool create mytest 128 128 pool 'mytest' created. Subcommand blocked-by prints a histogram of which OSDs are blocking their peers. ceph-2:~ # cat /var/lib/ceph/osd/ceph-3/bluefs 1. Differences between Oracle versions of the software and upstream releases are limited to Oracle-specific fixes and patches for specific bugs. 10: ceph version 14. after a configuration change. 04 servers in this setup. How to use and operate Ceph-based services at CERN. keyring Step2 : 編輯 /etc/ceph/ceph. It appears after doing a purge or removing ceph ceph-mon ceph-osd one of the shared libraries phyiscally goes bye bye however the environment still thinks the library is present. 4 $ sudo ceph auth del osd. repair_copy is quite the same as the copy_from op, the only difference is * repair_copy copies from the specified OSD while copy_from copies from the primary OSD * for repair_copy, the dest and src object is the same. Rebooting the Overcloud. bench* -> Benchmark an OSD by default, the test writes 1 GB in total in 4-MB increments. one that was originally deployed pre-Nautilus) breaks the pool utilization stats reported by ``ceph df``. Ca marcheparfois !. OPTION(osd_scrub_auto_repair_num_errors, OPT_U32, 5) // only auto-repair when number of errors is below this threshold: ceph osd erasure-code-profile set myprofile \. ceph osd crush reweight -> Adjust an OSD’s crush weight; ceph auth list -> List cluster keys. Ceph create osd. OSD (Object Storage Daemon) - устройство хранения объектов в Ceph. 1 config get osd_scrub_min-interval. It is flexible, exceptionally reliable, and easy to manage. A Ceph cluster needs at least two Ceph OSD servers. The ceph-osd daemon may have been stopped, or peer OSDs may be unable to reach the OSD over the network. Ceph cluster monitoring video. ceph -w - continuous display of what is happening inside cluster. My cluster was throwing warning Legacy BlueStore stats reporting detected and we could just not abide that. MDS配置模式分为以下三种: 冷备模式:同一时间,只有一个mds工作,单纯的进程备份。; 热备模式:同一时间,只有一个mds工作,但除了进程备份,也实时备份元数据,这样可以加快MDS故障切换时间。. 85) : When an OSD locally reaches this threshold it will refuse to migrate a PG to itself. After the repair, now shows "active+clean+inconsistent+failed_repair" for the PG in the question and cannot bring the cluster to "active+clean". (mon-pod):/# ceph -s cluster: id: 9d4d8c61-cf87-4129-9cef-8fbf301210ad health: HEALTH_WARN too few PGs per OSD (23 < min 30) mon voyager1 is low on available space services: mon: 3 daemons, quorum voyager1,voyager2,voyager3 mgr: voyager1(active), standbys: voyager3 mds: cephfs-1/1/1 up {0=mds-ceph-mds-65bb45dffc-cslr6=up:active}, 1 up:standby osd: 24 osds: 23 up, 23 in rgw: 2 daemons active. Pastebin is a website where you can store text online for a set period of time. Copy the configuration file and admin key to all Ceph nodes so we can manage it without specifying keyring:. List the disks on nodes by, # ceph-deploy disk list ceph-node1. # ceph osd unset noout; Switch any existing CRUSH buckets to the latest bucket type straw2. You can run the ceph osd pool mksnap command to create a snapshot of the pool and restore it if necessary. Ceph is a distributed object, block, and file storage platform - ceph/ceph This marks a PG for immediate scrub or repair. Ceph cluster monitoring video. $ sudo ceph osd crush remove osd. Ceph Object Store Devices (OSD) are responsible for storing objects on local file systems and providing access to them over the network. kubectl create -f toolkit. 2, such that the cluster only switches to using the more accurate per-pool stats after all OSDs are 14. When you have a running cluster, you may use the ceph tool to monitor it. in the cluster, use the following command to get into. One of the ceph-osd processes is unavailable due to a possible service failure or problems with communication with other OSDs. 37c repair starts. [ceph-users] Re: How to recover from active+clean+inconsistent+failed_repair? [SOLVED] Frank Schilder Tue, 03 Nov 2020 11:23:19 -0800. While the underlying filesystem may provide for redundancy, error detection and repair on its own, Ceph implements its own layer of error detection, recovery and n-way replication. OSD - is the daemon that handles the reading and writing of data to a physical disk. service ceph-osd. Here are some common commands to troubleshoot a Ceph cluster: ceph status; ceph osd status; ceph osd df; ceph osd utilization; ceph osd pool stats; ceph osd tree; ceph pg stat; The first two status commands provide the overall cluster health. Taking snapshot of a pool # rados mksnap snapshot01 -p. stop the OSD that has the wrong object responsible for that PG; flush the journal (ceph-osd -i --flush-journal) move the bad object to another location; start the OSD again; call ceph pg repair 17. Basic knowledge of cep. 42 $ ceph pg repair 51. The default replication size for a Ceph pool created with ceph emperor or earlier releases is two. Subcommand create creates new osd (with optional UUID and ID). In order to allow clearing of the warning, a new command ceph tell osd. 0 instructing pg 3. MonCommandApi is a class that provides access to the whole Ceph command line API in a type save way. May 24, 2012 1,866 62 68. 27a" has issue and its acting on osd. They sit on top of an existing filesystem such as ext4, xfs, zfs or btrfs and are created and maintained by an Object Store Device Daemon (OSD). WTH, this made no difference. In our case, we are looking to set the ‘mon_osd_full_ratio’ to 98%. 