[Pvfs2-users] Is there a way to prevent MPI-ROMIO access?
slang at mcs.anl.gov
Fri Aug 31 13:36:52 EDT 2007
On Aug 31, 2007, at 11:55 AM, Bill Wichser wrote:
> Thanks, that's the right command. Now that I see it I even
> remember using it in the past, wrapped around the pvfs2-fsck!
> We actually have a system reservation set for Monday morning so
> once the jobs in the queue trickle down, we'll be able to start the
pvfs2-fsck sets the admin mode before running, and puts it back to
normal mode once its done.
> Murali Vilayannur wrote:
>> Hi Bill,
>> One way to do this is to switch the server to admin mode. I think you
>> can do that using pvfs2-set-mode in src/apps/admin.
>> After that the server won't take regular requests I think..
>> I don't know if the fsck app already does that..You will of course
>> need to switch the mode back after the fsck finishes...
>> It has been a while since I looked at that code.. so I could be
>> wrong.. :)
>> It would be best if you ask all users to kill their jobs before
>> running fsck..
>> Online fsck is probably going to cause a lot of grief if users are
>> actively using
>> the volume...
>> On 8/31/07, Bill Wichser <bill at princeton.edu> wrote:
>>> We'd finally like to run an fsck to try and clean up our pvfs2
>>> filesystem (see my previous post about kernel crashes) but are
>>> about users' jobs still accessing the filesystem while we are
>>> these checks.
>>> From the kernel interface, this is easy, we simply disable the
>>> module. The other method though, direct access via the API/MPI-
>>> remains an issue. Is there some method we can use to disable access
>>> through this interface? Or can we just run the fsck without
>>> about this?
>>> Pvfs2-users mailing list
>>> Pvfs2-users at beowulf-underground.org
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