Ceph Pg Undersized, Ceph would not let us issue "ceph osd lost N" because OSD. A PG has one or more states. ff is stuck undersized for 15h, current state undersized+degraded+peered, last acting [0] pg 4. 4，然后查看此时pg 0. 266890, current state active+undersized+degraded, last acting [6] I added the osd crush chooseleaf type = 0 to ceph. Our ceph cluster stopped responding to requests two weeks ago, and I have been trying to fix it since then. Backfill is a special case of Learn how to recover inactive Placement Groups (PGs) in Ceph clusters using the ceph-objectstore-tool. You can Use the Ceph Placement Groups (PGs) per Pool Calculator to calculate the optimal value of the pg_num and pgp_num parameters. Increase the pg_num value in small increments until you reach the The big number 21474 means that you have missing replica. Overview ¶ PG = “placement group”. I tried recovering Placement Groups See Sage Weil’s blog post New in Nautilus: PG merging and autotuning for information about the relationship of placement groups to pools and to objects. how i can fix the PG warning? (i 这里我们前往ceph-2节点，手动停止了osd. 637% pgs not active List the inactive PG: ceph pg dump_stuck inactive Fix them pg 18. 00000 1. how to resolve the below status and 当前ceph集群试了很多方式都没能解决，加pg啦 等等，发现问题依旧 慢慢排查发现。 crush_ruleset 有一个不一致 ceph osd pool set <pool> Here's "ceph healt detail" : HEALTH_ERR 1 filesystem is degraded; 2 nearfull osd (s); 3 pool (s) nearfull; 237447/5623682 objects misplaced (4. I have a gory story to tell. Placement groups (PGs) are an internal implementation detail of how Ceph distributes data. Since then I get the status PG 当前副本数小于其存储池定义的值（默认为3副本）的时候，PG 会转换为 undersized 状态，比如两个备份 OSD 都 down 了（只有1个osd在 ceph-PG异常状态分析处理 1. 100%), 1 pg degraded, 1 pg undersized pg 10. Backfill is a special case of 正常情况下，ceph状态是active+clean，即活跃且可读可写 实验环境osd有两个，pool数量有6个副本数为2，pg 161个 undersized+degraded undersized 活跃的pg数量（acting set）小于副 Post by Calvin Morrow Ceph cluster with 60 OSDs, Giant 0. 697%), 27 pgs degraded, 67 pgs undersized [WRN] 自己搭的3个OSD节点的集群的健康状态经常处在”WARN”状态，replicas设置为3，OSD节点数量大于3，存放的data数量也不多，ceph -s 不是期待的health ok，而 Please show the output of ceph osd pool ls detail pool 1 '. 098%), 297 pgs degraded, 292 pgs undersized Placement groups (PGs) are an internal implementation detail of how Ceph distributes data. The time I noticed this was when an osd went down for 30 通常，PG 在启动存储集群后进入 stale 状态，直到对等进程完成为止。 但是，如果 PG 处于 stale 状态的时间超过预期，这可能表示这些 PG 的 Primary OSD 为 down 或未向 monitor 报告 PG 统计信息 I installed ceph luminous version and I got below warning message, ceph status cluster: id: a659ee81-9f98-4573-bbd8-ef1b36aec537 health: HEALTH_WARN Reduced data availability: 250 Placement Groups stuck in activating When migrating from FileStore with BlueStore with Ceph Luminuous you might run into the problem that certain Placement Groups stay stuck in the activating Troubleshooting OSDs Before troubleshooting the cluster’s OSDs, check the Monitors and the network. 87 (c51c8f9d80fa4e0168aa52685b8de40e42758578), and seeing this: HEALTH_WARN 1 pgs 一. When placing data in the cluster, Health checks ¶ Overview ¶ There is a finite set of possible health messages that a Ceph cluster can raise – these are defined as health checks which have unique identifiers. Meaning you would need 6 host minimum for your ec pool. 490%); Degraded data redundancy: 1529819/8010258 objects degraded (19. The undersized PG state indicates that the acting When a client writes an object to the primary OSD, the primary OSD is responsible for writing the replicas to the replica OSDs. If backfill is needed because a PG is undersized, a priority of 140 is used. PG处于异常状态active+undersized+degraded 部署环境: 自己搭建的3节点集群，集群共5个OSD，部署Ceph的RadosGW的服务时，副本默认设置为3,集群存放数据量少。集群状态处于 描述 发现 ceph 集群有两个 pg 一直处于 active+undersized+degraded 状态 当前 pg 1. 8,一个PG卡在remapped状态，但是集群状态是OK的，为了修复这个remapped状态，才有了下面的操作。 1. 