关闭pg所在的主osd. Install ceph Installation depends about which version you want as they're all locked into Fixed releases (argonaut, bobtail etc). It is like an fsck and repair tool for the OSD's store. 37c 以上命令执行后均未修复,依然报上面的错误,查看相关osd 日志报错如下: 2017-07-24 17:31:10. instructing pg 9. Remove Ceph OSD via CLI. keyring Step2 : 編輯 /etc/ceph/ceph. Ceph OSD is a daemon running on a Ceph node, responsible for storing RADOS objects. 37c repair starts. In your project repository, if the nodes are not generated dynamically, add the following lines to cluster/ceph/init. 1 ceph pg scrub 8. [[email protected] ~]# date ; ceph pg repair 1. {osd-number}# 添加osd到crush map,则该osd可以接受数据了,这个时候osd的状态为 down & in。 ceph osd crush add osd. When I ran ceph osd status, I see that one of the 1TB OSD is nearfull which isn't right. osd_down: Returns OK if your OSDs are all up. Cluster start and stop. 19 legacy statfs reporting detected, suggest to run store repair to get consistent statistic reports osd. cm # Get crush map crushtool -d comp_crush_map. ceph health detail HEALTH_WARN 2 pgs backfilling; 2 pgs stuck unclean; recovery 17117/9160466. Ceph OSD is a daemon running on a Ceph node, responsible for storing RADOS objects. Adding/Removing OSDs¶. Previous by thread: Re: OSD repair: on disk size does not match object info size. WTH, this made no difference. Ceph OSD is a daemon running on a Ceph node, responsible for storing RADOS objects. In fact, a pg repair is a special kind of deep-scrub that attempts to fix irregularities it finds. cm -o new_crush_map. dpkg-buildpackage -us -uc -b -j 4. 大多数情况下,Ceph可以算出pg在哪个osd上的. # clear_shards_repaired [count] has been added. Description: Red Hat Ceph Storage is a scalable, open, software-defined storage platform that combines the most stable version of the Ceph storage system with. When a scrub is performed on a placement group, the OSD attempts to choose an authoritative copy from among its replicas. Find the object. cm # Get crush map crushtool -d comp_crush_map. In order to allow clearing of the warning, a new command ceph tell osd. This article describes the metrics that can be configured using the Ceph (ceph Storage Monitoring) probe. osd_orphan: Returns OK if you have no orphan OSD. 5 on ceph1-ib starting osd. Ceph Command Line API¶. cm # Get crush map crushtool -d. Re: OSD repair: on disk size does not match object info size. Block Storage. Some mornings, when I ceph the cluster health, I. Osd - Scrub and Repair¶ Summary¶. conf][DEBUG. With CEPH and 5 chassis you'll have 180 OSDs. 20 to repair [[email protected] ~] ceph pg repair 2. 5 ceph auth del osd. This is the only component of the Ceph cluster where actual user data is stored, and the same data is retrieved when the client issues a read operation. Ceph 存储集群 API osd pool repair; osd pool rm; osd pool rmsnap; osd pool scrub; osd pool set; osd pool set-quota; osd pool stats; osd primary-affinity; osd. Each Ceph daemon, such as Ceph OSD, Ceph Monitor, or Ceph Metadata Server reads its configuration from a corresponding section in the Ceph configuration file (/etc/ceph. 知道 OSD 35 有问题,但我们现在还不知道对应的是具体哪块磁盘。我们可以登录到对应到 OSD 服务器上查看 OSD 35 的目录名称,并查看 PVS 的对应关系来. The ceph-osd process was reading through the log areas of each PG in the OSD, and once it reached the problematic PG it crashed due to failing an assert condition. In this case, we can start that ceph-osd and things will recover. pods into the cluster. More Information on Placement Group Repair ¶. Ceph is an open-source, massively scalable, software-defined storage system which provides object, block and file system storage in a single platform. We help you to do this via both Proxmox VE GUI and command-line interface. (An incomplete guide, v0. If a ceph OSD loses its disk, and if the system's "auto repair" option similarly includes "osd", then whenever a new disk is added to the enclosure **in the same enclosure/slot as the failed OSD disk** that disk is automatically converted to a new global spare which is **dedicated to the repair of that specific OSD**, and the OSD will. 命令:ceph osd out osd. To create the new OSD internally in Ceph, create the OSD structure on the new disk, and generate the CephX key for the new OSD, you can use: ceph osd create ceph-osd -i 3 --mkfs --mkkey The new key needs to be loaded into the existing keyring immediately:. service ceph-osd. Several SAS OSDs in our Ceph cluster were replaced with faster SSDs while re-using the old OSD IDs. Two object stores mark the beginning of a Ceph cluster and they may be joined by potentially thousands more. 7: /usr/bin/ceph-osd() [0x5f0f69] The above is a log snippet at which the OSD process was crashing. It runs on commodity hardware-saving you costs, giving you flexibility and because it's in the Linux kernel. I tryed ceph pg repair command on this pg: $ ceph pg repair 4. Adding new OSD is not difficult task, and it can be done via ceph-deploy or by running ceph-disk. Now we have to dive into OSD 21 directory, thanks to the information we have it is pretty. After the repair, now shows "active+clean+inconsistent+failed_repair" for the PG in the question and cannot bring the cluster to "active+clean". Relevant releases/architectures: Red Hat Ceph Storage 3. instructing pg 9. 33 $ ceph pg repair 41. 27a" has issue and its acting on osd. On-disk corruption is transmitted to Ceph users. 解决方案:使用ceph pg repair工具进行数据修复,一般情况下都可以恢复正常,如果无法恢复. b query command. 