Multi-dc restart impact

We have a 2 DC cluster running cassandra 1.2.9. They are in actual physically separate DCs on opposite coasts of the US, not just logical ones. The primary use of this cluster is CL.ONE reads out of a single column family. My expectation was that in such a scenario restarts would have

Is CAS working in Cassandra 2.0?

Hello, I wanted to use the new CAS functionality in Cassandra 2.0 and for some reason it does not work when I try to update or insert a row when CAS fails. Let me show: I have a fresh installation of Cassandra 2.0 on my Mac OS filled with a keyspace and this column family: CREATE TABLE

Re: Key cache size

You may have hit memory pressure caising cassandra to resize your cache. You can change the behavior by modifying reduce_cache_capacity_at in cassandra.yaml See the comments in such for details. On Sep 4, 2013 4:08 PM, Daning Wang dan...@netseer.com wrote: We noticed that key cache could not be

Security?

Does Cassandra have any security features to restrict access or does this have to be done at the business tier? Thanks. Les [CONFIDENTIALITY AND PRIVACY NOTICE] Information transmitted by this email is proprietary to Medtronic and is intended for use only by the individual or entity to

RE: Security?

Thanks for the info. So open-source Cassandra does not provide for auditing? -Original Message- From: Jeremy Hanna [mailto:jeremy.hanna1...@gmail.com] Sent: Thursday, September 05, 2013 9:47 AM To: user@cassandra.apache.org Subject: Re: Security? For open-source Cassandra, there is a

Re: Security?

For open-source Cassandra, there is a framework for security (see the security book-thing in the sidebar): http://www.datastax.com/documentation/cassandra/1.2/webhelp/index.html For those wanting additional things like auditing and other features, there's DataStax Enterprise:

Client SSL - cassandra-cli -OK, cqlsh -Problem

I am having a problem connecting via SSL using cqlsh. If I try with the cassandra-cli command: cassandra-cli -ts /etc/cassandra/conf/.truststore -tspw password -h host -p 9160 -tf org.apache.cassandra.cli.transport.SSLTransportFactory it connects fine. If I try with cqlshrc [root@ccluster1 ~]#

SSTableReader support files in Distribute File System

Hi, I don't think currently Cassandra can support this, but if it does, can someone tell me how, or is it reasonable to ask this feature and where should I submit it to? I am thinking that SSTableReader class, and underline supporting classes, should support handling the files in a DFS, like

Re: Maintain backup for single node cluster

On Thu, Sep 5, 2013 at 1:39 PM, Ertio Lew ertio...@gmail.com wrote: I would like to have a single node cassandra cluster initially but to maintain backups for single node how about occasionally temporarily adding a second node (one that would contain the backup, this could be my dev machine

Maintain backup for single node cluster

I would like to have a single node cassandra cluster initially but to maintain backups for single node how about occasionally temporarily adding a second node (one that would contain the backup, this could be my dev machine as well, far far from first node in some remote datacenter) to cluster

Re: Custom data type is not work at C* 2.0

I think your class is missing a required public TypeSerializerVoid getSerializer() {} method This is what you need to derive from

Re: Security?

Right so the auditing feature is one that is only in the DataStax Enterprise version. This sub-topic in the DSE documentation describes what's in Apache Cassandra versus what's in DataStax Enterprise with respect to security:

Re: Custom data type is not work at C* 2.0

Thanks to your reply, this problem has been solved. I was making a mistake which uses AbstractType of a version 1.2.9. 2013/9/6 Dave Brosius dbros...@mebigfatguy.com I think your class is missing a required public TypeSerializerVoid getSerializer() {} method This is what you need to

Help on Cassandra Limitaions

Hi, http://wiki.apache.org/cassandra/CassandraLimitations In the above link, I found the below limitation, The maximum number of cells (rows x columns) in a single partition is 2 billion.. Here what does partition mean ? Is it node (or) column family (or) anything else ? Thanks, Ramesh

Re: Help on Cassandra Limitaions

I asked the same thing earlier and this is what patrick mcfadin replied: It's not worded well. Essentially it's saying there is a 2B limit on a row. It should be worded a 'CQL row' I hope helps. Cheers, Hannu On 6.9.2013, at 8.20, J Ramesh Kumar rameshj1...@gmail.com wrote: Hi,