Long running nodetool repair

Hi, I am new to Cassandra and I am not sure if this is the normal behavior but nodetool repair runs for too long even for small dataset per node. As I am writing I started a nodetool repair last night at 18:41 and now it's 9:18 and it's still running, the size of my data is only ~500mb per node. W

Testing compaction strategies on a single production server?

Hey, Version 1.1 of Cassandra introduced live traffic sampling, which allows you to measure the performance of a node without it really joining the cluster: http://www.datastax.com/dev/blog/whats-new-in-cassandra-1-1-live-traffic-sampling That page mentions that you can change the compaction stra

RE: Testing compaction strategies on a single production server?

Just turn off dynamic snitch on survey node and make read requests from it directly with CL.ONE, watch histograms, compare. Regarding switching compaction strategy there're a lot of info already. Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email: viktor.jevdoki...@adform.com

Re: cassandra vs. mongodb quick question(good additional info)

The 40 TB use case you heard about is probably one 40TB mysql machine that someone migrated to mongo so it would be "web scale" Cassandra is NOT good with drives that big, get a blade center or a high density chassis. On Mon, Feb 18, 2013 at 8:00 PM, Hiller, Dean wrote: > I thought about this mor

Re: JNA not found.

Hey Guys, I just wanted to follow up on this thread on how I go JNA to work with the cassandra 1.2.1 tarball I downloaded. On CentOS I went : [root@cassandra-node01 ~]# yum provides "*/jna.jar" ... jna-3.4.0-4.el5.x86_64 : Pure Java access to native libraries Repo:

Re: JNA not found.

based on your mount/selinux settings sometimes the os is unwilling to tolerate so files outside certain directories. Edward On Tue, Feb 19, 2013 at 10:13 AM, Tim Dunphy wrote: > Hey Guys, > > I just wanted to follow up on this thread on how I go JNA to work with the > cassandra 1.2.1 tarball I

Re: Long running nodetool repair

This is very normal (unfortunately). Are you doing a repair –pr or a straight up repair? Does nodetool netstats show anything? I frequently see repair hang in 1.2.1, and I haven't been able to figure out why yet though. Feel free to take a stack dump with jstack on the node doing the repair and

Re: Testing compaction strategies on a single production server?

Well, that answer didn't really help. I know how to make a survey node, and I know how to simulate reads to it, it's just that that's a lot of work, and I wouldn't be sure that the simulated load is the same as the production load. We gather a lot of metrics from our production servers, so we know

Re: cassandra vs. mongodb quick question(good additional info)

>From my limited experience with Mongo, it seems that Mongo only performs when >the whole data set is in the memory which makes me wonder how the 40TB data >works.. - Original Message - From: "Edward Capriolo" To: user@cassandra.apache.org Sent: Tuesday, February 19, 2013 7:02:56 AM Sub

Re: Long running nodetool repair

It should not take that long. For my 200G node, it takes about an hour to calculate the Merkle tree and then data streaming. By the way, how do you know the repair is not done? If you run nodetool tpstats, it should give you the AntiEntropy session info, active/pending/completed etc. While ca

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Read the message you answered to, and help yourself ! Alain 2013/2/19 Anurag Gujral > > Unsubscribe me please. > Thanks > A > >

RE: Question on Cassandra Snapshot

Thank you Aaron. From: aa...@thelastpickle.com Subject: Re: Question on Cassandra Snapshot Date: Mon, 18 Feb 2013 06:37:34 +1300 To: user@cassandra.apache.org With incremental_backup turned OFF in Cassandra.yaml - Are all SSTables are under /data/TestKeySpace/ColumnFamily at all times?No. They a

Cassandra DC Meetup: Cassandra on flash storage

http://www.meetup.com/Cassandra-DC-Meetup/events/104345302/ This month we will have a presentation by our very own Matt Kennedy about running Cassandra on super fancy flash. If you are in the DC are we would love to see you stop by.

Cassandra network latency & tuning

I have a 5 node cluster and currently running ver 1.2. Prior to full scale deployment, I'm running some benchmarks  using YCSB. From a hadoop cluster deployment we saw an excellent improvement using higher speed networks. However Cassandra does not include network latencies and I would like to u

How to limit query results like "from row 50 to 100"

With CQL or an API.

Re: Hanging after OutOfMemory exception

Nice. Can you please raise a ticket at https://issues.apache.org/jira/browse/CASSANDRA an include the version you were using. Cheers - Aaron Morton Freelance Cassandra Developer New Zealand @aaronmorton http://www.thelastpickle.com On 19/02/2013, at 1:44 AM, "Desimpel, Ignac

Re: Mutation dropped

> Does the rpc_timeout not control the client timeout ? No it is how long a node will wait for a response from other nodes before raising a TimedOutException if less than CL nodes have responded. Set the client side socket timeout using your preferred client. > Is there any param which is confi