Hi friends,
This blog is created for Sharing all about our IT experience and discuss about new and existing Technology.
IF you anyone want to join this forum,you can join and feel free to ask me any question or suggestion or Post your question or idea.
Tuesday, September 1, 2009
What is the Snapshot and How it works Snapshot in Netapp
Snapshot is point in time image of the file system, which is taken instantly with no impact on system performance
Snapshot contains only pointers and blocks.Suppose you have changed something it will create new snapshot and it will point to new changed block and existing unchanged block.
Snapshots can be browsed in a directory structure that looks just like the original
NetApp reserves 20% of the available capacity of each volume for Snapshots
Example of NetApp Snapshot Technology in Action The following figures assume that the file system is writing a file
that consists of the blocks A, B, C, and D. The live file system writes the blocks A, B, C, and D to disk and locates them with pointers.
You can store up to 255 snapshots at one time on each volume.
snapshot files carry the same permission and inode numbers of the original files.
What you can do with snapshots:
Recover older versions or sets of files that were accidentally changed or deleted ◆ Restore their own files without needing a system administrator to restore files from tape
How to create Snapshot Manually in Netapp:
snap create volume_name snapshot_name
Creating snapshot schedule:
We can create snapshot Monthly,weekly,daily,nightly,hourly
Snapshot is point in time image of the file system, which is taken instantly with no impact on system performance
ReplyDeleteSnapshot contains only pointers and blocks.Suppose you have changed something it will create new snapshot and it will point to new changed block and existing unchanged block.
Snapshots can be browsed in a directory structure that looks just like the original
NetApp reserves 20% of the available capacity of each volume for Snapshots
Example of NetApp Snapshot Technology in Action
The following figures assume that the file system is writing a file
that consists of the blocks A, B, C, and D.
The live file system writes the blocks A, B, C, and D to
disk and locates them with pointers.
You can store up to 255 snapshots at one time on each volume.
ReplyDeletesnapshot files carry the same permission and inode numbers of the original files.
What you can do with snapshots:
Recover older versions or sets of files that were accidentally changed or
deleted
◆ Restore their own files without needing a system administrator to restore
files from tape
How to create Snapshot Manually in Netapp:
snap create volume_name snapshot_name
Creating snapshot schedule:
We can create snapshot Monthly,weekly,daily,nightly,hourly
snap sched volume_name weekly nightly hourly@n,n,....
systemA>snap sched vol1 2 6 8@8,12,16,20
Vol1 -> Volume name
2 -> create snapshot every week and keep maximum two
6 -> create snapshot every night and keep maximum six.
Create snapshot ever hour mentioned as time list