Lustre devel - May 2013 - Interested in contributing to Lustre

Hi all,

I am a grad student at Carnegie Mellon University. I had my course work in
advanced storage systems in previous semester, and I am interested to work
on Lustre. I prefer to take up a project that could be completed in a
duration of a month or two.

Since I am a novice w.r.t. my familiarity with Lustre code base, I seek
your opinion to choose a project from the list:
http://wiki.lustre.org/index.php/Lustre_Project_List

My preferences (in order) are:
1. fallocate() API - https://bugzilla.lustre.org/show_bug.cgi?id=15064
2. kernel patch removal - https://bugzilla.lustre.org/show_bug.cgi?id=21524
3. ioctl() number cleanups -
https://bugzilla.lustre.org/show_bug.cgi?id=20731
I am also open to other suggestion.

Any suggestions regarding code walkthrough or documentation to help
ramping up are also welcome.

Thanks,
Tejas Wanjari

I wish you luck in your endeavour!

Here are some links which might prove useful to you:

 * https://jira.hpdd.intel.com - New issues are opened here

 * http://review.whamcloud.com - New patches are reviewed here

 * https://wiki.hpdd.intel.com/display/PUB/Submitting+Changes - Some
   info on the development cycle used by the Lustre project.

Unfortunately, there isn''t nearly enough documentation as there should
be in the Lustre tree (especially for new comers), so feel free to ask
questions.

As far as potential projects, in my opinion, the project list you
linked to is a bit dated. There are *many* open issues which need to be
fixed, so I would suggest finding something that interests you on the
JIRA bug tracker that I linked to above, since that is a more up to date
source of information.

If you are completely new, a good place to start is just downloading the
git tree, building, and running the unit tests locally to get familiar
with the project. Then you can start to modify the source and explore
some of the areas that interest you.

-- 
Cheers, Prakash

On Fri, May 10, 2013 at 06:03:27PM -0400, twanjari at andrew.cmu.edu
wrote:
> Hi all,
> 
> I am a grad student at Carnegie Mellon University. I had my course work in
> advanced storage systems in previous semester, and I am interested to work
> on Lustre. I prefer to take up a project that could be completed in a
> duration of a month or two.
> 
> Since I am a novice w.r.t. my familiarity with Lustre code base, I seek
> your opinion to choose a project from the list:
> http://wiki.lustre.org/index.php/Lustre_Project_List
> 
> My preferences (in order) are:
> 1. fallocate() API - https://bugzilla.lustre.org/show_bug.cgi?id=15064
> 2. kernel patch removal - https://bugzilla.lustre.org/show_bug.cgi?id=21524
> 3. ioctl() number cleanups -
> https://bugzilla.lustre.org/show_bug.cgi?id=20731
> I am also open to other suggestion.
> 
> Any suggestions regarding code walkthrough or documentation to help
> ramping up are also welcome.
> 
> Thanks,
> Tejas Wanjari
> 
> _______________________________________________
> Lustre-devel mailing list
> Lustre-devel at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-devel

On 2013-05-13, at 12:44, "twanjari at andrew.cmu.edu<mailto:twanjari at
andrew.cmu.edu>" <twanjari at andrew.cmu.edu<mailto:twanjari at
andrew.cmu.edu>> wrote:
I am a grad student at Carnegie Mellon University. I had my course work in
advanced storage systems in previous semester, and I am interested to work
on Lustre. I prefer to take up a project that could be completed in a
duration of a month or two.

Since I am a novice w.r.t. my familiarity with Lustre code base, I seek
your opinion to choose a project from the list:
http://wiki.lustre.org/index.php/Lustre_Project_List

A more up-to-date list is at:
https://wiki.hpdd.intel.com/display/PUB/Project+Ideas

My preferences (in order) are:
1. fallocate() API - https://bugzilla.lustre.org/show_bug.cgi?id=15064

This one is a bit tricky, but benefits an increasing number of users and would
be the most "filesystem-y" of the listed projects. Bonus marks if you
tie this in with the Lustre MPIIO-ADIO driver.

