Incremental backups, backup only data that has changed. Incremental backups are done in sets. You need to start by doing a full backup, and then x incrementals. I forget what the limit is but at a certain point you must do another full and start a new set. When you do the restore, you start with the full backup from that set and then how ever many incrementals you have. The incrementals take less time to backup, but it takes longer to restore. We do full backups daily. Our IS is only 28gb. If you use Tivoli TDP for Exchange you would not loose your single instance storage if you do full's or incrementals. The only time you loose single instance storage is if you use a brick level backup program or a Microsoft utility like exmerge to extract the individual mailbox information to personal folders. You did not mention what version of the TDP you are using. If you are using v1.1, then you should set versions data deleted and retain only version to 0. Version data exist and Retain extra version doesn't matter. If you are using v1.1, TSM expiration does not work on your IS backups. There is a command line utility you must run called adsmautodelete I think. You specify on the command line how many days to keep your backups. If you are using TDP v2.x I would set your versions data exists to no limit an the retain extra versions to how many days you want to keep your full backups for. The incremental backups use unique names so they are governed by versions data deleted and retain only version. I would set them to be longer than the settings for the full backup, versions data exist and retain extra. Finally you should read the help file or refer to the manual. There is a good section in it about policy recommendations that will explain it better than I have here.
Thanks, Mark -----Original Message----- From: Mark Bertrand [mailto:[EMAIL PROTECTED]] Sent: Monday, March 04, 2002 8:51 AM To: [EMAIL PROTECTED] Subject: TDP for Exchange I have been reading the threads on the TDP for Exchange and I have a different question. Since Mark Remeta has stated a very good point, my question references the same issue, "single instance storage". -----Original Message----- From: Remeta, Mark [mailto:[EMAIL PROTECTED]] Sent: Friday, March 01, 2002 8:04 AM To: [EMAIL PROTECTED] Subject: Re: Exchange TDP 2.2 Restore Question Tony, if your exmerging your IS to pst files that 6.5gb db could balloon due to the fact you will be loosing single instance storage... fyi. Mark How does an incremental backup for TDP for Exchange work? Since Tivoli does not backup individual mailboxes as files but instead does a Directory and Information Store backup, would a single message sent or received constitute an Information store change, therefore resulting in a complete backup instead of the selected Incremental backup? Or, is the TDP designed to recognize only the changes and only backup those parts of the Information Store that have changed with the possibility of a restore only if you have at least one good Full backup? I am only asking because we currently have 3 Exchange 5.5 servers with 40GB average databases doing nightly full backups. Will going to a 6 day Incremental 1 Full be beneficial with our current retention settings (as follows)? Versions Data Exist 30 Versions Data Deleted 0 Retain Extra Versions 30 Retain Only Versions 30 Also, do these retention settings seem OK. I was not involved with Tivoli when they were set and would value another opinion. Thanks to all, Mark Bertrand Confidentiality Note: The information transmitted is intended only for the person or entity to whom or which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of this information by persons or entities other than the intended recipient is prohibited. If you receive this in error, please delete this material immediately.
