Output from FailureDetector MBean changed in 2.1.10

Hello, We use the output from the AllEndpointStates attribute of the org.apache.cassandra.net:type=FailureDetector MBean via MX4J for basic monitoring/sanity checking. I've found that the output changed between 2.1.9 and 2.1.10; there is now additional info for some of the keys (DC, RELEASE_VERSIO

Re: Not able to cqlsh on 2.1.9 on Ubuntu 14.04

LISTEN 10169/java > > ### > > > Kindly let me know what else we can try .. it is really driving us nuttsss > :( > > On Mon, Sep 14, 2015 at 9:40 PM, Jared Biel > w

Re: Not able to cqlsh on 2.1.9 on Ubuntu 14.04

Whoops, I accidentally pressed a hotkey and sent my message prematurely. Here's what netstat should look like with those settings: sudo netstat -apn | grep 9042 tcp6 0 0 0.0.0.0:9042:::*LISTEN 21248/java -Jared On 14 September 2015 at 16:09,

Re: Not able to cqlsh on 2.1.9 on Ubuntu 14.04

I assume "@ Of node" is ethX's IP address? Has cassandra been restarted since changes were made to cassandra.yaml? The netstat output that you posted doesn't look right; we use settings similar to what you've posted. Here's what it looks like on one of our nodes. -Jared On 14 September 2015 at 1

Re: Cassandra leap second

Here is the full Datastax article: http://www.datastax.com/dev/blog/preparing-for-the-leap-second We had issues with C* and MySQL last time around (2012) but no issues this time thanks to upgraded systems. On 1 July 2015 at 14:39, Alain RODRIGUEZ wrote: > I think it is more a kernel / java vers

Re: EC2snitch in AWS

workTopologyStrategy', 'us-east' : 3 }; CREATE KEYSPACE ExampleKeyspace WITH REPLICATION = { 'class' : 'NetworkTopologyStrategy', 'us-west-2' : 3 }; Jared Biel | Bolder Thinking | 701-205-3153 | jared.b...@bolderthinking.com On 27 May 2015 at 16:31,

Re: Multi Datacenter / MultiRegion on AWS Best practice ?

If you decide to go the iptables route, you could try neti (blog post here .) On 27 October 2014 16:44, Juho Mäkinen wrote: > Hi! > > >> 2014-10-23 11:16 GMT+02:00 Alain ROD

Re: Looking for a cassandra web interface

Very nice, I had forgotten about Cyclop. We used to use Cassandra Cluster Admin, but it doesn't support CQL so it's not very useful anymore. If you're looking for a developer UI, I recommend trying DataStax DevCenter ( http://www.datastax.com/what-we-offer/products-services/devcenter). It's complet

Re: FileNotFoundException during reboot (Cassandra-2.1.1)

Maybe you're running out of file descriptors? On 29 September 2014 01:31, Jay Patel wrote: > Hey there, > > We've trying out Cassandra-2.1.1 and facing the below exception > frequently, mainly during the node reboot. File is there with proper > permissions (as below), not sure why C* is not able

Re: Experience with multihoming cassandra?

Doing this seems counter-productive to Cassandra's design/use-cases. It's best at home running on a large number of smaller servers rather than a small number of large servers. Also, as you said, you won't get any of the high availability benefits that it offers if you run multiple copies of Cassan

Re: Question about EC2 and SSDs

EBS performance was a major concern a few years ago, but it's gotten better in the last few years with things like Provisioned IOPS and SSDs. However, it's still not recommended (reasons outlined here

Re: abusing cassandra's multi DC abilities

Have you heard of this https://github.com/Comcast/cmb? Maybe it's along the path of what you're looking for. On 22 February 2014 22:33, Jonathan Haddad wrote: > Upfront TLDR: We want to do stuff (reindex documents, bust cache) when > changed data from DC1 shows up in DC2. > > Full Story: > We'r

Re: MUTATION messages dropped

I can't comment on your specific issue, but I don't know if running 2.0.0 in production is a good idea. At the very least I'd try upgrading to the latest 2.0.X (currently 2.0.3.) https://engineering.eventbrite.com/what-version-of-cassandra-should-i-run/ On 20 December 2013 06:08, Alexander Shuty

Re: mmaped files and swap

See http://en.wikipedia.org/wiki/Swappiness On 13 March 2013 19:56, Fredrik Stigbäck wrote: > Well, we've seen a Cassandra process swap out 500 MB on a Linux OS > with plenty of RAM, so I was just curious as why the OS thinks it > should use the swap at all. > > 2013/3/13 karim duran : > > I agr

Re: Cassandra with SAN

> As a counter argument though, anyone running a C* cluster on the Amazon cloud is going to be using SAN storage (or some kind of proprietary storage array) at the lowest layers...Amazon isn't going to have a bunch of JBOD running their cloud infrastructure. However, they've invested in the infra

Re: Nodetool doesn't shows two nodes

This is something that I found while using the multi-region snitch - it uses public IPs for communication. See the original ticket here: https://issues.apache.org/jira/browse/CASSANDRA-2452. It'd be nice if it used the private IPs to communicate with nodes that are in the same region as itself, but

Re: Cassandra at Amazon AWS

We use a replication factor such that if any one instance dies the cluster would remain alive. If a node dies, we simply replace it and move on. As far as disaster recovery, it's easy to store snapshots in S3, although glacier is looking interesting. Jared Biel System Administrator Bolder Thi

Re: Cassandra at Amazon AWS

We're currently using Cassandra on EC2 at very low scale (a 2 node cluster on m1.large instances in two regions.) I don't believe that EBS is recommended for performance reasons. Also, it's proven to be very unreliable in the past (most of the big/notable AWS outages were due to EBS issues.) We've