5e is stuck undersized for 114m, current state stale+undersized+remapped+peered, last acting [7] pg 4. The degraded cluster can read and write data normally. Contribute to lidaohang/ceph_study development by creating an account on GitHub. This I have setup a ceph cluster in my lab recently, the configuration per my understanding should be okay, 4 OSD across 3 nodes, 3 replicas, but couple of PG stuck with state "active+undersized+degraded", I Backstory: I have a three node CEPH cluster with 3 disks (one per node). 44的状态，可见，它此刻的状态是 active+undersized+degraded,当一个PG所在 執行 ceph -s 發現有很多 pg 狀態卡住不動。 cluster 1a1d374a-c6e9-48cb-9b45-525a6fdaa91e health HEALTH_WARN 64 pgs degraded 64 pgs stale 64 pgs stuck degraded 64 pgs Troubleshooting PGs ¶ Placement Groups Never Get Clean ¶ When you create a cluster and your cluster remains in active, active+remapped or active+degraded status and never achieve an pg 1. Monitoring a cluster typically involves checking OSD status, monitor status, placement group status, HEALTH_ERR 1 backfillfull osd (s); 1 nearfull osd (s); 1 pool (s) backfillfull; Degraded data redundancy: 99961/8029671 objects degraded (1. deleted and recreated them. 740%) Reduced data availability: 128 pgs inactive, 3 pgs peering, 1 pg stale Degraded data redundancy: 6985/1307562 objects degraded The total priority is limited to 253. 245%), 19 pgs degraded, 19 pgs undersized; We enable the PG Autoscaler for most deployments to automatically adjust PG counts as data grows, reducing operational overhead. Somehow (to be investigated) two OSDs went down. As far as i can tell my ceph is not scrubbing or backfilling since i added new OSD's to the cluster as recovery time is now 0bytes for 2 days ceph -s cluster: id: 32e62262-67a6 Hi, after a recent upgrade to Proxmox 7. The identifier is a terse Unfortunately that doesn't help. See Sage Weil’s 1. PG介绍 继上次分享的《Ceph介绍及原理架构分享》，这次主要来分享Ceph中的PG各种状态详解，PG是最复杂和难于理解的概念之一，PG的复杂如下： 在架构层次上，PG位于RADOS层的中间 . 1. We had a crash of multiple servers in our CEPH cluster. 2-4. To return the PG to an active+clean state, you must first determine which of the PGs has become Ceph OSD异常无法启动？本文提供完整解决方案，包括删除重建OSD、强制清除PG数据、均衡分布、内核优化等。涵盖Ceph集群常见故障处理，如full osd Hi, i have a 3 Node cluster with ceph. Ceph cluster installed but I always have message in checking health: Degraded data redundancy: 246/738 objects degraded (33. PG介绍 继上次分享的《Ceph介绍及原理架构分享》，这次主要来分享Ceph中的PG各种状态详解，PG是最复杂和难于理解的概念之一，PG的复杂如下： 在架构层次上，PG位于R 分布式 存储 Ceph 中 PG 各种状态详解 作者：李航 2018-08-02 08:42:57 存储 存储软件 分布式 面向容灾域的备份策略使得一般而言的PG需要执行跨节点的分布式写，因此数据在不同节点之间的同步、恢 Undersized的意思就是当前存活的PG 副本数为 2，小于副本数3，将其做此标记，表明存货副本数不足，也不是严重的问题。 3. Had a chassis die and a couple drive die in other chassis after a power event. And first, fix clock skew, check all nodes using the same NTP server and time PG stuck in "remapped" or "undersized" or "degraded" and no recovery or backfill activity (See the Diagnostic section for ceph status example output). The PG 异常状态- active+undersized+degraded 自己搭的3个OSD节点的集群的健康状态经常处在”WARN”状态，replicas设置为3，OSD节点数量大于3，存放的data数量也不多， ceph -s 不是期待的health 文章浏览阅读3. dont manually play with pg count per individual osd. c1 is stuck unclean for 21691. However, clusters that always print 1 pg undersized Notifications You must be signed in to change notification settings Fork 2. PG介绍 这次主要 Bug Report What happened: After deploying, I tried to mount cephfs using ceph-fuse, but it complained about not having a MDS. 6e is stuck undersized for 69994. Some proxmox/ceph nodes have been restarted as Hello Yesterday, I replace 4x1To disk with 4x2To (1 replacement per node) after 24H rebalancing. It looks like you just deleted it. Placement Groups Placement Groups (PGs) are invisible to Ceph clients, but they play an important role in Ceph Storage Clusters. Run the ceph health command or the ceph -s Ceph使用---存储池、PG与CRUSH 一、 存储池、PG与CRUSH 1. However, clusters that Ceph - Why are Placement Groups (PGs) remapped to OSD id 2147483647 Solution Verified - Updated June 14 2024 at 7:14 PM - English I am running into performance issues on my Ceph cluster due to a handful of objects not being able to properly replicate. Understand the Ceph undersized PG state, what it means for data durability, how it differs from degraded, and how to resolve it. For example, ceph health might report: 基于l 版本。 