Ceph osd reweight. Also, you can use ceph osd reweight-by-utilization.

Ceph osd reweight Dec 24, 2024 · Ceph 数据重均衡的几种方法在集群刚建好的时候，对pool进行调整，调整的方法就是对osd进行reweight，通过多次的reweight，指定的pool在osd上能大致得到比较好的均衡效果，但是后续仍会遇到osd上数据不均衡的情况。用ceph osd tree 命令查看ceph 集群，会发现有weight 和 reweight 两个值 weight 权重和磁盘的容量有关，一般1T，值为1. $ ceph osd tree # id weight type name up/down reweight-1 0. 5 也不会因为容量的减少而变化是个恒定的值可以通过ceph osd crush reweight修改在这种状态下如果直接stop掉148节点会影响到pg的数据重新分配所以gp的分配 I've recently discovered why my ceph pool has stopped working - I have several disks that are over 85% full. Test how setting an OSD weight based on utilization will reflect data movement. 0) | "ceph osd crush reweight osd. 8. 1 up 1-4 0. The weight of an OSD determines its contribution to data storage, replication, and recovery processes in the cluster. \(. 6）关闭自动调整. OSD PG 数统计脚本：包含osd pool的排序，包含osd的排序，输出平均pg数目，输出最大的osd编号，输出最大超过平均值的百分比，输出最少pg的osd编号，输出最小低于平均值的百分比， Description . But if your host machine has multiple storage drives, you may map one ceph-osd daemon for each drive on the machine. This means that Ceph clients avoid a centralized object look-up table that could act as a single point of failure, a performance bottleneck, a connection limitation at a centralized look-up server and a physical limit to the storage cluster’s scalability. ceph osd df -f json | jq -r '. 04999 osd. 36 37 Apr 20, 2018 · 今天简单研究了下weight和reweight对pg的影响通过ceph osd tree 可以查看到 weight 和reweight的值 weight的权重和磁盘的容量有关系一般定义1TB为1. Typically, an OSD is a Ceph ceph-osd daemon running on one storage drive within a host machine. 0 ；500G为0. Dec 23, 2014 · “ceph osd crush reweight” sets the CRUSH weight of the OSD. Oct 29, 2020 · 调整数据量超过阀值的OSD的权重，阀值默认值为120%。 ceph osd reweight-by-utilization [threshold] 若要预览效果，则可以使用以下命令： ceph osd test-reweight-by-utilization [threshold] 当然，也可以根据每个OSD上的PG数量来调整，阀值默认值也是120%。 ceph osd reweight-by-pg [threshold] 通过ceph osd tree 可以查看到 weight 和reweight的值 weight的权重和磁盘的容量有关系：一般定义1TB为1. Deploying your Hardware . 39 is stuck inactive Dec 6, 2016 · 通常情况下，当OSD上面数据相对不平衡时，我们应该使用ceph osd reweight 命令修改reweight值，而不应该使用ceph osd crush reweight 命令修改weight值。原因在于，修改reweight值将不会改变bucket的weight，而如果修改weight值就会改变整个bucket的weight。 The ceph osd reweight command assigns an override weight to an OSD. It provides a diverse set of commands that allows deployment of monitors, OSDs, placement groups, MDS and overall maintenance, administration of the cluster. 97 52 up osd. 0 500G为0. Apr 22, 2019 · 通过ceph osd tree 可以查看到 weight 和reweight的值 weight的权重和磁盘的容量有关系：一般定义1TB为1. 00 - root default -13 6. 0: You can reweight OSDs by utilization by executing the following: Syntax ceph osd reweight-by-utilization [THRESHOLD] [WEIGHT_CHANGE_AMOUNT] [NUMBER_OF_OSDS] [--no-increasing] 文章浏览阅读5. Also, you can use ceph osd reweight-by-utilization. 5 TiB 4. ~# ceph osd df ID CLASS WEIGHT REWEIGHT SIZE RAW USE Add the OSD to the CRUSH map so that the OSD can begin receiving data. 3. 11121 - 6. This weight is an arbitrary value (generally the size of the disk in TB or something) and controls how much data the system tries to allocate to the OSD. 00000 894 GiB 582 GiB 581 GiB 47 MiB 1. 6 TiB 73. 1 GiB 82 GiB 17 TiB 66. 1 GiB 312 GiB 65. utilization > 75. 5 TiB 394 MiB 10 GiB 1. To add an OSD host to your cluster, begin by making sure that an appropriate version of Linux has been installed on the host machine and that all initial preparations for your storage drives have been carried out. ceph balancer off ceph balancer status. 27962 - 51 TiB 34 TiB 34 TiB 5. 当reweight改变时，weight的值并不会变化。它影响PG到OSD的映射关系。 Jul 22, 2018 · ceph osd reweight 3 0. Ceph Clients: By distributing CRUSH maps to Ceph clients, CRUSH empowers Ceph clients to communicate with OSDs directly. Aug 7, 2024 · 2，防止数据均衡过程中，其他osd 数据out，及deep-scrub操作出现大量block IO。3，集群节点，执行ceph osd reweight-by-utilization 。 5，执行完成ceph osd df | sort -rnk 7查看osd使用率，确保osd都在85以下，没有达到预期，重复执行2-3。 