[lustre-discuss] lustre filesystem in hung state

2019-02-19 Thread Anilkumar Naik
Dear All, Lustre file system goes to hung state and unable to know the exact issue with lustre. Kindly find below information and help us to know the fixes for flle system kernerl hung issue. Cluster Details: Oss node/server is mounted with below mount targets. We could able to mount the client

Re: [lustre-discuss] Migrate MGS to ZFS

2019-02-19 Thread Andreas Dilger
PS: it is always a good idea to make a backup of your MDT, since it is relatively small compared to the rest of the filesystem. A full-device "dd" copy doesn't take too long and is the most accurate backup for ldiskfs. Cheers, Andreas > On Feb 19, 2019, at 19:31, Andreas Dilger wrote: > >

Re: [lustre-discuss] Migrate MGS to ZFS

2019-02-19 Thread Andreas Dilger
Yes, it is possible to migrate the MGS files to another device as you propose. I don't think there is any particular difference if you move it to a separate ldiskfs or ZFS target. One caveat is that we don't test combined ZFS and ldiskfs targets on the same node, though in theory it would

[lustre-discuss] Migrate MGS to ZFS

2019-02-19 Thread Fernando PĂ©rez
Dear lustre experts. Whats is the best way to migrate a MGS device to ZFS? Copy the CONFIGS/filesystem_name-* files from the old ldiskfs device to the new ZFS MGS device? Currently we have a combined MDT/MGT under ldiskfs with lustre 2.10.4. We want to upgrade to lustre 2.12.0 and then