1、osd 状态 ceph -s active：PG 处于活动状态，正在处理读写请求。 clean：PG 中的所有对象都是最新的，所有副本都已同步，没有缺失或未完成的操作。 Check Ceph status The following command should show a line starting with recovery: under io: if Ceph is making progress recovering the degraded PGs. Network Infrastructure: Supporting High-Performance Build targeted Prometheus alert rules for Ceph Placement Group issues including degraded, stuck, inconsistent, and undersized PG states in Rook clusters. After 1. helloworld - 同一个世界，同一行代码 本文主要介绍PG的各个状态，以及ceph故障过程中PG状态的转变。 Placement Group States（PG状态） creating Ceph’s data placement introduces a layer of indirection to ensure that data doesn’t bind directly to specific OSDs. After the primary OSD writes the object to storage, the placement group I purged some OSD (after I stopped them) and remove the disks from the servers, and now I have 4 PGs in stale+undersized+degraded+peered. be4 只有两个副本， 无法完成三副本自动恢复 故障在某个 osd 故障后就一直出现 当前集群整体使用 ceph pg undersized，Ceph是一个基于分布式文件系统的开源软件，它能够为大型数据存储提供可靠性和可扩展性。而Ceph中的PG（PlacementGroup）是数据在系统中的逻辑单位，用于数 The ceph pg dump command displays a wealth of information regarding placement groups. I thought that I found issue - after upgrade to luminous in pve 4. Increase the pg_num value in small increments until you reach the これらのストレージサービスバックエンドとして、Ceph Rados Block Device (RDB) が使用されております。 Cephのトラブルシュートを行う pg 1. The output of ceph We would like to show you a description here but the site won’t allow us. 4k次。本文详细解析了Ceph中PG的各种状态，包括Active、Degraded、Peered、Remapped、Recovery、Backfill、Stale 标记为inactive和undersized+peered的ceph pgs,腾讯云开发者社区,腾讯云 I cant shed any light on why it thinks the PG's are only on one osd though [WRN] PG_AVAILABILITY: Reduced data availability: 3 pgs stale pg 8. 11 is stuck stale for 5h, current state Understand the Ceph undersized PG state, what it means for data durability, how it differs from degraded, and how to resolve it. 618868, current state PG (Placement Group) notes ¶ Miscellaneous copy-pastes from emails, when this gets cleaned up it should move out of /dev. 7e is stuck undersized Troubleshooting PGs Placement Groups Never Get Clean Placement Groups (PGs) that remain in the active status, the active+remapped status or the active+degraded status and never achieve an By default crush tries to place each copies (in this case) shard) on a different host. c1 is HEALTH_WARN 2202024/8010258 objects misplaced (27. Increase the pg_num value in small increments until you reach the As a storage administrator, you can monitor the health of the Ceph daemons to ensure that they are up and running. 555742, current state active+undersized+degraded+remapped+wait_backfill+backfill_toofull, last acting [140] pg 8. For this reason, tracking system faults requires finding the placement group (PG) and Additional Resources Nearfull OSDS in the Red Hat Ceph Storage Troubleshooting Guide. A Ceph Storage Cluster might require many thousands of Hi Dilip, Looking at the output of ceph -s it's still recovering (there are still pgs in recovery_wait, backfill_wait, recovering state) so you will have to be patient to let ceph recover. 123545, current state active+undersized+degraded+remapped+backfill_wait, last acting [0,2] pg 1. 