I kinda had the same issues, only 6 tape drives & 250Gb of diskpool space and a lot of servers to backup. What I did, which works for us, is all the Exchange & SQL jobs go direct to tape, they're the biggest in terms of Gb, the rest are staggered to diskpool. The Big Exch & SQL jobs are allowed 2 mount points, never more than 1 of those jobs running at a time. The Exch & SQL jobs have a higher priority than diskpool migration just in case there's ever contention for tape drives. The diskpool is set to migrate at 70% and allowed 4 mount points, lower limit set to 25% Before the DB get backed up in the morning the diskpool gets flushed to tape.
Our setup is such that data is on disk for as short a time as possible, this suits us as our TSM backups aare predominantly for DR. Recovering data users have "disappeared" is done via Snapshots. -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of John Naylor Sent: 17 August 2005 13:20 To: [email protected] Subject: Re: [ADSM-L] HELP!!!! Migrations taking too long and pools filling up! Joni, Looks like you were unlucky and got hit by some extra large backups, which filled up your disk pool faster than it could be emptied I assume this is what caused a lot of backups to be delayed, by media wair. In truth it does sound as if you need more or faster tape drives. That aside what I do in a tape constrained environment is to run overnight with a diskpool high migration set at 40% and a lo of 20% You may want to experiment with these values. I also run concurrent to that hourly triggered backups of the disk storage pool to a tape copy pool In effect I use 3 drives overnight . It does mean that I am doing tape to tape pool copies during the day but I have more drives available then. This in not perfect but it works for me John Joni Moyer <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[email protected]> 17/08/2005 12:40 Please respond to "ADSM: Dist Stor Manager" <[email protected]> To [email protected] cc Subject HELP!!!! Migrations taking too long and pools filling up! Hello Everyone! Due to our tape drive shortage I have added a tremendous amount of disk to hold the data for 24 hours. It appears as if now it is taking a very long time for the disk pools to migrate to tape and processes are still backing up and causing contention with backups of the client data sometimes of up to 10 hours. How can I resolve this issue so that the clients receive a quick backup and do not have I/O contention? I thought that adding more disk would help because the landing spot for the data is now a larger disk pool that can house all of the data, but it seems like it's hitting it's 70% full mark and when I came in this morning the disk pool was up to 95% full, there are many clients that are waiting to write their backups and everything is locked up. Any suggestions would be appreciated! I don't know what to do for this environment any longer and I am not allowed to buy tape drives. Thank you in advance! ******************************** Joni Moyer Highmark Storage Systems Work:(717)302-6603 Fax:(717)302-5974 [EMAIL PROTECTED] ******************************** </p> ********************************************************************** </p> The information in this e-mail is confidential and may be legally privileged. It may not represent the views of Scottish and Southern Energy Group. </p> It is intended solely for the addressees. Access to this e-mail by anyone else is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. Any unauthorised recipient should advise the sender immediately of the error in transmission. Unless specifically stated otherwise, this email (or any attachments to it) is not an offer capable of acceptance or acceptance of an offer and it does not form part of a binding contractual agreement. </p> Scottish Hydro-Electric, Southern Electric, SWALEC, Atlantic Electric and Gas, S+S and SSE Power Distribution are trading names of the Scottish and Southern Energy Group. </p> ********************************************************************** ---------------------------------------------------------------------- This e-mail, including any attached files, may contain confidential and privileged information for the sole use of the intended recipient. Any review, use, distribution, or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive information for the intended recipient), please contact the sender by reply e-mail and delete all copies of this message.
