On Wed, Feb 1, 2012 at 1:27 PM, Sunil Mushran <sunil.mush...@oracle.com>wrote:
> On 02/01/2012 10:24 AM, Mark Hampton wrote: > >> Here's what I got from debugfs.ocfs2 -R "stats". I have to type it out >> manually, so I'm only including the "features" lines: >> >> Feature Compat: 3 backup-super strict-journal-super >> Feature Incompat: 16208 sparse extended-slotmap inline-data metaecc >> xattr indexed-dirs refcount discontig-bg >> Feature RO compat: 7 unwritten usrquota grpquota >> >> >> Some other info that may be interesting: >> >> Links: 0 Clusters: 52428544 >> > > > I would disable quotas. That line suggests the vol is 200G is size. > Ok, I'll try disabling quotas and metaecc. Yes, the filesystem is 200GB. This particular filesystem is 1 out of 16 OCFS2 filesystems. This is a 1/5 scale test of what will be in production. I wonder if having 16 OCFS2 filesystems is ideal. 16 small OCFS2 filesystems definitely performed better than 1 large OFCS2 filesystem. Writing across 16 small OCFS2 filesystems turned out to be at least twice as fast. I don't know what the optimal number is though. I noticed that there appear to be separate dlm process for each filesystem, so maybe reducing serialization is a factor in the improved performance?
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