Re: [rdiff-backup-users] rdiff-backup painfully slow using NFS mount

[Billy Crook]

On Wed, Aug 12, 2009 at 14:16, Simon Hobson<address@hidden> wrote:
> Josh Nisly wrote:
>
>> You are correct in your analysis. Using rdiff-backup locally + rsync to
>> the NFS mount would certainly work.
>
> Wouldn't that still leave the same fundamental problem

Yes.  It would.

Magic isn't real. To truly know that a source and destination are
identical, the entire source must be read.  As must the entire
destination.  Period.  If the two are on seperate computers joined by
a network, you can do this two ways:

1) Transfer the contents of one of them entirely, over the network.

2) Run a process on each to reduce blocks of each file to checksums,
and transfer just those checksums.

ISCSI and NFS are not capable of letting the remote machine run
processes on the server.  SSH is.  Rsync will run the comparison on
both machines.