Re: [lustre-discuss] Mounting lustre on block device

2023-03-17 Thread Laura Hild via lustre-discuss
Hi Shambhu- I think lustre-discuss might be able to help you better if you were to explain why it is that you want to mount a Lustre filesystem as a block device. Is it just to get it to show up in the output of lsblk? Would you prefer the output of findmnt? -Laura

Re: [lustre-discuss] Repeated ZFS panics on MDT

2023-03-17 Thread Andreas Dilger via lustre-discuss
It's been a while since I've worked with ZFS servers, but one old chestnut that caused problems with ZFS 0.7 on the MDTs was the variable dnode size feature. I believe there was a tunable, something like "dnodesize=auto" that caused problems, and this could be changed to "dnodesize=1024" or

Re: [lustre-discuss] Repeated ZFS panics on MDT

2023-03-17 Thread Kaizaad Bilimorya
We have also seen a similar issue in the past. The bug report is here which talks about the zfs patches: https://jira.whamcloud.com/browse/LU-13536 thanks -k -- Kaizaad Bilimorya Systems Administrator - SHARCNET | http://www.sharcnet.ca Digital Research Alliance of Canada On Fri, Mar 17, 2023 at

Re: [lustre-discuss] Repeated ZFS panics on MDT

2023-03-17 Thread Bernd Melchers
Hi all, it may not help directly, but... your error is related to zfs, not to lustre. We had for years a problem with kernel panic on our lustre mds (lustre-2.12.*, zfs-0.7.*) when the load is high, until we integrated patches 78e213946 and 58769a4eb in our zfs-0.7.13 sources: git cherry-pick

Re: [lustre-discuss] Repeated ZFS panics on MDT

2023-03-17 Thread Mountford, Christopher J. (Dr.) via lustre-discuss
Unfortunately this problem seems to be getting worse, to the point where ZFS Panics immediately after Lustre recovery completes when the system is under load. Luckily this happened on our /home filesystem which is relatively small. We are rebuilding onto spare hardware so we can return the

Re: [lustre-discuss] Lustre project quotas and project IDs

2023-03-17 Thread Passerini Marco
Hi Andreas, I'm talking the order of ~10,000s of project IDs. I've been thinking the same as you, that is, doing PROJID=1M + UID etc. However, in our case, it might be better to rely on some scripting and an external DB, to keep track of the latest added ID, so that we could increment the