Re: [Linux-cluster] GFS tuning for combined batch / interactive use

2010-12-17 Thread Kevin Maguire
Hi Steven: Thanks again. If you have access to the Red Hat kbase system, then this is all described in the docs on that site. I do as we have RedHat support for other platforms, just not this one. The docs I found that are worthy of a slow reading are probably: https://access.redhat.com/kb

[Linux-cluster] GFS block size

2010-12-17 Thread Jeff Sturm
One of our GFS filesystems tends to have a large number of very small files, on average about 1000 bytes each. I realized this week we'd created our filesystems with default options. As an experiment on a test system, I've recreated a GFS filesystem with "-b 1024" to reduce overall disk usage a

Re: [Linux-cluster] GFS tuning for combined batch / interactive use

2010-12-17 Thread Steven Whitehouse
Hi, On Fri, 2010-12-17 at 20:06 +0100, Kevin Maguire wrote: > Hi > > > You can get a glock dump via debugfs which may show up contention, looks > > for type 2 glocks which have lots of lock requests queued but not > > granted. The lock requests (holders) are tagged with the relevant > > proces

Re: [Linux-cluster] GFS tuning for combined batch / interactive use

2010-12-17 Thread Kevin Maguire
Hi You can get a glock dump via debugfs which may show up contention, looks for type 2 glocks which have lots of lock requests queued but not granted. The lock requests (holders) are tagged with the relevant process. Note I am currently using GFS, not GFS2. And before going further I ran th

Re: [Linux-cluster] how can install GFS-Cluster on rhel5.2

2010-12-17 Thread Ben Turner
Here is a link to the documentation, thats prolly the best place to start: http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Cluster_Administration/index.html If you have a support contract with Red Hat I suggest opening a case and one of the support techs can give you more detai

[Linux-cluster] how can install GFS-Cluster on rhel5.2

2010-12-17 Thread Rajiv Yadav
Hi.. i want to install cluster GFS on two nodes. which package i need installation GFS on RHEL5.2... Please provide full installation and configuration server and client based.. how to use Luci and Ricci.. -- Rajiv Yadav CRIS (An Organization of the Ministry of Railways, Govt. of India) Chanaky

Re: [Linux-cluster] GFS tuning for combined batch / interactive use

2010-12-17 Thread Steven Whitehouse
Hi, On Fri, 2010-12-17 at 17:35 +0100, Kevin Maguire wrote: > Hi > > Bob/Steven/Ben - many thanks for responding. > > > There is some helpful stuff here on the tuning side: > > > > http://sources.redhat.com/cluster/wiki/FAQ/GFS#gfs_tuning > > Indeed, we have implemented many these suggestions,

Re: [Linux-cluster] GFS tuning for combined batch / interactive use

2010-12-17 Thread Kevin Maguire
Hi Bob/Steven/Ben - many thanks for responding. There is some helpful stuff here on the tuning side: http://sources.redhat.com/cluster/wiki/FAQ/GFS#gfs_tuning Indeed, we have implemented many these suggestions, "fast statfs" is on, -r 2048 was used, quotas off, the cluster interconnect is a