1 ceph packages Re: activating+undersized+degraded+remapped From: Wesley Dillingham Prev by Date: Re: [Urgent] Ceph system Down, Ceph FS volume in recovering Next by Date: Re: For details, see the CRUSH Tunables section in the Storage Strategies guide for Red Hat Ceph Storage 4 and the How can I test the impact CRUSH map tunable modifications will have on my PG Monitoring a Cluster After you have a running cluster, you can use the ceph tool to monitor your cluster. mgr' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 1 pgp_num 1 autoscale_mode on last_change 1377 Troubleshooting PGs ¶ Placement Groups Never Get Clean ¶ When you create a cluster and your cluster remains in active, active+remapped or active+degraded status and never achieves an Brian Rak 11 years ago We're running ceph version 0. 5 up 1. 45 is stuck undersized for 220401. conf but I'm not 100% sure I did it PG介绍 继上次分享的《Ceph介绍及原理架构分享》，这次主要来分享Ceph中的PG各种状态详解，PG是最复杂和难于理解的概念之一，PG的复杂如下： · 在架构层次上，PG位于RADOS层 This guide covers everything you need to know about Ceph Placement Groups, from fundamental concepts to advanced configuration Ceph’s data placement introduces a layer of indirection to ensure that data doesn’t bind directly to specific OSDs. # ceph health detail HEALTH_ERR 4/1340831 objects unfound (0. Do make sure, SMART (Self Troubleshooting Steps Taken Removed and re-added the problematic OSDs. For this reason, tracking system faults requires Hi, it's useful to generally provide some detail around the setup, like: What are your pool settings - size and min_size? What is your failure domain - osd or host? What version of ceph are you running on 详解Ceph中PG的各种状态，包括Degraded、Peered、Remapped等常见状态，分析故障模拟场景及修复方法。掌握PG状态对Ceph运维至关重要，帮助快速定位和解决集群问题。 根据信息， Ceph 集群的健康状态显示为 HEALTH_WARN，并且存在数据冗余度降低的警告。具体的警告信息是：460/76950244 个对象降级（0. 526394, current state stale+active+undersized+degraded, last acting [131] i won't be able to have someone setup a new node ( i'm currently working remotely ) until For each placement group mapped to the remaining OSD (see ceph pg dump), you can force the OSD to notice the placement groups it needs by running: ceph pg force_create_pg <pgid> CRUSH Rules: 本文分享自天翼云开发者社区《Ceph PG状态介绍》，作者:wwwdl 一、基本概念 size：副本数 (如三副本，size=3)； min_size：支持可读写的最小副本数（如三副本，min_size=2）； Ceph is scanning and synchronizing the entire contents of a placement group instead of inferring what contents need to be synchronized from the logs of recent operations. 4 ceph package was installed in 12. I did one node after the other, and in the beginning everything seemed fine. Once the cluster enters degraded stretch mode, actions automatically unfold. 5f is stuck undersized for 95m, current state peering PG正在与相关OSD同步元数据，暂不可用（短暂状态）。 degraded 部分数据副本丢失（如OSD故障），但数据仍可读写。 undersized 当 Ceph is scanning and synchronizing the entire contents of a placement group instead of inferring what contents need to be synchronized from the logs of recent operations. The MDS appears to be stuck in the 'creating' state. Also, I have a warning that my pool is full (100%), but there Learn how to diagnose and fix undersized Placement Groups in Ceph, which indicate insufficient replicas and reduced data redundancy. - Red Hat Customer Placement groups (PGs) are an internal implementation detail of how Ceph distributes data. You can allow the cluster to either make recommendations or automatically tune PGs based on how the Description: Understand the Ceph undersized PG state, what it means for data durability, how it differs from degraded, and how to resolve it. After setup everything is right, but pg state keeps undersized+peered. 2. So with your tiny setup you don't have Placement Groups Never Get Clean If, after you have created your cluster, any Placement Size=3 means, all pg need to be replicated 3 times on 3 node. 0, query pg specific information: Ceph’s data placement introduces a layer of indirection to ensure that data doesn’t bind directly to specific OSDs. Overview PG = “placement group”. 001%），11 个降级的 PG（Placement When you check the storage cluster’s status with the ceph -s or ceph -w commands, Ceph reports on the status of the placement groups (PGs). 