Re: ETL Tools to transfer data from Cassandra into other relational databases

2012-12-14 Thread Шамим
Hello Chin, you can extract delta using pig script and save it in another CF in Cassandra. By using Pentaho kettle you can then load the data from the CF to RDBMS. Pentaho Kettle is open source project. All of the process you can automate through Azkaban or Ozzie. Kafka is also an alternatives

Re: State of Cassandra and Java 7

2012-12-14 Thread Sylvain Lebresne
What kind of official statement do you want? As far as I can be considered an official voice of the project, my statement is: various people run in production with Java 7 and it seems to work. Or to answer the initial question, the only issue related to Java 7 that I know of is CASSANDRA-4958,

Re: ETL Tools to transfer data from Cassandra into other relational databases

2012-12-14 Thread Carlos
I wrote an ETL tool for Cassandra which is based on scanning the binary commit log of each node, extracting which keys have received inserts, filtering them by the column timestamp to only select the last X minutes mutations, then it issues a multiget to Cassandra to get the freshest version of

Re: State of Cassandra and Java 7

2012-12-14 Thread Aaron Turner
Does Datastax (or any other company) support Cassandra under Java 7? Or will they tell you to downgrade when you have some problem, because they don't support C* running on 7? At least that would be one way of defining officially supported. On Fri, Dec 14, 2012 at 2:22 AM, Sylvain Lebresne

Re: Null Error Running pig_cassandra

2012-12-14 Thread James Schappet
I was able to resolr this issue by removing Hadoop from the class path. On Wednesday, December 12, 2012, aaron morton wrote: there is about 3 checks that should have caught the Null. at org.apache.cassandra.hadoop.ConfigHelper.getInputSlicePredicate(ConfigHelper.java:176) This line

Re: State of Cassandra and Java 7

2012-12-14 Thread Drew Kutcharian
In addition, the DataStax official documentation states: Versions earlier than 1.6.0_19 should not be used. Java 7 is not recommended. http://www.datastax.com/docs/1.1/install/install_rpm On Dec 14, 2012, at 9:42 AM, Aaron Turner synfina...@gmail.com wrote: Does Datastax (or any other

Re: State of Cassandra and Java 7

2012-12-14 Thread Peter Lin
for what it's worth, I'm running on java 7 with 1.1.x release without any problems. On Fri, Dec 14, 2012 at 2:43 PM, Drew Kutcharian d...@venarc.com wrote: In addition, the DataStax official documentation states: Versions earlier than 1.6.0_19 should not be used. Java 7 is not recommended.

Re: State of Cassandra and Java 7

2012-12-14 Thread Bill de hÓra
At least that would be one way of defining officially supported. Not quite, because, Datastax is not Apache Cassandra. the only issue related to Java 7 that I know of is CASSANDRA-4958, but that's osx specific (I wouldn't advise using osx in production anyway) and it's not directly related to

Read operations resulting in a write?

2012-12-14 Thread Michael Theroux
Hello, We have an unusual situation that I believe I've reproduced, at least temporarily, in a test environment.  I also think I see where this issue is occurring in the code. We have a specific column family that is under heavy read and write load on a nightly basis.   For the purposes of