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https://issues.apache.org/jira/browse/HDDS-9232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17769259#comment-17769259
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Tsz-wo Sze commented on HDDS-9232:
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[~ivanandika], RATIS-1793 is for some error conditions but not the normal case.
For the normal case, we do already have something similar to "follower progress
state". The confs are:
- raft.server.log.appender.buffer.element-limit/byte-limit: limit the
outstanding #entires and total size in appendEntries.
- raft.grpc.server.install_snapshot.request.element-limit: limit the
outstanding install snapshot calls
During snapshot installation, it won't have appendEntries calls.
> Write performance degradation
> -----------------------------
>
> Key: HDDS-9232
> URL: https://issues.apache.org/jira/browse/HDDS-9232
> Project: Apache Ozone
> Issue Type: Bug
> Affects Versions: 1.3.0
> Reporter: Mladjan Gadzic
> Assignee: Tsz-wo Sze
> Priority: Blocker
> Labels: ozone-performance, pull-request-available
>
> It is observed on real cluster using unsecure Ozone HA (3 OMs, 3 SCMs, 3DNs)
> that write performance degraded significantly after Ratis upgrade to 2.5.1
> (https://issues.apache.org/jira/browse/HDDS-8382). At the time of writing
> this ticket, it takes master branch ~25mins for 100k keys to be written,
> while it took 1.3.0 release ~2mins for the same number of keys.
> Test was done using single freon client on OM node. Command
> {code:java}
> ozone freon rk --bufferSize 4096 --factor THREE --keySize 10240
> --numOfVolumes 1 --numOfBuckets 1 --numOfKeys 100000 --numOfThreads 10
> --replication-type RATIS {code}
> was used for that purpose.
> Commit before HDDS-8382, HDDS-8550 (sha
> 290e5f2ba1826a2084c1745e458872dc76c7ae91) did not exhibit degradation in
> write performance.
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