> AFAIK, there's no way to turn caching completely off in Linux.
It is my understanding that any file that is opened with the O_DIRECT
option bypasses the Linux cache. I believe that this support was added in
SP2 to SLES8.
I know that Oracle 10g will open its files with this option if the init.o
Rob van der Heij wrote:
>What we are seeing lately with some installations is that Linux
>appears so eager to keep data in memory (i.e. data backed by files on
>disk) that it starts to swap out processes. That does not seem to be
>the right way...
It's not a simple either-or decision. In many ca
On Wed, 29 Sep 2004 08:11:24 -0500, James Melin
<[EMAIL PROTECTED]> wrote:
> So how do you set /proc/sys/vm/bdflush so that it remains from IPL to IPL?
Easiest is probably through /etc/sysctl.conf and running sysctl as
part of the boot process. Once you know what you need in there.
The thing tha
So how do you set /proc/sys/vm/bdflush so that it remains from IPL to IPL?
Ihno Krumreich
<[EMAIL PROTECTED]>
On Thu, Sep 16, 2004 at 07:04:52PM -0400, David Boyes wrote:
> > We are on STK V2X DASD array. We can do very well without Linux adding
> > further caching. Is there a way to tell Linux not to cache the DASD?
>
> AFAIK, there's no way to turn caching completely off in Linux. You can
> reduce the a
n 390 Port [mailto:[EMAIL PROTECTED] Behalf Of
> Fargusson.Alan
> Sent: Friday, September 17, 2004 11:35 AM
> To: [EMAIL PROTECTED]
> Subject: [Possible Spam] Re: Linux LPAR - how to drop caching
>
>
> This has nothing to do with the "everything is a file" philoso
>
> This takes us back to the wonderful world of Logical IOCS vs Physical IOCS. In the
> Mainframe world there as always been a diference between Logical I/O (the program's
> write of 80 bytes) and the Physical I/O (the writing of a 4K data block to a device
> by an operating system). In the PC
something about mmap and fault loading, but it
could be done.
-Original Message-
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of
Ward, Garry
Sent: Friday, September 17, 2004 8:45 AM
To: [EMAIL PROTECTED]
Subject: Re: [Possible Spam] Re: Linux LPAR - how to drop caching
This takes us
bject: [Possible Spam] Re: Linux LPAR - how to drop caching
This has nothing to do with the "everything is a file" philosophy. It has to do with
the fact that most *ix systems don't have a layer below them to do buffering.
Actually even when you do the overhead of calling down to the dr
CTED] Behalf Of
Phil Smith III
Sent: Friday, September 17, 2004 4:13 AM
To: [EMAIL PROTECTED]
Subject: Re: Linux LPAR - how to drop caching
Ranga Nathan <[EMAIL PROTECTED]> wrote:
>We are on STK V2X DASD array. We can do very well without Linux adding
>further caching. Is there a way to
Ranga Nathan <[EMAIL PROTECTED]> wrote:
>We are on STK V2X DASD array. We can do very well without Linux adding
>further caching. Is there a way to tell Linux not to cache the DASD?
As David said, there's apparently no way to turn this off. For several
years, I've been asking folks this same ques
> We are on STK V2X DASD array. We can do very well without Linux adding
> further caching. Is there a way to tell Linux not to cache the DASD?
AFAIK, there's no way to turn caching completely off in Linux. You can
reduce the amount of storage Linux uses for caching by reducing the size
of the LPA
We are on STK V2X DASD array. We can do very well without Linux adding
further caching. Is there a way to tell Linux not to cache the DASD?
__
Ranga Nathan / CSG
Systems Programmer - Specialist; Technical Services;
BAX Global Inc. Irvine-California
Tel: 714-4
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