Re: Migrating from Mysql to Cassandra

2010-10-02 Thread Peter Schuller
>   4) If we delete a record in clustered environment (In a single node), > after that before sync with remaining nodes the node got failure means we > wont have the data consistency - how to handle it. This database wont follow > ACID properties, how to handle this one for a huge ERP kind of appli

Re: Dazed and confused with Cassandra on EC2 ...

2010-10-02 Thread Peter Schuller
(sorry for the delay in following up on this thread) >  Actually, there's a question - is it 'acceptable' do you think >  for GC to take out a small number of your nodes at a time, >  so long as the bulk (or at least where RF is > nodes gone >  on STW GC) of the nodes are okay?  I suspect this is

Re: UnavailableException when data grows

2010-10-02 Thread Peter Schuller
> And I'm still getting UnavailableException and TimedOutException when there > Cassandra daemon is doing either Compaction or Garbage collection... Have you specifically correlated this? If so, which one, or both? GC should not cause unavailable exceptions on a healthy cluster with healthy nodes

Re: Question on Twissandra

2010-10-02 Thread Eric Evans
On Sat, 2010-10-02 at 20:46 +0530, Dipti Mathur wrote: > We have done the following: > > 1. Installed Cassandra (checked the cli - all works well) * > apache-cassandra-0.6.5 *from http://cassandra.apache.org/ AND > necessary python-cassandra-0.6.1 modules. > I already have django and other depende

Re: [RELEASE] 0.7.0 beta2

2010-10-02 Thread Eric Evans
On Sat, 2010-10-02 at 10:18 +0200, gabriele renzi wrote: > > If you're coming from 0.6, there are some things to be aware of, so > > be sure to read the release notes[2]. > > should the release notes have the sentence >"Stand up your cluster with the 0.7 version. " > kind of seems start up to

Question on Twissandra

2010-10-02 Thread Dipti Mathur
Hi All, I am a newbie to cassandra so my apologies if this question sounds trivial to most of you. My friends and I have been trying to make the source code of twissandra work so we can begin understanding how things work. We were sort of hoping to do our final semester project in Cassandra rather

Re: [RELEASE] 0.7.0 beta2

2010-10-02 Thread gabriele renzi
On Fri, Oct 1, 2010 at 8:56 PM, Eric Evans wrote: > > If you're coming from 0.6, there are some things to be aware of, so be > sure to read the release notes[2]. should the release notes have the sentence "Stand up your cluster with the 0.7 version. " kind of seems start up to me, but I may