From: David Chatterton <chatz@melbourne.sgi.com>
To: nagesh kollu <nagesh_20k@yahoo.co.in>
Cc: linux-xfs@oss.sgi.com
Subject: Re: about performace
Date: Fri, 29 Sep 2006 00:12:20 +1000 [thread overview]
Message-ID: <451BD844.4000509@melbourne.sgi.com> (raw)
In-Reply-To: <20060928065113.70796.qmail@web8511.mail.in.yahoo.com>
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
>
>
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--
David Chatterton
XFS Engineering Manager
SGI Australia
next prev parent reply other threads:[~2006-09-28 15:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-28 6:51 about performace nagesh kollu
2006-09-28 14:12 ` David Chatterton [this message]
2006-09-28 15:16 ` Eric Sandeen
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