Re: Maintenance releases

2011-02-11 Thread Johan Oskarsson
+1. Cassandra has matured a lot lately and more users are relying heavily on it in production. For those users, including us, stability and predictability becomes very important. Not including new and potentially unstable features in maintenance releases is an easy way to decrease risk at a lo

Re: Distributed counters are in trunk

2010-12-22 Thread Johan Oskarsson
Thanks Jonathan! We'll work on adding some more docs to that wiki (probably after the holidays). /Johan On 21 dec 2010, at 18.12, Jonathan Ellis wrote: > Thanks to Kelvin, Johan, Ryan, Sylvain, Chris, and everyone else for their > hard work on this! > > For mere mortals: http://wiki.apache.org

Re: An open letter to Kelvin and Johan

2010-10-04 Thread Johan Oskarsson
Jonathan, Thanks for the email, much appreciated. I’ll be the first to admit that Kelvin and I have made our share of mistakes along the way. In particular, we could have worked harder to clearly explain and document our approach to counters. In order to move this forward we are going to have a

Re: [DISCUSSION] High-volume counters in Cassandra

2010-09-24 Thread Johan Oskarsson
t; On Mon, Sep 6, 2010 at 12:11 PM, Johan Oskarsson wrote: >> The consensus in this thread seems to be moving towards the following todos >> in order to get 1072 into trunk. >> >> * create separate api methods for increments >> * mark functionality as experimental &g

Re: [DISCUSSION] High-volume counters in Cassandra

2010-09-06 Thread Johan Oskarsson
The consensus in this thread seems to be moving towards the following todos in order to get 1072 into trunk. * create separate api methods for increments * mark functionality as experimental * further code cleanup (please comment on jira with specific suggestions) Is this a reasonable summary? W

[DISCUSSION] High-volume counters in Cassandra

2010-09-02 Thread Johan Oskarsson
In the last few months Digg and Twitter have been using a counter patch that lets Cassandra act as a high-volume realtime counting system. Atomic counters enable new applications that were previously difficult to implement at scale, including realtime analytics and large-scale systems monitoring

Towards Automatically Checking Thousands of Failures with Micro-specifications

2010-06-19 Thread Johan Oskarsson
Hi all, There's an interesting paper published where the authors describe a project for failure testing in distributed systems. As an example the show how they could find issues in Hadoop HDFS. They also mention they are working on similar tests for Cassandra. Worth a read. Hopefully they will

Re: Performance regression tests

2010-05-13 Thread Johan Oskarsson
to plot web page response > times, and it served its purpose great. > > -Todd > > On Wed, May 12, 2010 at 1:13 AM, Johan Oskarsson wrote: >> I've started looking into how this issue. My current thinking are as follows. >> >> Add support for Cassandra in Whirr:

Re: Performance regression tests

2010-05-12 Thread Johan Oskarsson
I've started looking into how this issue. My current thinking are as follows. Add support for Cassandra in Whirr: http://wiki.apache.org/incubator/WhirrProposal This would allow us to start a short lived Cassandra cluster on one of the cloud services (EC2/Rackspace etc) for testing. Real hardwar

Re: [VOTE] Release 0.6.0 (final)

2010-04-12 Thread Johan Oskarsson
+0. My only concern is the https://issues.apache.org/jira/browse/CASSANDRA-866 issue. I understand it's important to get this release out though, so won't block. /Johan On 12 apr 2010, at 03.55, Eric Evans wrote: > > It's been about a week and half since rc1 and there aren't any serious > iss

Re: Binary release artifacts (or What a User Wants)

2010-03-18 Thread Johan Oskarsson
Paul Querna wrote: On Wed, Mar 17, 2010 at 4:21 PM, Eric Evans wrote: During the 0.6 cycle Ivy was introduced to manage (most of) our dependencies, and where possible, jars were removed from svn and no longer included in binary release artifacts. Recently though this change has been called into