Ed Was that restores to ALL clients, or single client ? As you say, may suit some environments, and not others (have a UNIX site that multiplex settings were VERY low and backups took 50 hours). Increased this setting, reconfigured the schedule and got this down to 13 hours! Also used a 2nd tape drive.
But, may not suit everyone! I would expect restore to take a little longer though! I am glad for all of this input though (Ed, Paul, ect) as its nice to get a BETTER understanding in case, as Paul quite rightly says, something goes HORRIBLY wrong. And at the end of the day, it can only be myself to blame. But I have not chosen numbers out of a hat by the way :-) Care and planning and testing was done! Regards Simon Weaver 3rd Line Technical Support Windows Domain Administrator EADS Astrium Limited, B23AA IM (DCS) Anchorage Road, Portsmouth, PO3 5PU Email: [EMAIL PROTECTED] -----Original Message----- From: Ed Wilts [mailto:[EMAIL PROTECTED] Sent: 31 July 2006 12:33 To: Liddle, Stuart Cc: WEAVER, Simon; 'Mansell, Richard'; veritas-bu@mailman.eng.auburn.edu Subject: Re: [Veritas-bu] Multiplexing On Sun, Jul 30, 2006 at 11:58:54PM -0700, Liddle, Stuart wrote: > Fine....believe what you want....but the numbers don't lie. > > If you ever try any testing of this you will see that restores are > significantly faster when you do them from non-multiplexed tapes. There are 2 significant factors that affect the speed the restores: 1. How many restores are you doing at the same time? If it's more than 1, then multiplexing will really hurt. 2. Are you doing single-file or multi-file restores? If it's a single-file restore, then I don't believe that multiplexing makes a lot of difference (from what I've personally seen). If you're doing a large multi-file restore, then multiplexing can cause a major performance hit. I was talking to a Legato customer last week who said that he was multiplexing 20-40 per tape and small restores could take 8+ hours. As we always say, though, test and see what's acceptable in your environment. We all trade off backup times vs restore times and what's acceptable for you may not be acceptable for me. .../Ed -- Ed Wilts, Mounds View, MN, USA mailto:[EMAIL PROTECTED] This email is for the intended addressee only. If you have received it in error then you must not use, retain, disseminate or otherwise deal with it. Please notify the sender by return email. The views of the author may not necessarily constitute the views of Astrium Limited. Nothing in this email shall bind Astrium Limited in any contract or obligation. Astrium Limited, Registered in England and Wales No. 2449259 Registered Office: Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2AS, England _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu