OOM on heavy write load

2011-04-22 Thread Nikolay Kоvshov
I am using Cassandra 0.7.0 with following settings binary_memtable_throughput_in_mb: 64 in_memory_compaction_limit_in_mb: 64 keys_cached 1 million rows_cached 0 RAM for Cassandra 2 GB I run very simple test 1 Node with 4 HDDs (1 HDD - commitlog and caches, 3 HDDs - data) 1 KS => 1 CF => 1 Colum

Re: OOM on heavy write load

2011-04-22 Thread Jonathan Ellis
(0) turn off swap (1) http://www.datastax.com/docs/0.7/troubleshooting/index#nodes-are-dying-with-oom-errors On Fri, Apr 22, 2011 at 8:00 AM, Nikolay Kоvshov wrote: > I am using Cassandra 0.7.0 with following settings > > binary_memtable_throughput_in_mb: 64 > in_memory_compaction_limit_in_mb: 6

Concern on HeartBeatState Generation

2011-04-22 Thread Maki Watanabe
Hello, I found Gossipper is initiated with seconds from Unix Epoch (=System.currentTimeMillis() / 1000) for HeartBeatState Generation. Do we get same generation value at very quick restart? Are there any risk here? regards, maki

sstable2json

2011-04-22 Thread Subrahmanya Harve
Hi, Is there a tool similar to sstable2json that can be used to convert data in commitlog to json? Or does sstable2json let us read the commitlog as well? Regards, smh.

Re: Cassandra 0.7.4 Bug?

2011-04-22 Thread Alexis Lê-Quôc
I've had a related issue in the past: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Gossip-mysteries-0-7-4-on-EC2-td6217786.html No resolution so far. By restarting everything the problem went away. On Sun, Apr 17, 2011 at 3:23 PM, csharpplusproject wrote: > Shimi, > > Chag Sam

Re: Manual Conflict Resolution in Cassandra

2011-04-22 Thread Edward Capriolo
On Fri, Apr 22, 2011 at 4:31 PM, Milind Parikh wrote: > Is there a chance of getting manual conflict resolution in Cassandra? > Please see attachment for why this is important in some cases. > > Regards > Milind > > I think about this often. LDAP servers like SunOne have pluggable conflict resolu

[RELEASE] Apache Cassandra 0.8.0 beta1

2011-04-22 Thread Eric Evans
I am pleased to announce the release of Apache Cassandra 0.8.0 beta1. The 0.8 series is shaping up nicely and is packed with Awesome. For example, wouldn't it be great if you could perform major upgrades without bringing the entire cluster to a complete stop? Well, starting with 0.8, backward c

Re: Can the Cassandra to be hosted, with all your features and performance, on Microsoft Azure ?

2011-04-22 Thread Stephane Legay
Do you have anything to report on this? We're considering a move to Azure, but Cassandra is the big unknown here. I guess we could spawn some VM role instances and snapshot them regularly, but if anyone's actually tried it, that would save us quite a bit of time. Thanks! On Wed, Mar 23, 2011 at 7

multiple nodes sharing the same IP

2011-04-22 Thread Tomas Vondra
Hi all, I have a very simple question - is it possible to operate multiple cassandra nodes on the same IP? I'm a complete newbie so I've been playing with a bunch of local nodes, struggling to build a ring. It took me a lot of time until I set up two nodes on diffent IP addresses (localhost and a

Re: Concern on HeartBeatState Generation

2011-04-22 Thread Jonathan Ellis
No -- see SystemTable.incrementAndGetGeneration. On Fri, Apr 22, 2011 at 10:38 AM, Maki Watanabe wrote: > Hello, > I found Gossipper is initiated with seconds from Unix Epoch > (=System.currentTimeMillis() / 1000) >  for HeartBeatState Generation. > Do we get same generation value at very quick r

Jetty Configuration

2011-04-22 Thread Ashlee Saunders
Hello Team, I am currently load testing Jetty 7. The Box: Ubuntu Server 10.10 Intel Core 2 Duo E8400 3GHz 4GB Ram ASUS P2K motherboard 160GB HDD No Raid at the present. The application: Liftweb (scala) run on JVM 1.6, NGinx proxy/loadbalancer, Jetty 7, Memcached, PostgreSQL, Cassandra. I am fi

Re: sstable2json

2011-04-22 Thread Jonathan Ellis
No. On Fri, Apr 22, 2011 at 3:22 PM, Subrahmanya Harve wrote: > Hi, > > Is there a tool similar to sstable2json that can be used to convert data in > commitlog to json? Or does sstable2json let us read the commitlog as well? > > Regards, > smh. > -- Jonathan Ellis Project Chair, Apache Cassan

Re: multiple nodes sharing the same IP

2011-04-22 Thread Jonathan Ellis
You really need different IPs. 2011/4/22 Tomas Vondra : > Hi all, > > I have a very simple question - is it possible to operate multiple > cassandra nodes on the same IP? > > I'm a complete newbie so I've been playing with a bunch of local nodes, > struggling to build a ring. It took me a lot of t

Re: multiple nodes sharing the same IP

2011-04-22 Thread Tomas Vondra
Dne 23.4.2011 03:08, Jonathan Ellis napsal(a): > You really need different IPs. OK, thanks. Is there some reason for that? Because if you can't specify the port for the seeds (which seems like the reason why different IPs are needed), then you actually can't change the port at all. So the rpc port

Re: Concern on HeartBeatState Generation

2011-04-22 Thread Watanabe Maki
Thanks! From iPhone On 2011/04/23, at 9:31, Jonathan Ellis wrote: > No -- see SystemTable.incrementAndGetGeneration. > > On Fri, Apr 22, 2011 at 10:38 AM, Maki Watanabe > wrote: >> Hello, >> I found Gossipper is initiated with seconds from Unix Epoch >> (=System.currentTimeMillis() / 1000)

Re: Compacting single file forever

2011-04-22 Thread Terje Marthinussen
I think the really interesting part is how this node ended up in this state in the first place. There should be somewhere in the area of 340-500GB of data on it in when everything is 100% compacted. Problem now is that it used (we wiped it last night to test some 0.8 stuff) more then 1TB. To me,