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https://issues.apache.org/jira/browse/HDDS-11655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17896108#comment-17896108
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Tsz-wo Sze commented on HDDS-11655:
-----------------------------------
In HDDS-8238, we found that each KeyInfo is ~1.5 KB.
> Prune redundant KeyInfo fields from PurgeDirectories request
> ------------------------------------------------------------
>
> Key: HDDS-11655
> URL: https://issues.apache.org/jira/browse/HDDS-11655
> Project: Apache Ozone
> Issue Type: Improvement
> Reporter: Wei-Chiu Chuang
> Priority: Major
>
> We recently saw a case where OM ratis log exceeded gRPC buffer size limit.
> During investigation, we realized a number of requests have very bloated data
> structures. They were so bloated, Ratis log rolled every 20 seconds. Among
> which, PurgeDirectories is the biggest offender. Using the command
> {code:java}
> ozone debug ratislogparser om --segment-path=<ratislog>
> {code}
> I found the keys to be deleted had a lot of redundant info. Ideally it just
> needed volumeName, bucketName and keyName, but instead, it carried the whole
> KeyInfo object. Adding to this problem is the file ACLs. There appears to be
> no limit to how many ACLs a file can have, and we did see files with hundreds
> of ACLs (that is a separate problem which I will open another jira to track)
> This is one example:
> {noformat}
> (t:1, i:14744), STATEMACHINELOGENTRY, cmdType: PurgeDirectories clientId:
> "client-698E60F7C348" purgeDirectoriesRequest {
> deletedPath { volumeId: 13835058055282163456 bucketId: 9223372036854776064
> deletedDir:
> "/-4611686018427388160/-9223372036854775552/-9223372036854774014/241030230000/-9223372036854653695"
>
> deletedSubFiles { volumeName: "s3v" bucketName:
> "cloudera-health-monitoring-ozone-basic-canary-bucket" keyName:
> ".Trash/cloudera-scm/241030230000/cloudera-health-monitoring-ozone-basic-canary-key"
> dataSize: 63 type: RATIS factor: THREE keyLocationList { version: 0
> keyLocations { blockID { containerBlockID { containerID: 3 localID:
> 113750153625600078 } blockCommitSequenceId: 50 } offset: 0 length: 63
> createVersion: 0 partNumber: 0 } isMultipartKey: false } creationTime:
> 1730325604743 modificationTime: 1730325606257 latestVersion: 0 acls { type:
> USER name: "cloudera-scm" rights: "\200" aclScope: ACCESS } acls { type:
> GROUP name: "cloudera-scm" rights: "\200" aclScope: ACCESS } acls { type:
> GROUP name: "wheel" rights: "\200" aclScope: ACCESS } objectID:
> 9223372036854896897 updateID: 479 parentID: 9223372036854897921 isFile: true
> } ...
> {noformat}
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