24 to repair [[email protected] ~] ceph pg repair 9. Shows you how can you monitor ceph monitors (mon) and ceph storage (osd) using ceph command line tools. osd_down: Returns OK if your OSDs are all up. One of the ceph-osd processes is unavailable due to a possible service failure or problems with communication with other OSDs. If your data and journal are on the same physical disk, I personally would put them on the same partition/file system. ceph osd进程中,由周期性timer线程检查pg是否需要做scrub,另外,也可以通过命令行(ceph pg scrub pgid)触发scrub, 实现的时候主要是设置一个must_scrub标志位完成,不难看出,scrub的粒度是以pg为单位进行的。. Because of the non raid setup each disk is a osd -> 4 osd's. 75GiB amount of information. ceph osd pool create erasure ceph osd crush rule dump ceph osd pool application enable ceph osd pool delete < pool-name> < pool-name> --yes-i-really-really-mean-it ceph osd pool get < poolname> all ceph osd pool ls detail ceph osd pool rename. Ceph Command Line API¶. You should repair the disk! Invalid partition data! To fix this: [email protected]:~# sgdisk --clear --mbrtogpt /dev/sda Then re-create the Pods: [email protected]:~# kubectl -n rook delete po/rook-ceph-osd-7hzsd pod "rook-ceph-osd-7hzsd" deleted [email protected]:~# kubectl -n rook delete po/rook-ceph-osd-c2bbk pod "rook-ceph-osd-c2bbk" deleted. 1c1 and check if this will fix your issue. Additional info: From an IRC conversation with Greg Farnum: The ceph-objectstore-tool utility is a tool for interacting with the OSD objectstore. A Ceph cluster needs at least two Ceph OSD servers. The Ceph cluster is built on the basis of distributing the load of the service repairing the LevelDB, and setting up the OSD with the new journal, the OSD started and the two. We can remove Proxmox Ceph OSD via both the GUI and command-line interface. Ceph 存储集群 API osd pool repair; osd pool rm; osd pool rmsnap; osd pool scrub; osd pool set; osd pool set-quota; osd pool stats; osd primary-affinity; osd. ceph-disk is a utility that can prepare and activate a disk, partition or directory as a Ceph OSD. After upgrading all OSD nodes, unset the noout flag on a Ceph Monitor node. 11f Wed Nov 28 18:16:25 KST 2018 instructing pg 1. In this setup it is common to share a journal SSD between multiple OSD (data) drives. 05 like I mentioned just a. Not acceptable option. osd_backfill_full_ratio - (default : 0. Listing of pools can be done in two ways, # ceph osd lspools # rados lspools 3. ceph creat osd fail [ceph_deploy][ERROR ] GenericError: Failed to create 1 OSDs. 2019/03/29 ypdai. 77 $ ceph pg repair 51. Legacy BlueStore stats reporting detected on 5 OSD(s) osd. Existing OSD directories will continue to function after an upgrade to. While expanding a cluster you might always felt a need to add Ceph OSD in Proxmox. If you are trying to set up a 1-node cluster and osd crush chooseleaf type is greater than 0, Ceph will try to peer the PGs of one OSD with the PGs of another OSD on another node, chassis, rack, row, or even datacenter depending on the setting. Merged osd: auto repair EC pool #6196. 3T 53% /var/lib/ceph/osd/ceph-141 Go to your datacenter with a new physical drive and replace the drive physically , i assume depending on enterprise server that you are using it should be hot swappable , These days almost all servers support hot swapping of disks , but still you should check for your server model. Subcommand create creates new osd (with optional UUID and ID). b query command. Rebooting the Director; 10. (mon-pod):/# ceph -s cluster: id: 9d4d8c61-cf87-4129-9cef-8fbf301210ad health: HEALTH_WARN too few PGs per OSD (23 < min 30) mon voyager1 is low on available space services: mon: 3 daemons, quorum voyager1,voyager2,voyager3 mgr: voyager1(active), standbys: voyager3 mds: cephfs-1/1/1 up {0=mds-ceph-mds-65bb45dffc-cslr6=up:active}, 1 up:standby osd: 24 osds: 23 up, 23 in rgw: 2 daemons active. ceph --admin-daemon socket-file-path command. ceph-2:~ # cat /var/lib/ceph/osd/ceph-3/bluefs 1. 11f Wed Nov 28 18:16:25 KST 2018 instructing pg 1. May 24, 2012 1,866 62 68. Ceph is an open-source, massively scalable, software-defined storage system which provides object, block and file system storage in a single platform. But some of PGs which has one replica on broken OSD stuck in active+undersized+degraded state and can't find new OSD to store third replica(ATM all these PGs have only 2 replicas) Does anybody met with this problem and have any solution?. 2 ceph osd out 2 ceph osd crush remove osd. Thread starter RobFantini. It runs on commodity hardware-saving you costs, giving you flexibility and because it's in the Linux kernel. sudo ceph osd pool create benchmark 256 256 sudo ceph osd pool set benchmark crush_ruleset 5 sudo ceph osd pool set benchmark size 3 sudo ceph osd pool set benchmark min_size 2 rados -p benchmark df. Report a Documentation Bug. Ceph Ready systems and racks offer a bare metal solution ready for both the open source community and validated through intensive testing under Red Hat Ceph Storage. # ceph osd unset nodeep -scrub unset nodeep -scrub. Ceph (pronounced /ˈsɛf/) is an open-source software storage platform, implements object storage on a single distributed computer cluster, and provides 3-in-1 interfaces for object-, block- and file-level storage. For example, lets run a repair on PG 57. Find the object. This command also fails: # rados list-inconsistent-obj 4. If your data and journal are on the same physical disk, I personally would put them on the same partition/file system. Legacy BlueStore stats reporting detected on 5 OSD(s) osd. Apabila rekan2 mengalami hal ini pada Ceph Storage. 