Re: file system performance in linux

2010-06-28 Thread Mulyadi Santosa
Hi Umesh I hope you don't mind if I cc: my reply to kernelnewbies mailing list as well On Mon, Jun 28, 2010 at 20:17, Umesh kanodia umesh.kano...@gmail.com wrote: Hello Mulyadi, I just started working UDF file system.I would like to know if test suites avialiable  to test functionality

Re: file system performance in linux

2008-10-27 Thread Mulyadi Santosa
Hi.. On Mon, Oct 27, 2008 at 8:22 PM, pradeepkumar soman [EMAIL PROTECTED] 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

Re: file system performance in linux

2008-10-24 Thread Mulyadi Santosa
On Fri, Oct 24, 2008 at 12:52 AM, pradeepkumar soman [EMAIL PROTECTED] wrote: Hi, Anybody please tell me who is actually setting the readahead flag? I think it sits between VFS and filesystem. Actually what is the difference between linux-2.6.15 and linux-2.6.23 in terms of readahead. My

Re: file system performance in linux

2008-10-24 Thread Mulyadi Santosa
Hi... On Fri, Oct 24, 2008 at 9:41 PM, pradeepkumar soman [EMAIL PROTECTED] wrote: high means better performance. I am using the sequential reading How VFS takes decision on whether to turn on readahead? I see fortunately newer readahead is invented by Fengguang Wu and once I wrote

Re: file system performance in linux

2008-10-24 Thread pradeepkumar soman
high means better performance. I am using the sequential reading How VFS takes decision on whether to turn on readahead? On 10/24/08, Mulyadi Santosa [EMAIL PROTECTED] wrote: On Fri, Oct 24, 2008 at 12:52 AM, pradeepkumar soman [EMAIL PROTECTED] wrote: Hi, Anybody please tell me who is

Re: file system performance in linux

2008-10-23 Thread pradeepkumar soman
Hi, Anybody please tell me who is actually setting the readahead flag? is it the file system or is it the vfs(fs/readahead.c)? Actually what is the difference between linux-2.6.15 and linux-2.6.23 in terms of readahead. My file system read performance is very high in linux-2.6.23 compared to

Re: file system performance in linux

2008-10-07 Thread Greg Freemyer
Putting kernelnewbies back in the cc line. (please don't drop linux kernel mailing lists from replies) On Tue, Oct 7, 2008 at 2:56 PM, pradeepkumar soman [EMAIL PROTECTED] wrote: Hi Greg, I am working with UDF file system(block size of 4KB) in Linux. I tried to read a 1GB file

Re: file system performance in linux

2008-10-06 Thread Mulyadi Santosa
On Sat, Oct 4, 2008 at 12:06 AM, pradeepkumar soman [EMAIL PROTECTED] wrote: Hi, I just want to know the factors on which the file system read depends First, you need to know the related fs lay out data in disk. For example, for fs like XFS which does delayed write, data is kept

Re: file system performance in linux

2008-10-04 Thread Sitsofe Wheeler
Greg Freemyer wrote: On 10/3/08, pradeepkumar soman [EMAIL PROTECTED] wrote: Hi, I just want to know the factors on which the file system read depends I suspect that is way too general of a question, but read performance is impacted by: snip Not to mention location on the disk (at

file system performance in linux

2008-10-03 Thread pradeepkumar soman
Hi, I just want to know the factors on which the file system read depends Regards, Pradeep

Re: file system performance in linux

2008-10-03 Thread Greg Freemyer
On 10/3/08, pradeepkumar soman [EMAIL PROTECTED] wrote: Hi, I just want to know the factors on which the file system read depends Regards, Pradeep I suspect that is way too general of a question, but read performance is impacted by: filesystem (ext2 / xfs / reiserfs / etc.)