A better question for improving throughput "might be" can EMC kick their
programmers in the tush and get them to use more than one processor!??

You pay big bucks for a Quad-Processor + the RAM to make it efficient you
make sure each processor has the fastest ram-cache available and then we buy
software that only uses ONE PROCESSOR!?!

With compression, thousands of clients and encryption, the use of multiple
processors would be more than convenient.

This in my humble opinion... /ALE

P. S. Congo-Rats on the LTO4! Let us know if it is worth the upgrade, right
now it does not appear to make sense to buy it.

-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Tim Verbois
Sent: Wednesday, January 23, 2008 2:44 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] Cloning parallelism


Hello,

Environment:

VTL
L700 (LTO3 + LTO2 drives)
Legato 7.3.2 from SUN
Server + storage node

is it possible to have the parallelism on a cloning set to 2?  I changed 
the setting in the java interface, but it doesn't change a thing.

Why do I want to do that?  We clone from VTL to L700 LTO3 tape drives.  
The speed of an LTO3 drive is 70 MB/s native and can reach 100 MB when 
compressed.  Our VTL can supply data at a speed of 70 MB/s.  A client 
can do a restore at max 50 MB/s.  So while we clone at a speed of 70 
MB/s compressable data, we lose at least 20 MB/s average speed for 
cloning.  For restores, our tape is to fast, we would be satisfied with 
an everage restore speed of 40MB/s. 

The problem we have is that we need the top speed for cloning because of 
the small time window for cloning (backupping every day and the full 
weekend, needs cloning at top speeds during all the free time). 

In a few weeks we start using LTO4, this is going to make the loss of 
speed even bigger, much bigger.  Can this be solved?

-- 
Tim Verbois
Unix Team
EDS-Telindus
02/553.71.73

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