[RELEASE] 0.6.2

Just in time for those Memorial Day weekend maintenance windows, I give you, Apache Cassandra 0.6.2. You can check out a summary of what's changed here[1], or you can trust that it's awesome and go straight to the download page[2]. I can smell the upgrades from here. [1]: http://bit.ly/b3E9GS

Help to understand a strange behavior with DCQUORUM

Hi all, I need to help to understand how DCQUORUM works. This is my setup: - Cluster with 3 Cassandra Nodes - RF = 3 - ReplicatePlacementStrategy = RackUnawareStrategy My test: - I write/read with DCQUORUM Results: - While the 3 nodes are UP, all my writes and read succeed. (the nodes are reach

Re: Thoughts on adding complex queries to Cassandra

I wonder if any of the main project committers would like to weigh in on what a desired API would look like, or perhaps we should start an unscheduled Jira ticket? On Thu, May 27, 2010 at 5:39 PM, Jake Luciani wrote: > I had this: > > > string slice_dice_reduce(1:required list key, >

Re: how does communication between nodes works?

>From what I can tell nodes talk to each other directly via TCP/IP sockets. Look at IncomingTcpConnection and OutboundTcpConnection under org.apache.cassandra.net - they both use java.net.Socket for communication purposes. On Fri, May 28, 2010 at 11:32 AM, Gabriel Sosa wrote: > I've been trying t

how does communication between nodes works?

I've been trying to find some deep documentation about the way on how the nodes communicate between them. I've been reading http://wiki.apache.org/cassandra/ArchitectureInternals but I couldn't find anything there I'm trying to learn how this works. Is it using thirft or thirft its only used for

Re: ec2 tests

On Fri, May 28, 2010 at 3:48 PM, Mark Greene wrote: > First thing I would do is stripe your EBS volumes. I've seen blogs that say > this helps and blogs that say it's fairly marginal. just to point out: another option is to stripe the ephemeral drives (if using instances > small)

Re: Avro: C# support

There is JIRA ticket for .NET support in Avro - https://issues.apache.org/jira/browse/AVRO-533 On Fri, May 28, 2010 at 10:01 AM, Stephan Pfammatter < stephan.pfammat...@logmein.com> wrote: > Q: Are the plans for Avro to support C#? >

Avro: C# support

Q: Are the plans for Avro to support C#?

Re: ec2 tests

First thing I would do is stripe your EBS volumes. I've seen blogs that say this helps and blogs that say it's fairly marginal. (You may want to try rackspace cloud as they're local storage is much faster.) Second, I would start out with N=2 and set W=1 and R=1. That will mirror your data across t

Re: Cassandra CF sharding

Hello! Thank you. In 1) I hope, that processing smaller files will be more easy to monitor. Also, if we have disk failure, we can delete just one file and repair, for example. Actually, CF per customer will be the best (easy to delete/backup specified customer data only, customers are totally

Re: remove a row

On Fri, May 28, 2010 at 11:05 AM, huajun qi wrote: > Is there anyway to remove a row completely? > I use thrift client's remove method , it only deletes the columns under a > row, but the row with its key is still there. > How can I remove it completely? you can't really, with the thrift api, s

remove a row

Is there anyway to remove a row completely? I use thrift client's remove method , it only deletes the columns under a row, but the row with its key is still there. How can I remove it completely? -- Location:

Re: Batch_Mutate throws Uncaught exception

Hi sorry for the post I was wrong in understanding key and column family I was in the thinking cache_pages is the column family and Page is the key but its the other way right I will update my code and check it again. Thanks, Moses On Thu, May 27, 2010 at 3:46 PM, Mishail wrote: > Hi, > > Jus

Re: ec2 tests

Mark Greene writes: > If you give us an objective of the test that will help. Trying to get max > write throughput? Read throughput? Weak consistency? I would like reading to be as fast as I can get. My real-world problem is write heavy, but the latency requirements are minimal on that side. If