Re: Expanding Cassandra on EC2 with consistency

2012-07-03 Thread Dan Foody
Hi Alex, Can you share what replication factor you're running? And, are you using ephemeral disks or EBS volumes? Thanks! - Dan On Jul 3, 2012, at 5:52 PM, Alex Major wrote: > Hi Mike, > > We've run a small (4 node) cluster in the EU region since September last > year. We run across all 3

Re: Expanding Cassandra on EC2 with consistency

2012-07-03 Thread Alex Major
Hi Mike, We've run a small (4 node) cluster in the EU region since September last year. We run across all 3 availability zones in the EU region, with 2 nodes in one AZ and then a further node in each AZ. The latency difference between running inside of and between AZ's has been minimal in our expe

Re: Expanding Cassandra on EC2 with consistency

2012-07-03 Thread Michael Theroux
Yes, I saw LOCAL_QUORUM. The definition I saw was: Ensure that the write has been written to / 2 + 1 nodes, within the local datacenter (requiresNetworkTopologyStrategy) This will allow a quorum within a datacenter. However, I think this means that if availability zones are racks, that the

Re: Node crashing during read repair

2012-07-03 Thread Robin Verlangen
Hi Aaron, This was the first error. It occurred a couple of times after this. We did an hardware upgrade on the server and increased the max heap size. Now running fine. Seems that 1.1.1 uses a little more memory, or or data set just grew ;-) Thank you for your time! 2012/7/3 aaron morton > Is

Re: Expanding Cassandra on EC2 with consistency

2012-07-03 Thread Robin Verlangen
Hi Mike, I'm not sure about all your questions, however you should take a look at LOCAL_QUORUM for your question about consistency level reads/writes. 2012/7/3 Michael Theroux > Hello, > > We are currently running a web application utilizing Cassandra on EC2. > Given the recent outages experie

Expanding Cassandra on EC2 with consistency

2012-07-03 Thread Michael Theroux
Hello, We are currently running a web application utilizing Cassandra on EC2. Given the recent outages experienced with Amazon, we want to consider expanding Cassandra across availability zones sooner rather than later. We are trying to determine the optimal way to deploy Cassandra in this de

Re: Thrift version and OOM errors

2012-07-03 Thread Vasileios Vlachos
Just an update to correct something... The application hits 10.128.16.111. The last lines of Error #4 suggest that 10.128.16.110 and 10.128.16.112 where down because Cassandra service was down on 10.128.16.111 and it could not detect the cluster (I think it must be gossip related, right???). Than

Running Cassandra with IPv6

2012-07-03 Thread Fredrik
Anyone know if there are any specific outstanding issues running Cassandra on a ipv6 network (defining cassandra.yaml with ipv6 addresses, communication in cluster between nodes defined with ipv4 and nodes defined with ipv6 addresses, etc.)? The only thing I'm aware about so far is using ipv6 ad