I have storage 2TB with 4K cluster size. Collected statistic says, that 4K max reading block from disc. But extX - variable read size up to 50K with cluster size 4K. ocfs2 have no prefetch? Centos 5.4, ocfs2-1.4.4-1
Dmitry Rybin wrote:> I have storage 2TB with 4K cluster size. Collected statistic says, > that 4K max reading block from disc. > But extX - variable read size up to 50K with cluster size 4K. > > ocfs2 have no prefetch? > > Centos 5.4, ocfs2-1.4.4-1 >Is the workload the same on the two volumes? This number will vary with workload. To answer your qs... yes. ocfs2 does readahead for inodes.