Hi,
I've been trying to get swap on lustre to work with not much success
using blockdev_attach and the resulting lloop0 device and using
losetup and the resulting loop device. This thread
(http://www.mail-archive.com/lustre-discuss@lists.lustre.org/msg00856.html)
claims that it works, but in all m
On 08/17/2011 10:43 PM, John Hanks wrote:
> Hi,
>
> I've been trying to get swap on lustre to work with not much success
> using blockdev_attach and the resulting lloop0 device and using
> losetup and the resulting loop device. This thread
> (http://www.mail-archive.com/lustre-discuss@lists.lustre.
On Wed, 2011-08-17 at 22:57 -0400, Joe Landman wrote:
> The lustre client (and most NFS or even network block devices) all do
> memory allocation of buffers ... which is anathema to migrating pages
> out to disk. You can easily wind up in a "death spiral" race condition
> (and it sounds like yo
On Wed, Aug 17, 2011 at 8:57 PM, Joe Landman
wrote:
> On 08/17/2011 10:43 PM, John Hanks wrote:
> As a rule of thumb, you should try to keep the path to swap as simple as
> possible. No memory/buffer allocations on the way to a paging event if
> you can possibly do this.
I do have a long path th
John Hanks wrote:
> FWIW, mounting a file on lustre via loopback to provide a local
> scratch filesystem works really well.
>
Mostly, but you probably need a kernel patch. See
https://bugzilla.lustre.org/show_bug.cgi?id=22004
Kevin
___
Lustre-disc
On 08/17/2011 11:42 PM, David Dillow wrote:
> On Wed, 2011-08-17 at 22:57 -0400, Joe Landman wrote:
>> The lustre client (and most NFS or even network block devices) all do
>> memory allocation of buffers ... which is anathema to migrating pages
>> out to disk. You can easily wind up in a "death s
On 2011-08-17, at 8:43 PM, John Hanks wrote:
> I've been trying to get swap on lustre to work with not much success
> using blockdev_attach and the resulting lloop0 device and using
> losetup and the resulting loop device. This thread
> (http://www.mail-archive.com/lustre-discuss@lists.lustre.org/m
Jason
-Original Message-
From: lustre-discuss-boun...@lists.lustre.org
[mailto:lustre-discuss-boun...@lists.lustre.org] On Behalf Of John Hanks
Sent: giovedì, 18. agosto 2011 05:55
To: land...@scalableinformatics.com
Cc: lustre-discuss@lists.lustre.org
Subject: Re: [Lustre-discuss] Swap over l
On Thu, Aug 18, 2011 at 12:36 AM, Temple Jason wrote:
> Hello,
>
> I experimented with swap on lustre in as many ways as possible (without
> touching the code), and had the shortest path possible to no avail. The code
> is not able to handle it at all, and the system always hung.
>
> Without s
c: lustre-discuss@lists.lustre.org
> Subject: Re: [Lustre-discuss] Swap over lustre
>
> On Wed, Aug 17, 2011 at 8:57 PM, Joe Landman
> wrote:
>> On 08/17/2011 10:43 PM, John Hanks wrote:
>> As a rule of thumb, you should try to keep the path to swap as simple as
>>
on behalf of John Hanks
Sent: Thu 8/18/2011 7:30 AM
To: Temple Jason
Cc: lustre-discuss@lists.lustre.org
Subject: Re: [Lustre-discuss] Swap over lustre
On Thu, Aug 18, 2011 at 12:36 AM, Temple Jason wrote:
> Hello,
>
> I experimented with swap on lustre in as many ways as possible
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