Re: The Difference Between Cassandra and HBase

2010-04-26 Thread Masood Mortazavi
On Sat, Apr 24, 2010 at 10:20 AM, dir dir wrote: > In general what is the difference between Cassandra and HBase?? > > Thanks. > Others have already said it ... Cassandra has a peer architecture, with all peers being essentially equivalent (minus the concept of a "seed," as far as I can tell).

Re: questions about consistency

2010-04-21 Thread Masood Mortazavi
Hi Daniel, For a general theoretical understanding, try reading some of the papers on eventual consistency by Werner Vogels. Reading the SOSP'07, Dynamo paper would also help with some of the theoretical foundations and academic references. To get even further into it, try reading Replication T

Re: 0.6 insert performance .... Re: [RELEASE] 0.6.1

2010-04-20 Thread Masood Mortazavi
-Dcom.sun.management.jmxremote.authenticate=false" > > > On Tue, Apr 20, 2010 at 5:46 AM, Masood Mortazavi < > masoodmortaz...@gmail.com> wrote: > >> Minimizing GC pauses or minimizing time slots allocated to GC pauses -- >> either through configuration or r

Re: 0.6 insert performance .... Re: [RELEASE] 0.6.1

2010-04-19 Thread Masood Mortazavi
as well with 0.6, heap usage graphs look almost > identical. The GC is a noticeable bottleneck, we’ve tried jdku19 and jrockit > vm’s. It basically kills any kind of soft real time behavior. > > > > *From:* Masood Mortazavi [mailto:masoodmortaz...@gmail.com] > *Sent:*

0.6 insert performance .... Re: [RELEASE] 0.6.1

2010-04-19 Thread Masood Mortazavi
I wonder if anyone can use: * Add logging of GC activity (CASSANDRA-813) to confirm this: http://www.slideshare.net/schubertzhang/cassandra-060-insert-throughput - m. On Sun, Apr 18, 2010 at 6:58 PM, Eric Evans wrote: > > Hot on the trails of 0.6.0 comes our latest, 0.6.1. This stable point

Re: Deployment on AWS

2010-04-04 Thread Masood Mortazavi
See here: http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/index.html?concepts-regions-availability-zones.html (My question remains. I'm interested in seed configuration practice/recipe when deploying on AWS. In the scenario, assume Cassandra sits behind some other part of the service --

Deployment on AWS

2010-04-02 Thread Masood Mortazavi
Is there a ready recipe for deploying a Cassandra cluster in AWS? ... (Seeds need some "fixed" IP addresses.) Regards, - m.