Re: increased RF and repair, not working?

Quorum is defined as (replication_factor / 2) + 1 therefore quorum when rf = 2 is 2! so in your case, both nodes must be up. Really, using Quorum only starts making sense as a 'quorum' when RF=3 On 07/26/2012 10:38 PM, Yan Chunlu wrote: I am using Cassandra 1.0.2, have a 3 nodes

Re: Schema question : Query to support Find which all of these 500 email ids have been registered

Sorry for the confusion created. I need to store emails registered just for a single application. So although my data model would fit into just a single row. But is storing a hundred million columns(col name size= 8 byte; col value size=4 byte ) in a single row a good idea ? I am very much

is it possible to disable compaction per CF ?

Hello! if we are dealing with append-only data model, so what if I disable compaction on certain CF ? any side effect ? can I do it with update column family with compaction_strategy = null ? Cheers, Ilya Shipitsin

Re: is it possible to disable compaction per CF ?

setMaxCompactionThreshold(0) setMinCompactionThreshold(0) 2012/7/27 Илья Шипицин chipits...@gmail.com Hello! if we are dealing with append-only data model, so what if I disable compaction on certain CF ? any side effect ? can I do it with update column family with

Re: restoring a counter

a) how does that setting affect C* in a non-restoring start? renew_counter_id regenerates a new NodeId for the cassandra VM which is used to keep track of the counter shards the node holds. If you regenerate node ids on each restart, you will most likely corrupt your counter data. The

Re: Schema question : Query to support Find which all of these 500 email ids have been registered

What about if I spread these columns across 20 rows ? Then I have to query each of these 20 rows for 500 columns. but still this seems a better solution than one row for all cols or separate row for each email id approaches !? On Fri, Jul 27, 2012 at 11:36 AM, Aklin_81 asdk...@gmail.com wrote:

Re: Questions regarding DataStax AMI

HI! I tried starting a cluster with Cluster started with these options: --clustername Name --totalnodes 3 --version community --release 1.0.8 But Cassandra's version is 1.1.2 Thanks *Tamar Fraenkel * Senior Software Engineer, TOK Media [image: Inline image 1] ta...@tok-media.com Tel: +972 2

Re: Unreachable node, not in nodetool ring

Hi again, Nobody has a clue about this issue ? I'm still facing this problem. Alain 2012/7/23 Alain RODRIGUEZ arodr...@gmail.com: Does anyone knows how to totally remove a dead node that only appears when doing a describe cluster from the cli ? I still got this issue in my production

Re: Unreachable node, not in nodetool ring

nope my last ideas would be (and I am not sure these are the best) - try removetoken with -f option. I do not believe it will change anything but... - try nodeltool ring on ALL nodes and check all nodes see the unreachable node. If not, you could maybe juste decommission the one(s) that see

Re: increased RF and repair, not working?

Dave, per my understanding of Yan's description he has 3 nodes and took one down manually to test; that should have worked, no? On Thu, Jul 26, 2012 at 11:00 PM, Dave Brosius dbros...@mebigfatguy.comwrote: Quorum is defined as (replication_factor / 2) + 1 therefore quorum when rf = 2 is 2!

Re: increased RF and repair, not working?

I think Dave is right, I have read this article again: http://thelastpickle.com/2011/07/04/Cassandra-Query-Plans/ I have data on two nodes, and QUORUM read means it need read from both two nodes. I guess I need to increase the RF to 3, to make the system can tolerance one node failure. thanks

Re: increased RF and repair, not working?

Ah! Yan I think you want your writes to use QUORUM and your reads to just be a single node right? If you need/want the read-repair, then I suppose you would need more nodes up (or deployed in your cluster) but if you are keeping 3 machines a RF of 2 with a write consistency of 2 and a read of 1

Re: Unsubscribe

http://wiki.apache.org/cassandra/FAQ#unsubscribe On Fri, Jul 27, 2012 at 9:46 AM, Samir Rayani samir.ray...@gmail.comwrote: -- Tyler Hobbs DataStax http://datastax.com/

Re: increased RF and repair, not working?

You have RF=2, CL= Quorum but 3 nodes. So each row is represented on 2 of the 3 nodes.If you take a node down, one of two things can happen when you attempt to read a row.The row lives on the two nodes that are still up. In this case you will successfully read the data.The row lives on one node

Re: Connection issue in Cassandra

On Thu, Jul 26, 2012 at 11:25 PM, Adeel Akbar adeel.ak...@panasiangroup.com wrote: I used Cassandra 0.8.1 and pycasa 0.2. If I upgrade pycasa, then it have compatibility issue. please suggest You can use the latest version of pycassa with Cassandra 0.8. -- Tyler Hobbs DataStax

Re: increased RF and repair, not working?

Dave, What I was suggesting for Yan was to: WRITE: RF=2, CL=QUORUM READ: CL=ONE But you have a good pt... if he hits one of the replicas that didn't have the data, that would be bad. Thanks for clearing that up. On Fri, Jul 27, 2012 at 11:43 AM, Dave Brosius dbros...@mebigfatguy.comwrote:

Re: Questions regarding DataStax AMI

Oh you're right, sorry about that. The concept of keeping older packages was recently implemented and while using --version community, you would need --release 1.0 in order to get 1.0.10. If you are using --version enterprise, you can use --release 2.0 to get DataStax Enterprise 2.0 which comes