[
https://issues.apache.org/jira/browse/HADOOP-13031?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Mingliang Liu reassigned HADOOP-13031:
--------------------------------------
Target Version/s: (was: 3.4.0)
Assignee: (was: Mingliang Liu)
After HADOOP-13032 gets in, let's revisit this.
> Rack-aware read bytes stats should be managed by HFDS specific
> StorageStatistics
> --------------------------------------------------------------------------------
>
> Key: HADOOP-13031
> URL: https://issues.apache.org/jira/browse/HADOOP-13031
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs
> Reporter: Mingliang Liu
> Priority: Major
>
> [HADOOP-13065] added a new interface for retrieving FS and FC Statistics.
> This jira is to refactor the code that maintains rack-aware read metrics to
> use the newly added StorageStatistics. Specially,
> # Rack-aware read bytes metrics is mostly specific to HDFS. For example,
> local file system doesn't need that. We consider to move it from base
> FileSystemStorageStatistics to a dedicated HDFS specific StorageStatistics
> sub-class.
> # We would have to develop an optimized thread-local mechanism to do this, to
> avoid causing a performance regression in HDFS stream performance.
> Optionally, it would be better to simply move this to HDFS's existing
> per-stream {{ReadStatistics}} for now. As [HDFS-9579] states, ReadStatistics
> metrics are only accessible via {{DFSClient}} or {{DFSInputStream}}. Not
> something that application framework such as MR and Tez can get to.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org
For additional commands, e-mail: common-issues-h...@hadoop.apache.org