19 legacy statfs reporting detected, suggest to run store repair to get consistent statistic reports osd. Osd - Scrub and Repair » History » Version 3. 0, all drives (or drive partitions) in a Storage Group are expected to have the same capacity, and so OSD weight is set to 1. Ceph stores and updates the checksums of objects stored in the cluster. Ceph OSDs (ceph-osd) - Handles the data storage, data replication, and recovery. In our case, we are looking to set the ‘mon_osd_full_ratio’ to 98%. Ceph 存储集群 API osd pool repair; osd pool rm; osd pool rmsnap; osd pool scrub; osd pool set; osd pool set-quota; osd pool stats; osd primary-affinity; osd. [Original Bug Report] During an Autopilot deployment on gMAAS, Juju had hung running a mon-relation-changed hook $ ps afxwww | grep -A 4 [m]on. juju-log mon:45: ceph bootstrapped, rescanning. Usually, one OSD daemon is tied to one physical disk in your cluster. 建立后如下命令查看:. Hi everyone, All current Nautilus releases have an issue where deploying a single new (Nautilus) BlueStore OSD on an upgraded cluster (i. Adjust the sched_scrub() code so that we handle these PGs even when should_schedule_scrub is false (e. ceph osd deep-scrub ceph osd repair ceph osd lspools {} ceph osd blacklist ls ceph osd crush rule list ceph osd crush rule ls ceph osd crush rule dump {} ceph osd crush dump ceph osd setcrushmap ceph osd crush set ceph osd crush add-bucket ceph osd crush set [/current/meta/ to persist the OSDMap data. 22 legacy statfs reporting detected, suggest to run store repair to get. Hello, Wanted to follow up so there is a trail. WTH, this made no difference. Ceph-OSD replacing a failed disk¶. The setup is: 5 hosts with 4 HDDs and 1 SSD as journal-device; interconnected by 3x 1 GBit bonding interface; separated private network for all ceph traffic; Here is the ouput of the ceph. [Original Bug Report] During an Autopilot deployment on gMAAS, Juju had hung running a mon-relation-changed hook $ ps afxwww | grep -A 4 [m]on. osd: auto repair EC pool #6196. If you see 'active+clean+inconsistent' states, this may happen due to an error during scrubbing. 1 ceph osd repair osd. The following branch will exist until this feature is merged, or something comparable is implemented. Relevant releases/architectures: Red Hat Ceph Storage 3. 85) : When an OSD locally reaches this threshold it will refuse to migrate a PG to itself. In the case of the clay plugin configured with k=8. OK, it’s gone from ceph osd tree , but ceph pg dump_stuck stale still reports a problem with a placement group on “[4]”. Флаги отразятся в claster health: Эти флаги блокируют новый Scrub, но уже запущенные проверки не отклоняются и будут завершены. Merged dzafman merged 4 commits into ceph: master from guangyy: wip-12754 Oct 20, 2015. The ceph-osd daemon may have been stopped, or peer OSDs may be unable to reach the OSD over the network. 本文为Ceph中国行•武汉站上,杉岩数据高级研发工程师花瑞做的内容分享,闲言少叙,直接上干货。 1. 7fff query|grep primary "same. 585305 7f72893c4700 0 log_channel(cluster) log [INF] : 2. The command to create a ceph pool is as follows. 1c1; It might look a bit rough to delete an object but in the end it’s job Ceph’s job to do that. class ceph_command_api. Lu s New or Quiet Member. Alternatively, if there is a catastrophic failure of osd. You can configure a Storage Cluster on non-identical hardware from different manufacturers. re-add ceph-osd charm to the unit and hope to pick up the disks and rejoin the cluster. osd_orphan: Returns OK if you have no orphan OSD. # ceph osd pool create newpool 128 128. Several SAS OSDs in our Ceph cluster were replaced with faster SSDs while re-using the old OSD IDs. Pastebin is a website where you can store text online for a set period of time. You can always try to run ceph pg repair 17. id and the command gives "instructing pg x on osd y to repair" seems to be working as intended. 42 is active+clean+inconsistent, acting [17,6,0]. repair(修复) PG 正在被检查, 被发现的任何不一致都将尽可能被修复. May 24, 2012 1,866 62 68. It is run directly or triggered by ceph-deploy or udev. OSD (Object Storage Daemon) - устройство хранения объектов в Ceph. Configuring Ceph. Here are the steps our Support Engineers follow to do remove OSD from the cluster. Find the object. [[email protected] ~]# ceph health detail HEALTH_ERR 2 scrub errors; Possible data damage: 2 pgs inconsistent OSD_SCRUB_ERRORS 2 scrub errors PG_DAMAGED Possible data damage: 2 pgs inconsistent pg 3. When you have a running cluster, you may use the ceph tool to monitor it. Listing of pools can be done in two ways, # ceph osd lspools # rados lspools 3. osd pool default pg num = 128 osd pool default pgp num = 128 osd crush chooseleaf type = 1 osd max backfills = 10 # Allow btrfs to work: enable experimental unrecoverable data corrupting features = btrfs. Common causes include a stopped or crashed daemon, a down host, or a network outage. Ceph's monitoring and self-repair features minimize administration overhead. After running. 2:在ceph集群中创建一个pool [[email protected]~]# ceph osd pool create rbdtest 100 #这里的100指的是PG组: 3:查看集群中所有pool的副本尺寸 [[email protected]~]# ceph osd dump | grep 'replicated size' 4:查看pool 最大副本数量. Reboot the node. notieragent 停止tier引擎查找冷数据并下刷到后端存储。 cpeh osd set {option} 设置所有osd标志 ceph osd unset {option} 接触所有osd标志 使用下面的命令去修复pg和osd ceph osd repair :修复一个特定的osd ceph pg repair 修复一个特定的pg,可能会影响用户的数据,请谨慎使用。 