[Lustre-discuss] Lustre 2.0 client cache size

2011-03-17 Thread DEGREMONT Aurelien
Hello I'm trying to control the amount of cache memory used by Lustre clients with Lustre 2.0 There is a /proc tuning called max_cache_mb in llite which is documented in Lustre manual. Unfortunately, after testing it and checking the source code it seems this variable is present but it not

[Lustre-discuss] MDS hangs with OFED

2011-03-17 Thread Kevin Hildebrand
We've been seeing occasional hangs on our MDS and I'd like to see if anyone else is seeing this or can provide suggestions on where to look. This might not even be a Lustre problem at all. We're running Lustre 1.8.4 with OFED 1.5.2, and kernel version 2.6.18-194.3.1.el5_lustre.1.8.4. The

Re: [Lustre-discuss] MDS hangs with OFED

2011-03-17 Thread Cliff White
Unfortunately, we've had lot's of reports of IB instability. It does appear to happen quite a bit, and generally is not a Lustre problem at all. - Check all mechanical connections, cables, etc. - replace if need be - many issues have been cable-related. - Check firmware versions of all IB cards,

Re: [Lustre-discuss] Lustre 2.0 client cache size

2011-03-17 Thread Andreas Dilger
On 2011-03-17, at 6:37 AM, DEGREMONT Aurelien wrote: I'm trying to control the amount of cache memory used by Lustre clients with Lustre 2.0 There is a /proc tuning called max_cache_mb in llite which is documented in Lustre manual. Unfortunately, after testing it and checking the source

Re: [Lustre-discuss] Lustre 2.0 client cache size

2011-03-17 Thread Oleg Drokin
Hello! On Mar 17, 2011, at 5:44 PM, Andreas Dilger wrote: I did not find if this was removed or this was partially included in Lustre 2.0. What's the current status of this and how can I tell to my client to avoid caching too many data? The client VM usage was one of the areas that was