Re: Seeds, autobootstrap nodes, and replication factor

2010-06-04 Thread Benjamin Black
On Fri, Jun 4, 2010 at 6:51 PM, wrote: > I never said it would be frequent. That was an assumption made by Ben. > You indicated in an earlier email that you expected half the nodes to be offline at any time. It is unclear how you expected that to work for either the consistency processes or the

Re: Seeds, autobootstrap nodes, and replication factor

2010-06-04 Thread pstanhope
al Message- From: Jonathan Shook Date: Fri, 4 Jun 2010 20:28:33 To: Subject: Re: Seeds, autobootstrap nodes, and replication factor If I may ask, why the need for frequent topology changes? On Fri, Jun 4, 2010 at 1:21 PM, Benjamin Black wrote: > On Fri, Jun 4, 2010 at 11:14 AM, Philip St

Re: Seeds, autobootstrap nodes, and replication factor

2010-06-04 Thread Jonathan Shook
If I may ask, why the need for frequent topology changes? On Fri, Jun 4, 2010 at 1:21 PM, Benjamin Black wrote: > On Fri, Jun 4, 2010 at 11:14 AM, Philip Stanhope wrote: >> I guess I'm thick ... >> >> What would be the right choice? Our data demands have already been proven to >> scale beyond

Re: Seeds, autobootstrap nodes, and replication factor

2010-06-04 Thread Benjamin Black
On Fri, Jun 4, 2010 at 11:14 AM, Philip Stanhope wrote: > I guess I'm thick ... > > What would be the right choice? Our data demands have already been proven to > scale beyond what RDB can handle for our purposes. We are quite pleased with > Cassandra read/write/scale out. Just trying to underst

Re: Seeds, autobootstrap nodes, and replication factor

2010-06-04 Thread Philip Stanhope
I guess I'm thick ... What would be the right choice? Our data demands have already been proven to scale beyond what RDB can handle for our purposes. We are quite pleased with Cassandra read/write/scale out. Just trying to understand the operational considerations. On Jun 4, 2010, at 2:11 PM,

Re: Seeds, autobootstrap nodes, and replication factor

2010-06-04 Thread Benjamin Black
On Fri, Jun 4, 2010 at 11:04 AM, Philip Stanhope wrote: > > I am contemplating a situation where there may be 2N servers ... but only N > online at any one time. But, for operational purposes, N+n (where n is 1 or > 2), N may be occasionally greater than R. > Then Cassandra is probably not the

Re: Seeds, autobootstrap nodes, and replication factor

2010-06-04 Thread Philip Stanhope
Thanks on the correction about Keyspace versus ColumnFamily ... I knew that just mis-typed. I guess it should be stated (to be obvious) ... that when you are auto bootstrapping a node ... the seed better be alive. The scenario I'm dealing with is that it might not be (reasons for that are tange

Re: Seeds, autobootstrap nodes, and replication factor

2010-06-04 Thread Benjamin Black
On Fri, Jun 4, 2010 at 10:36 AM, Philip Stanhope wrote: > > Here's the scenario: would like R = N where N is the number of nodes. Let's > say 8. > > 1. Create first node, modify storage-conf.xml and change the to be > the ip of the node. Change replication factor to 8 for CF of interest. Start

Seeds, autobootstrap nodes, and replication factor

2010-06-04 Thread Philip Stanhope
Here's the scenario: would like R = N where N is the number of nodes. Let's say 8. 1. Create first node, modify storage-conf.xml and change the to be the ip of the node. Change replication factor to 8 for CF of interest. Start the puppy up. 2. Create 2nd node, modify storage-confg.xml and ch