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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