On Tue, Jan 31, 2012 at 09:52:05AM -0500, Christoph Hellwig wrote: > You don't just read a single file at a time but multiple ones, don't > you? It's sequential at the moment, although I'll do further tests with the -c (concurrency) option to bonnie++ > Try playing with the following tweaks to get larger I/O to the disk: > > a) make sure you use the noop or deadline elevators > b) increase /sys/block/sdX/queue/max_sectors_kb from its low default > c) dramatically increase /sys/devices/virtual/bdi/<major>:<minor>/read_ahead_kb Thank you very much: I will do further tests with these. Is the read_ahead_kb knob aware of file boundaries? That is, is there any risk that if I set it too large it would read useless blocks past the end of the file? Regards, Brian. _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
