Cloning is slow because it ( not a techie term) DE-STREAMS the save sets.  This 
means that you may have servers 1-8 (depends on your config) saving to a single 
tape.  NetWorker, when cloning, will follow server 1 across all tapes it spans 
until completion, then move onto server 2, etc...  This has been our 
experience...
 
Feel free to correct me if this is misinformation...
 
Carter Fowler
Hardware Services Technician
The City of London
600 - 380 Wellington St.
London, ON, CA, N6C 5B5
Off: 519.661.5711
cfowler AT london DOT ca
 

        -----Original Message----- 
        From: Paul Crossman [mailto:pcrossma AT WILDFIRE DOT COM] 
        Sent: Wed 4/9/2003 4:31 PM 
        To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU 
        Cc: 
        Subject: Re: Why is cloning so slow ?
        
        

        It depends on how interleaved the tape is.  If you've got 32 parallel
        sessions, of which one is the informix backup, then the cloning will be
        slow.  If you've got 8 parallel sessions, you're cloning will be
        noticibly faster.
        
        I get between 5 and 25 MB/s on my SDLT220 drives.
        
        Paul C.
        
        On Wed, 2003-04-09 at 16:27, Julio Porras wrote:
        
        > I am cloning an Informix full archive using our HP A4846A tape 
library (with
        > 2 DLT 7000 tape drives) and it's taking too long to run. It's going 
at 2500
        > to 3000 KB/s (for a 90GB data volume). Is this speed normal? What max 
speed
        > should I expect for my hardware?
        >
        > Thx,
        > Julio Porras
        > Especialista de Sistemas
        > CVG Venalum
        > 286-9506898
        > 416-7985875
        >
        >
        > --
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        --
        Paul Crossman @ Wildfire Communications, Inc.
        Senior Unix Systems Administrator
        Phone & Fax:  781-778-3517
        Email:  pcrossma AT wildfire DOT com
        
        
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        Note: To sign off this list, send a "signoff networker" command via 
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