[
https://issues.apache.org/jira/browse/HDFS-1061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12849399#action_12849399
]
dhruba borthakur commented on HDFS-1061:
----------------------------------------
It appears that this proposal is:
48 bits for preferredBlocksize (u.e. max block size is 512 TB)
16 bits for block replication (i.e. max of 64000 replicas of a block)
This scheme should be backward compatible, no existing installations should
have a problem with these settings. Seems like a good proposal to me.
> Memory footprint optimization for INodeFile object.
> ----------------------------------------------------
>
> Key: HDFS-1061
> URL: https://issues.apache.org/jira/browse/HDFS-1061
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Bharath Mundlapudi
> Priority: Minor
> Fix For: 0.22.0
>
>
> I am proposing a footprint optimization to merge blockReplication and
> preferredBlockSize fields into one 'long header' field in INodeFile class.
> This saves 8 bytes per INodeFile object on a 64 bit JVM. This memory
> optimization is transparent and changes are very minimal.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
