Re: [Veritas-bu] Disk volume layout question
On Fri, Dec 16, 2005 at 12:52:05PM -0500, Johnson, Eric K wrote: > We are in the early stages of migrating from Legato NetWorker to Veritas > NetBackup 5.1. As part of our migration, we are adding enough disk space > to hold one week worth of backups before they are staged to tape. > > When configuring our disk (approximately 9.6TB before RAID in a Sun > StorEdge 3511 SATA array. NetBackup server is a Sun E450 running Solaris > 10) are there any recommendations for how it should be separated out > into volumes? > > Is it better to have one large volume? Many small volumes? What are the > advantages and disadvantages to the given volume sizes from a NetBackup > perspective? With 5.1, a job will fail if the DSSU fills up. There are no mechanisms to throw a bunch of volumes at it and let NetBackup chose. With 6.0, this problem is supposed to go away. For now, I'd think that you would want to create a single large array. All of this assumes that all backups are created equally. If there is some stuff that you need to guarantee stays on disk for a week, you may need to set up individual DSSUs for that stuff (we're doing this for some Oracle databases). .../Ed -- Ed Wilts, Mounds View, MN, USA mailto:[EMAIL PROTECTED] ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
RE: [Veritas-bu] Disk volume layout question
Veritas says to create a different filesystem for Full and Incrementals, due to the backup sizes generally involved and how many files have to get deleted for each when cleaning a DSSU. Future versions of NetBackup sound like they'll do a much better job of handling staging disks. Some light reading for you: http://seer.support.veritas.com/docs/270101.htm http://seer.support.veritas.com/docs/270079.htm http://seer.support.veritas.com/docs/268777.htm http://seer.support.veritas.com/docs/265305.htm http://seer.support.veritas.com/docs/278169.htm http://seer.support.veritas.com/docs/273532.htm Depending on what you're using for back-end storage, EMC also has a pair of whitepapers/briefs you can get on running backups to disk. They should be available from their webpage somewhere. "Effective Write Bandwidth with CLARiiON ATA Disk Drives and RAID 3: Backup-to=Disk and Streaming Media" "EMC Backup Storage Solutions: Backup-to-Disk Guide with VERITAS NetBackup" Have fun. =) - John Nardello "Your backups are only as good as your restores." -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ed Wilts Sent: Friday, December 16, 2005 10:51 AM To: Johnson, Eric K Cc: veritas-bu@mailman.eng.auburn.edu Subject: Re: [Veritas-bu] Disk volume layout question On Fri, Dec 16, 2005 at 12:52:05PM -0500, Johnson, Eric K wrote: > We are in the early stages of migrating from Legato NetWorker to Veritas > NetBackup 5.1. As part of our migration, we are adding enough disk space > to hold one week worth of backups before they are staged to tape. > > When configuring our disk (approximately 9.6TB before RAID in a Sun > StorEdge 3511 SATA array. NetBackup server is a Sun E450 running Solaris > 10) are there any recommendations for how it should be separated out > into volumes? > > Is it better to have one large volume? Many small volumes? What are the > advantages and disadvantages to the given volume sizes from a NetBackup > perspective? With 5.1, a job will fail if the DSSU fills up. There are no mechanisms to throw a bunch of volumes at it and let NetBackup chose. With 6.0, this problem is supposed to go away. For now, I'd think that you would want to create a single large array. All of this assumes that all backups are created equally. If there is some stuff that you need to guarantee stays on disk for a week, you may need to set up individual DSSUs for that stuff (we're doing this for some Oracle databases). .../Ed -- Ed Wilts, Mounds View, MN, USA mailto:[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
RE: [Veritas-bu] Disk volume layout question
In NB 5.0, i have noticed that one DSSU(a) can't delete the contents of another DSSU(b) if it needs more space. example: /export/dsu is a single partition /export/dsu/daily all information has been duplicated to tape /export/dsu/monthend needs more space, but can't/won't ask /export/dsu/daily to delete some information. Currently, your better splitting off a slice for each DSSU. Which leads to wasted space. Maybe that has changed under 6.0. Karl [EMAIL PROTECTED] wrote on 12/16/2005 01:20:42 PM: > Veritas says to create a different filesystem for Full and Incrementals, > due to the backup sizes generally involved and how many files have to > get deleted for each when cleaning a DSSU. Future versions of NetBackup > sound like they'll do a much better job of handling staging disks. > > Some light reading for you: > http://seer.support.veritas.com/docs/270101.htm > http://seer.support.veritas.com/docs/270079.htm > http://seer.support.veritas.com/docs/268777.htm > http://seer.support.veritas.com/docs/265305.htm > http://seer.support.veritas.com/docs/278169.htm > http://seer.support.veritas.com/docs/273532.htm > > Depending on what you're using for back-end storage, EMC also has a pair > of whitepapers/briefs you can get on running backups to disk. They > should be available from their webpage somewhere. > "Effective Write Bandwidth with CLARiiON ATA Disk Drives and RAID 3: > Backup-to=Disk and Streaming Media" > "EMC Backup Storage Solutions: Backup-to-Disk Guide with VERITAS > NetBackup" > > Have fun. =) > - John Nardello > "Your backups are only as good as your restores." > > > > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Ed Wilts > Sent: Friday, December 16, 2005 10:51 AM > To: Johnson, Eric K > Cc: veritas-bu@mailman.eng.auburn.edu > Subject: Re: [Veritas-bu] Disk volume layout question > > > On Fri, Dec 16, 2005 at 12:52:05PM -0500, Johnson, Eric K wrote: > > We are in the early stages of migrating from Legato NetWorker to > Veritas > > NetBackup 5.1. As part of our migration, we are adding enough disk > space > > to hold one week worth of backups before they are staged to tape. > > > > When configuring our disk (approximately 9.6TB before RAID in a Sun > > StorEdge 3511 SATA array. NetBackup server is a Sun E450 running > Solaris > > 10) are there any recommendations for how it should be separated out > > into volumes? > > > > Is it better to have one large volume? Many small volumes? What are > the > > advantages and disadvantages to the given volume sizes from a > NetBackup > > perspective? > > With 5.1, a job will fail if the DSSU fills up. There are no mechanisms > to throw a bunch of volumes at it and let NetBackup chose. With 6.0, > this problem is supposed to go away. > > For now, I'd think that you would want to create a single large array. > > All of this assumes that all backups are created equally. If there is > some stuff that you need to guarantee stays on disk for a week, you may > need to set up individual DSSUs for that stuff (we're doing this for > some Oracle databases). > > .../Ed > > -- > Ed Wilts, Mounds View, MN, USA > mailto:[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 > > >
Re: [Veritas-bu] Disk volume layout question
On Fri, Dec 16, 2005 at 02:23:10PM -0600, [EMAIL PROTECTED] wrote: > In NB 5.0, i have noticed that one DSSU(a) can't delete the contents of > another DSSU(b) if it needs more space. > > Maybe that has changed under 6.0. You can have a group of DSSUs in 6.0. If dssu1 fills during a backup run, NBU can automatically start using dssu2. We're not at 6.0 yet here, but that's what I've heard. .../Ed -- Ed Wilts, Mounds View, MN, USA mailto:[EMAIL PROTECTED] ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu