[jira] [Created] (HBASE-26969) Eliminate MOB renames when SFT is enabled

["Szabolcs Bukros (Jira)" <ji...@apache.org>]

Szabolcs Bukros created HBASE-26969:
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             Summary: Eliminate MOB renames when SFT is enabled
                 Key: HBASE-26969
                 URL: https://issues.apache.org/jira/browse/HBASE-26969
             Project: HBase
          Issue Type: Task
          Components: mob
    Affects Versions: 2.5.0, 3.0.0-alpha-3
            Reporter: Szabolcs Bukros
            Assignee: Szabolcs Bukros


MOB file compaction and flush still relies on renames even when SFT is enabled.

My proposed changes are:
 * when requireWritingToTmpDirFirst is false during mob flush/compact instead of using the temp writer we should create a different writer using a {color:#000000}StoreFileWriterCreationTracker that writes directly to the mob store folder{color}
 * {color:#000000}these StoreFileWriterCreationTracker should be stored in the MobStore. This would requires us to extend MobStore with a createWriter and a finalizeWriter method to handle this{color}
 * {color:#000000}refactor {color}MobFileCleanerChore to run on the RS instead on Master to allow access to the {color:#000000}StoreFileWriterCreationTracker{color}s to make sure the currently written files are not cleaned up



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