Re: Cassandra OOM

2012/1/4 Vitalii Tymchyshyn > 04.01.12 14:25, Radim Kolar написав(ла): > > > So, what are cassandra memory requirement? Is it 1% or 2% of disk data? >> It depends on number of rows you have. if you have lot of rows then >> primary memory eaters are index sampling data and bloom filters. I use >>

JMX BulkLoad weirdness

Hi all, I'm trying to copy a column family from our production cluster to our development one for testing purposes, so I thought I would try the bulkload API. Since I'm lazy, I'm using the Cassandra bulkLoad JMX call from one of the development machines. Here are the steps I followed: 1. (on p

Compressed families not created on new node

I'm using Cassandra 1.0.3 on a 2 nodes cluster. My schema (with replication_factor=2) contains both compressed (with sstable_compression=DeflateCompressor) and uncompressed column families. When bootstrapping a third node, the uncompressed families are created on the new node as expected, but

RE: cassandra 1.0.6 rpm

I believe the rpm location has changed Look at the datastax documentation. Le 12 janv. 2012 23:00, "Shu Zhang" a écrit : > Hello? Does anyone know why an rpm is still not available for 1.0.6? > > Thanks, > Shu > > From: Shu Zhang > Sent: Wednesday, Decembe

About initial token, autobootstraping and load balance

Hello, I have a doubt about how initial token is determined. In Cassandra's documentation it is said that it is better to manually configure the initial token to each node in the system but also is said that if initial token is not defined and autobootstrap is true, new nodes choose initial token

Re: Installing C* on EC2

http://www.datastax.com/docs/0.8/install/install_ami Image is the best way to go find a public AMI for 1.0 Are there any known issues when running C* on EC2? - Not that i know of but we prefer Ephimeral drives rather than EBS when using local storage on EC2 since local storage is gone at that poi

Re: Installing C* on EC2

On Jan 12, 2012, at 6:36 PM, Mohit Anchlia wrote: > What's the best way to install C*? Any good links? http://www.slideshare.net/mattdennis/cassandra-on-ec2 has some interesting points that aren't immediately obvious - it's mdennis in the cassandra irc channel if you had any questions about th

CLI command for adding composite Key

Hello, Wondering how would one add Composite Keys rows using CLI. Supposing we have CF defined below: create column family ListTransactions with comparator = 'CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.IntegerType)' and keys_cached=1 and rows_cache

cassandra hit a wall: Too many open files (98567!)

I'm running a single node cassandra 1.0.6 server which hit a wall yesterday: ERROR [CompactionExecutor:2918] 2012-01-12 20:37:06,327 AbstractCassandraDaemon.java (line 133) Fatal exception in thread Thread[CompactionExecutor:2918,1,main] java.io.IOError: java.io.FileNotFoundException: /mnt/ebs/dat

Re: About initial token, autobootstraping and load balance

The documentation for that section needs to be updated... What happens is that if you just autobootstrap without setting a token it will by default bisect the range of the largest node. So if you go through several iterations of adding nodes, then this is what you would see: Gen 1: Node A: 100%

Re: About initial token, autobootstraping and load balance

Thanks David for your explanation. What happens if autobootstrap is false in the configuration file? nodes seem to choose the correct token and balance well the cluster. In this case, how did each node to select its initial token? Carlos Pérez Miguel 2012/1/13 David McNelis : > The documentatio

Re: Syncing across environments

David McNelis wrote: >Is anyone familiar with any tools that are already available to allow for >configurable synchronization of different clusters? > >Specifically for purposes of development, i.e. Dev, staging, test, and >production cassandra environments, so that you can easily plug in the >