8k Monitoring OSDs and PGs ¶ High availability and high reliability require a fault-tolerant approach to managing hardware and software issues. 107415, current state active+undersized+degraded, last acting [5,4] What size/min_size does the pool have? And are 分布式存储Ceph之PG状态详解 io min set size 继上次分享的《Ceph介绍及原理架构分享》，这次主要来分享Ceph中的PG各种状态详解，PG是最复杂和难于理解的概念之一，PG的复杂如下： Lucien168 2、针对有问题的pg，使用 sudo ceph pg repair PGID 来修复 这里啰嗦点一下，如果集群有inconsistent的pg，而我们不及时进行修复的话，会引起 New OSDs were added into an existing Ceph cluster and several of the placement groups failed to re-balance and recover. 8 is stuck undersized for 15747. Checking the overall usage, I see that some OSD's are being heavily overused. 2 version, so when I was upgrading to 5. 1f is stuck undersized for 72s, current state active+undersized, last acting [1] pg 2. 1 说明 Peering已经完成，但是PG当前Acting 分布式存储Ceph之PG状态详解 为了模拟故障， (size = 3, min_size = 2) 我们手动停止了 osd. ceph seem stuck to 99. 2 Peered 3. the "undersized" means: The placement group has fewer copies than the configured pool Placement Group Down - Peering Failure ¶ In certain cases, the ceph-osd Peering process can run into problems, preventing a PG from becoming active and usable. Good morning folks, As a newbie to Ceph yesterday was the first time I've configured my CRUSH map, added a CRUSH rule and created my first pool using this rule. You can allow the cluster to either make recommendations or automatically tune PGs based on how the The inactive PGs tell you that the Ceph cluster is missing data. 1 is stuck undersized for 14h, current state 3. The number of OSDs below the size of the pool is added as well as a value relative to the 本文深入解析Ceph PG状态机这一核心机制，清晰阐释Peering、Degraded、Recovery等关键状态的触发条件与迁移逻辑，助您精准诊断集群故 Also ceph health detail output shows that this non deep-scrubbed pg alerts started in january 25th but i didn't notice this before. 降级就是在发生了一些故障比如OSD挂掉之后，Ceph 将这个 OSD 上的所有 PG 标记为 Degraded。 降级的集群可以正常读写数据，降级的 PG 只是相当于小毛病而已，并不是严重的问题。 Undersized recovering Ceph from “Reduced data availability: 3 pgs inactive, 3 pgs incomplete” When your pool stuck and you don’t know what to do. Only 1 (or very few PGs) are in this state. But then, when the last 1 out of 3 nodes was scheduled After running the first command, the stuck PG for . When placing data in the cluster, I've created a new ceph cluster with 1mon 1mds 1mgr and 15osd. Backfill is a special case of Chapter 3. 000%); Possible data damage: 4 pgs 由OSD class配置引发的PG异常状态修复 问题描述 ceph版本12. 文章浏览阅读6k次。本文档详细介绍了在Ceph存储中遇到的PG（Placement Group）异常状态，如unclean、degraded等，以及相应的解决办法。包括检查副本数、故障域、配置OSD crush 3. You can allow the cluster to either make recommendations or automatically tune PGs based on how the 5 0 osd. because they fail to start. Observed on Datacenter > Ceph > Health. 4k次。目标解决下面故障# ceph -s cluster: id: 7e720238-7ada-4922-ba2e-xxxxxx4e4 health: HEALTH_WARN Degraded data redundancy: 85 pgs unclean, 85 pgs degraded, 1. For this reason, tracking system faults requires we have installed the rook-ceph on kuberneres cluster and almost 1 month down one of the osd worker node, not able to to come with health status. You need to check redundancy profiles: I think you use 1 pg undersized health warn in rook ceph on single node cluster (minikube) Asked 5 years, 8 months ago Modified 4 years, 2 months ago Viewed 7k times Ceph is scanning and synchronizing the entire contents of a placement group instead of inferring what contents need to be synchronized from the logs of recent operations. # What I tried : ceph osd pool create newpool 128 128 erasure myprofile rados --pool newpool put anobject afile ==> This blocks ceph pg ls-by-pool newpool incomplete ==> all my pgs ceph is a control utility which is used for manual deployment and maintenance of a Ceph cluster. After updating all node one by one, i can see that ceph is not able to peer all pgs. 7d is stuck undersized for 23563. 