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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11845) HFile tool should implement Tool, disable blockcache by default
Date Wed, 10 Sep 2014 22:51:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14129293#comment-14129293
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stack commented on HBASE-11845:
-------------------------------

+1 if this works for sure +    conf.setFloat(HConstants.HFILE_BLOCK_CACHE_SIZE_KEY, 0); (it
didn't seem to work for me last night and I was gong to add an explicit flag... it seemed
to disable the LruBC but if the config had bucketcache configured, we'd instantiate that....)

> HFile tool should implement Tool, disable blockcache by default
> ---------------------------------------------------------------
>
>                 Key: HBASE-11845
>                 URL: https://issues.apache.org/jira/browse/HBASE-11845
>             Project: HBase
>          Issue Type: Improvement
>          Components: HFile
>            Reporter: Nick Dimiduk
>            Assignee: Nick Dimiduk
>            Priority: Minor
>             Fix For: 2.0.0, 0.98.7, 0.99.1
>
>         Attachments: HBASE-11845.00-0.98.patch, HBASE-11845.00.patch, HBASE-11845.01-0.98.patch,
HBASE-11845.01.patch
>
>
> I tried using bin/hbase hfile in a memory-constrained environment. It crashed while trying
to instantiate a blockcache. Went to override the configuration and found I couldn't.
> Refactor HFile to remove main(), put implementation entirely in HFilePrettyPrinter. Said
class now extends Configured and implements Tool so configs can be overridden on cli. Also
disabled blockcache by default.



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