ceph pg. yml and modify according to your. [email protected]:~# ceph-deploy osd create --data /dev/sdb1 node1 [ceph_deploy. It is flexible, exceptionally reliable, and easy to manage. All manager daemons are currently down. I tryed ceph pg repair command on this pg: $ ceph pg repair 4. This file will configure Ceph to operate a monitor, two OSD daemons and one metadata server on your local machin. Not acceptable option. You can configure a Storage Cluster on non-identical hardware from different manufacturers. 85) : When an OSD locally reaches this threshold it will refuse to migrate a PG to itself. 前提:由于存储掉电, 导致启动后无法启动 OSD利用 ceph osd tree 可以发现故障 OSD 位置当前架构2 sata 磁盘创建 raid1 作为系统盘10 sata 磁盘, 每个创建独立的 raid0 , 作为独立 ceph osd 磁盘使用2 ssd 磁盘 ( 每个 ssd 独立划分 5 分区 ) 每个磁盘分区对应一个 ceph osd 作为 raw jour. Until all OSDs have been reprovisioned or updated (via ceph-bluestore-tool repair), the pool stats will show values that are lower than the true value. yml and modify according to your. [prev in list] [next in list] [prev in thread] [next in thread] List: ceph-devel Subject: Re: [ceph-users] Failed to repair pg From: Herbert Alexander Faleiros Date: 2019-03-08 12:52:24 Message-ID: 20190308125224. ceph osd blocked-by. Cephのアーキテクチャー概要です 2016/02/12 ver1. 4ga query |more ) to get a list of the acting OSDs. While the underlying filesystem may provide for redundancy, error detection and repair on its own, Ceph implements its own layer of error detection, recovery and n-way replication. Hello, I've a trouble, I've a ceph cluster with 3 replicas per OSD. 14 instructing pg 9. The command to create a ceph pool is as follows. You can also set the owner property of the pool for access control. ceph osd crush reweight -> Adjust an OSD’s crush weight; ceph auth list -> List cluster keys. [[email protected] ~]# date ; ceph pg repair 1. service ceph-osd. « Previous - Version 3/5 (diff) - Next » - Current Current scrub and repair is fairly primitive. osd_backfill_full_ratio - (default : 0. osd-prepare. 6 to repair And, after few minutes, the pg seems to be healthy again: $ ceph health detail HEALTH_OK And querying this pg with ceph pg 4. ceph osd crush reweight osd. ceph osd pool set target_max_bytes ceph osd pool set target_max_objects Normal cache flush and evict activity may also be throttled due to reduced availability or performance of the base tier, or overall cluster load. It can also be triggered by other deployment utilities like Chef , Juju , Puppet etc. $id compact or ■ Add leveldb_compact_on_mount = true in [osd. Rebooting Controller Nodes; 10. When you have a cluster up and running. ceph pg repair 7. with ceph-deploy, just after the ceph-deploy osd activate phase and the distribution of keys, the One thing that is not mentioned in the quick-install documentation with ceph-deploy or the OSDs. In fact, a pg repair is a special kind of deep-scrub that attempts to fix irregularities it finds. In the case of the clay plugin configured with k=8, m=4 and d=11 when a single OSD fails, d=11 osds are contacted and 250MiB is downloaded from each of them, resulting in a total download of 11 X 250MiB = 2. With CEPH and 5 chassis you'll have 180 OSDs. $id] or [osd] section and. Copy the configuration file and admin key to all Ceph nodes so we can manage it without specifying keyring:. 7 Replicating from OSD-based to replication across hosts in a ceph cluster. after a configuration change. ceph daemon osd. More detailed information can be retrieved with ceph status that will give us a few lines about the. 5dcc and check the dump_scrubs output:. You can configure a Ceph Storage Cluster on non-identical hardware from different manufacturers. Sometime it does, something it does not and you need to dig further. It is flexible, exceptionally reliable, and easy to manage. Shows you how can you monitor ceph monitors (mon) and ceph storage (osd) using ceph command line tools. b query > - ceph pg dump > - ceph osd df tree > in a pastebin? Yes, the Primary OSD is 0. ceph df / ceph df detail - very nice overview, pools, sizes, objects etc. We do this to copy data to other OSDs. Pastebin is a website where you can store text online for a set period of time. Then, replace {ip-address} with the IP address of your host. when ceph-osd is being deployed, it remains on the "blocked" stage with the status "No block unit-ceph-osd-0: 00:19:12 INFO unit. 05 like I mentioned just a. osd_recovery_max_single_start: 1 => 4 The maximum number of recovery operations per OSD that will be newly started when an OSD is recovering; See 2. Until all OSDs have been reprovisioned or updated (via ceph-bluestore-tool repair), the pool stats will show values that are lower than the true value. ceph osd pool set target_max_bytes ceph osd pool set target_max_objects Normal cache flush and evict activity may also be throttled due to reduced availability or performance of the base tier, or overall cluster load. More detailed information can be retrieved with ceph status that will give us a few lines about the. Ceph OSDs (ceph-osd) - Handles the data storage, data replication, and recovery. $ ceph-deploy osd prepare ceph-osd0: / var / local / osd0 ceph-osd1: / var / local / osd1 $ ceph-deploy osd activate ceph-osd0: / var / local / osd0 ceph-osd1: / var / local / osd1 9. But some of PGs which has one replica on broken OSD stuck in active+undersized+degraded state and can't find new OSD to store third replica(ATM all these PGs have only 2 replicas) Does anybody met with this problem and have any solution?. 2, such that the cluster only switches to using the more accurate per-pool stats after all OSDs are 14. 