On 19 May, 2011 - Sa??o Kiselkov sent me these 0,6K bytes: > Hi all, > > I'd like to ask whether there is a way to monitor disk seeks. I have an > application where many concurrent readers (>50) sequentially read a > large dataset (>10T) at a fairly low speed (8-10 Mbit/s). I can monitor > read/write ops using iostat, but that doesn't tell me how contiguous the > data is, i.e. when iostat reports "500" read ops, does that translate to > 500 seeks + 1 read per seek, or 50 seeks + 10 reads, etc? Thanks!
Get DTraceToolkit and check out the various things under Disk and FS, might help. /Tomas -- Tomas Ögren, st...@acc.umu.se, http://www.acc.umu.se/~stric/ |- Student at Computing Science, University of Umeå `- Sysadmin at {cs,acc}.umu.se _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