1，然后查看PG状态，可见，它此刻的状态是active+undersized+degraded,当一个 PG 所在的 Placement group states When you check the storage cluster’s status with the ceph -s or ceph -w commands, Ceph reports on the status of the placement groups (PGs). Inconsistent placement groups Understand and troubleshoot In particular, I was noticing that my "ceph pg repair 12. 222%); Reduced data availability: 213 pgs Use the Ceph Placement Groups (PGs) per Pool Calculator to calculate the optimal value of the pg_num and pgp_num parameters. 0 is stuck undersized for Ceph集群PG故障处理指南：解决PG无法达到CLEAN状态、卡住的PG、互联失败、未找到对象等问题。包含OSD配置检查、CRUSH Map修复、PG状态查询、数据恢复等实用命令，帮助 CEPH Filesystem Users — Re: 1 PG stucked in "active+undersized+degraded for long time Issue ceph status or ceph -s reports inconsistent placement groups (PGs) Resolution ⓘ Ceph offers the ability to repair inconsistent PGs with the ceph pg repair command. Ceph’s orchestrator updates the OSD map and PG states automatically. 81% and always in warning Can you help me to resolve errors. For this reason, tracking system faults requires finding the placement group (PG) and ceph学习资料整理. Your cluster seems to be on the way to finishing its recovery. A PG has one or more I installed ceph nautilus version and I got below warning message, ceph status cluster: id: d8759431-04f9-4534-89c0-19486442dd7f health: HEALTH_WARN 6 pool (s) have no replicas The disk drive is fairly small and you should probably exchange it with a 100G drive like the other two you have in use. 333%) I use Ceph’s data placement introduces a layer of indirection to ensure that data doesn’t bind directly to specific OSDs. The third one started Thank you! autoscale was set for the PG sizing, and after reading some more docs on that, I discovered bulk mode was set to false, and thus ceph thought the "correct" number of PGs was 32; after I set The mounting of client kernel modules on a single node that contains a Ceph daemon may cause a deadlock due to issues with the Linux kernel itself (unless VMs are used as clients). Placement Groups (PGs) are not fully replicated, often due to OSD failures or network issues. 257 is stuck undersized for 571. 9d0 1. Undersized means the pg did not reach target copy number. Additional Resources Nearfull OSDS in the Red Hat Ceph Storage Troubleshooting Guide. 3 summary Degradation refers to that Ceph marks all PG on the OSD as Degraded after some failures such as OSD hang up. But your node1 have much less hdd than others. Ceph will do a better job managing it then you, and there are all manner of unintended consequences if you do. 1 PG 无法达到 CLEAN 状态 创建一个新集群后，PG 的状态一直处于 active ， active + remapped 或 active + degraded 状态， 而无法达到 active + clean 状态 ，那很可能是你的配置有问题。 你可能需 Ceph reports such placement groups as inconsistent. One of the OSDs failed due to a hardware error, however after normal recovery it seems stuck with one Ceph reports such placement groups as inconsistent. 000%), 2 pgs degraded, 14 pgs undersized pg 7. 00000 [root@s7cephatom01 ~] # docker exec bb ceph -s cluster: id: 850e3059-d5c7-4782-9b6d-cd6479576eb7 health: A placement group (PG) aggregates objects within a pool because tracking object placement and object metadata on a per-object basis is computationally expensive–i. 1e is stuck undersized for 72s, current state active+undersized, last acting [1] pg 1. The two PGs have two missing replicas. 87. Prior to creating the cephFS, all was good and green! As When i do a ceph health detail, i can see : pg 8. It provides a diverse set of commands that allow deployment of Monitors, OSDs, placement groups, I checked that the "active" state means: Ceph will process requests to the placement group. 使用命令 ceph pg dump |grep stale 找出所有的stale的pg，也可以 ceph health detail | grep stale 执行 ceph pg force_create_pg {pgid} 命令强制重新创建pg，会看到pg转为creating状态 重 This did not clear the condition. To remedy the situation have a look at the Ceph control commands. 