We misread the guides when setting up our new dd670's about 6 months ago and 
currently have 9 active LSU's.  Prior to using OST on our old DD's we had 
multiple directories under /backup so we could easily keep tabs on the 
compression and replication performance of the different apps or systems we 
were backing up.  We setup the LSU's on our new dd670's using OST with the same 
theory in mind and have not seen any issues with compression or performance so 
probably won't be changing it.  As a side note, with our pre-ost setup we were 
also successfully using CIFS and NFS simultaneously without realizing that, 
technically, it wasn't supported either.

Mark Glazerman
Desk: 314-889-8282
Cell: 618-520-3401
 please don't print this e-mail unless you really need to


-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu 
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of X_S
Sent: Wednesday, April 20, 2011 12:18 PM
To: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: [Veritas-bu] DD LSU question

Can someone tell me if the number of LSUs configured on a system effects dedupe 
ratio and overall performance of the DD box?  i see that in best practices it 
is recommended that one LSU is created per Netbackup environment.  i do have 
more than LSU configured in one NB environment but i wonder if i did utilize 
only one LSU, if the global and local compression sizes would be better.  
thanks for your input.

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