* about performace
@ 2006-09-28 6:51 nagesh kollu
2006-09-28 14:12 ` David Chatterton
2006-09-28 15:16 ` Eric Sandeen
0 siblings, 2 replies; 3+ messages in thread
From: nagesh kollu @ 2006-09-28 6:51 UTC (permalink / raw)
To: linux-xfs
hi,,
i'm new to xfs ..i want to know the performance details of xfs..
how much time it will take to write /read ...can anyone done this on ARM processor...the block size is 2^n only in xfs ..but for video streaming the incoming packet is 188 bytes .the sector size is 512 ...so the i/o buffer size is 188*512 ...how can we do this in xfs....cany anyone send the xfs performance details..
thanx!
nagesh.k
---------------------------------
Find out what India is talking about on - Yahoo! Answers India
Send FREE SMS to your friend's mobile from Yahoo! Messenger Version 8. Get it NOW
[[HTML alternate version deleted]]
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: about performace
2006-09-28 6:51 about performace nagesh kollu
@ 2006-09-28 14:12 ` David Chatterton
2006-09-28 15:16 ` Eric Sandeen
1 sibling, 0 replies; 3+ messages in thread
From: David Chatterton @ 2006-09-28 14:12 UTC (permalink / raw)
To: nagesh kollu; +Cc: linux-xfs
In general (no experience or suggestions for ARM processors), for video streaming:
- preallocate space for the files when writing, see xfsctl(3) and XFS_IOC_RESVSP
- use direct I/O, the larger the better. ie a MB or more at a time,
but at least ensure the direct I/O requests are aligned on page or
filesystem block boundaries, whichever is larger
- use asynchronous I/O or multiple threads to keep the disks busy
David
nagesh kollu wrote:
> hi,,
> i'm new to xfs ..i want to know the performance details of xfs..
> how much time it will take to write /read ...can anyone done this on ARM processor...the block size is 2^n only in xfs ..but for video streaming the incoming packet is 188 bytes .the sector size is 512 ...so the i/o buffer size is 188*512 ...how can we do this in xfs....cany anyone send the xfs performance details..
>
>
> thanx!
> nagesh.k
>
>
> ---------------------------------
> Find out what India is talking about on - Yahoo! Answers India
> Send FREE SMS to your friend's mobile from Yahoo! Messenger Version 8. Get it NOW
>
> [[HTML alternate version deleted]]
>
--
David Chatterton
XFS Engineering Manager
SGI Australia
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: about performace
2006-09-28 6:51 about performace nagesh kollu
2006-09-28 14:12 ` David Chatterton
@ 2006-09-28 15:16 ` Eric Sandeen
1 sibling, 0 replies; 3+ messages in thread
From: Eric Sandeen @ 2006-09-28 15:16 UTC (permalink / raw)
To: nagesh kollu; +Cc: linux-xfs
nagesh kollu wrote:
> hi,,
> i'm new to xfs ..i want to know the performance details of xfs..
> how much time it will take to write /read ...can anyone done this on ARM processor...the block size is 2^n only in xfs ..but for video streaming the incoming packet is 188 bytes .the sector size is 512 ...so the i/o buffer size is 188*512 ...how can we do this in xfs....cany anyone send the xfs performance details..
It sounds like you have a very specific environment that would be best
tested and evaluated by... you :)
Yes, the blocksizes are powers of two, but of course you can do any
arbitrary sized write, if that's what you're asking.
-Eric
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2006-09-28 15:23 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-09-28 6:51 about performace nagesh kollu
2006-09-28 14:12 ` David Chatterton
2006-09-28 15:16 ` Eric Sandeen
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox