[THIN] Re: Disk I/O problem
- From: "Joe Shonk" <joe.shonk@xxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Mon, 18 Dec 2006 11:02:30 -0700
Try turning off App Data redirection and see what happens.
Joe
_____
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Michael Boggan
Sent: Monday, December 18, 2006 10:57 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Disk I/O problem
We monitor them with NetIQ and other utils. The CPU and Memory useage are
minimal but the Disk I/O is through the roof.
Thanks,
Michael Boggan
_____
Date: Mon, 18 Dec 2006 17:48:16 +0100
From: mrdizzz@xxxxxxxxx
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Disk I/O problem
How are you certain that local disk I/O is your bottleneck?
On 12/18/06, Michael Boggan <mboggan@xxxxxxxxxxx > wrote:
We do redirect the application data. It is redirected to a network share so
that should eliminate some local disk I/o, not create more.
Thanks,
Michael Boggan
_____
Date: Mon, 18 Dec 2006 11:24:33 +0100
From: mrdizzz@xxxxxxxxx
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Disk I/O problem
Hi Michael,
Make sure that appplication data is not being "folder redirected"?
Regards,
Michel.
On 12/12/06, Michael Boggan < mboggan@xxxxxxxxxxx> wrote:
It would appear that pnagent is constantly writing to this folder. Here is
a sample of what filemon returned. Any idea what this is? This is just a
very small sample from a few seconds of data. PNAgent appears to be
hammering the disk.
----------------------------------------------------------------------------
-------------------------------------------
10:40:13 AM pnagent.exe:11624 WRITE K:\Documents and Settings\gsmith\Local
Settings\Application Data\Microsoft\Windows\UsrClass.dat SUCCESS Offset:
110592 Length: 4096
10:40:13 AM pnagent.exe:11624 WRITE K:\Documents and Settings\gsmith\Local
Settings\Application Data\Microsoft\Windows\UsrClass.dat SUCCESS Offset:
114688 Length: 4096
10:40:13 AM pnagent.exe:11624 WRITE K:\Documents and Settings\gsmith\Local
Settings\Application Data\Microsoft\Windows\UsrClass.dat SUCCESS Offset:
118784 Length: 4096
10:40:13 AM pnagent.exe:11624 WRITE K:\Documents and Settings\gsmith\Local
Settings\Application Data\Microsoft\Windows\UsrClass.dat SUCCESS Offset:
4096 Length: 65536
10:40:13 AM pnagent.exe:11624 WRITE K:\Documents and Settings\gsmith\Local
Settings\Application Data\Microsoft\Windows\UsrClass.dat SUCCESS Offset:
69632 Length: 53248
10:40:14 AM pnagent.exe:11624 WRITE K:\Documents and Settings\gsmith\Local
Settings\Application Data\Microsoft\Windows\UsrClass.dat SUCCESS Offset: 0
Length: 512
10:40:14 AM pnagent.exe:11624 WRITE K:\Documents and Settings\gsmith\Local
Settings\Application Data\Microsoft\Windows\UsrClass.dat SUCCESS Offset: 0
Length: 4096
----------------------------------------------------------------------------
-------------------------------------------
Thanks,
Michael Boggan
_____
Subject: [THIN] Re: Disk I/O problem
Date: Tue, 12 Dec 2006 10:27:50 -0500
From: MShrewsbury@xxxxxxxxxxxxxxx <mailto:MShrewsbury@xxxxxxxxxxxxxxx>
To: thin@xxxxxxxxxxxxx
I'd try running filemon to determine what task is causing the I/O. Also as a
hunch I'd check your AV.
Matthew Shrewsbury
Network Manager
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Michael Boggan
Sent: Tuesday, December 12, 2006 10:19 AM
To: thin list
Subject: [THIN] Disk I/O problem
We are in the process of doing a proof of concept with PS4 and new hardware,
etc. We have 3 PS4 servers built. 1 as the DC, 1 as a published desktop
server and 1 as the published applications server. Users login to a
published desktop and get there icons via the PNAgent running for each
desktop. The applications are all published from the 3rd server. We have
roaming profiles and the desktop and application data folders are mapped to
individual folders on the network so that they follow them around.
We are having problems with disk writes on the desktop server. For some
reason the disk I/O is going crazy on that server alone. SO much so that
the server lags tremendously. ANy have any idea why this might be
happening? If anyone knows of a way to determine what is actually being
written too, that would help as well. We have tried NetIQ and other
monitors but cannot find anything that tells us what is actually being
written too on the disk.
Thanks,
Michael Boggan
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