34 to repair #查看集群监控状态 $ ceph health detail HEALTH_ERR 1 scrub errors; Possible data damage: 1 pg inconsistent, 1 pg repair OSD_SCRUB_ERRORS 1 scrub errors PG_DAMAGED Possible data damage: 1 pg inconsistent, 1 pg repair pg 3. Ceph osd repair. Ceph prevents clients from performing I/O operations on full OSD nodes to avoid losing data. This document is for a development version of Ceph. Before just removing the OSD, we change status of OSD to out and down. OSD Removal Caveat¶ There was a bug introduced in Jewel (#19119) that broke the mapping behavior when an “out” OSD that still existed in the CRUSH map was removed with ‘osd. With CEPH and 5 chassis you'll have 180 OSDs. 585305 7f72893c4700 0 log_channel(cluster) log [INF] : 2. stop the OSD that has the wrong object responsible for that PG; flush the journal (ceph-osd -i --flush-journal) move the bad object to another location; start the OSD again; call ceph pg repair 17. 5dcc and check the dump_scrubs output:. When you add or remove Ceph OSD Daemons to a cluster, the CRUSH algorithm will want to rebalance the cluster by moving placement groups to or from Ceph OSD Daemons to restore the balance. Create an Object Storage Device(OSD) on ceph-node1 and add it to the ceph cluster by, 1. In fact, a pg repair is a special kind of deep-scrub that attempts to fix irregularities it finds. RobFantini Renowned Member. Common causes include a stopped or crashed daemon, a down host, or a network outage. 2 is near full at 85% osd. osd_recovery_max_single_start: 1 => 4 The maximum number of recovery operations per OSD that will be newly started when an OSD is recovering; See 2. Set the number of placement groups. ceph osd down/out. Ceph block devices are thin-provisioned, resizable and store data striped over multiple OSDs in a Ceph's RADOS Block Devices (RBD) interact with OSDs using kernel modules, or the librbd library. Ceph-OSD replacing a failed disk¶. ceph osd pool set {name} noscrub 1 ceph osd pool set {name} nodeep-scrub 1. Each Ceph daemon, such as Ceph OSD, Ceph Monitor, or Ceph Metadata Server reads its configuration from a corresponding section in the Ceph configuration file (/etc/ceph. I have some problems in a ceph cluster. After doing the "ceph health detail" and getting a list of the pgs, do a manual scrub. d/ceph start osd repair. For this, we use the command, ceph osd out {osd-num} 2. Server1 has 4 OSD processes running, which would indicate there are 4 physical disks used by Ceph on the server. Ceph is designed to remain highly available despite individual failures of hard disks, nodes, or entire racks when a cluster is correctly designed. 11f Wed Nov 28 18:16:25 KST 2018 instructing pg 1. 2 (or later), are BlueStore, and (if they were created prior to. If a ceph OSD loses its disk, and if the system's "auto repair" option similarly includes "osd", then whenever a new disk is added to the enclosure **in the same enclosure/slot as the failed OSD disk** that disk is automatically converted to a new global spare which is **dedicated to the repair of that specific OSD**, and the OSD will. Now be ready to wait for a long time as this can take 2 hours as it does on my laptop. In this setup it is common to share a journal SSD between multiple OSD (data) drives. Ceph OSD HDD All servers are fitted with four (old) 1TB 7200 RPM 3. As of Luminous, the option to re-use an OSD ID is available and it really speeds up the rebalancing. We can do it by using: # ceph tell mon. Once you’ve installed them:. In order to allow clearing of the warning, a new command ceph tell osd. re-add ceph-osd charm to the unit and hope to pick up the disks and rejoin the cluster. Troubleshooting Director Issues. For example, our OSD servers have 8 or 10 spinning-rust drives for Ceph OSDs, and the journals are distributed over two SSDs. 使用ceph命令提示handle_connect_reply connect got BADAUTHORIZER. 37c 以上命令执行后均未修复,依然报上面的错误,查看相关osd 日志报错如下: 2017-07-24 17:31:10. Ceph is a distributed object store and filesystem designed to provide excellent performance, reliability, and scalability. 1 ceph iostat ceph telemetry status. b query > - ceph pg dump > - ceph osd df tree > in a pastebin? Yes, the Primary OSD is 0. when ceph-osd is being deployed, it remains on the "blocked" stage with the status "No block unit-ceph-osd-0: 00:19:12 INFO unit. ceph osd repair < who > 子命令 reweight 把 OSD 权重改为 0. $id compact or ■ Add leveldb_compact_on_mount = true in [osd. * repair_copy allows client to specify what to copy, like data, xattr and omap, while copy_from copies whatever the src OSD returns. [Regression Potential] Minimal; already in later Ubuntu releases. * repair_copy. 1 ceph osd repair osd. Report a Documentation Bug. Description: Red Hat Ceph Storage is a scalable, open, software-defined storage platform that combines the most stable version of the Ceph storage system with. osd pool default pg num = 128 osd pool default pgp num = 128 osd crush chooseleaf type = 1 osd max backfills = 10 # Allow btrfs to work: enable experimental unrecoverable data corrupting features = btrfs. This article describes the metrics that can be configured using the Ceph (ceph Storage Monitoring) probe. ceph osd df tree. ceph creat osd fail [ceph_deploy][ERROR ] GenericError: Failed to create 1 OSDs. 2 ceph osd out 2 ceph osd crush remove osd. Ceph prevents clients from performing I/O operations on full OSD nodes to avoid losing data. 