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From "stack (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 Mon, 20 May 2013 15:55:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13662095#comment-13662095
] 

stack commented on HBASE-8450:
------------------------------

[~lhofhansl] On delete marker never getting deleted, my thinking is that this would not be
the end of the world and second, frequently compactions are promoted to major compaction because
all files are selected so deletes would get purged (The general call is that disabling major
compactions will be overall better than retention of deletes; do you disagree w/ this?). 
On the suggestion that FAST_DIFF slows down scan, let me put up a new patch that does not
enable it; your comment puts it into that bucket of configs that we should change only after
we do some testing.

Let me make a new patch.
                
> 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
>            Assignee: stack
>            Priority: Critical
>             Fix For: 0.95.1
>
>         Attachments: 8450.txt, 8450v2.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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