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Date: Tue, 13 Jan 2015 23:35:35 +0000 (UTC)
From: "Sean Busbey (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12767199.1421170693000.76217.1421192135314@Atlassian.JIRA>
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Subject: [jira] [Commented] (HBASE-12848) Utilize Flash storage for WAL
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    [ https://issues.apache.org/jira/browse/HBASE-12848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14276197#comment-14276197 ] 

Sean Busbey commented on HBASE-12848:
-------------------------------------

+1. one nit left, fix on push fine by me.

{code}
+  /*
+   * Sets storage policy for given path according to config setting
+   * @param fs
+   * @param conf
+   * @param path the Path whose storage policy is to be set
+   * @param policyKey
+   * @param defaultPolicy
+   */
{code}

nit: leave off the @param javadocs for everything except path since they don't add any information.

> Utilize Flash storage for WAL
> -----------------------------
>
>                 Key: HBASE-12848
>                 URL: https://issues.apache.org/jira/browse/HBASE-12848
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 2.0.0, 1.1.0
>
>         Attachments: 12848-v1.patch, 12848-v2.patch, 12848-v3.patch
>
>
> One way to improve data ingestion rate is to make use of Flash storage.
> HDFS is doing the heavy lifting - see HDFS-7228.
> We assume an environment where:
> 1. Some servers have a mix of flash, e.g. 2 flash drives and 4 traditional drives.
> 2. Some servers have all traditional storage.
> 3. RegionServers are deployed on both profiles within one HBase cluster.
> This JIRA allows WAL to be managed on flash in a mixed-profile environment.


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