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Date: Sat, 8 Aug 2009 21:53:15 -0700 (PDT)
From: "Erik Holstad (JIRA)" <jira@apache.org>
To: hbase-dev@hadoop.apache.org
Subject: [jira] Commented: (HBASE-1755) Putting 'Meta' table into ZooKeeper
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    [ https://issues.apache.org/jira/browse/HBASE-1755?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12741022#action_12741022 ] 

Erik Holstad commented on HBASE-1755:
-------------------------------------

Did some small testing to see how a node with a lot of children would be have and what the memory usage would be.
These numbers were produced by running a single ZooKeeper node on my laptop and will be further tested on a bigger cluster
in the beginning  of next week, but just wanted to get some rough numbers.

Inserted 10000 children and it didn't seem to cause any issues. Approximate  memory usage for this insert seemed to be around 6MB, so about 600B/node which seems kinda reasonable when looking at the DataNode.java code in ZooKeeper.


> Putting 'Meta' table into ZooKeeper
> -----------------------------------
>
>                 Key: HBASE-1755
>                 URL: https://issues.apache.org/jira/browse/HBASE-1755
>             Project: Hadoop HBase
>          Issue Type: Improvement
>    Affects Versions: 0.21.0
>            Reporter: Erik Holstad
>             Fix For: 0.21.0
>
>
> Talking at the hackathon about moving the Meta table into ZooKeeper.

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