Re: read perf improved by mounting ext2?

2001-04-24 Thread Jens Axboe
On Tue, Apr 24 2001, Kurt Garloff wrote: > > You wouldn't happen to have 4kB ext2 filesystems on those? > > Sure I do. > > > When ext2 mounts, it sets the soft blocksize to that then, I would expect > > this to give at least some benefit over using 1kB blocks (as your IDE > > partition

Re: read perf improved by mounting ext2?

2001-04-24 Thread Kurt Garloff
On Tue, Apr 24, 2001 at 10:58:58AM +0200, Jens Axboe wrote: > On Tue, Apr 24 2001, Kurt Garloff wrote: > > There are enough partitions to see a clear pattern: Those with mounted ext2 > > filesystems perform better. Umounting them does not harm, they just need to > > have been mounted once. reiser

Re: read perf improved by mounting ext2?

2001-04-24 Thread Jens Axboe
On Tue, Apr 24 2001, Kurt Garloff wrote: > I get it. But not over the whole disk. > Doing a read speed measurement on /dev/hda, I constantly get ~16 MB/s. > Not bad, but less than I'd expect. Measuring single partitions, some show > the same, some show significantly more, 26MB/s--18MB/s,

Re: read perf improved by mounting ext2?

2001-04-24 Thread Jens Axboe
On Tue, Apr 24 2001, Kurt Garloff wrote: I get it. But not over the whole disk. Doing a read speed measurement on /dev/hda, I constantly get ~16 MB/s. Not bad, but less than I'd expect. Measuring single partitions, some show the same, some show significantly more, 26MB/s--18MB/s, depending on

Re: read perf improved by mounting ext2?

2001-04-24 Thread Kurt Garloff
On Tue, Apr 24, 2001 at 10:58:58AM +0200, Jens Axboe wrote: On Tue, Apr 24 2001, Kurt Garloff wrote: There are enough partitions to see a clear pattern: Those with mounted ext2 filesystems perform better. Umounting them does not harm, they just need to have been mounted once. reiser or

Re: read perf improved by mounting ext2?

2001-04-24 Thread Jens Axboe
On Tue, Apr 24 2001, Kurt Garloff wrote: You wouldn't happen to have 4kB ext2 filesystems on those? Sure I do. When ext2 mounts, it sets the soft blocksize to that then, I would expect this to give at least some benefit over using 1kB blocks (as your IDE partition otherwise would

read perf improved by mounting ext2?

2001-04-23 Thread Kurt Garloff
Hi, I have some memory reading some similar question somewhere (here?) but I'm not sure there was an answer. I do observe strange behaviour if read performance fo my IDE harddisk as reported by hdparm (or doing linear reads with a self written program): My FUJITSU MPG3409AT E is supposed to

read perf improved by mounting ext2?

2001-04-23 Thread Kurt Garloff
Hi, I have some memory reading some similar question somewhere (here?) but I'm not sure there was an answer. I do observe strange behaviour if read performance fo my IDE harddisk as reported by hdparm (or doing linear reads with a self written program): My FUJITSU MPG3409AT E is supposed to