Michael Salmon wrote:
>
> | My understanding is that a NetApp Filer might take a snapshot while a
> | file is in the middle of being written, so although rsync couldn't
> | crash, there is no guarantee that the file is consistent from the
> | application's point of view.
>
> NetApp's take a snapshot when their nvram is full or IIRC 10 seconds have
> passed.
This is not what a snapshot is. What is being described here (nvram
1/2 full) is a trigger for the netapps to write data from nvram to
disk.
Netapps snapshots are usually scheduled to 'fire' at regular intervals
during the day -- 8am,10am,1pm,3pm,5pm as well as some nightly/weekly
configuration you can configure. You can also manually fire a snapshot
at any time you would like to. A snapshot may have inconsistent files
-- unless you have application control and can quiet the processes
down for a minute when the snapshot fires.
eric
