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Posted to issues@ozone.apache.org by "Marton Elek (Jira)" <ji...@apache.org> on 2020/02/21 14:20:00 UTC
[jira] [Updated] (HDDS-3053) Decrease the number of the chunk
writer threads
[ https://issues.apache.org/jira/browse/HDDS-3053?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Marton Elek updated HDDS-3053:
------------------------------
Description:
As of now we create 60 threads (
dfs.container.ratis.num.write.chunk.threads) to write chunk data to the disk. As the write is limited by the IO I can't see any benefit to have so many threads. High number of thread means a high context switch overhead, therefore it seems to be more reasonable to use only a limited number of threads.
For example 10 threads should be enough even with 5 external disk.
If you know any reason to keep the number 60, please let me know...
was:
As of now we create 60 threads (
dfs.container.ratis.num.write.chunk.threads) to write chunk date to the disk. As the write is limited by the IO I can't see any benefit to have so many threads. High number of thread means a high context switch overhead, therefore it seems to be more reasonable to use only a limited number of threads.
For example 10 threads should be enough even with 5 external disk.
If you know any reason to keep the number 60, please let me know...
> Decrease the number of the chunk writer threads
> -----------------------------------------------
>
> Key: HDDS-3053
> URL: https://issues.apache.org/jira/browse/HDDS-3053
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Reporter: Marton Elek
> Priority: Major
>
> As of now we create 60 threads (
> dfs.container.ratis.num.write.chunk.threads) to write chunk data to the disk. As the write is limited by the IO I can't see any benefit to have so many threads. High number of thread means a high context switch overhead, therefore it seems to be more reasonable to use only a limited number of threads.
> For example 10 threads should be enough even with 5 external disk.
> If you know any reason to keep the number 60, please let me know...
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