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Posted to dev@hbase.apache.org by "Yishan Yang (JIRA)" <ji...@apache.org> on 2017/01/06 23:29:58 UTC

[jira] [Created] (HBASE-17437) Support specifying WAL directory to different directory with different file system (For example: S3)

Yishan Yang created HBASE-17437:
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             Summary: Support specifying WAL directory to different directory with different file system (For example: S3)
                 Key: HBASE-17437
                 URL: https://issues.apache.org/jira/browse/HBASE-17437
             Project: HBase
          Issue Type: Bug
    Affects Versions: 1.2.4
            Reporter: Yishan Yang
             Fix For: 2.0.0, 1.2.5


Currently, the WAL and the StoreFiles need to be on the same FileSystem. Some FileSystems (such as Amazon S3) don’t support append or consistent writes. These two properties are imperative for the WAL in order to avoid loss of writes. However, StoreFiles don’t necessarily need the same consistency guarantees (since writes are cached locally and if writes fail, they can always be replayed from the WAL).



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