Re: Anybody using Cassandra/DataStax Distribution with Java Service Wrapper?

2012-02-15 Thread Paul Brown
IMHO, Tanuki and the like are fabulous in a Windows environment (e.g., to install something as a Service), but on a *nix, you're better off to just come up with your own variant of the standard shell script and hook it into the OS lifecycle in the usual way. On Feb 15, 2012, at 4:05 PM, Drew

Re: R on Cassandra

2011-11-09 Thread Paul Brown
Hi, Brian -- A little late to reply, but I'm slowly catching up. You're going to be better off, IMHO, to pull the data out of Cassandra with a tool like Pig (probably with a bit of aggregation and filtering) and then operate on it in R as a static delimited file. If you need additional

Re: Best Approaches for Developer Integration

2011-02-07 Thread Paul Brown
On Feb 7, 2011, at 10:28 PM, Paul Querna wrote: So, I guess this is coming down to: 1) Has anyone built any easy to install packages of Cassandra? I didn't find it necessary. I implemented a simple embedding wrapper for Cassandra so that it could be started as part of a web application

Re: Lucandra Limitations

2011-01-27 Thread Paul Brown
Lucene trades on (32-bit) ints internally, so I expect you're just seeing a projection of that limitation. On Jan 27, 2011, at 10:40 AM, David G. Boney wrote: I was reviewing the Lucandra schema presented on the below page at Datastax: http://www.datastax.com/docs/0.7/data_model/lucandra

Re: How to import data from MYSQL to Cassandra

2010-07-01 Thread Paul Brown
On Jul 1, 2010, at 1:33 PM, Rana Aich wrote: Can someone please please throw some light how can I import the Data from mysql into Cassandra cluster. - Is there any tool available? OR - Do I have to write my own Client using Thrift that will read the export file (*.sql) and insert the

Re: Continuously increasing RAM usage

2010-06-02 Thread Paul Brown
FWIW, I'm seeing similar issues on a cluster. Three nodes, Cassandra 0.6.1, SUN JDK 1.6.0_b20. I will try to get some heap dumps to see what's building up. I've seen this sort of issue in systems that make heavy use of java.util.concurrent queues/executors, e.g.:

Re: cassandra instability

2010-04-16 Thread Paul Brown
On Apr 16, 2010, at 10:50 AM, Lee Parker wrote: [...] I am trying to migrate data from mysql into the cluster using the following methodology: 1. get 500 rows (12 columns each) from mysql 2. build a batch_mutate to insert these rows into one CF (1 row = 1 row ) 3. build a second

Odd/incorrect getSlice behavior with 0.6.0rc1

2010-04-08 Thread Paul Brown
[Question about slice behavior from me] Bug? Misconception on my part? The answer is misconception; I interpreted the behavior of get_slice to be columns between X and Y, in ascending or descending depending on the reversed flag, but it's a little different start = X, end = Y, reversed =