[OpenAFS] ramdisk Problems under 2.6 kernel
Sven Oehme
oehmes@de.ibm.com
Wed, 6 Jul 2005 09:51:38 +0200
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because you don't reach high enough throughput with memcache.
with memcache i am limited to around 25 mb/sec. with disk cache i reach 30
mb/sec which is the local drive.
with a formatted ramdisk as diskcache i get 50 - 60 mb/sec
so lets see if we can get a fix for /dev/shm ... because ramdisk is anyway
deprecated.
btw. the workaround is to create a file in /dev/shm with dd, format it ,
mount it as loopdevice :-)
Sven
"ted creedon" <tcreedon@easystreet.com>
Sent by: openafs-info-admin@openafs.org
05/07/2005 21:59
To
cc
<openafs-info@openafs.org>
Subject
RE: [OpenAFS] ramdisk Problems under 2.6 kernel
Why is that?
tedc
From: openafs-info-admin@openafs.org
[mailto:openafs-info-admin@openafs.org] On Behalf Of Sven Oehme
Sent: Tuesday, July 05, 2005 10:08 AM
To: Ryan Underwood
Cc: openafs-info@openafs.org
Subject: Re: [OpenAFS] ramdisk Problems under 2.6 kernel
it's simple , it's to slow ..
Sven
Ryan Underwood <nemesis-lists@icequake.net>
Sent by: openafs-info-admin@openafs.org
05/07/2005 17:46
To
openafs-info@openafs.org
cc
Subject
Re: [OpenAFS] ramdisk Problems under 2.6 kernel
On Mon, Jul 04, 2005 at 11:38:14PM +0200, Sven Oehme wrote:
> Hi ,
>
> we have identified some Ramdisk Problems under 2.6 kernels compiled
on
> i386
> has anybody ever tried using tmpfs for the cache disk ?
What about using -memcache instead?
--
Ryan Underwood, <nemesis@icequake.net>
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<br><font size=2 face="sans-serif">because you don't reach high enough
throughput with memcache. </font>
<br><font size=2 face="sans-serif">with memcache i am limited to around
25 mb/sec. with disk cache i reach 30 mb/sec which is the local drive.</font>
<br><font size=2 face="sans-serif">with a formatted ramdisk as diskcache
i get 50 - 60 mb/sec</font>
<br><font size=2 face="sans-serif">so lets see if we can get a fix for
/dev/shm ... because ramdisk is anyway deprecated. </font>
<br><font size=2 face="sans-serif">btw. the workaround is to create a file
in /dev/shm with dd, format it , mount it as loopdevice :-)</font>
<br>
<br><font size=2 face="sans-serif">Sven</font>
<br>
<br>
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<td width=40%><font size=1 face="sans-serif"><b>"ted creedon"
<tcreedon@easystreet.com></b> </font>
<br><font size=1 face="sans-serif">Sent by: openafs-info-admin@openafs.org</font>
<p><font size=1 face="sans-serif">05/07/2005 21:59</font>
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<td valign=top><font size=1 face="sans-serif"><openafs-info@openafs.org></font>
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<td valign=top><font size=1 face="sans-serif">RE: [OpenAFS] ramdisk Problems
under 2.6 kernel</font></table>
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<br><font size=2 color=blue face="Arial">Why is that?</font>
<br><font size=3> </font>
<br><font size=2 color=blue face="Arial">tedc</font>
<br>
<br>
<hr><font size=2 face="Tahoma"><b>From:</b> openafs-info-admin@openafs.org
[mailto:openafs-info-admin@openafs.org] <b>On Behalf Of </b>Sven Oehme<b><br>
Sent:</b> Tuesday, July 05, 2005 10:08 AM<b><br>
To:</b> Ryan Underwood<b><br>
Cc:</b> openafs-info@openafs.org<b><br>
Subject:</b> Re: [OpenAFS] ramdisk Problems under 2.6 kernel</font><font size=3><br>
</font>
<br><font size=2 face="sans-serif"><br>
it's simple , it's to slow ..</font><font size=3> <br>
</font><font size=2 face="sans-serif"><br>
Sven</font><font size=3><br>
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<td width=44%><font size=1 face="sans-serif"><b>Ryan Underwood <nemesis-lists@icequake.net></b>
<br>
Sent by: openafs-info-admin@openafs.org</font><font size=3> </font>
<p><font size=1 face="sans-serif">05/07/2005 17:46</font><font size=3>
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<div align=right><font size=1 face="sans-serif">To</font></div>
<td width=81% valign=top><font size=1 face="sans-serif">openafs-info@openafs.org</font><font size=3>
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<div align=right><font size=1 face="sans-serif">cc</font></div>
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<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td valign=top><font size=1 face="sans-serif">Re: [OpenAFS] ramdisk Problems
under 2.6 kernel</font></table>
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<br>
On Mon, Jul 04, 2005 at 11:38:14PM +0200, Sven Oehme wrote:<br>
> Hi ,<br>
> <br>
> we have identified some Ramdisk Problems under 2.6 kernels
compiled on<br>
> i386<br>
> has anybody ever tried using tmpfs for the cache disk
?<br>
<br>
What about using -memcache instead?<br>
<br>
-- <br>
Ryan Underwood, <nemesis@icequake.net><br>
_______________________________________________<br>
OpenAFS-info mailing list<br>
OpenAFS-info@openafs.org<br>
https://lists.openafs.org/mailman/listinfo/openafs-info</tt></font><font size=3><br>
</font>
<br>
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