I had the exact same question, but I think this is what Nate was thinking:
If you're running multiple nodes on a single server, vnodes give you no
control over which instance has which key (whereas you can assign initial
tokens). Therefore you could have two of your three replicas on the same
@Sean - You can manually change the ports used by Datastax agent using the
address.yaml file in the agent install directory.
+1 on using racks to separate it out... but it will increase operational
complexity somewhat
On 26 May 2015 at 08:11, Nate McCall n...@thelastpickle.com wrote:
If
If you're running multiple nodes on a single server, vnodes give you no
control over which instance has which key (whereas you can assign initial
tokens). Therefore you could have two of your three replicas on the same
physical server which, if it goes down, you can't read or write at
If I have a 20-node cluster with 2 nodes on each physical server, can I
use 10 racks to properly segment my partitions?
Yes.
On Sun, May 24, 2015 at 5:38 PM, Jonathan Haddad j...@jonhaddad.com
wrote:
What impact would vnodes have on strong consistency? I think the problem
you're
What impact would vnodes have on strong consistency? I think the problem
you're describing exists with or without them.
On Sat, May 23, 2015 at 2:30 PM Nate McCall n...@thelastpickle.com wrote:
So my question is: suppose I take a 12 disk JBOD and run 2 Cassandra
nodes (each with 5 data
So my question is: suppose I take a 12 disk JBOD and run 2 Cassandra nodes
(each with 5 data disks, 1 commit log disk) and either give each its own
container IP or change the listen ports. Will this work? What are the
risks? Will/should Cassandra support this better in the future?
Don't
connect to one of
the rings. We haven’t tried two OpsCenter agent installs, yet.
Sean Durity
From: Jonathan Haddad [mailto:j...@jonhaddad.com]
Sent: Thursday, May 21, 2015 5:26 PM
To: user@cassandra.apache.org
Subject: Re: Multiple cassandra instances per physical node
Yep, that would be one way
Hi,
I also advice against multiple instances on the same hardware. If you have
really big boxes why not virtualize?
Other option is experiment with CCM. Although there are some limitations
with CCM (ex: JNA is disabled)
If you follow up on this I would to hear how it went.
Em 21/05/2015 19:33,
JBOD -- just a bunch of disks, no raid.
All the best,
[image: datastax_logo.png] http://www.datastax.com/
Sebastián Estévez
Solutions Architect | 954 905 8615 | sebastian.este...@datastax.com
[image: linkedin.png] https://www.linkedin.com/company/datastax [image:
facebook.png]
@James Rothering yeah I was thinking of container in a broad sense: either
full virtual machines, docker containers, straight LXC, or whatever else
would allow the Cassandra nodes to have their own IPs and bind to default
ports.
@Jonathan Haddad thanks for the blog post. To ensure the same host
You could use docker but it's not required. You could use LXC if you
wanted.
Shameless self promo:
http://rustyrazorblade.com/2013/08/advanced-devops-with-vagrant-and-lxc/
On Thu, May 21, 2015 at 1:00 PM James Rothering jrother...@codojo.me
wrote:
Hmmm ... Not familiar with JBOD. Is that
Hi,
we do operate multiple instances (of possibly different versions) of
Cassandra on rather thick nodes. The only problem we encountered so far was
sharing same physical data disk among multiple instances - it proved to not
be the best idea.Sharing of commitlog disks caused no troubles so far.
Hmmm ... Not familiar with JBOD. Is that just RAID-0?
Also ... wrt the container talk, is that a Docker container you're talking
about?
On Thu, May 21, 2015 at 12:48 PM, Jonathan Haddad j...@jonhaddad.com wrote:
If you run it in a container with dedicated IPs it'll work just fine.
Just be
Yep, that would be one way to handle it.
On Thu, May 21, 2015 at 2:07 PM Dan Kinder dkin...@turnitin.com wrote:
@James Rothering yeah I was thinking of container in a broad sense: either
full virtual machines, docker containers, straight LXC, or whatever else
would allow the Cassandra nodes
If you run it in a container with dedicated IPs it'll work just fine. Just
be sure you aren't using the same machine to replicate it's own data.
On Thu, May 21, 2015 at 12:43 PM Manoj Khangaonkar khangaon...@gmail.com
wrote:
+1.
I agree we need to be able to run multiple server instances on
+1.
I agree we need to be able to run multiple server instances on one physical
machine. This is especially necessary in development and test environments
where one is experimenting and needs a cluster, but do not have access to
multiple physical machines.
If you google , you can find a few
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