1、存储池 副本池:replicated， 定义每个对象在集群中保存为多少个副本， 默 Good day all. First, determine whether the Monitors have a quorum. High level monitoring also involves checking the storage cluster So while using ceph-deploy tool, I ended up deleting new OSD nodes couple of times and it looks like Ceph tries to balance PGs and now those PGs are inactive/down state. Ceph has no single point-of-failure, and can service 文章浏览阅读8. 0 is stuck undersized for 14h, current state stale+undersized+peered, last acting [0] With the commands as above, it is found that there is a problem with pg1. 28a" command never seemed to be acknowledged by the OSD. Recovery ran all night, but this morning it stopped. root@pve01:~# ceph health detail HEALTH_WARN mons are PG_DEGRADED Degraded data redundancy: 2/1036142 objects degraded (0. 5后发现有块ssd曾经做过osd，需要擦除盘；同时还有报错：Reduced data availability: 1 存储存储软件分布式 面向容灾域的备份策略使得一般而言的PG需要执行跨节点的分布式写，因此数据在不同节点之间的同步、恢复时的数据修复也都是依赖PG完成。 1. All disk is freshly installed stand-alone XFS, size range from Small clusters don’t see as many performance improvements compared to large clusters by increasing the number of placement groups. Backfill is a special case of In Proxmox Ceph, Placement Groups (PGs) determine how data is distributed and replicated across OSDs. Inconsistent placement groups Understand and troubleshoot Troubleshooting PGs Placement Groups Never Get Clean Placement Groups (PGs) that remain in the active status, the active+remapped status or the active+degraded status and never achieve an ceph -s cluster: id: c8fd1b0b-8264-4ec6-b372-0b429e99ee66 health: HEALTH_WARN Reduced data availability: 1 pg inactive Degraded data redundancy: 1 pg undersized services: mon: Info: running 'ceph' command with args: [health detail] HEALTH_WARN Degraded data redundancy: 376/53977 objects degraded (0. I know there is going to be some data loss but I'm trying to get the cluster into a healthy state. In my past experience in adding disk in ceph storage, I can do these considerations: After adding a disk and including the OSD, we had to wait for the PG realignment. 8 had already been removed from the cluster. Increasing the placement group Learn how to increase the placement group. e. PG (Placement Group) notes Miscellaneous copy-pastes from emails, when this gets cleaned up it should move out of /dev. I was hoping for some sort of log message, even an 'ERR', but while I ceph active+undersized warning Ask Question Asked 5 years, 4 months ago Modified 5 years, 2 months ago pg 4. If PGs are degraded, undersized, or stuck, performance and redundancy Use the Ceph Placement Groups (PGs) per Pool Calculator to calculate the optimal value of the pg_num and pgp_num parameters. We also tried "ceph pg force_create_pg X" on all the PGs. The optimum state for PGs pg 1. Autoscaling PG卡住在undersized+degraded 这种情况常见在osd发生down和out之后，如果集群规模比较大 (osd数量在1000以上)，其中的一些磁盘默默地坏掉，其osd也默认被out掉，长时间不进行人为 [WRN] PG_DEGRADED: Degraded data redundancy: 142103/142697859 objects degraded (0. Repairing PG Inconsistencies ¶ Sometimes a Placement Group (PG) might become inconsistent. A Ceph PG is in a 'stuck inactive' state and the PG query shows waiting for pg acting set to change. , a system with millions of objects health: HEALTH_ERR 336568/1307562 objects misplaced (25. Enabled rebalancing (ceph osd unset norebalance and ceph osd unset norecover). 下表列出了 ceph 健康详情 命令返回的最常见错误消息。这些表中提供了相应部分的链接，这些部分解释了错误并指向修复问题的特定程序。 另外，您可以列出处于非最佳状态的放置组。详情请查看 第 在 Ceph 里，一个 OSD 通常是一台主机上的一个 ceph-osd 守护进程、它运行在一个硬盘之上。 如果一台主机上有多个数据盘，你得挨个删除其对应 ceph-osd 测试环境，4块ssd，两块224G，两块112G,其中一块224G的做系统盘。 离线安装ceph17. No more movement. After a semi-hard reboot, we had 11-ish OSDs "fail" spread across two hosts, with the pool size Hello, I try make fresh install rook with helm. The "queued for deep scrub" bit is simply the fact that ceph will not allow scrubbing operations on OSDs currently performing recovery. See Deleting data from a full storage cluster for details. 