java.lang.AssertionError

2011-12-24 Thread Michael Vaknine
I have a 4 cluster environment version 1.0.3 which was upgraded from 0.7.6. I keep getting java.lang.AssertionError from time to time on my cluster. Is there anything I can do to fix the problem Thanks Michael NYC-Cass1 ERROR [NonPeriodicTasks:1] 2011-12-24 23:06:11,129 AbstractCassandra

Re: cassandra data to hadoop.

2011-12-24 Thread Jeremy Hanna
We're using cdh3 right now and we're in the process of testing out brisk/datastax enterprise right now. I know some people who copy data from Cassandra to a completely separate Hadoop cluster in EC2 at least. It just takes a bit longer because of the intermachine copy. That's better to do in

Re: cassandra data to hadoop.

2011-12-24 Thread Mohit Anchlia
You could read using Cassandra client and write to HDFS using Hadoop FS Api. On Fri, Dec 23, 2011 at 11:20 PM, ravikumar visweswara wrote: > Jeremy, > > We use cloudera distribution for our hadoop cluster and may not be possible > to migrate to brisk quickly because of flume/hue dependencies. Did

Re: Counters and Top 10

2011-12-24 Thread Janne Jalkanen
In our case we didn't need an exact daily top-10 list of pages, just a good guess of it. So the way we did it was to insert a column with a short TTL (e.g. 12 hours) with the page id as the column name. Then, when constructing the top-10 list, we'd just slice through the entire list of unexpi