Hi.. On Mon, Oct 27, 2008 at 8:22 PM, pradeepkumar soman <pradeep2481@xxxxxxxxx> wrote: > Hi, > I am using the iozone tool for measuring the file system performance. but > when I use the auto mode in iozone the read performance is very low in some > cases(getting 32MB/s for record length > 128kb, for iGB file size) compared > to throughput mode(70MB/sec irrespective of the record or file size). What > is the reason for this difference. That could happen for many reasons: 1. single reader/writer versus multiple readers/writers 2. effectiveness of readahead algorithm implemented in your running kernel 3. hard disk's cache size 4. the way read/write is done 5. sync versus async and so on. regards, Mulyadi. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
