[Veritas-bu] NDMP Incremental backup
Sure starting to look that way...oh well, thank-you. I'll do some re-aligning and hope for the best. +-- |This was sent by [EMAIL PROTECTED] via Backup Central. |Forward SPAM to [EMAIL PROTECTED] +-- ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] NDMP Incremental backup
Pat, We backup a Celerra (NS80G) with dedicated tape drives and also perform a weekly full and daily incremental. We've not had to concern ourselves with ctime/mtimes of files - just set the policy schedule to an incremental type (we run diffs) and let 'er rip. We do VBB backups of our Celerra rather than the default PAX (tar) backups because we found this to be a better performer with our LTO2 tape drives. VBB is EMC-specific and must be set using a custom 'set type = vbb' line in the policy (it's documented in Celerra NDMP backup manual). Note that VBB requires usage of checkpoint (snapsure) files, whereas a PAX type of backup it is optional. -Original Message- From: PGerard [mailto:[EMAIL PROTECTED] Sent: Tuesday, June 03, 2008 2:49 PM To: VERITAS-BU@mailman.eng.auburn.edu Subject: [Veritas-bu] NDMP Incremental backup Hi everyone. I am backing up an EMC Celerra using NDMP with one tape drive attached to each of the data moversthis is working fairly well...at least way better than the way it was beforebut I do have a question about incrementals. One of the file systems does pretty much a ful everytime the incremental runs. Could that be a CTIME/MTIME thing? Is there a necessity to turn off CTIME? Can someone please let me know? Thanks +-- |This was sent by [EMAIL PROTECTED] via Backup Central. |Forward SPAM to [EMAIL PROTECTED] +-- ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
[Veritas-bu] NDMP Incremental backup
Hi everyone. I am backing up an EMC Celerra using NDMP with one tape drive attached to each of the data moversthis is working fairly well...at least way better than the way it was beforebut I do have a question about incrementals. One of the file systems does pretty much a ful everytime the incremental runs. Could that be a CTIME/MTIME thing? Is there a necessity to turn off CTIME? Can someone please let me know? Thanks +-- |This was sent by [EMAIL PROTECTED] via Backup Central. |Forward SPAM to [EMAIL PROTECTED] +-- ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
[Veritas-bu] NDMP Incremental backup
PGerard Wrote: but I do have a question about incrementals. One of the file systems does pretty much a ful everytime the incremental runs. Could that be a CTIME/MTIME thing? Is there a necessity to turn off CTIME? Can someone please let me know? The way incremental backups are handled in NDMP is via a setting called Dump Level this can be a number between 0 and 9, 0 is the full backup of the system and each level after that (1-9) backs up all the changes the filer tracks since the last dump level. What you want to check is that the policy you have this filer in has a weekly (or at least once every 10 days) full backup and the other backups either cumulative or differential incremental backups. If you do a cumulative incremental backup the dump level for all incremental backups will be 1 (meaning all the changes since the last full). This will use more tape but will assure a faster recovery. If you have a differential incremental you will see dump level from 1 to 9 or in most cases from 1 to 4 (Monday through Thursday). What you will want to do is look in the NDMP log for an incremental backup to see what the Dump Level is set to. You do not happen to have any scripts that are cleaning up the streams files from in the NetBackup\db\images directory do you? Mike Heck ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
[Veritas-bu] NDMP Incremental backup
No...all of the other policies for the other file systems are built the exact same way and they are fine. This particular one has outlook PST files in it, which are likely quite large, and I doubt they are ALL changing, so I suspect the time stamp gets modified when the users open it up with outlook...i guess it's possible they have some automatic archiving too and the minute even a single new email message makes it into the PST it is deemed as having changed and will get picked up by an incremental. We are running differentials all the time with only Monthly backupswe have 30TB of Celerra and only 6 tape drives to back it all up, so doing it every week would be extremely tedious. I thought maybe the ctime thing was causing this but the more I think about it, the more I think the files are just being modified on a daily basis. Thanks +-- |This was sent by [EMAIL PROTECTED] via Backup Central. |Forward SPAM to [EMAIL PROTECTED] +-- ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] NDMP Incremental backup
I sure know that my pst file is updated a lot every day. I'm sure that is the cause of your issue. -tim On Jun 3, 2008, at 5:35 PM, PGerard netbackup- [EMAIL PROTECTED] wrote: No...all of the other policies for the other file systems are built the exact same way and they are fine. This particular one has outlook PST files in it, which are likely quite large, and I doubt they are ALL changing, so I suspect the time stamp gets modified when the users open it up with outlook...i guess it's possible they have some automatic archiving too and the minute even a single new email message makes it into the PST it is deemed as having changed and will get picked up by an incremental. We are running differentials all the time with only Monthly backupswe have 30TB of Celerra and only 6 tape drives to back it all up, so doing it every week would be extremely tedious. I thought maybe the ctime thing was causing this but the more I think about it, the more I think the files are just being modified on a daily basis. Thanks +-- |This was sent by [EMAIL PROTECTED] via Backup Central. |Forward SPAM to [EMAIL PROTECTED] +-- ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
