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2 Intern
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261 Posts
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1443
January 5th, 2011 10:00
creating checkpoints for the NDMP backup
Hello everyone!
I 'm working little toward service improvement for the customer . Right now, I 'm in the process of configuring NDMP backup to netbackup for the celerra 704G .
This celerra has existing shares( Cifs / iscsi ).In order to bring it to the backup rotation , i 'm thinking of getting this backed up from integrated checkpoint to tape.
For this i need to create checkpoints for all the existing file systems. Is there there any alternative just in case?
Also,creating a point in time copy for these should not exponentially increase the SaVvol space.
This is the pool info i 've:
nas_pool -size -all
id = 3
name = clar_r5_performance
used_mb = 3997280
avail_mb = 4797240
total_mb = 8794520
potential_mb = 0
id = 10
name = clarata_archive
used_mb = 0
avail_mb = 0
total_mb = 0
potential_mb = 0
id = 41
name = astellas2tb
used_mb = 2047999
avail_mb = 0
total_mb = 2047999
potential_mb = 0
***ID 41 is using iscsi , which doesn't 've space.
I know SaVvol use space from the pool (e.g, clar_r5_performance=~4TB). so, in case my file system which is of 1 TB and doesn't have much space whill not interfere with cretion of snasure.please correct me if i 'm wrong.
My question is , can i bring those Iscsi users to backup rotation where the saVvol in this case will be from my performance pool?
It has a 2TB lUn and free space available is approx 5GB.
Also, backing up will be done through LAN , will it be helpful to use checkpoints for these purpose.
Any expert guidance here will be very much appreciated.
Thanks for reading!
dynamox
9 Legend
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20.4K Posts
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January 5th, 2011 13:00
as you know checkpoints are great for single file/directory level restores, customers can do restores themselves which is great. You can setup snapsure schedule in Celerra Manager that will create checkpoints at the time you specify, you also get to specify how long the snapshot is kept until it gets refreshed. For example we have multiple CIFS file systems that we sell to different departments. Our standard is to setup 14-days snapshot schedule, this will allow customers to recover deleted or currupted files or simply obtain an earlier version of the file. They will be able to go 14 days back to do that ..that's our standard but really Celerra allows you to have up to 96 checkpoints per file system. We have the same standard for file systems that are exported via NFS.
So all this is nice and dandy but what happens if Celerra catches on fire and melts down, your primary data is gone so are your snapshots. That's where NDMP comes in, you can send backup over FC network or over IP network (3-way NDMP) to your tape device (hopefully at either another location or to a tape class that gets send offsite). Once you get Netbackup going and setup NDMP jobs, Netbackup will instruct Celerra to create a temporary snapshot, send it to tape and then tell Celerra to get rid of it.
You are correct that checkpoints will use SavVol space, how much ? It depends what's going on with your file system, what users are doing, how long you keep checkpoints. You can restrict the size of SavVol ..how big it can grow.
Unfortunatelly you can not use NDMP to backup iSCSI LUNs, you will need to use Netbackup agent on the host where iSCSI LUN is presented.
sorry if i mentioned things you already knew.
deeppat
2 Intern
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261 Posts
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January 5th, 2011 12:00
Thanks but this doesn't answer my question...
deeppat
2 Intern
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261 Posts
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January 6th, 2011 12:00
Thanks dynamox,
The explanation was very helpful.