[lustre-devel] New contributor inquiry – status of LU-1643 (“reserved space” in statfs/df) and guidance requested

[GEORGE ZHAO]

Hi Andreas,

Could you or Simmons send me an invitation to this channel?
https://lustreupstreamclient.slack.com/messages/CAV4QF0ER/
An invitation from the workspace admin is required (James Simmons)

I have a question about how to retrieve data from /proc.
And I'd like to clarify the behavior of "lfs df --stats".

Thanks,
George

On Thu, May 1, 2025 at 1:52 AM Andreas Dilger <adilger at ddn.com> wrote:

> There is a Slack channel, which is linked from wiki.lustre.org "lists"
> page that you can use for simple discussions. Email is probably better for
> complex questions.
>
> Cheers, Andreas
>
> On Apr 30, 2025, at 20:18, GEORGE ZHAO <georgezhaojobs at gmail.com> wrote:
>
> 
> Thank you, Andreas!
> I'm currently looking into LU-7880. Will follow up if I have an
> implementation plan or run into any questions (quite likely).
>
> By the way, should I reach out to the lustre-devel for questions like
> this, or is there a more specific channel?
>
> Thanks!
> George
>
> On Wed, Apr 30, 2025 at 4:44 AM Andreas Dilger <adilger at ddn.com> wrote:
>
>> Hi George,
>> thanks for your interest.  There are definitely a number of open tickets
>> in the "easy" (and "medium") categories that you could work on, though
>> there have been a number of interns and new hires working on those tickets
>> recently and fewer are now available.
>>
>> LU-1643 happens to be the oldest "easy" ticket, but don't let that guide
>> your selection.  I would suggest you take a look through the whole list and
>> pick something that is of interest to you and/or matches your experience
>> level.
>>
>> - LU-16738 <https://jira.whamcloud.com/browse/LU-16738> - Improve
>> mount.lustre with many MGS NIDs
>> <https://jira.whamcloud.com/browse/LU-16738>: this is partly a userspace
>> (mount.lustre) change and partly in the kernel (though not incredibly
>> complex).  This is actually in the "useful" category that provides improved
>> functionality for something that is seen regularly.
>>
>>
>> If you are feeling more adventurous, you might look at one of the
>> "medium" tickets, which may not be too difficult:
>> - LU-7880 <https://jira.whamcloud.com/browse/LU-7880> - add OST/MDT
>> performance statistics to obd_statfs
>> <https://jira.whamcloud.com/browse/LU-7880>:  this is a very useful
>> feature that would allow clients/user applications to probe the IO load on
>> OSTs, and self-optimize checkpoint IO to times when the OSTs are less busy
>> - LU-13123 <https://jira.whamcloud.com/browse/LU-13123> - Add list of
>> client NIDs to job_stats output
>> <https://jira.whamcloud.com/browse/LU-13123>: this would associate all
>> of the clients that are contributing to the job_stats for a specific JobID,
>> and would be useful for debugging and monitoring/
>>
>> On Apr 29, 2025, at 17:41, GEORGE ZHAO <georgezhaojobs at gmail.com> wrote:
>>
>>
>> I'm a storage engineer and a Lustre beginner who just figured out how to
>> deploy it. Did read a lot about it though.
>> My goal is using Lustre to support HPC/ML workload. And I believe doing
>> some tasks would help me proceed better.
>>
>> As wiki suggested, I found an "easy" ticket LU-1643: “Request to remove
>> display of reserved space from statfs (df) total space.”
>> Is it still unclaimed?
>> If it's already in progress, or there's a higher priority issue that
>> could use help, please point me in the right direction.
>>
>> Thanks in advance for any advice.
>>
>> Best regards,
>> George
>> _______________________________________________
>> lustre-devel mailing list
>> lustre-devel at lists.lustre.org
>> http://lists.lustre.org/listinfo.cgi/lustre-devel-lustre.org
>>
>>
>> Cheers, Andreas
>> —
>> Andreas Dilger
>> Lustre Principal Architect
>> Whamcloud/DDN
>>
>>
>>
>>
>>
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