On Mon, Feb 13, 2012 at 09:57:31PM +0200, Timo Sirainen wrote: > > > > $ doveconf maildir_very_dirty_syncs > > maildir_very_dirty_syncs = yes > > > > but I don't think this gave the advantage I was expecting.. Was > > expecting this to move most iops to the index-luns, but the maildir > > luns seems just as busy. > > This setting should get rid of almost all readdir() calls. If it doesn't, > something's not working right.
With maildir_very_dirty_syncs = yes: ReadMB/s WriteMB/s F_open f_close reads writes rdir inode 1.5 0.0 96 92 514 73 9 7 1.2 0.0 59 43 367 18 4 76 1.7 0.0 66 61 477 67 2 6 1.2 0.0 54 50 348 31 1 145 3.0 0.0 113 90 860 59 7 8 2.9 0.0 107 99 840 58 5 11 4.0 0.0 131 101 1117 77 2 65 With maildir_very_dirty_syncs = no (same node, a few seconds later): ReadMB/s WriteMB/s F_open f_close reads writes rdir inode 4.6 0.9 125 91 1161 1096 41 6 2.3 0.7 200 170 697 127 86 16 1.1 0.6 124 99 406 61 48 109 2.7 0.1 212 144 755 114 74 15 2.7 0.0 159 133 818 70 78 194 0.8 1.2 86 73 225 60 16 9 1.9 0.0 124 116 573 53 30 6 So it seems to be working, good :-) -jf
