Cassandra migration

Question

I have Cassandra 0.8.0 running with data on server 1, and a clean install of Cassandra 1.0.3 on server 2.

Is it possible to just copy some files from server 1 to server 2? Or do i have to write my own import/export code?

Both servers can be taken down, restarted, etc.

Answer 1

Why would you not upgrade server1? Upgrade details here (either way read this first): http://svn.apache.org/viewvc/cassandra/branches/cassandra-1.0/NEWS.txt?view=markup

But if you do want to change machines, follow the procedures for 'nodetool snapshot' as detailed here: http://wiki.apache.org/cassandra/Operations#Backing_up_data

Re-create the schema on the new node, then add the snapshots to the data directory (as described above), restart cassandra then issue a nodetool scrub.

Answer 2

Thanks zznate it had to do with hardware.

Here some links i found useful:

http://jonathanhui.com/cassandra-data-maintenance-backup-and-system-recovery http://wiki.apache.org/cassandra/StorageConfiguration http://www.memonic.com/user/pneff/folder/database/id/1bZvk

If it looks like nothing happened after migrating make sure you create the column family's on the new node using CassandraCli.