On Mon, Dec 11, 2006 at 12:44:40 -0500, Ric Wheeler <ric@xxxxxxx> wrote: > > I will send you the test code that I use & some test runs, I tried out Ric's test code and it does appear that the barrier is working under fc5 using software raid. For the quick test I didn't have an idle system. If I ran with either no barrier option and write caching enabled I saw very roughly a 10x speed up. The test seemed to show running with write caching disabled was about 20% faster than with just using barriers. My theory is that because there was a lot of other disk activity, the cache flushes forced by using barriers was writing a lot of disk blocks from outside the test making it report slower numbers, while in theory my system throughput was actually better. Tonight I can try the test on a system without a lot of disk activity and see if that makes much difference. Thanks Ric. _______________________________________________ Ext3-users mailing list Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
