We need to take backup day by day and required to do it with minimal down time. We are using gtar command for it. Though about flexclone but we dont have license for it. So is there any other way. Can we use snapshot or snapdrive for it.
Actually we have 4 luns for our data filesystem. And for our business purpose we take backup before Close of Business, using gtar in server level which takes 4 hrs, as we are not utilizing any of the storage features.
We are not thinking of taking backup in external location but trying to minimize the down time by using storage features such as snapshot.
As come to know that DS series has flashcopy for this purpose.
We are using power6 server for our banking database and Netapp N6060 for storage. We have to take the backup before doing Close of Business after office hour. We are not using any of the storage features for doing backup and take simple backup using gtar in server level which takes 4 hrs. At this time our system is down and we cannot provide any of the service like ATM and Internet Banking at this time.
We came to know that snapshot may be helpful for us as it takes the flash of data in a point of time. If we can take a snapshot and use this in other server or devices for backup purpose then we donot have to down the system.
We donot have flexclone license. But as I come to know that other storage for eg. DS series has flashcopy for the same purpose.
Now you can map /vol/vol1/lun0_clone to host (it need not be the same host that is using /vol/vol1/lun0 itself), mount it on this host and copy data. You may need to quisce application or otherwise ensure data in snapshot is at least crash-consistent. In the worst case you may need to stop application, unmount LUN, create snapshot and then mount LUN and start application. This gives minimal possible downtime but gurantees absolute consistency of data in clone.
Snap drive should actually transparently fall back to lun clone if flexclone license is not present; so it should also work. It automates all steps needed to create and aces snapshots, so it makes sense to use it if you can.