• Quiesce the processing to create a synchronization point for snapshot to occur
•Flush buffers, force any write completions
• Take the Snapshot to form a stable image at the known point-in-time
• Release applications to resume normal processing
• Backup the snapshot
Data Protection with Storage Networks SNIA Tutorial
Quiesce the application ⎯ this just means temporarily suspend. So you will suspend any new I/O from starting. Next we
Flush the application buffers. ⎯ this forces any writes to complete. Because if the write hasn’t completed we will get an inconsistent copy of data. Once the flush has been performed all of the data on our storage area will be correct. Then we can take our
Snapshot or Split the Mirror
⎯ now the application can be released and carry on working because we now have our point in time copy.
The backup will be based on this snapshot
⎯ anything that happens after this point in time is not required for this backup.