On Thu, Feb 17, 2005 at 10:47:55AM -0500, Manuel Bujan wrote: > Hello, > > Is there anyway to improve the performance of a cman based gfs cluster > installation tunning some of its parameters ? > > We are using the dlm style locking mechanism in a two node 100 GB shared > gfs cluster with a DELL powervault 220s storage. > We already disabled the atime updates and the quotas_account but the gain > in performance is not too significant. > > Any other hints ? Look at /proc/cluster/lock_dlm/drop_count It's 50000 by default and increasing it could possibly improve things, or disable it altogether by setting to zero. e.g. echo "0" >> /proc/cluster/lock_dlm/drop_count You need to change this prior to mounting gfs on each node. When non-zero, GFS/lock_dlm tries to keep the number of locks held locally below this level which limits the caching gfs can do. When zero, no limiting is attempted. -- Dave Teigland <teigland@xxxxxxxxxx>