2. kernel patch removal - https://bugzilla.lustre.org/show_bug.cgi?id=21524

The main project here is to replace the "dev-read-only" patch with
hooks into the "dm-flakey" driver or similar, that accepts reads, but
does not write anything to disk. It is partly Lustre and partly in the kernel.

3. ioctl() number cleanups -
https://bugzilla.lustre.org/show_bug.cgi?id=20731

This would help to get Lustre into the upstream kernel, but is not necessarily
going to get you distributed filesystem experience.

I am also open to other suggestion.

Any suggestions regarding code walkthrough or documentation to help
ramping up are also welcome.

Thanks,
Tejas Wanjari

_______________________________________________
Lustre-devel mailing list
Lustre-devel at lists.lustre.org<mailto:Lustre-devel at lists.lustre.org>
http://lists.lustre.org/mailman/listinfo/lustre-devel

Additionally there''s this pretty good (though stale in many parts now,
but still some other parts are ok and high level is certainly ok)
Lustre internals book: users.nccs.gov/~fwang2/papers/lustre_report.pdf?

On May 13, 2013, at 5:34 PM, Prakash Surya wrote:
> I wish you luck in your endeavour!
> 
> Here are some links which might prove useful to you:
> 
> * https://jira.hpdd.intel.com - New issues are opened here
> 
> * http://review.whamcloud.com - New patches are reviewed here
> 
> * https://wiki.hpdd.intel.com/display/PUB/Submitting+Changes - Some
>   info on the development cycle used by the Lustre project.
> 
> Unfortunately, there isn''t nearly enough documentation as there
should
> be in the Lustre tree (especially for new comers), so feel free to ask
> questions.
> 
> As far as potential projects, in my opinion, the project list you
> linked to is a bit dated. There are *many* open issues which need to be
> fixed, so I would suggest finding something that interests you on the
> JIRA bug tracker that I linked to above, since that is a more up to date
> source of information.
> 
> If you are completely new, a good place to start is just downloading the
> git tree, building, and running the unit tests locally to get familiar
> with the project. Then you can start to modify the source and explore
> some of the areas that interest you.
> 
> -- 
> Cheers, Prakash
> 
> On Fri, May 10, 2013 at 06:03:27PM -0400, twanjari at andrew.cmu.edu wrote:
>> Hi all,
>> 
>> I am a grad student at Carnegie Mellon University. I had my course work
in
>> advanced storage systems in previous semester, and I am interested to
work
>> on Lustre. I prefer to take up a project that could be completed in a
>> duration of a month or two.
>> 
>> Since I am a novice w.r.t. my familiarity with Lustre code base, I seek
>> your opinion to choose a project from the list:
>> http://wiki.lustre.org/index.php/Lustre_Project_List
>> 
>> My preferences (in order) are:
>> 1. fallocate() API - https://bugzilla.lustre.org/show_bug.cgi?id=15064
>> 2. kernel patch removal -
https://bugzilla.lustre.org/show_bug.cgi?id=21524
>> 3. ioctl() number cleanups -
>> https://bugzilla.lustre.org/show_bug.cgi?id=20731
>> I am also open to other suggestion.
>> 
>> Any suggestions regarding code walkthrough or documentation to help
>> ramping up are also welcome.
>> 
>> Thanks,
>> Tejas Wanjari
>> 
>> _______________________________________________
>> Lustre-devel mailing list
>> Lustre-devel at lists.lustre.org
>> http://lists.lustre.org/mailman/listinfo/lustre-devel
> _______________________________________________
> Lustre-devel mailing list
> Lustre-devel at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-devel

Tejas,

In addition to the Lustre_Project_List at wiki.lustre.org, there is
another project list at
https://wiki.hpdd.intel.com/display/PUB/Project+Ideas.

