RE: error using get_range_slice with random partitioner

Hi Thomas, Can you share your client code for the iteration? It would probably help me catch my problem. Anyone know where in the cassandra source the integration tests are for this functionality on the random partitioner? Note that I posted a specific example where the iteration failed and I w

Re: TokenRange contains endpoints without any port information?

On Sun, Aug 8, 2010 at 07:21, Carsten Krebs wrote: > > I'm wondering why a TokenRange returned by describe_ring(keyspace) of the > thrift API just returns endpoints consisting only of an address but omits any > port information? > My first thought was, this method could be used to expose some in

Question on nodetool ring

I'm running a 2 node cluster and when I run nodetool ring I get the following output Address Status State LoadToken 160032583171087979418578389981025646900 127.0.0.1 Up Normal 42.28 MB 42909338385373526599163667549814010

Re: Question on load balancing in a cluster

Cool thanks, I think I will experiment with nodetool move. Can somebody confirm on the reason for decommissioning, instead of just splitting the token on the fly? Yes it does seem simpler to just decommission and bootstrap, but that does mean a lot of data has to be moved around to get a reasonab

Re: batch_mutate atomicity

> I am using the familiar meanings from ACID: > > atomic means either the entire update will succeed or none of it. > > isolated means other threads will not see partial updates while it is > being applied. A related concern is whether there is a write *ordering* guarantee for mutations within a r

COMMIT-LOG_WRITER Assertion Error

Just throwing this out there as it could be a concern. I had a cluster of 3 nodes running. Over the weekend I updated to trunc (Aug 9th @ 2pm). Today, I came to run my daily tests and my client kept giving me TSocket timeouts. Checking the error log of Cassandra servers, all 3 nodes had this and

Re: Question on nodetool ring

that's the token range so node#1 is from 1600.. to 429.. node#2 is from 429... to 1600... hopefully others can chime into confirm. On Mon, Aug 9, 2010 at 12:30 PM, Mark wrote: > I'm running a 2 node cluster and when I run nodetool ring I get the > following output > > Address Status St

Re: Question on nodetool ring

On 8/9/10 12:51 PM, S Ahmed wrote: that's the token range so node#1 is from 1600.. to 429.. node#2 is from 429... to 1600... hopefully others can chime into confirm. On Mon, Aug 9, 2010 at 12:30 PM, Mark > wrote: I'm running a 2 node cluster and when I r

Growing commit log directory.

I have a 16 node 6.3 cluster and two nodes from my cluster are giving me major headaches. 10.71.71.56 Up 58.19 GB 10827166220211678382926910108067277| ^ 10.71.71.61 Down 67.77 GB 123739042516704895804863493611552076888v | 10.71.71.66 Up 43.51 GB 12760588

Re: TokenRange contains endpoints without any port information?

On 08.08.2010, at 14:47 aaron morton wrote: > > What sort of client side load balancing where you thinking of? I just use > round robin DNS to distribute clients around the cluster, and have them > recycle their connections every so often. > I was thinking about to use this method to give the

2 nodes on one machine

Hello users, I'm a total Cassandra noob beside what I read about it, so please be patient :) I want to setup a cluster with 2 nodes on one VirtualBox-ed CentOS. I don't really want to start with the single node example, but with my desired setup. Do I have to do much more than to have 2 netw

Re: Question on nodetool ring

b/c node#1 has a start and end range, so you can see the boundaries for each node by looking at the last column. On Mon, Aug 9, 2010 at 4:12 PM, Mark wrote: > On 8/9/10 12:51 PM, S Ahmed wrote: > > that's the token range > > so node#1 is from 1600.. to 429.. > node#2 is from 429... to 1600...

Re: Growing commit log directory.

if your commit logs are not getting cleared, doesn't that indicate your load is more than your servers can handle? On Mon, Aug 9, 2010 at 4:50 PM, Edward Capriolo wrote: > I have a 16 node 6.3 cluster and two nodes from my cluster are giving > me major headaches. > > 10.71.71.56 Up 58.

Re: row cache during bootstrap

On Sun, Aug 8, 2010 at 5:24 AM, aaron morton wrote: > Not sure how feasible it is or if it's planned. But it would probably > require that the nodes are able so share the state of their row cache so as > to know which parts to warm. Otherwise it sounds like you're assuming the > node can hold the

Re: backport of pre cache load

No we aren't caching 100%, we cache over 20 - 30 million which only starts to get a high hit rate overtime so to have a useful cache can take over a week of running. We would love to store the complete CF in memory but know know of a server that can hold that much data in memory while still being

Re: TokenRange contains endpoints without any port information?

