On May 25, 2007, at 11:22 AM, Roch Bourbonnais wrote:
Le 22 mai 07 à 01:11, Nicolas Williams a écrit :
On Mon, May 21, 2007 at 06:09:46PM -0500, Albert Chin wrote:
But still, how is tar/SSH any more multi-threaded than tar/NFS?
It's not that it is, but that NFS sync semantics and ZFS sync
Le 22 mai 07 à 16:23, Dick Davies a écrit :
Take off every ZIL!
http://number9.hellooperator.net/articles/2007/02/12/zil-
communication
Cause client corrupt but also database corruption and just about
anything that carefully manages data.
Yes the zpool will survive, but it may be t
Le 22 mai 07 à 03:18, Frank Cusack a écrit :
On May 21, 2007 6:30:42 PM -0500 Nicolas Williams
<[EMAIL PROTECTED]> wrote:
On Mon, May 21, 2007 at 06:21:40PM -0500, Albert Chin wrote:
On Mon, May 21, 2007 at 06:11:36PM -0500, Nicolas Williams wrote:
> On Mon, May 21, 2007 at 06:09:46PM -0500,
Le 22 mai 07 à 01:21, Albert Chin a écrit :
On Mon, May 21, 2007 at 06:11:36PM -0500, Nicolas Williams wrote:
On Mon, May 21, 2007 at 06:09:46PM -0500, Albert Chin wrote:
But still, how is tar/SSH any more multi-threaded than tar/NFS?
It's not that it is, but that NFS sync semantics and ZFS
Le 22 mai 07 à 01:11, Nicolas Williams a écrit :
On Mon, May 21, 2007 at 06:09:46PM -0500, Albert Chin wrote:
But still, how is tar/SSH any more multi-threaded than tar/NFS?
It's not that it is, but that NFS sync semantics and ZFS sync
semantics
conspire against single-threaded performanc
>> My first guess is the NFS vs array cache-flush issue. Have you
>> configured the 6140 to ignore SYNCHRONIZE_CACHE requests? That'll
>> make a huge difference for NFS clients of ZFS file servers.
>
[EMAIL PROTECTED] said:
> Doesn't setting zfs:zfs_nocacheflush=1 achieve the same result:
> ht
On Mon, May 21, 2007 at 13:23:48 -0800, Marion Hakanson wrote:
>Albert Chin wrote:
>> Why can't the NFS performance match that of SSH?
>
> My first guess is the NFS vs array cache-flush issue. Have you
> configured the 6140 to ignore SYNCHRONIZE_CACHE requests? That'll
> make a huge difference f
On Tue, May 22, 2007 at 03:23:46PM +0100, Dick Davies wrote:
>
> Take off every ZIL!
>
> http://number9.hellooperator.net/articles/2007/02/12/zil-communication
Interesting. With "set zfs:zil_disable = 1", I get:
1. [copy 400MB of gcc-3.4.3 via rsync/NFS]
# mount file-server:/opt/test /mn
On Tue, May 22, 2007 at 10:04:34AM +0200, [EMAIL PROTECTED] wrote:
>
> >On Mon, May 21, 2007 at 06:21:40PM -0500, Albert Chin wrote:
> >> On Mon, May 21, 2007 at 06:11:36PM -0500, Nicolas Williams wrote:
> >> > On Mon, May 21, 2007 at 06:09:46PM -0500, Albert Chin wrote:
> >> > > But still, how is
Take off every ZIL!
http://number9.hellooperator.net/articles/2007/02/12/zil-communication
On 22/05/07, Albert Chin
<[EMAIL PROTECTED]> wrote:
On Mon, May 21, 2007 at 06:11:36PM -0500, Nicolas Williams wrote:
> On Mon, May 21, 2007 at 06:09:46PM -0500, Albert Chin wrote:
> > But still, how
>On Mon, May 21, 2007 at 06:21:40PM -0500, Albert Chin wrote:
>> On Mon, May 21, 2007 at 06:11:36PM -0500, Nicolas Williams wrote:
>> > On Mon, May 21, 2007 at 06:09:46PM -0500, Albert Chin wrote:
>> > > But still, how is tar/SSH any more multi-threaded than tar/NFS?
>> >
>> > It's not that it is
On May 21, 2007 6:30:42 PM -0500 Nicolas Williams
<[EMAIL PROTECTED]> wrote:
On Mon, May 21, 2007 at 06:21:40PM -0500, Albert Chin wrote:
On Mon, May 21, 2007 at 06:11:36PM -0500, Nicolas Williams wrote:
> On Mon, May 21, 2007 at 06:09:46PM -0500, Albert Chin wrote:
> > But still, how is tar/SSH
On Mon, May 21, 2007 at 06:21:40PM -0500, Albert Chin wrote:
> On Mon, May 21, 2007 at 06:11:36PM -0500, Nicolas Williams wrote:
> > On Mon, May 21, 2007 at 06:09:46PM -0500, Albert Chin wrote:
> > > But still, how is tar/SSH any more multi-threaded than tar/NFS?
> >
> > It's not that it is, but t
On Mon, May 21, 2007 at 06:11:36PM -0500, Nicolas Williams wrote:
> On Mon, May 21, 2007 at 06:09:46PM -0500, Albert Chin wrote:
> > But still, how is tar/SSH any more multi-threaded than tar/NFS?
>
> It's not that it is, but that NFS sync semantics and ZFS sync
> semantics conspire against single
On Mon, May 21, 2007 at 06:09:46PM -0500, Albert Chin wrote:
> But still, how is tar/SSH any more multi-threaded than tar/NFS?
It's not that it is, but that NFS sync semantics and ZFS sync semantics
conspire against single-threaded performance.
___
zfs-
On Mon, May 21, 2007 at 04:55:35PM -0600, Robert Thurlow wrote:
> Albert Chin wrote:
>
> >I think the bigger problem is the NFS performance penalty so we'll go
> >lurk somewhere else to find out what the problem is.
>
> Is this with Solaris 10 or OpenSolaris on the client as well?
Client is RHEL
Albert Chin wrote:
Well, there is no data on the file server as this is an initial copy,
Sorry Albert, I should have noticed that from your e-mail :-(
I think the bigger problem is the NFS performance penalty so we'll go
lurk somewhere else to find out what the problem is.
Is this with Sol
On Mon, May 21, 2007 at 02:55:18PM -0600, Robert Thurlow wrote:
> Albert Chin wrote:
>
> >Why can't the NFS performance match that of SSH?
>
> One big reason is that the sending CPU has to do all the comparisons to
> compute the list of files to be sent - it has to fetch the attributes
> from bot
Albert Chin wrote:
Why can't the NFS performance match that of SSH?
One big reason is that the sending CPU has to do all the comparisons to
compute the list of files to be sent - it has to fetch the attributes
from both local and remote and compare timestamps. With ssh, local
processes at eac
[EMAIL PROTECTED] said:
> Why can't the NFS performance match that of SSH?
Hi Albert,
My first guess is the NFS vs array cache-flush issue. Have you configured
the 6140 to ignore SYNCHRONIZE_CACHE requests? That'll make a huge difference
for NFS clients of ZFS file servers.
Also, you might ma
We're testing an X4100M2, 4GB RAM, with a 2-port 4GB Fibre Channel
QLogic connected to a 2GB Fibre Channel 6140 array. The X4100M2 is
running OpenSolaris b63.
We have 8 drives in the Sun 6140 configured as individual RAID-0
arrays and have a ZFS RAID-Z2 array comprising 7 of the drives (for
testin
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