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Umesh Agashe edited comment on HBASE-17437 at 1/9/17 10:43 PM: --------------------------------------------------------------- +1. This will help in FS layout redo (HBASE-14439) work as well. Overall changes look good to me. was (Author: uagashe): +1. This will help in FS redo work as well. Overall changes look good to me. > Support specifying a WAL directory outside of the root directory > ---------------------------------------------------------------- > > Key: HBASE-17437 > URL: https://issues.apache.org/jira/browse/HBASE-17437 > Project: HBase > Issue Type: Improvement > Components: Filesystem Integration, wal > Affects Versions: 1.2.4 > Reporter: Yishan Yang > Assignee: Yishan Yang > Labels: patch > Fix For: 2.0.0, 1.4.0 > > Attachments: hbase-17437-branch-1.2.patch, hbase-17437-master.patch > > > 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). > > This JIRA aims to allow users to configure a log directory (for WALs) that is > outside of the root directory or even in a different FileSystem. The default > value will still put the log directory under the root directory. -- This message was sent by Atlassian JIRA (v6.3.4#6332)