Thanks,
-Cory


On 5/10/13 5:03 PM, "twanjari at andrew.cmu.edu" <twanjari at
andrew.cmu.edu>
wrote:
>Hi all,
>
>I am a grad student at Carnegie Mellon University. I had my course work in
>advanced storage systems in previous semester, and I am interested to work
>on Lustre. I prefer to take up a project that could be completed in a
>duration of a month or two.
>
>Since I am a novice w.r.t. my familiarity with Lustre code base, I seek
>your opinion to choose a project from the list:
>http://wiki.lustre.org/index.php/Lustre_Project_List
>
>My preferences (in order) are:
>1. fallocate() API - https://bugzilla.lustre.org/show_bug.cgi?id=15064
>2. kernel patch removal -
>https://bugzilla.lustre.org/show_bug.cgi?id=21524
>3. ioctl() number cleanups -
>https://bugzilla.lustre.org/show_bug.cgi?id=20731
>I am also open to other suggestion.
>
>Any suggestions regarding code walkthrough or documentation to help
>ramping up are also welcome.
>
>Thanks,
>Tejas Wanjari
>
>_______________________________________________
>Lustre-devel mailing list
>Lustre-devel at lists.lustre.org
>http://lists.lustre.org/mailman/listinfo/lustre-devel

Same disclaimer applies for http://wiki.lustre.org/lid/agi/agi.html.

The OpenSFS CDWG has discussed bringing these documents up-to-date.
Nothing concrete yet though.

Thanks,
-Cory


On 5/14/13 1:49 AM, "Drokin, Oleg" <oleg.drokin at intel.com>
wrote:
>Additionally there''s this pretty good (though stale in many parts
now,
>but still some other parts are ok and high level is certainly ok)
>Lustre internals book: users.nccs.gov/~fwang2/papers/lustre_report.pdf?
>
>On May 13, 2013, at 5:34 PM, Prakash Surya wrote:
>
>> I wish you luck in your endeavour!
>> 
>> Here are some links which might prove useful to you:
>> 
>> * https://jira.hpdd.intel.com - New issues are opened here
>> 
>> * http://review.whamcloud.com - New patches are reviewed here
>> 
>> * https://wiki.hpdd.intel.com/display/PUB/Submitting+Changes - Some
>>   info on the development cycle used by the Lustre project.
>> 
>> Unfortunately, there isn''t nearly enough documentation as
there should
>> be in the Lustre tree (especially for new comers), so feel free to ask
>> questions.
>> 
>> As far as potential projects, in my opinion, the project list you
>> linked to is a bit dated. There are *many* open issues which need to be
>> fixed, so I would suggest finding something that interests you on the
>> JIRA bug tracker that I linked to above, since that is a more up to
date
>> source of information.
>> 
>> If you are completely new, a good place to start is just downloading
the
>> git tree, building, and running the unit tests locally to get familiar
>> with the project. Then you can start to modify the source and explore
>> some of the areas that interest you.
>> 
>> -- 
>> Cheers, Prakash
>> 
>> On Fri, May 10, 2013 at 06:03:27PM -0400, twanjari at andrew.cmu.edu
wrote:
>>> Hi all,
>>> 
>>> I am a grad student at Carnegie Mellon University. I had my course
>>>work in
>>> advanced storage systems in previous semester, and I am interested
to
>>>work
>>> on Lustre. I prefer to take up a project that could be completed in
a
>>> duration of a month or two.
>>> 
>>> Since I am a novice w.r.t. my familiarity with Lustre code base, I
seek
>>> your opinion to choose a project from the list:
>>> http://wiki.lustre.org/index.php/Lustre_Project_List
>>> 
>>> My preferences (in order) are:
>>> 1. fallocate() API -
https://bugzilla.lustre.org/show_bug.cgi?id=15064
>>> 2. kernel patch removal -
>>>https://bugzilla.lustre.org/show_bug.cgi?id=21524
>>> 3. ioctl() number cleanups -
>>> https://bugzilla.lustre.org/show_bug.cgi?id=20731
>>> I am also open to other suggestion.
>>> 
>>> Any suggestions regarding code walkthrough or documentation to help
>>> ramping up are also welcome.
>>> 
>>> Thanks,
>>> Tejas Wanjari
>>> 
>>> _______________________________________________
>>> Lustre-devel mailing list
>>> Lustre-devel at lists.lustre.org
>>> http://lists.lustre.org/mailman/listinfo/lustre-devel
>> _______________________________________________
>> Lustre-devel mailing list
>> Lustre-devel at lists.lustre.org
>> http://lists.lustre.org/mailman/listinfo/lustre-devel
>
>_______________________________________________
>Lustre-devel mailing list
>Lustre-devel at lists.lustre.org
>http://lists.lustre.org/mailman/listinfo/lustre-devel

In addition to the document Oleg has pointed out (which imho is probably
the best resource for a newcomer developer to start with), and the link
that Cory has provided which also includes documentation on some more
recent additions to the source (and is also a good source of information
for newcomers imo), some older HLDs can be found at
http://wiki.lustre.org/index.php/Architecture_-_Lustre_HLDs, and some newer
HLDs/architectural docs at
https://wiki.hpdd.intel.com/display/PUB/Whamcloud+Designs.

