>> On Fri, 21 Apr 2006 12:47:12 -0700, "Gill, Geoffrey L." <[EMAIL PROTECTED]> >> said:
> I'm a little confused as to how data is migrated to tape with > collocation groups configured. Let's say I have 2 collocation groups > in a single domain each with 10 computers, and I have configured the > disk pool to migrate using 8 processes, how many processes should I > see migrating data? You'd see 2; one for each group. > What I seem to see is just 2 processes so I'm wondering what is the > best way to configure the system to migrate quickly yet keep groups > of computers together. I don't want to collocate each node on it's > own tape but I do want to take advantage of migrating data with as > many drives as possible. You're going to have to find where your sweet spot is between utilization and collocation. But consider: Say your nodes are A0-A9 and B0-B9 (2 groups, 10 nodes each) If you want the 10 A nodes to use multiple drives, you are also saying, in a way, that you don't want them collocated (on the minimum number of tapes). Perhaps what this means is that you want 4 groups, or 5. I'm working on a considered theory of collocation group membership, but the best I've got so far is trying to make the groups' total occupancy tend towards about 2 volumes' size. - Allen S. Rout
