Hi, So we have three lustre nodes ATM, say A, B and C. The MSG+OSS and two additional ones which are OSS's too.
In this case we have an LVM called /dev/mapper/audiodb--1--5-audiodb_0 which is one part of many ext4 file systems that make up the whole audiodb file system under Lustre. I've checked all three machines and confirmed that only host A mounts that LVM, however all three can see the LVM as we are multi-pathing the fibre to the backend storage. On host A I can run "tune2fs -l /dev/mapper/audiodb--1--5-audiodb_0" just fine. But when I try to run "tune2fs -e panic /dev/mapper/audiodb--1--5-audiodb_0" this happens: Snip--- 0 A:~# tune2fs -e panic /dev/mapper/audiodb--1--5-audiodb_0 tune2fs 1.42.13.wc4 (28-Nov-2015) tune2fs: MMP: device currently active while trying to open /dev/mapper/audiodb--1--5-audiodb_0 MMP error info: last update: Thu Aug 11 10:55:48 2016 node: A device: dm-20 0 A:~# Snip--- Can anyone help with this? Yours Faye PS Hostnames changed. -----Original Message----- From: COUVEE, PHILIPPE [mailto:[email protected]] Sent: 04 August 2016 14:56 To: Gibbins, Faye <[email protected]>; Mohr Jr, Richard Frank (Rick Mohr) <[email protected]> Cc: [email protected] Subject: RE: [lustre-discuss] tune2fs being blocked by MMP Hi, If I'm not wrong, MMP stands for Multiple Mount Protection, and is activated to prevent mounting a device that is already mounted on another node in an HA cell. In your case, are you trying to issue the tunefs command on the "backup" node for that device ? What if you try running tunefs on the OSS where the device is currently mounted ? Philippe -----Original Message----- From: lustre-discuss [mailto:[email protected]] On Behalf Of Gibbins, Faye Sent: Thursday, August 04, 2016 3:40 PM To: Mohr Jr, Richard Frank (Rick Mohr) Cc: [email protected] Subject: Re: [lustre-discuss] tune2fs being blocked by MMP Hi, Yes it is mounted. But that's not always a problem. We have a test lustre cluster where it's mounted and the tune2fs works fine. But it fails in production. Production have failover turned on for the OSTs. Something absent on that particular test cluster. Is it possible there's something in lustre that prohibits tune2fs working only when failover is on for an OST? Faye -----Original Message----- From: Mohr Jr, Richard Frank (Rick Mohr) [mailto:[email protected]] Sent: 02 August 2016 17:38 To: Gibbins, Faye <[email protected]> Cc: [email protected] Subject: Re: [lustre-discuss] tune2fs being blocked by MMP > On Aug 2, 2016, at 10:38 AM, Gibbins, Faye <[email protected]> wrote: > > > tune2fs: MMP: device currently active while trying to open > /dev/mapper/scratch--1--5-scratch_3 > > MMP error info: last update: Tue Aug 2 15:34:09 2016 > > node: edi-vf-1-5.ad.cirrus.com device: dm-19 > > 0 edi-vf-1-5:~# Is the device currently mounted? If so, that would explain the error. -- Rick Mohr Senior HPC System Administrator National Institute for Computational Sciences https://urldefense.proofpoint.com/v2/url?u=http-3A__www.nics.tennessee.edu&d=DQIFAg&c=O3LcjD-V2Iepl5V0N1424A&r=zYKOt5zq8DxD76qBilrgQKxtITGPmVmWHHVOs6JpkMQ&m=HHqIHO6NJdOqJbinMrvMmk8S9oklNJRSgMNfnTOJLVk&s=9Ntf1l5dP_4JpRf-8OjiWKFFzwoJ5BP7VC-uNgSLF3k&e= This message and any attachments may contain privileged and confidential information that is intended solely for the person(s) to whom it is addressed. If you are not an intended recipient you must not: read; copy; distribute; discuss; take any action in or make any reliance upon the contents of this message; nor open or read any attachment. If you have received this message in error, please notify us as soon as possible on the following telephone number and destroy this message including any attachments. Thank you. Cirrus Logic International (UK) Ltd and Cirrus Logic International Semiconductor Ltd are companies registered in Scotland, with registered numbers SC089839 and SC495735 respectively. Our registered office is at Westfield House, 26 Westfield Road, Edinburgh, EH11 2QB, UK. Tel: +44 (0)131 272 7000. cirrus.com _______________________________________________ lustre-discuss mailing list [email protected] https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.lustre.org_listinfo.cgi_lustre-2Ddiscuss-2Dlustre.org&d=DQIFAg&c=O3LcjD-V2Iepl5V0N1424A&r=zYKOt5zq8DxD76qBilrgQKxtITGPmVmWHHVOs6JpkMQ&m=fWmW7_jkiSUZRhKkznsqAA6VMAPgHz6MaGwyaVQK83o&s=0Rgf5dFYQXm0fZA8rKzfRItZ__7GPWwsVDUNaY0-ayo&e= _______________________________________________ lustre-discuss mailing list [email protected] http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