The Operations Manual is also quite useful i think, at
https://wiki.hpdd.intel.com/display/PUB/Documentation.

Added to all this, there are quite a few presentation slides and av
recordings from previous LUG/LAD or other events around the web that you
might find useful.

As Oleg has hinted, some of the information you may come across might be a
bit stale, as it applies to previous versions of the source, so please keep
in mind that whole subsystems that are referenced in a document you are
reading may have been completely replaced (by newer and better versions).
But don''t let this be an issue, please ask here if something does not
make
sense; people are usually quite keen to help.



Cheers,
Nikitas


On 14 May 2013 15:58, Cory Spitz <spitzcor at cray.com> wrote:
> Same disclaimer applies for http://wiki.lustre.org/lid/agi/agi.html.
>
> The OpenSFS CDWG has discussed bringing these documents up-to-date.
> Nothing concrete yet though.
>
> Thanks,
> -Cory
>
>
> On 5/14/13 1:49 AM, "Drokin, Oleg" <oleg.drokin at
intel.com> wrote:
>
> >Additionally there''s this pretty good (though stale in many
parts now,
> >but still some other parts are ok and high level is certainly ok)
> >Lustre internals book: users.nccs.gov/~fwang2/papers/lustre_report.pdf?
> >
> >On May 13, 2013, at 5:34 PM, Prakash Surya wrote:
> >
> >> I wish you luck in your endeavour!
> >>
> >> Here are some links which might prove useful to you:
> >>
> >> * https://jira.hpdd.intel.com - New issues are opened here
> >>
> >> * http://review.whamcloud.com - New patches are reviewed here
> >>
> >> * https://wiki.hpdd.intel.com/display/PUB/Submitting+Changes -
Some
> >>   info on the development cycle used by the Lustre project.
> >>
> >> Unfortunately, there isn''t nearly enough documentation as
there should
> >> be in the Lustre tree (especially for new comers), so feel free to
ask
> >> questions.
> >>
> >> As far as potential projects, in my opinion, the project list you
> >> linked to is a bit dated. There are *many* open issues which need
to be
> >> fixed, so I would suggest finding something that interests you on
the
> >> JIRA bug tracker that I linked to above, since that is a more up
to date
> >> source of information.
> >>
> >> If you are completely new, a good place to start is just
downloading the
> >> git tree, building, and running the unit tests locally to get
familiar
> >> with the project. Then you can start to modify the source and
explore
> >> some of the areas that interest you.
> >>
> >> --
> >> Cheers, Prakash
> >>
> >> On Fri, May 10, 2013 at 06:03:27PM -0400, twanjari at
andrew.cmu.eduwrote:
> >>> Hi all,
> >>>
> >>> I am a grad student at Carnegie Mellon University. I had my
course
> >>>work in
> >>> advanced storage systems in previous semester, and I am
interested to
> >>>work
> >>> on Lustre. I prefer to take up a project that could be
completed in a
> >>> duration of a month or two.
> >>>
> >>> Since I am a novice w.r.t. my familiarity with Lustre code
base, I seek
> >>> your opinion to choose a project from the list:
> >>> http://wiki.lustre.org/index.php/Lustre_Project_List
> >>>
> >>> My preferences (in order) are:
> >>> 1. fallocate() API -
https://bugzilla.lustre.org/show_bug.cgi?id=15064
> >>> 2. kernel patch removal -
> >>>https://bugzilla.lustre.org/show_bug.cgi?id=21524
> >>> 3. ioctl() number cleanups -
> >>> https://bugzilla.lustre.org/show_bug.cgi?id=20731
> >>> I am also open to other suggestion.
> >>>
> >>> Any suggestions regarding code walkthrough or documentation to
help
> >>> ramping up are also welcome.
> >>>
> >>> Thanks,
> >>> Tejas Wanjari
> >>>
> >>> _______________________________________________
> >>> Lustre-devel mailing list
> >>> Lustre-devel at lists.lustre.org
> >>> http://lists.lustre.org/mailman/listinfo/lustre-devel
> >> _______________________________________________
> >> Lustre-devel mailing list
> >> Lustre-devel at lists.lustre.org
> >> http://lists.lustre.org/mailman/listinfo/lustre-devel
> >
> >_______________________________________________
> >Lustre-devel mailing list
> >Lustre-devel at lists.lustre.org
> >http://lists.lustre.org/mailman/listinfo/lustre-devel
>
> _______________________________________________
> Lustre-devel mailing list
> Lustre-devel at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-devel
>
-- 