The FAQ lists Round-Robin as the recommended way to find a node to connect to...http://wiki.apache.org/cassandra/FAQ#node_clients_connect_toAs you say, your clients need to retry anyway. I have them hold the connection for a while (on the scale of minutes), then hit the DNS again and acquire a new

Re: 2 nodes on one machine

http://www.onemanclapping.org/2010/03/running-multiple-cassandra-nodes-on.htmlAlso some recent discussion on the users list. AaronOn 10 Aug, 2010,at 08:58 AM, Pavlo Baron wrote:Hello users, I'm a total Cassandra noob beside what I read about it, so please be patient :) I want to setup a cluster

Re: 2 nodes on one machine

cool, thank you Aaron, I'll check it out through the next days and post the results Pavlo Am 10.08.2010 00:11, schrieb Aaron Morton: http://www.onemanclapping.org/2010/03/running-multiple-cassandra-nodes-on.html Also some recent discussion on the users list. Aaron On 10 Aug, 2010,at 08:58

Using a separate commit log drive was 4x slower

I have a weird one to share with the list, Using a separate commit log drive dropped my performance a lot more than I would expect... I'm doing perf tests on 3 identical machines but with 3 different drive sets. (SAS 15K,10K, and SATA 7.5K) Each system has a single system disk (Same as the data se

Re: error using get_range_slice with random partitioner

Sure, but its in my ruby client which currently has close to no documentation. ;) Client is here: http://github.com/thheller/greek_architect Relevant Row Spec: http://bit.ly/9uS6Ba Row-based iteration: http://bit.ly/cRVSTc #each_slice Currently uses a "hack" since I wasnt able to produce cassan

Re: Growing commit log directory.

what does the io load look like on those nodes? On Mon, Aug 9, 2010 at 1:50 PM, Edward Capriolo wrote: > I have a 16 node 6.3 cluster and two nodes from my cluster are giving > me major headaches. > > 10.71.71.56   Up         58.19 GB > 10827166220211678382926910108067277    |   ^ > 10.71.71.

Re: COMMIT-LOG_WRITER Assertion Error

Sounds like you upgraded to trunk from 0.6 without draining your commitlog first? On Mon, Aug 9, 2010 at 3:30 PM, Arya Goudarzi wrote: > Just throwing this out there as it could be a concern. I had a cluster of 3 > nodes running. Over the weekend I updated to trunc (Aug 9th @ 2pm). Today, I > c

Re: Growing commit log directory.

what does tpstats or other JMX monitoring of the o.a.c.concurrent stages show? On Mon, Aug 9, 2010 at 4:50 PM, Edward Capriolo wrote: > I have a 16 node 6.3 cluster and two nodes from my cluster are giving > me major headaches. > > 10.71.71.56   Up         58.19 GB > 1082716622021167838292691

Re: COMMIT-LOG_WRITER Assertion Error

I've never run 0.6. I have been running of trunc with automatic svn update and build everyday at 2pm. One of my nodes got this error which lead to the same last error prior to build and restart today. Hope this helps better: java.lang.RuntimeException: java.util.concurrent.ExecutionException: j

Re: Growing commit log directory.

On Mon, Aug 9, 2010 at 8:20 PM, Jonathan Ellis wrote: > what does tpstats or other JMX monitoring of the o.a.c.concurrent stages show? > > On Mon, Aug 9, 2010 at 4:50 PM, Edward Capriolo wrote: >> I have a 16 node 6.3 cluster and two nodes from my cluster are giving >> me major headaches. >> >> 1

explanation of generated files and ops

In /var/lib/cassandra there is: /data/system LocationInfo-4-Data.db LocationInfo-4-Filter.db LocationInfo-4-Index.db .. .. /data/Keyspace1/ Standard2-2-Data.db Standard2-2-Filter.db Standard2-2-Index.db /commitlog CommitLog-timestamp.log /var/log/cassandra system.log Is this pretty much all

Re: How to migrate any relational database to Cassandra

Maybe you could integrate with Hadoop. On Mon, Aug 9, 2010 at 1:15 PM, sonia gehlot wrote: > Hi Guys, > > Thanks for sharing your experiences and valuable links these are really > helpful. > > But I want to do ETL and then wanted to load data in Cassandra. I have link > 10-15 various source