HDDS-14447. Support multiple clients in OmMetadataGenerator #9696
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sreejasahithi
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sreejasahithi
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Thanks @ivandika3 for working on this , left few comments below
| } | ||
| } | ||
| if (followerOMNodeIds.isEmpty()) { | ||
| throw new IllegalArgumentException("There is no follower the OM service, please retry again"); |
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| throw new IllegalArgumentException("There is no follower the OM service, please retry again"); | |
| throw new IllegalArgumentException("There is no follower in the OM service, please retry again"); |
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| if (clientsNo <= 0) { | ||
| clientsNo = 1; | ||
| } | ||
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| try (OzoneClient ozClient = createOzoneClient(omServiceID, conf)) { | ||
| ensureVolumeAndBucketExist(ozClient, volumeName, bucketName); | ||
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| ozoneClients = new OzoneClient[clientsNo]; |
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The description of "--clients" states that "If the number of clients exceeds number of threads N, only N clients will be created." However, this validation does not seem to be present in the code. Currently we only check if clientsNo <= 0.
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Thanks, updated the description accordingly. Clients can exceed N number of threads for flexibility purpose.
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What changes were proposed in this pull request?
Currently OmMetadataGenerator only creates a single client which is shared by all the threads. This is not suitable to test OM follower read since a single client will only stick with a single OM most of the time. We want to be able to create more clients so that the client workloads will be spread out to all the OM nodes. Also we can support an option to allow clients to initially only connect to OM followers to test follower affinity performance.
We can specify the number of clients needed.
The default number of clients is 1 to preserve compatibility.
What is the link to the Apache JIRA
https://issues.apache.org/jira/browse/HDDS-14447
How was this patch tested?
CI (https://github.com/ivandika3/ozone/actions/runs/21566024816)