Re: [lustre-discuss] [EXTERNAL] Re: Data recovery with lost MDT data

2023-09-21 Thread Vicker, Darby J. (JSC-EG111)[Jacobs Technology, Inc.] via lustre-discuss
I knew an lfsck would identify the orphaned objects. That’s great that it will move those objects to an area we can triage. With ownership still intact (and I assume time stamps too), I think this will be helpful for at least some of the users to recover some of their data. Thanks Andreas. I

Re: [lustre-discuss] Data recovery with lost MDT data

2023-09-21 Thread Andreas Dilger via lustre-discuss
In the absence of backups, you could try LFSCK to link all of the orphan OST objects into .lustre/lost+found (see lctl-lfsck_start.8 man page for details). The data is still in the objects, and they should have UID/GID/PRJID assigned (if used) but they have no filenames. It would be up to you t

Re: [lustre-discuss] Lustre 2.15.3: patching the kernel fails

2023-09-21 Thread Andreas Dilger via lustre-discuss
The first yes toon to ask is what is your end goal? If you just want to build only a client that is mounting to an existing server, then you can disable the server functionality: ./configure --disable-server and it should build fine. If you want to also build a server, and *really* want i

[lustre-discuss] Lustre 2.15.3: patching the kernel fails

2023-09-21 Thread Jan Andersen
My system: Debian 11, kernel version 5.10.0-13-amd64; I have the following source code: # ll /usr/src/ total 117916 drwxr-xr-x 2 root root 4096 Aug 21 09:19 linux-config-5.10/ drwxr-xr-x 4 root root 4096 Jul 25 2022 linux-headers-5.10.0-12-amd64/ drwxr-xr-x 4 root root 4096 J