Hi,

we have a Linux system serving as a storage. As it is running out of free space be bought a new server which should replace the old one. We would like the outage during the migration to be as short as possible. The plan is as follows (actually very similar to XEN live migration):

1. copy the data to the new storage
2. stop access to the old storage
3. synchronization of data
4. set the new storage as the primary one.

I was thinking of rsync, but the first phase (building file list) takes extremely long, because there are milions of files.

Is there any other tool which whould be more suitable for it?

Thanks for helping

Possibly use this http://clonezilla.org/ and just clone the old system to the new one in 3 steps:

1. stop access to old
2. clone old=>new
3. enable access to new

Thanks for reply. The problem is that the cloning of the whole storage would take about one day (it is more than 2TB of data). So my plan is to copy everything in the first step then stop access to storage and copy only the changed data.

As the data is pretty big (2 TB) it is bound to consume time, you can use rsync follows.

1. copy the data to the new storage
2. synchronization of data
3. stop access to the old storage
4. set the new storage as the primary one