As well as not muxing the savesets on tape to help tremendously with restore 
times.
--S

-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On 
Behalf Of Francis Swasey
Sent: Monday, January 14, 2008 9:41 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Upgrade from 7.2 to 7.3.3

My answer to that is that yes, the initial backup is the same speed as going to 
tape (after all, it is the same network bottleneck between the client and the 
server).  However, the clone and subsequent stage from disk to tape is done on 
the local host so no network latency is involved and will drive the tapes at 
their capacity so you won't have shoe-shining.  So, you'll use fewer tapes and 
the tape drives won't wear out as fast either.

Frank

On 1/14/08 10:21 AM, Greggs, Dana wrote:
> In my real world usage backup to disk at best was only as fast as
> backup to tape. As you stated, for me the bottleneck was copper Gig NICs'.
> Using LTO2 drives on a FC Library I easily sustain write speeds of
> 50-70 MB/sec and burst up to the max (80MB). On our LTO2 drives I
> stuff 500-800GB per tape (DB backups) and on our LTO3 drives I stuff
> 1TB to 2.4TB per tape (again DB backups). We will be going to LTO4 for
> security compliance purposes to use hardware encryption. Our Library
> and the drives are all FC attached to a SAN. The heavy hitter clients
> (DB
> Servers) will be FC attached storage nodes backing up directly to the
> Library. I get the best performance as you have stated many times in
> the past by sending as much data as I can to 1 drive. One drive for
> File systems and one drive for Database backups.
>
> That said I agree with your thread. My only problem is that backup
> isn't "sexy" and is generally treated as the step child (unless
> something needs restored) so any money spent requires a hard sell. I
> have been promised for years that I'll get Storage space on the SAN to
> do disk to disk then disk to tape but that has yet to happen. I backup
> 7-12 TB daily using 4 Networker Servers that simply rock, day in and day out.
>
> Thanks,
>
> Dana
>
> -----Original Message-----
> From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU]
> On Behalf Of Curtis Preston
> Sent: Saturday, January 12, 2008 12:29 AM
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Subject: Re: Upgrade from 7.2 to 7.3.3
>
> And I stand by that presentation! ;)
>
> Notice I did not say tape is dead.  I said tape-only backup systems
> are dead.  The difference in speed between most backups and most tape
> drives is too far.  IMHO, you must go to disk first to do it right.
> And now that dedupe is here and real, you can use disk for more than
> staging -- you can hold all onsite backups on disk for about the same
> cost as doing it on tape.
>
> ---
> W. Curtis Preston
> Backup Blog @ www.backupcentral.com
> VP Data Protection, GlassHouse Technologies
>
> -----Original Message-----
> From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU]
> On Behalf Of David Magda
> Sent: Tuesday, January 08, 2008 5:31 PM
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Subject: Re: [Networker] Upgrade from 7.2 to 7.3.3
>
> At LISA '06 W. Curtis Preston gave a presentation called "Seriously,
> Tape-Only Backup Systems Are Dead".
>
> It's available online at USENIX's site:
>
>       http://www.usenix.org/event/lisa06/tech/#friday
>
> Though it may be of interest to the list.
>
> On Jan 8, 2008, at 12:05, Matthew Huff wrote:
>> Yep.
>>
>> We have a high-bandwidth, low latency network with enough clients and
>> data to keep it going, although we will probably go from 6 x LTO-2 to
>> 4 x LTO-4.
>>
>> -----Original Message-----
>>> From: Teresa Biehler [mailto:tpbsys AT rit DOT edu]
>>> Sent: Tuesday, January 08, 2008 12:01 PM
>>> To: EMC NetWorker discussion; Matthew Huff
>>> Subject: RE: [Networker] Upgrade from 7.2 to 7.3.3
>>>
>>> How do you plan to feed the LTO-4 tapes enough data to keep them
>>> busy without using staging?
>
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--
Frank Swasey                    | http://www.uvm.edu/~fcs
Sr Systems Administrator        | Always remember: You are UNIQUE,
University of Vermont           |    just like everyone else.
   "I am not young enough to know everything." - Oscar Wilde (1854-1900)

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