On 5/13/11 10:08 AM, Maki Watanabe wrote:
I wrote a small JMX client to invoke getNaturalEndpoints.
It works fine at my test environment, but throws NPE for keyspace we
will use for our application (both 0.7.5).
Does anyone know quick resolution of that before I setting up
cassandra on eclipse
On 5/11/11 5:27 AM, Oliver Dungey wrote:
I am currently working on a system with Cassandra that is written
purely in Java. I know our end solution will require other languages
to access the data in Cassandra (Python, C++ etc.). What is the best
way to store data to ensure I can do this? Should
On 5/9/11 9:49 PM, Jonathan Ellis wrote:
On Mon, May 9, 2011 at 5:58 PM, Alex Araujocassandra- How many
replicas are you writing?
Replication factor is 3.
So you're actually spot on the predicted numbers: you're pushing
20k*3=60k raw rows/s across your 4 machines.
You might get another 10%
Hey Adrian -
Why did you choose four big instances rather than more smaller ones?
Mostly to see the impact of additional CPUs on a write only load. The
portion of the application we're migrating from MySQL is very write
intensive. The other 8 core option was c1.xl with 7GB of RAM. I will
On 5/6/11 9:47 PM, Jonathan Ellis wrote:
On Fri, May 6, 2011 at 5:13 PM, Alex Araujo
cassandra-us...@alex.otherinbox.com wrote:
I raised the default MAX_HEAP setting from the AMI to 12GB (~80% of
available memory).
This is going to make GC pauses larger for no good reason.
Good point - only
months ago I was seeing 12k writes/s on a single EC2 XL. So
something is wrong.
My first suspicion is that your client node may be the bottleneck.
On Wed, Apr 20, 2011 at 2:56 PM, Alex Araujo
cassandra-us...@alex.otherinbox.com
mailto:cassandra-us...@alex.otherinbox.com wrote
Does anyone have any Ec2 benchmarks/experiences they can share? I am
trying to get a sense for what to expect from a production cluster on
Ec2 so that I can compare my application's performance against a sane
baseline. What I have done so far is:
1. Lunched a 4 node cluster of m1.xlarge
Hi, I was wondering if there are any patterns/best practices for
creating atomic units of work when dealing with several column families
and their inverted indices.
For example, if I have Users and Groups column families and did
something like:
Users.insert( user_id, columns )
, Alex Araujo wrote:
Hi, I was wondering if there are any patterns/best practices for creating
atomic units of work when dealing with several column families and their
inverted indices.
For example, if I have Users and Groups column families and did something like:
Users.insert( user_id, columns
