I read through the document you mentioned and it does not cover the topic of
specifying the block or record size.  We want to specify a large
block/record sizes when writing to disk.  Currently we are only getting 64KB
per write.

--
Mike Cannon
mikec AT clemson DOT edu
864.650.2577 (Cell)
864.656.3809 (Office)

Clemson University
Computing & Information Technology
340 Computer Court
Anderson, SC  29625


-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Terry Lemons
Sent: Monday, February 04, 2008 2:37 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Legato Networker 7.3

Hi Matthew

Check out the NetWorker Performance Tuning guide for your release.  In
particular, look into using bigasm.  This will allow you to eliminate
from consideration the 'read' side of the equation, because bigasm
constructs data in memory.

Hope this helps
tl 

-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Matthew Powell
Sent: Monday, February 04, 2008 2:25 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] Legato Networker 7.3

We are trying to build a file system tuned specifically to receive
inbound data from Legato Networker 7.3. We are trying to get our write
size per second to match what we have specified in the Device block size
in the device configuration setting in the file type device we have
specified to back up to. We have set the Device block size to 1024 KB,
and the volume block size shows 1024 KB. When we did a test run of this
configuration then we only got speeds of 64 kb/s. We used the formula as
follows to determine the speed:

 

( Using IOSTAT on Solaris 10 we did the following calculation which
yielded ~64 kb/s  (Mw/s * 1024)/ (w/s)

 

Does anyone have any thoughts on tuning this? The file system we are
trying to fine tune is SAM/QFS. 


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