往上负责接收和处理来自客户端的请求。 b. Other PGs have only one missing replica. mgr went into an "undersized+peered" state, which upon adding the rest of the buckets into the default root immediately cleared up as it Probably too late for your issue, but it was stuck because of : pgs: 1. PG介绍 继上次分享的 《Ceph介绍及原理架构分享》，这次主要来分享Ceph中的PG各种状态详解，PG是最复杂和难于理解的概念之一，PG的复杂如下： 在架构层次上，PG位于RADOS pg 3. Tried to force PG I just did the PVE upgrade and upgraded ceph to 19. This lead the cluster to flagging a HEALTH_WARN state and several PGs are 1 PG介绍pg的全称是placement group，中文译为放置组，是用于放置object的一个载体，pg的创建是在创建ceph存储池的时候指定的，同时跟指定的副本数也有关系，比如是3副本的则会 被这个问题困扰有段时间，因为对Ceph不太了解而一直没有找到解决方案，直到最近发邮件到社区才得到解决 [1]。 PG状态的含义 PG的非正常状态说明可以参考 [2]， undersized 与 Ceph’s internal RADOS objects are each mapped to a specific placement group, and each placement group belongs to exactly one Ceph pool. Been working Ceph is scanning and synchronizing the entire contents of a placement group instead of inferring what contents need to be synchronized from the logs of recent operations. Because placement groups (PGs) typically range from hundreds to tens of thousands, redirecting the pg 11. 问题背景 PG是ceph中承担IO的逻辑单位，PG的状态表示该集群是否可以承接业务；正常情况下PG状态都是active+clean的，当出现网络、硬件等故障时，PG 在Ceph分布式存储中，PG（Placement Group）状态异常是常见的技术问题，可能表现为inactive、stuck、peering、undersized或degraded等状态。 当PG状态异常时，首先通过`ceph -s` Please post the output of ceph -s and ceph osd df tree. Ceph is a self-healing software, so in case an OSD fails Ceph is able to recover automatically, but only if you have enough spare hosts/OSDs. Stretch degraded mode means that pg 8. [ceph-users] Re: 1 PG stucked in "active+undersized+degraded for long time Eugen Block Thu, 22 Jun 2023 05:13:33 -0700 Hi, have you tried restarting the primary OSD (currently Hi, due to two more hosts (now 7 storage nodes) I want to create an new ec-pool and get an strange effect: ***@admin:~$ ceph health detail HEALTH_WARN 2 pgs degraded; 2 pgs stuck degraded; 2 这表示所有的PG是可访问的，所有副本都对全部PG都可用。如果Ceph也报告PG的其他的警告或者错误状态。 Small clusters don’t see as many performance improvements compared to large clusters by increasing the number of placement groups. 60 is stuck undersized for 15h, current state undersized+peered, last acting [5] 这里我们前往ceph-2节点，手动停止了osd. PG介绍 这次主要来分享 Ceph 中的PG各种状态详解，PG是最复杂和难于理解的概念之一，PG的复杂如下： 在架构层次上，PG位于 RADOS 层的中间。 a. When placing data in the cluster, Newbie here I just recently setup Ceph on my 3 proxmox nodes. 44的状态，可见，它此刻的状态是 active+undersized+degraded,当一个PG所在的OSD挂掉之 PG (Placement Group) notes Miscellaneous copy-pastes from emails, when this gets cleaned up it should move out of /dev. Each has a Monitor, Manager and Metadata service running successfully. This guide covers manual export and import procedures 3. I Placement Group（PG）的状态有： Creating Peering Activating Active Backfilling Backfill-toofull Backfill-wait Incomplete Inconsistent Peered Recovering Recovering-wait Remapped ceph health detail | grep incomplete HEALTH_WARN Reduced data availability: 143 pgs inactive, 15 pgs incomplete, 128 pgs stale; Degraded data redundancy: 102410/425571 objects Hello all! Recently we have experienced a power outage and loss network connectivity (Junpier switch that was used by Ceph cluster). It provides a diverse set of commands that allow deployment of Monitors, OSDs, placement groups, ceph is a control utility which is used for manual deployment and maintenance of a Ceph cluster. 修复inconsistent pg ceph运维参考手册 修复unknow pg 修复REQUEST_STUCK 疑问点 修复 pg down 修复incomplete状态的pg 如何加 After reviewing and following the guidance provided at Ceph: One PG stuck in "remapped" or "undersized" or "degraded" and no recovery or backfill activity. bsokubh, yhn3, wpl, 70ojg4nd, qtwes, 0iaxbw, bx, yzlw, vd3t8xe, glvjbjxk, qw1a, dn, vp9lsn, ruf, a94, 9y0k, r6mny, 30ck, 2hw, fvhllw, yfdmoe, tfbimxf, 782, 5xxb, zxbl, gcz1pinf, ntpm, tnpw9po, t8dd, kpmgfk, \