Re: RackAwareStrategy vs RackUnAwareStrategy on AWS EC2 cloud

2010-07-09 Thread Joe Stump
On Jul 9, 2010, at 1:16 PM, maneela a wrote: > Is there any way to mark cassandra node to keep it as just for replication > purpose and not to be as Primary for any data range in the ring? I believe there is. This is what we're doing, but we do all of our writes via a queue. Derek or Mike fro

Re: RackAwareStrategy vs RackUnAwareStrategy on AWS EC2 cloud

2010-07-09 Thread maneela a
ConsistencyLevel.ONE is default option given inside stress.py so I am using default one --- On Fri, 7/9/10, Bill de hÓra wrote: From: Bill de hÓra Subject: Re: RackAwareStrategy vs RackUnAwareStrategy on AWS EC2 cloud To: user@cassandra.apache.org Date: Friday, July 9, 2010, 2:12 PM   east

Re: RackAwareStrategy vs RackUnAwareStrategy on AWS EC2 cloud

2010-07-09 Thread maneela a
e and not to be as Primary for any data range in the ring?  Niru --- On Fri, 7/9/10, Joe Stump wrote: From: Joe Stump Subject: Re: RackAwareStrategy vs RackUnAwareStrategy on AWS EC2 cloud To: user@cassandra.apache.org Date: Friday, July 9, 2010, 1:41 PM We had similar issues when we started ru

Re: RackAwareStrategy vs RackUnAwareStrategy on AWS EC2 cloud

2010-07-09 Thread Bill de hÓra
east: A B C west: D Perhaps you are blocking on a write to D - what's your quorum/rf set up as? Bill On Fri, 2010-07-09 at 10:36 -0700, maneela a wrote: > Are there any known performance issues if cassandra cluster > launched with RackAwareStrategy because I see huge perfo

Re: RackAwareStrategy vs RackUnAwareStrategy on AWS EC2 cloud

2010-07-09 Thread Joe Stump
We had similar issues when we started running Cassandra on EC2 between multiple AZ's (not regions; we're working up to that shortly). We ended up building a rack aware strategy specific to AWS, which is posted somewhere in JIRA. Basically it uses the AWS API to ensure that replicants are stored

Re: RackAwareStrategy vs RackUnAwareStrategy on AWS EC2 cloud

2010-07-09 Thread Dave Viner
Hi, Can you post the stress test code and storage.conf used? I have a cluster in EC2 using RackAware. However, I am in 1 region (us-east-1) but 2 Availability Zones. Amazon helps to ensure that AZ's are isolated from each other creating a fail-resistant cluster. But, staying in the same region

RackAwareStrategy vs RackUnAwareStrategy on AWS EC2 cloud

2010-07-09 Thread maneela a
Are there any known performance issues if cassandra cluster launched with RackAwareStrategy because I see huge performance difference between RackAwareStrategy vs RackUnAwareStrategy.  Here are details: we have a cluster setup with 4 EC2 X large nodes, 3 of them are running in East region an