[Lustre-discuss] How to estimate the time for e2fsck on OST

Adam adam at sharcnet.ca
Fri Sep 4 06:44:11 PDT 2009


What if there *are* serious file-system problems? We're half-way into
CPU hour 7 of our e2fsck run on a 8TB OST with ~274 million inodes:

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND 
##### root      25   0 15.1g 1.1g  772 R  100 57.4 472:07.67 e2fsck

If it finishes within my lifetime I'll post how long it takes.

Thanks,
Adam

On Wed, 2009-07-29 at 04:35 -0600, Andreas Dilger wrote:
> On Jul 29, 2009  15:16 +0800, huangql wrote:
> > We want to run e2fsck on OSTs to finish them. However, as to the
> > running time, we should estimate how long it takes to run e2fsck on
> > OSTs. We hopefully to know what elements to affect the running time like
> > the size of OST, the average size of files and so on. Can you give us
> > the tips for it? And I hope to receive you email as soon as possible.
> 
> The variables in your question are numerous:
> - size of the filesystem
> - number of inodes
> - number of allocated blocks
> - distribution of the above on the disk
> - speed of the disks
> - speed of the CPU
> - amount of RAM on server
> 
> Reasonable e2fsck times (without serious filesystem problems) might
> take between 5 minutes and 2 hours.
> 
> Cheers, Andreas
> --
> Andreas Dilger
> Sr. Staff Engineer, Lustre Group
> Sun Microsystems of Canada, Inc.
> 
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-discuss




More information about the lustre-discuss mailing list