Lustre discuss - Jun 2009 - Persistent write-back cache

Hello,

I noticed that manual refers to write-back cache feature:
4.4.9 Configure a Client with a Persistent Write-Back Cache

On the client format a loop device cache for OSS and MDS cache combined with
mkfs.lustre:

mkfs.lustre --loop --ost --mdt --cachefor=<mds hostdesc>[,<mds2
hostdesc>
..]:/<fsname> <cache file>

Now simply mount the cache:

mount.lustre -o loop <cache file> <cli mtpt>


http://manual.lustre.org/manual/LustreManual16_HTML/ConfiguringLustre.html

unfortunately, mkfs.lustre does not support the --cachefor option. Is this
option deprecated or something in roadmap?

-- 
Luk?? Hejtm?nek

On Jun 10, 2009  14:20 +0200, Lukas Hejtmanek wrote:
> I noticed that manual refers to write-back cache feature:
> 4.4.9 Configure a Client with a Persistent Write-Back Cache
> 
> On the client format a loop device cache for OSS and MDS cache combined
with
> mkfs.lustre:
> 
> mkfs.lustre --loop --ost --mdt --cachefor=<mds hostdesc>[,<mds2
hostdesc>
> ..]:/<fsname> <cache file>
> 
> Now simply mount the cache:
> 
> mount.lustre -o loop <cache file> <cli mtpt>
> 
> 
> http://manual.lustre.org/manual/LustreManual16_HTML/ConfiguringLustre.html
> 
> unfortunately, mkfs.lustre does not support the --cachefor option. Is this
> option deprecated or something in roadmap?
This option has been removed from the next version of the manual.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.