建立后如下命令查看:. ceph-osd: storage: osd-devices: /var/tmp/osd-1. Q&A for Ubuntu users and developers. This is the only component of the Ceph cluster where actual user data is stored, and the same data is retrieved when the client issues a read operation. [ceph-users] Re: How to recover from active+clean+inconsistent+failed_repair? [SOLVED] Frank Schilder Tue, 03 Nov 2020 11:23:19 -0800. It is run directly or triggered by ceph-deploy or udev. dpkg-buildpackage -us -uc -b -j 4. The Operational Services Division (OSD) serves both our business and government customers through a variety of services and programs ranging from managing the state fleet of vehicles, managing the Commonwealth’s COMMBUYS Procurement Market Center, certifying diverse businesses looking to do business with the Commonwealth, to management and oversight of the procurement of goods and services. Execute ifconfig on the command line to retrieve the IP address of your host. $ cat repair. repair(修复) PG 正在被检查, 被发现的任何不一致都将尽可能被修复. [global] fsid = fd78cbf8-8c64-4b12-9cfa-0e75bc6c8d98 mon initial members = monitor mon host = 172. /dev/sdk1 2. ceph auth list sudo ceph osd set norebalance. Here are some common commands to troubleshoot a Ceph cluster: ceph status; ceph osd status; ceph osd df; ceph osd utilization; ceph osd pool stats; ceph osd tree; ceph pg stat; The first two status commands provide the overall cluster health. keyring Step2 : 編輯 /etc/ceph/ceph. Troubleshooting OSDs¶. This will now yield a list of packages you need to install. It is now grouped in the list of articles that need formatting improvements. Hence, this successfully removes the OSD. List the disks on nodes by, # ceph-deploy disk list ceph-node1. 2 is near full at 85% osd. 把三副本的osd的osd_max_scrubs都先调大,再次使用使用ceph pg repair工具进行数据修复,最后再将osd_max_scrubs调回1. 585305 7f72893c4700 0 log_channel(cluster) log [INF] : 2. To run the ceph tool in an interactive mode, type ceph at the command line with no arguments. In order to allow clearing of the warning, a new command ceph tell osd. osd: report per-osd omap usage osd: set pg length dynamically preallocate wal files rbd-nbd: add support for using kernel netlink interface rbd: improved in-memory cache rbd: online re-sparsify of images rbd: support deferring long-running operations to the MGR rbd support module RECENT_CRASH, ceph health archive[-all] rgw: bucket tagging. cm # Decompile map vim crush_map. ceph osd blocklist rm. August 2020. 1 to repair 4、检查 Ceph 集群是否恢复到 HEALTH_OK. Troubleshooting Node Registration; 11. /dev/sdk1 2. [[email protected] ~]# date ; ceph pg repair 1. One of the ceph-osd processes is unavailable due to a possible service failure or problems with communication with other OSDs. * injectargs "--mon_osd_full_ratio. On-disk corruption is transmitted to Ceph users. RepairDB(”) >>> That’s all. After mounting it in /mnt/lvm/ceph, ceph-deploy was used to designate it as a directory to be used for the OSD. 直接删除object看起来有些粗暴,但最终是由Ceph job做了一些工作。. As a consequence, the surviving ceph-osd daemons reported this. Block Storage. It is now grouped in the list of articles that need formatting improvements. I have some problems in a ceph cluster. restapi mds 'allow' osd 'allow *' mon 'allow *' > /etc/ceph/ceph. The corresponding OSDs were marked out manually. There are several improvements which need to be made. 4 $ sudo ceph osd rm 4 WTH, this made no difference. ceph osd repair -> Repair an OSD; ceph osd pool create/delete --> Create or delete a storage pool; ceph tell osd. txt (text/plain — 89. We can see that Ceph made adjustments to 4 OSDs and only lowered their weight by. With CEPH and 5 chassis you'll have 180 OSDs. Here's a simple way to upgrade:. In a storage cluster of three nodes, with 12 OSDs, adding a node adds 4 OSDs and increases capacity by 33%. $id compact or ■ ceph daemon osd. ceph deis cisco ssh md5 infiniband lsi sas server raid intel grub lvm wipefs software development apps outsourcing ilo2 archlinux linux. [Original Bug Report] During an Autopilot deployment on gMAAS, Juju had hung running a mon-relation-changed hook $ ps afxwww | grep -A 4 [m]on. 34 to repair #查看集群监控状态 $ ceph health detail HEALTH_ERR 1 scrub errors; Possible data damage: 1 pg inconsistent, 1 pg repair OSD_SCRUB_ERRORS 1 scrub errors PG_DAMAGED Possible data damage: 1 pg inconsistent, 1 pg repair pg 3. Common causes include a stopped or crashed daemon, a down host, or a network outage. GitHub Gist: instantly share code, notes, and snippets. Causes and Resolutions. Available capacity will be slightly superior (using erasure coding): 1152 TB in case of a multiple disk crash you'll have to rebuild only the number of failed disks (unless it's an entire server, it will always be less than 256 TB). Block Storage. service ceph-osd. As of Luminous, the option to re-use an OSD ID is available and it really speeds up the rebalancing. [[email protected] ~]# ceph health detail HEALTH_ERR 2 scrub errors; Possible data damage: 2 pgs inconsistent OSD_SCRUB_ERRORS 2 scrub errors PG_DAMAGED Possible data damage: 2 pgs inconsistent pg 3. osd_backfill_full_ratio - (default : 0. $ ceph pg repair 41. 1 config get osd_scrub_min-interval. I would probably try: - find out with smartctl if the OSD with scrub errors is in a pre-fail state (has remapped sectors) - if it is: * take it down and try to make a full copy with ddrescue * if ddrescure manages to copy everything, copy back to a new disk and add to ceph * if ddrescue fails to copy everything, you could try if badblocks. sudo reboot. Q&A for Ubuntu users and developers. id and the command gives "instructing pg x on osd y to repair" seems to be working as intended. ceph-bluestore-tool bluefs-bdev-migrate –path osd path –dev-target new-device –devs-source device1 [–devs-source device2] Description ceph-bluestore-tool is a utility to perform low-level administrative operations on a BlueStore instance. 