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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2011/07/08 01:32:16 UTC

[jira] [Commented] (HBASE-4056) Support for using faster storage for write-ahead log

    [ https://issues.apache.org/jira/browse/HBASE-4056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13061672#comment-13061672 ] 

stack commented on HBASE-4056:
------------------------------

Nice idea Praveen.  We should just do this now.  You can have one config refer to another so the wal fs can just refer to the root fs.

> Support for using faster storage for write-ahead log
> ----------------------------------------------------
>
>                 Key: HBASE-4056
>                 URL: https://issues.apache.org/jira/browse/HBASE-4056
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Praveen Kumar
>            Priority: Minor
>              Labels: features
>
> On clusters with heterogeneous storage components like hard drives and flash memory, it could be beneficial to use flash memory for write-ahead log. This can be accomplished by using client side mount table support (HADOOP-7257) that is offered by HDFS federation (HDFS-1052) feature. One can define two HDFS namespaces (faster and slower), and configure HBase to use faster storage namespace for storing WAL.
> This is an abstract task that captures the idea. More brainstorming and subtasks identification to follow.

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