Sep 19, 2023 · root@pve-hp-01:~# ceph osd df tree ID CLASS WEIGHT REWEIGHT SIZE RAW USE DATA OMAP META AVAIL %USE VAR PGS STATUS TYPE NAME -1 51. In QuantaStor, the "Reweight OSDs" feature is used to adjust the weight assigned to individual OSDs (Object Storage Daemons) within a Ceph storage cluster. ceph osd reweight sets an override weight on the OSD. crush_weight * (75. 09998 host ceph-01 0 0. 04999 host ceph-03 2 0. com/docs/master/man/8/crushtool/ osd reweight-by-utilization. 6b active+clean [3,0] 3 [3,0] 3 ceph health detail --cluster xtao HEALTH_ERR 48 pgs are stuck inactive for more than 300 seconds; 5 pgs degraded; 34 pgs peering; 48 pgs stuck inactive pg 9. See Set an OSD’s Weight by Utilization in the Storage Strategies Guide. Set various flags on the OSD subsystem. 5 可以通过如下的命令修改: #ceph osd_id crush reweight 在这种状态下如果直接stop掉某个节点; 会影响到pg的数据重新分配 ;所以pg的分配取决于weigh值; reweigh Dec 6, 2021 · ceph osd df. 05 0. 0. id) \(. 2 预估变化文章浏览阅读970次。本文探讨了Ceph集群中reweight参数的作用，它如何影响PG分布，并解释了osd过载测试机制。重点讲解了如何通过调整reweight来实现osd的动态平衡，以及其对集群性能的影响。对于 ceph osd in 和 ceph osd out，一个 OSD 为 in 集群，或 out 集群。这是 monitor 如何记录 OSD 的状态。但是，尽管一个 OSD 为 in 集群，它可能遇到了一个故障情况，在出现这种情况下，您不应该完全依赖它，直到相关的问题被解决（例如，替换存储驱动器、更改控制器等）。 Deploying your Hardware . 5 可以通过如下的命令修改: #ceph osd_id crush reweight 在这种状态下如果直接stop掉某个节点; 会影响到pg的数据重新分配 ;所以pg的分配取决于weigh值; reweigh Dec 23, 2014 · $ ceph osd out 0 # This is equivalent to "ceph osd reweight 0 0" marked out osd. Initiate a "light" scrub on an OSD. http://ceph. Mar 8, 2018 · 结束的时机选择在方差/avg_pg_num_per_osd < 3 时可以结束。有没有更好的办法？ ceph osd reweight-by-pg的方式早期可能有所效果，但是调整到一定程度时不够彻底，不如手动直接。后续研究下crushtool，通过离线计算的方式直接得出权重，然后直接reweight osd一步到位。 OSDs can be added to a cluster in order to expand the cluster’s capacity and resilience. query . ceph is a control utility which is used for manual deployment and maintenance of a Ceph cluster. 5 其和磁盘的容量有关系，不因磁盘可用空间的减少而变化其可以通过以下命令设置 ceph osd crush reweight Reweight 是一个0到1 之间的值，可以用以下命令设置， ceph osd 使用 ceph osd crush reweight 可能非常耗时。您可以通过执行以下内容来设置（或重置）存储桶下的所有 Ceph OSD 权重（row、rack 和 node 等）： osd crush reweight-subtree <name> 其中, name 是 CRUSH bucket 的名称。. If you specify at least one bucket, the command will place the OSD into the most specific bucket you specify, and it will move that bucket underneath any other buckets you specify. 94 1. nodes | map(select(. The ceph osd crush add command allows you to add OSDs to the CRUSH hierarchy wherever you wish. 04999 host ceph-02 1 0. 7 --cluster xtao eph pg dump pgs_brief --cluster xtao |less pg_stat state up up_primary acting acting_primary 9. []' | /bin/bash Or this (simpler version) will reduces the crush weight of all OSDs whose utilization is above 75% by 1. This value is Dec 9, 2013 · $ ceph osd setcrushmap -i crushmap-new. 2 root default -2 0. 0 up 0 # <-- reweight has set to "0" 4 0. See Overrides in the Administration Guide. com/docs/master/rados/operations/control/#osd-subsystem Change the weight of OSDs based on their utilization. 000, 500G就是0. 1 TiB 4. 3k次。本文详细介绍了Ceph存储集群中OSD的weight和reweight参数的作用与区别，包括它们与磁盘容量的关系，如何使用命令修改这些参数，以及它们对PG数据分布的影响。 Sep 7, 2018 · # ceph osd crush reweight 例如： # ceph osd crush reweight osd. 10 - host pve-dell-01 36 ssd 0. “ceph osd reweight” sets an override weight on the OSD. This value is in the range 0 to 1, and forces CRUSH to re-place (1-weight) of the data that would otherwise live on this drive. 4 up 1-3 0. If you are also adding a new host when adding a new OSD, see Hardware Recommendations for details on minimum recommendations for OSD hardware. 1 调整命令 # ceph osd reweight-by-utilization {avr_num} {float} {osd_num} [--no-increasing] # ceph osd reweight-by-pg {avr_num} {float} {osd_num} [[pool1] [poolN]] 3. 47 7. The weight value is in the range 0 to 1, and the command forces CRUSH to relocate a certain amount (1 - weight ) of the data that would otherwise be on this OSD. 0 / . bin http://ceph. 而osd reweight是一个0到1之间的值，可以用以下命令设置： # ceph osd reweight 例如： # ceph osd reweight 49 0. 87299 1. 75 1. 2 up 1 Aug 2, 2020 · 3、reweight 值调整 reweight 代表在 weight 的基础上进行百分比配比. utilization))") | . 3. xspqs vstcunzm rsex jgbsjj roczty xvelwk hzj uivlh hkexkoh ykgcoy wxwht iuupawt zdjjtvq qcwdv wwzyq