I'd tell you I've got the magic voodoo over here Paul, but then you'd want it.  
And If I'm gonna give up the goods I'd better get dinner and dancing first. =P
 
Our Exchange Fulls running by themselves over GigE to a DSSU sitting around 
doing nothing else does about 100MB/sec, until it hits the logs.  Even then, 
its very fast but the average time rounds out to 80MB/sec, still respectable.  
My fastest backup until that point was a Redhat 3 /  Oracle 9 Database at 
55MB/sec (give or take Archive logs.)  In my Exchange case, the secret has been 
number of spindles and drive speeds on the SAN.  We did serious I/O testing on 
the Exchange server's storage and went for performance all the way.  I think 
each storage group and logs are their own 8 disk raid5 w/ 146GB 15K FC drives 
in a Hitatchi SAN.  Surprisingly, I got a Sun StorEdge 5320 running remote NDMP 
backups to LTO3 at 100MB/sec first try, yesterday!  That was purely test data, 
and it remains to be seen if it will maintain that after we load up terabytes 
of data.  (I don't manage the SAN or the NAS, so all my secret sauce is 
definitely someone else's.)
 
I haven't done a brick level backup of Exchange since I learned about Recovery 
Storage Groups, and that was on Arcserve, or whatever it was called before CA 
bought it.  That was the 90's and all my memories from the 90's are bad, so 
lets not go there.  I have to admit I've never run BSD.  Sounds like fun, and 
the devil logo has definitely got it going on!  Silly penguin.
 
-Jonathan
 


________________________________

From: Paul Keating [mailto:pkeating at bank-banque-canada.ca] 
Sent: Thursday, May 10, 2007 3:26 PM
To: K Chapman; Martin, Jonathan; Anas Kayal; veritas-bu at 
mailman.eng.auburn.edu
Subject: RE: [Veritas-bu] Exchange Mailbox Backup


I've never seen 100MB/s, let alone "better than" 100MB/s on a single GigE link, 
for ANY client type, let alone Windows, or Exchange, so colour me surprised.
 
:o)
 
 
-- 

        -----Original Message-----
        From: veritas-bu-bounces at mailman.eng.auburn.edu 
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of K Chapman
        Sent: May 10, 2007 3:22 PM
        To: Martin, Jonathan; Anas Kayal; veritas-bu at mailman.eng.auburn.edu
        Subject: Re: [Veritas-bu] Exchange Mailbox Backup
        
        
        you are seeing this speed doing brick level, or are you seeing it with 
info store backups?  ive never seen brick level go too fast on any type of 
disk/net/tape drive combo (5.5/2000/2003).  info stores go quite fast in all 
cases (as expected).
        
         
        aaarrrggghhh!!!!
        FreeBSD rocks

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