I was reading through DAOS information to work out how best to restore Quickr documents (that live in DAOS enabled places) and stumbled across this gem from an IBM Engineering open mic call. The question was around TSM but the answer was really interesing..

"A: Clustermates are independent with DAOS configured per server. One of the benefits of the 8.5.1 release is to have the servers participate in DAOS. You do not need any special software to do a production backup in these circumstances. Back up the .nsf using the normal TSM and then back up the .nlo DAOS files (treating them as flat files).

On 8.5.1, there are some new features that save bandwidth. For example, if two servers are running DAOS and you want to send an attachment from one to another, DAOS first checks to see if the attachment is already there. If so, there is no need to send it twice. If all servers in a cluster have DAOS and a new message comes in that you've already seen, DAOS does a reference count to check."

Not quite a single DAOS store but great that it intelligently checks to see if it exists already.

Comments (1) Peter Smith November 3rd, 2009 13:42:08