snapvault performance

[Raju Mahala]

I face performance issue on snapvault for some specific volumes.
First I explain my configuration. Around 10primary filers are
configured for snapvault on single R200 and used data size is around
45TB. Now almost all volumes are taking place overnight for changed
data but on some volumes it takes more than 24hr. If I compare those
volumes with others then I found that no. of files on these volumes are
more and average file size is also very less. But I feel snapvault
works at block level so these factors should not affect.
So can you suggest where should I hit or how to findout the reason.

Thanks & Regards,
Raju