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Posted to hdfs-issues@hadoop.apache.org by "Mukul Kumar Singh (JIRA)" <ji...@apache.org> on 2017/11/22 08:52:00 UTC
[jira] [Updated] (HDFS-12853) Ozone: Optimize chunk writes for
Ratis by avoiding double writes
[ https://issues.apache.org/jira/browse/HDFS-12853?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mukul Kumar Singh updated HDFS-12853:
-------------------------------------
Description:
Ozone, in replicated mode writes the data twice, once to the raft log and then to the statemachine.
This results in the data being written twice during a particular chunk write, this is subobtimal. With RATIS-122 the statemachine in Ozone can be optimized by writing the data to the statemachine only once.
was:
Ozone, in replicated mode writes the data twice, once to the raft log and then to the statemachine.
This results in the data being written twice during a particular chunk write, this is subobtimal. With Ratis-122 the statemachine in Ozone can be optimized by writing the data to the statemachine only once.
> Ozone: Optimize chunk writes for Ratis by avoiding double writes
> ----------------------------------------------------------------
>
> Key: HDFS-12853
> URL: https://issues.apache.org/jira/browse/HDFS-12853
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ozone
> Affects Versions: HDFS-7240
> Reporter: Mukul Kumar Singh
> Assignee: Mukul Kumar Singh
> Fix For: HDFS-7240
>
>
> Ozone, in replicated mode writes the data twice, once to the raft log and then to the statemachine.
> This results in the data being written twice during a particular chunk write, this is subobtimal. With RATIS-122 the statemachine in Ozone can be optimized by writing the data to the statemachine only once.
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