SnapMirror-S3关系中的src和dst分段之间的对象计数增量
适用场景
- SnapMirror-S3 (FabricLink)
- ontap_s3对象存储分段
问题描述
- 在RPO=0的SnapMirror-S3 FabricLink关系中、目标对象存储分段object-count会不断提升、可能远高于源分段的object-count。
- 托管受影响存储分段的聚合会不断填充、空间变得越来越紧或聚合空间不足。
- 或者、从更轻的形式看、SnapMirror-S3关系中源-和目标-分段之间的对象计数仅显示不同的数字、而不显示未完成的工作：
::> vserver object-store-server bucket show -fields object-count
vserver bucket object-count
------- ---------- ------------
svm_dst bucket-dst 124080
svm_src bucket-src 124078
2 entries were displayed.
::> snapmirror show
Progress
Source Destination Mirror Relationship Total Last
Path Type Path State Status Progress Healthy Updated
----------- ---- ------------ ------- -------------- --------- ------- --------
svm_src:/bucket/bucket-src
XDP svm_dst:/bucket/bucket-dst
Snapmirrored
Idle - true -
::*> snapmirror show -instance
Source Path: svm_src:/bucket/bucket-src
Destination Path: svm_dst:/bucket/bucket-dst
Relationship Type: XDP
SnapMirror Policy Type: continuous
SnapMirror Policy: Continuous
Throttle (KB/sec): unlimited
Mirror State: Snapmirrored
Relationship Status: Idle
Relationship ID: 16d619e6-9044-11ed-823e-005056bbfb01
FabricLink Source Role: bucket-src
FabricLink Source Bucket: active-mirror
FabricLink Peer Role: bucket-dst
FabricLink Peer Bucket: active-mirror
FabricLink Topology: 145c48be-9044-11ed-8707-005056bbcabb
FabricLink Pull Byte Count: 0
FabricLink Push Byte Count: 0
FabricLink Pending Work Count: 0
FabricLink Status: ok
- 手动删除源存储分段中的所有对象后、源存储分段或目标存储分段或两者上的对象计数不会降至零、并且部分甚至大部分已占用空间不会释放。
- 深入调查显示、从外部S3客户端执行检查时、目标存储分段中会保留部分多部件对象、例如
aws cli：
$ aws --profile bucket-dst --endpoint-url https://ontap_s3.local s3api list-multipart-uploads --bucket bucket-dst --output text
UPLOADS 2023-01-09T09:57:09.000Z f001 MjE1NTI5NTY5OF8xMDU2XzIzMF80NjgzNzU4Mg
UPLOADS 2023-01-09T10:03:46.000Z f002 MjE1NTI5NTY5N18xMDU1XzE3MV80NjQzNTk2MQ
注意： 如果目标分段已升级(SnapMirror-S3已反转)、则部分多部分对象可以同时保留在源分段和目标分段中。
- 初始化SnapMirror-S3关系时
air.repaired.vplus:notice、ONTAPevent log show(EMS)输出中会报告事件：
Thu Sep 15 09:07:09 +0200 [zbghns4-03: wafl_exempt07: air.repaired.vplus:notice]: AIR vplus rebuild of 1204~0.147527 completed for subtype 6