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https://issues.apache.org/jira/browse/HDFS-578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12749717#action_12749717
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dhruba borthakur commented on HDFS-578:
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> My current thinking is if the client chooses to use server default for
> blockSize, it should use server defaults for io.bytes.per.checksum and
> dfs.write.packet.size at the same time. What do you think?
Sounds good to me.
> The bytesPerChecksum and and packetSize are always SS
The default value of 512 is suitable for random reads, isn't it? if an
application knows that it does not need random read support for a file, it can
specify the bytesperChecksum to be larger that the default. Don't we want to
allow that flexibility?
> Support for using server default values for blockSize and replication when
> creating a file
> ------------------------------------------------------------------------------------------
>
> Key: HDFS-578
> URL: https://issues.apache.org/jira/browse/HDFS-578
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs client, name-node
> Reporter: Kan Zhang
> Assignee: Kan Zhang
>
> This is a sub-task of HADOOP-4952. This improvement makes it possible for a
> client to specify that it wants to use the server default values for
> blockSize and replication params when creating a file.
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