[jira] [Commented] (MESOS-2825) Run heavy disk IO operations at low IO priority

["Jeffrey Schroeder (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MESOS-2825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14740066#comment-14740066 ] 

Jeffrey Schroeder commented on MESOS-2825:
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Out of curiosity, roughly where would the code for this live? I wrote a patch for ossec[1] to do something very similar for low priority cpu bound tasks 8-ish years ago. C++ is not one of my primary programming languages, but I'd be happy to give it a go if it isn't too hard an someone would help me iterate on it.

It very likely isn't much more than calling the ioprio_set(2) syscall in the context that does the heavy IO bits on Linux. No idea if we would want to support this on OS X or Windows. It would also give me an excuse to hack on Mesos.

[1] https://groups.google.com/forum/#!msg/ossec-dev/4fC3r0QyoBw/d9YC7mG58J4J | http://www.digitalprognosis.com/opensource/patches/ossec/ossec-make-syscheckd-use-SCHED_BATCH-on-Linux.patch

> Run heavy disk IO operations at low IO priority
> -----------------------------------------------
>
>                 Key: MESOS-2825
>                 URL: https://issues.apache.org/jira/browse/MESOS-2825
>             Project: Mesos
>          Issue Type: Improvement
>          Components: isolation
>    Affects Versions: 0.23.0
>            Reporter: Ian Downes
>            Assignee: Yan Xu
>            Priority: Minor
>              Labels: twitter
>
> Slave IO operations on large images can be disruptive to tasks, e.g., decompressing, decrypting, hashing, and extracting. Provide option to run such operations at a lower IO priority, i.e., at "idle" or by explicitly setting the "best effort" priority to less than the tasks', e.g., 0 as the lowest best effort priority. All of the existing operations in the Appc provisioner are run as Subprocesses.



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