[jira] [Created] (HBASE-8541) implement flush-into-stripes in stripe compactions

["Sergey Shelukhin (JIRA)" <ji...@apache.org>]

Sergey Shelukhin created HBASE-8541:
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             Summary: implement flush-into-stripes in stripe compactions
                 Key: HBASE-8541
                 URL: https://issues.apache.org/jira/browse/HBASE-8541
             Project: HBase
          Issue Type: Improvement
            Reporter: Sergey Shelukhin


Flush will be able to flush into multiple files under this design, avoiding L0 I/O amplification.
I have the patch which is missing just one feature - support for concurrent flushes and stripe changes. This can be done via extensive try-locking of stripe changes and flushes, or advisory flags without blocking flushes, dumping conflicting flushes into L0 in case of (very rare) collisions. For file loading for the latter, a form of set cover needs to be solved to determine stripes. That will also address Jimmy's concern of getting rid of metadata. However currently I don't have time for that. I plan to attach the try-locking patch first, but this won't happen for a couple weeks probably and should not block main reviews. Hopefully this will be added on top of main reviews.

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