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I am looking into some Lustre development but want to build everything 
from scratch. I looked around to see how the linux kernel is configured 
but don''t seem to find anything.

any ideas?

thanks,

Ron

hello,

I am looking into some Lustre development but want to build everything 
from scratch. I looked around to see how the linux kernel is configured 
but don''t seem to find anything.

any ideas?

thanks,

Ron

If you use the zfs osd for your servers, there is no need to modify your 
Linux kernel.  That is probably a much easier way to get started with 
Lustre development.

If you are set on using the ldiskfs osd, Intel has some instructions on 
their wiki here:

   https://wiki.hpdd.intel.com/display/PUB/Building+Lustre+from+Source

Chris

On 05/21/2013 07:11 AM, Ron Croonenberg wrote:
> hello,
>
> I am looking into some Lustre development but want to build everything
> from scratch. I looked around to see how the linux kernel is configured
> but don''t seem to find anything.
>
> any ideas?
>
> thanks,
>
> Ron
> _______________________________________________
> Lustre-devel mailing list
> Lustre-devel at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-devel
>

Hi Chris,

thanks for the link.  What I was looking for was the Linux kernel config 
but couldn''t find any documentation foor (would have been nice to find 
the ones that are actuallu used in the binaries).

Basically what I did is take my RHEL6 config and configured the kernel 
wit and compiling that seemed to work. (I did compile the rpms, just a 
regular make. That seemed to work for 1.8.7.
I haven''t installed anything yet., so we''ll see on that part.

thanks,

Ron

On 05/21/2013 12:16 PM, Christopher J. Morrone wrote:
> If you use the zfs osd for your servers, there is no need to modify your
> Linux kernel.  That is probably a much easier way to get started with
> Lustre development.
>
> If you are set on using the ldiskfs osd, Intel has some instructions on
> their wiki here:
>
>     https://wiki.hpdd.intel.com/display/PUB/Building+Lustre+from+Source
>
> Chris
>
> On 05/21/2013 07:11 AM, Ron Croonenberg wrote:
>> hello,
>>
>> I am looking into some Lustre development but want to build everything
>> from scratch. I looked around to see how the linux kernel is configured
>> but don''t seem to find anything.
>>
>> any ideas?
>>
>> thanks,
>>
>> Ron
>> _______________________________________________
>> Lustre-devel mailing list
>> Lustre-devel at lists.lustre.org
>> http://lists.lustre.org/mailman/listinfo/lustre-devel
>>
>
> _______________________________________________
> Lustre-devel mailing list
> Lustre-devel at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-devel
>

Kernel configs are kept in the tree.  You can find master''s set at
http://git.whamcloud.com/?p=fs/lustre-release.git;a=tree;f=lustre/kernel_pa
tches/kernel_configs;h=88ca1484fa6597a7d786f3f09f03612f6d039db2;hb=HEAD