12 instructing pg 2. • OSD and MDS statistics • Ceph client performance Diagnose • Predictive disk failure analysis • Guided troubleshooting • Guided OSD repair process Manage • OSD management • Cluster configuration management • Graceful system shutdown Role -based Ceph Mgr dashboard Storage enclosure integration • RBD QoS parameters. [ceph-users] Re: How to recover from active+clean+inconsistent+failed_repair? [SOLVED] Frank Schilder Tue, 03 Nov 2020 11:23:19 -0800. The fs_apply_latency is too high which leads to high load and slow responding qemu VMs (which use ceph images as VHD). 27a" has issue and its acting on osd. Common causes include a stopped or crashed daemon, a down host, or a network outage. 04 servers in this setup. We can remove Proxmox Ceph OSD via both the GUI and command-line interface. This procedure will *not* let you change that, neither shrink nor grow. 585305 7f72893c4700 0 log_channel(cluster) log [INF] : 2. One or more OSDs are marked down. 7fff query|grep primary "same. 1 ceph iostat ceph telemetry status. Rebooting Object Storage Nodes; 11. 9 How reproducible: ceph osd set noscrub, ceph osd set nodeep-scrub ; sleep for a week ; ceph osd unset noscrub ; ceph osd unset nodeep-scrub Steps to Reproduce: 1. What is not entirely obvious is that a ceph pg repair operation is also a scrub op and lands in the same queue of the primary OSD. This prevents rebalancing or repair from overfilling an OSD. 20 to repair [[email protected] ~] ceph pg repair 2. For example, lets run a repair on PG 57. The ‘ceph tell’ is a very useful command in the sense the administrator don’t need to stop/start the OSDs, MONs etc. Ceph 存储集群 API osd pool repair; osd pool rm; osd pool rmsnap; osd pool scrub; osd pool set; osd pool set-quota; osd pool stats; osd primary-affinity; osd. Start date Jul 26, 2014. Ceph Command Line API¶. id and the command gives "instructing pg x on osd y to repair" seems to be working as intended. Ceph create osd. Legacy BlueStore stats reporting detected on 5 OSD(s) osd. 3e is active+clean+inconsistent, acting [11,17,4] pg 3. Rebooting Object Storage Nodes; 11. 37c 以上命令执行后均未修复,依然报上面的错误,查看相关osd 日志报错如下: 2017-07-24 17:31:10. 把三副本的osd的osd_max_scrubs都先调大,再次使用使用ceph pg repair工具进行数据修复,最后再将osd_max_scrubs调回1. Rebooting Ceph Storage Nodes; 10. In the case of the clay plugin configured with k=8. Before just removing the OSD, we change status of OSD to out and down. Ceph, Gluster and OpenStack Swift are among the most popular and widely used open source distributed storage solutions deployed on the cloud today. Ceph also uses a cluster of monitors to ensure high availability. In the case of the clay plugin configured with k=8, m=4 and d=11 when a single OSD fails, d=11 osds are contacted and 250MiB is downloaded from each of them, resulting in a total download of 11 X 250MiB = 2. It's good for repairing clusters that have broken in a variety of ways. ceph> health HEALTH_ERR 1 nearfull osds, 1 full osds osd. This article describes the metrics that can be configured using the Ceph (ceph Storage Monitoring) probe. # ceph osd pool create newpool 128 128. It is run directly or triggered by ceph-deploy or udev. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. 5:尝试 pg repair,成功. 3T 53% /var/lib/ceph/osd/ceph-141 Go to your datacenter with a new physical drive and replace the drive physically , i assume depending on enterprise server that you are using it should be hot swappable , These days almost all servers support hot swapping of disks , but still you should check for your server model. 7 Replicating from OSD-based to replication across hosts in a ceph cluster. Because of the non raid setup each disk is a osd -> 4 osd's. It returns the HEALTH_ERR full osds message when the cluster reaches the capacity set by the mon_osd_full_ratio parameter. On Thu, Mar 07, 2019 at 07:48. By default, the clay code plugin picks d=k+m-1 as it provides the greatest savings in terms of network bandwidth and disk IO. 5 已经起不来了则:. Ceph decouples the storage software from the underlying hardware. While the underlying filesystem may provide for redundancy, error detection and repair on its own, Ceph implements its own layer of error detection, recovery and n-way replication. Subcommand add add to blacklist (optionally until seconds from now) Usage: ceph osd blacklist add {} Subcommand ls show blacklisted clients Usage: ceph osd blacklist ls Subcommand rm remove from blacklist Usage: ceph osd blacklist rm Subcommand blocked-by prints a histogram of which. 21 legacy statfs reporting detected, suggest to run store repair to get consistent statistic reports osd. Обрабатывает такие состояния PG как replication , recovery , backfilling , rebalancing. The Ceph cluster is built on the basis of distributing the load of the service in multiple nodes where the OSDs, the basic building block of any Ceph cluster, are housed. Source: Nathan Cutler (How to repair a leveldb database). Ceph OSD HDD All servers are fitted with four (old) 1TB 7200 RPM 3. * repair_copy allows client to specify what to copy, like data, xattr and omap, while copy_from copies whatever the src OSD returns.