Re: [Cassandra] Replacing Cassandra's default reconciler

From: Emalayan Vairavanathan To: "user@cassandra.apache.org" Sent: Thursday, 27 June 2013 12:20 AM Subject: [Cassandra] Replacing Cassandra's default reconciler Hi All, I want to replace Cassandra's default reconciler by my application specific reconciler. Can someone

[Cassandra] Replacing Cassandra's default reconciler

Hi All, I want to replace Cassandra's default reconciler by my application specific reconciler. Can someone tell me how I can do this in Cassandra 1.2 ? Currently I am using CQL to interact with Cassandra. Thank you Emalayan

Re: [Cassandra] Running node tool cleanup

From: Robert Coli To: user@cassandra.apache.org; Emalayan Vairavanathan Sent: Thursday, 20 June 2013 10:03 AM Subject: Re: [Cassandra] Running node tool cleanup On Thu, Jun 20, 2013 at 12:01 AM, Emalayan Vairavanathan wrote: > 1) What will happen if I run nodetool clea

[Cassandra] Replacing a cassandra node

Hi All, I have a question. In the case where replace a cassandra node (call it node A) with another one that has the exact same IP (ie. during a node failure), what exactly should we do?  Currently I understand that we should at least run "nodetool repair".  I noticed that the cassandra system

[Cassandra] Running node tool cleanup

Hi All, 1) What will happen if I run nodetool cleanup immediately after bringing a new node up (i.e. before the key migration process is completed) ?         Will it cause some race conditions ? Or will it result in some part of the space never be reclaimed ? 2) After adding a new machine, how

Re: [Cassandra] Expanding a Cassandra cluster

? 2) How can I figure out the status of key migration in Cassandra? Thank you Emalayan  From: Richard Low To: user@cassandra.apache.org; Emalayan Vairavanathan Sent: Tuesday, 18 June 2013 12:11 AM Subject: Re: [Cassandra] Expanding a Cassandra cluster On 10

Cassandra 2.0 new features ?

Hi All, Can anyone tell me about the new features that are going to come in Cassandra 2.0 ? Thank you Emalayan

Re: [Cassandra] Expanding a Cassandra cluster

  From: Robert Coli To: user@cassandra.apache.org; Emalayan Vairavanathan Sent: Monday, 10 June 2013 5:15 PM Subject: Re: [Cassandra] Expanding a Cassandra cluster On Mon, Jun 10, 2013 at 3:13 PM, Emalayan Vairavanathan wrote: > I suspect that nodetool cleanup is IO intensive. So runn

Re: [Cassandra] Expanding a Cassandra cluster

concurrently on the entire cluster ? Thank you Emalayan From: Edward Capriolo To: "user@cassandra.apache.org" ; Emalayan Vairavanathan Sent: Monday, 10 June 2013 2:53 PM Subject: Re: [Cassandra] Expanding a Cassandra cluster You eventually should run

[Cassandra] Expanding a Cassandra cluster

Hi All, Datastax manual suggests that during a Cassandra cluster expansion, an administrator has to run nodetool cleanup on each of the previously existing Cassandra nodes to remove the keys that are no longer belonging to those nodes. Further the manual says that thenodetool cleanup  task shou

Re: [Cassandra] Conflict resolution in Cassandra

I tried google and found conflicting answers. Thats why wanted to double check with user forum.  Thanks From: Bryan Talbot To: user@cassandra.apache.org; Emalayan Vairavanathan Sent: Thursday, 6 June 2013 3:19 PM Subject: Re: [Cassandra] Conflict resolution

[Cassandra] Conflict resolution in Cassandra

Hi All, Can someone tell me about the conflict resolution mechanisms provided by Cassandra? More specifically does Cassandra provides a way to define application specific conflict resolution mechanisms (per row basis  / column basis)?             or  Does it automatically manage the conflicts b

Re: Creating namespace and column family from multiple nodes concurrently

command to and try to create exactly same namespace and column families. Thank you Emalayan From: Arthur Zubarev To: Emalayan Vairavanathan ; user@cassandra.apache.org Sent: Thursday, 23 May 2013 1:15 PM Subject: Re: Creating namespace and column family from

Re: Creating namespace and column family from multiple nodes concurrently

"Would each device/machine have its own keyspace?" No. All the machines are going to run the exactly same CQL commands and going to create the same namespace and column families. Thank you Emalayan From: Arthur Zubarev To: Emalayan Vairavanat

Re: Creating namespace and column family from multiple nodes concurrently

-Original Message- From: Emalayan Vairavanathan To: user Sent: Wed, May 22, 2013 8:31 pm Subject: Creating namespace and column family from multiple nodes concurrently Hi all, I am implementing a distributed application which runs on 100s of machines concurrently. This application is going to

Creating namespace and column family from multiple nodes concurrently

Hi all, I am implementing a distributed application which runs on 100s of machines concurrently. This application is going to use Cassandra as underlaying storage. The application creates the schema (name space and column families) during initialization phase.  It seems I have two options to cr