Strange Replication Behavior in 2-node Cluster?

2010-06-01 Thread Alan McConnell
Saw what I think is strange replication/failover behavior while testing out a cluster with two nodes. My cluster is running defaults and maps simple keys to byte payloads. I saw this sequence of events: 1) Query for key "X". Receive the correct value "Y" as expected. 2) Shut down node #1. Que

Re: Replication behavior

2010-05-13 Thread Jimmy Thrasher
Ah, yes. So with 1 node, I had a guaranteed 3 copies of the data, and when I added another node, some of those got reduced to 1 or 2 on that node. I understand now, thanks. Jimmy On Thu, May 13, 2010 at 11:34 AM, Justin Sheehy wrote: > Hi, Jimmy. > > With an n_val of 3, there will be 3 copies

Re: Replication behavior

2010-05-13 Thread Justin Sheehy
Hi, Jimmy. With an n_val of 3, there will be 3 copies of each data item in the cluster even when there are less than 3 hosts. With 2 nodes in that situation, each node will have either 1 or 2 copies of each item. Does that help with your understanding? -Justin _

Replication behavior

2010-05-13 Thread Jimmy Thrasher
Hi all, I just added another node to my cluster (moving from 1 to 2) and was surprised by some behavior. As I understand replication, with an n_val of 3 (default), all nodes will have all data until I add my 4th node. First, is this right? Second, I watched my disk usage on node 1 go from 1GB t