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From "binlijin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8450) Update hbase-default.xml and general recommendations to better suit current hw, h2, experience, etc.
Date Tue, 14 May 2013 01:49:18 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13656628#comment-13656628
] 

binlijin commented on HBASE-8450:
---------------------------------

No, i do not consider this method, according to HBASE-1394 we should have less block transition.
{quote}
Also, when I tested bigger block sizes for the HLogs, I saw that it had detrimental effects
in heavy writes situation because you spend more time writing to each log, meaning that if
you have a slow pipeline it stays slow for a longer amount of time. The overall throughput
is worse.
{quote}
So, we should have muti hlog, if one is slow, use the other one.
                
> Update hbase-default.xml and general recommendations to better suit current hw, h2, experience,
etc.
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-8450
>                 URL: https://issues.apache.org/jira/browse/HBASE-8450
>             Project: HBase
>          Issue Type: Task
>          Components: Usability
>            Reporter: stack
>            Priority: Critical
>             Fix For: 0.95.1
>
>         Attachments: 8450.txt
>
>
> This is a critical task we need to do before we release; review our defaults.
> On cursory review, there are configs in hbase-default.xml that no longer have matching
code; there are some that should be changed because we know better now and others that should
be amended because hardware and deploys are bigger than they used to be.
> We could also move stuff around so that the must-edit stuff is near the top (zk quorum
config. is mid-way down the page) and beef up the descriptions -- especially since these descriptions
shine through in the refguide.
> Lastly, I notice that our tgz does not "include" an hbase-default.xml other than the
one bundled up in the jar.  Maybe we should make it more accessible.

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