xichen01 commented on PR #7548:
URL: https://github.com/apache/ozone/pull/7548#issuecomment-2543095815
@errose28 Thanks for your questions.
> except that it is expected to run faster because it is only checking block
existence
Yes, it performs better, and in our internal version, with 6 buckets checked
in parallel, the total QPS can be around 70k. And the main bottleneck is OM's
`ListKeys`.
> Could we just add a flag to that command to tell it to only pull block
metadata and accomplish the same result ?
Do you mean we just check the DN Block in RocksDB, not to check the disk
Block file? I think it's possible.
> how does the proposed `headBlock` differ from the existing `getBlock`
request
`headBlock` (which may be called something else) checks a number of Blocks
at a time instead of one, and his return value can be simpler, i.e., it only
returns the Block that is an exception, since it only checks for existence.
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