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From "Erik Holstad (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1562) How to handle the setting of 32 bit versus 64 bit machines
Date Mon, 22 Jun 2009 17:52:07 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12722712#action_12722712
] 

Erik Holstad commented on HBASE-1562:
-------------------------------------

@Stack will play with the System.getProperties(); to see what I can dig out, looks ok, but
need to test on 32 bit machine.

@Purtell looking at the refSize value it looks like this is a 32 bit machine, so might be
need to add some extra checks to the way the arc is figured out. 

> How to handle the setting of 32 bit versus 64 bit machines
> ----------------------------------------------------------
>
>                 Key: HBASE-1562
>                 URL: https://issues.apache.org/jira/browse/HBASE-1562
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.20.0
>            Reporter: Erik Holstad
>            Assignee: Erik Holstad
>             Fix For: 0.20.0
>
>
> After adding the tests to verify the correctness of the HeapSize calculations the question
of where to set the type of machines that are in the cluster arose.
> I would think that most people are using 64 bit machines but we still need to support
the use of 32 bit. So the way I see it we can solve this problem in two ways,
> we can either have a settable parameter the the user sets when starting up the cluster
or we can try to figure it out ourselves. I think that the second solution would
> be the best, to make it as easy as possible on the user. 
> That means that we need to add extra sizes to HeapSize and maybe even to Bytes.
> Thoughts, comments?

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