I’ve never seen any difficulties with PyTorch saving checkpoint files to Lustre. Is it a special file format or just torch.save()? When the processes hang, have you tried using something like py-spy and/or gdb to get a stack trace of where in the software stack it’s hung?
> Date: Thu, 11 Jul 2024 12:25:05 -0400 > From: Michael DiDomenico <mdidomeni...@gmail.com> > To: Beowulf Mailing List <Beowulf@beowulf.org> > Subject: [Beowulf] lustre / pytorch > Message-ID: > <cabosp2p7l4j8kjqrqxc9u_yj3mljhj68z6fy17o5+e0weey...@mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > i have a strange problem, but honestly i'm not sure where the issue > is. we have users running LLM models through pytorch. part of the > process saves off checkpoints at periodic intervals. when the > checkpoint files are being written we can see in the logs the pytorch > writing out the save files from each of the processes to lustre. > > it chugs along for a little bit, but then comes to a grinding halt. > no error from pytorch is logged and no errors can be found on the > lustre clients or servers. the problem is also not transient, it > happens every time the process runs > > the weird part is, if we switch the output directory from lustre to > nfs (netapp backed), the pytorch run works perfectly fine > > has anyone seen anything like this? any suggestions on trouble > shooting the issue? > > given that we have a 10x performance difference between netapp and > lustre, i'm pretty keen on getting this fixed _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit https://beowulf.org/cgi-bin/mailman/listinfo/beowulf
