Re: Cassandra Client authentication and system table replication question

Hi Anand, Yes you should change the replication factor of the system_auth keyspace. By default it is RF = 1 and it s very dangerous in production. If you loose one node an user can loose all access.(it is a SPOF) You should use a multi DC replication for this keyspace. Regards, Julien 2014-04

Re: Cassandra 1.1.6 - Disk usage and Load displayed in ring doesn't match

Hi, When you are increasing the RF, you need to perform repair for the keyspace on each node.(Because datas are not automaticaly streamed). After that you should perform a cleanup on each node to remove obsolete sstable. Good luck :) Julien Campan. 2013/12/18 Aaron Morton > -

Re: Updates is not happening when using the same time stamp.

choose between them. In the code, for this case, they add something that returns the first result from the lexical-order. I think that doing many updates with same timestamp is not a good pattern with Cassandra and you should try to find another way to perform yours operations. Julien CAMPAN

Re: Nodetool cleanup

or the repair. After the compaction this is >> streamed to the different nodes in order to repair them. >> >> If you trigger this on every node simultaneously you basically take the >> performance away from your cluster. I would expect cassandra still to >> function, ju

Nodetool cleanup

Hi, I'm working with Cassandra 1.2.2 and I have a question about nodetool cleanup. In the documentation , it's writted " Wait for cleanup to complete on one node before doing the next" I would like to know, why we can't perform a lot of cleanup in a same time ? Thanks

Re: Simple test of adding a node causes data loss

adding the new server address in the seeds list and normally should work :) You should add your new node into the seeds list only after the bootstrap operation. Julien Campan 2013/11/21 Tamar Rosen > Hi, > > We are testing the process of adding a node to a cluster using

Re: Read inconsistency after backup and restore to different cluster

space_name/cf_name/ 4 Use sstableloader to load the sstable of each repository. Sstableloader guarantees putting the data on a good node. 5 Make a repair on each node. Sstableloader is the right tool to make this kind of operation. Good luck :) Julien Campan. 2013/11/19 Aaron Morton > we

Re: quick question on seed nodes configuration

down at the same time , you can put only three nodes. Julien Campan 2013/6/24 Hiller, Dean > For ease of use, we actually had a single cassandra.yaml deployed to every > machine and a script that swapped out the token and listen address. I had > seed nodes ip1,ip2,ip3 as the seeds b

Re: Interview request on SaaS NoSQL databases

Hi Chistophe, I noticed your email just now. Do you still need some feedback for your thesis on NoSQL? Cheers, Julien 2013/4/8 Christophe Caron > Hi all, > > I'm currently preparing my master's thesis in IT sciences at Itescia > school and UPMC university in France. This thesis focuses on NoS

Re: Alter table drop column seems not working

sandra Consultant > New Zealand > > @aaronmorton > http://www.thelastpickle.com > > On 3/04/2013, at 8:11 PM, julien Campan wrote: > > Hi, > > I'm working with cassandra 1.2.2. > > When I try to drop a column , it's not working. > > This is

Alter table drop column seems not working

Hi, I'm working with cassandra 1.2.2. When I try to drop a column , it's not working. This is what I tried : CREATE TABLE cust ( ise text PRIMARY KEY, id_avatar_1 uuid, id_avatar_2 uuid, id_avatar_3 uuid, id_avatar_4 uuid ) ; cqlsh> ALTER TABLE cust DROP id_avatar_1 ; ==>Bad Reques

Re: Repair -pr with vnodes incompatibilty ?

Ok, thank for the answer. I have created a bug report : number 5329. 2013/3/11 Sylvain Lebresne > > It seems to me that the "repair –pr" is not compatible with vnode cluster. >> is it true ? >> > > I'm afraid that's probably true. "repair --pr" should repair every > "primary range" for all