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https://issues.apache.org/jira/browse/HBASE-15709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15601006#comment-15601006
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Duo Zhang commented on HBASE-15709:
-----------------------------------
The max packet size is 16MB, but it include the checksum and header, so it
should be a value less than 16MB and depends on the checksum size. I do not
want to compute it so for simple a set 12MB as the limit.
> Handle large edits for asynchronous WAL
> ---------------------------------------
>
> Key: HBASE-15709
> URL: https://issues.apache.org/jira/browse/HBASE-15709
> Project: HBase
> Issue Type: Sub-task
> Components: io, wal
> Affects Versions: 2.0.0
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Critical
> Fix For: 2.0.0
>
> Attachments: HBASE-15709.patch
>
>
> First, FanOutOneBlockAsyncDFSOutput can not work if the buffered data is
> larger than PacketReceiver.MAX_PACKET_SIZE(16MB).
> Second, since we only allow one block here, we need to make sure we do not
> exceed the block size after writing a large chunk of data.
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