-Cory

On 5/21/13 2:04 PM, "Ron Croonenberg" <ronc at lanl.gov> wrote:
>Hi Chris,
>
>thanks for the link.  What I was looking for was the Linux kernel config
>but couldn''t find any documentation foor (would have been nice to
find
>the ones that are actuallu used in the binaries).
>
>Basically what I did is take my RHEL6 config and configured the kernel
>wit and compiling that seemed to work. (I did compile the rpms, just a
>regular make. That seemed to work for 1.8.7.
>I haven''t installed anything yet., so we''ll see on that
part.
>
>thanks,
>
>Ron
>
>On 05/21/2013 12:16 PM, Christopher J. Morrone wrote:
>> If you use the zfs osd for your servers, there is no need to modify
your
>> Linux kernel.  That is probably a much easier way to get started with
>> Lustre development.
>>
>> If you are set on using the ldiskfs osd, Intel has some instructions on
>> their wiki here:
>>
>>     https://wiki.hpdd.intel.com/display/PUB/Building+Lustre+from+Source
>>
>> Chris
>>
>> On 05/21/2013 07:11 AM, Ron Croonenberg wrote:
>>> hello,
>>>
>>> I am looking into some Lustre development but want to build
everything
>>> from scratch. I looked around to see how the linux kernel is
configured
>>> but don''t seem to find anything.
>>>
>>> any ideas?
>>>
>>> thanks,
>>>
>>> Ron
>>> _______________________________________________
>>> Lustre-devel mailing list
>>> Lustre-devel at lists.lustre.org
>>> http://lists.lustre.org/mailman/listinfo/lustre-devel
>>>
>>
>> _______________________________________________
>> Lustre-devel mailing list
>> Lustre-devel at lists.lustre.org
>> http://lists.lustre.org/mailman/listinfo/lustre-devel
>>
>_______________________________________________
>Lustre-devel mailing list
>Lustre-devel at lists.lustre.org
>http://lists.lustre.org/mailman/listinfo/lustre-devel

ok, cool thanks..   that probably will work better. (there were still a 
bunch of config options that were ''NEW'' but a lot less

Ron

On 05/21/2013 01:24 PM, Cory Spitz wrote:
> Kernel configs are kept in the tree.  You can find master''s set at
> http://git.whamcloud.com/?p=fs/lustre-release.git;a=tree;f=lustre/kernel_pa
> tches/kernel_configs;h=88ca1484fa6597a7d786f3f09f03612f6d039db2;hb=HEAD
>
> -Cory
>
> On 5/21/13 2:04 PM, "Ron Croonenberg" <ronc at lanl.gov>
wrote:
>
>> Hi Chris,
>>
>> thanks for the link.  What I was looking for was the Linux kernel
config
>> but couldn''t find any documentation foor (would have been nice
to find
>> the ones that are actuallu used in the binaries).
>>
>> Basically what I did is take my RHEL6 config and configured the kernel
>> wit and compiling that seemed to work. (I did compile the rpms, just a
>> regular make. That seemed to work for 1.8.7.
>> I haven''t installed anything yet., so we''ll see on
that part.
>>
>> thanks,
>>
>> Ron
>>
>> On 05/21/2013 12:16 PM, Christopher J. Morrone wrote:
>>> If you use the zfs osd for your servers, there is no need to modify
your
>>> Linux kernel.  That is probably a much easier way to get started
with
>>> Lustre development.
>>>
>>> If you are set on using the ldiskfs osd, Intel has some
instructions on
>>> their wiki here:
>>>
>>>     
https://wiki.hpdd.intel.com/display/PUB/Building+Lustre+from+Source
>>>
>>> Chris
>>>
>>> On 05/21/2013 07:11 AM, Ron Croonenberg wrote:
>>>> hello,
>>>>
>>>> I am looking into some Lustre development but want to build
everything
>>>> from scratch. I looked around to see how the linux kernel is
configured
>>>> but don''t seem to find anything.
>>>>
>>>> any ideas?
>>>>
>>>> thanks,
>>>>
>>>> Ron
>>>> _______________________________________________
>>>> Lustre-devel mailing list
>>>> Lustre-devel at lists.lustre.org
>>>> http://lists.lustre.org/mailman/listinfo/lustre-devel
>>>>
>>>
>>> _______________________________________________
>>> Lustre-devel mailing list
>>> Lustre-devel at lists.lustre.org
>>> http://lists.lustre.org/mailman/listinfo/lustre-devel
>>>
>> _______________________________________________
>> Lustre-devel mailing list
>> Lustre-devel at lists.lustre.org
>> http://lists.lustre.org/mailman/listinfo/lustre-devel
>