Re: Performance test on Ceph cluster

[Wido den Hollander <wido@widodh.nl>]

Hi,

On 03/07/2012 12:23 PM, Guido Winkelmann wrote:
> Am Freitag, 24. Februar 2012, 10:51:10 schrieb Tommi Virtanen:
>> On Fri, Feb 24, 2012 at 00:58, madhusudhana
>> <madhusudhana.u.acharya@gmail.com>  wrote:
>>> 4. If you don't mind, can you please give me a bit of insight on cluster
>>> network, what it is and how i can configure one for my ceph cluster ?
>>> Will there be a significant performance improvement with this ?
>>
>> When a client submits a write to Ceph, it needs to be replicated
>> (usually to two replicas). If all the ceph servers have two network
>> interfaces, and you have two separate networks you connect the servers
>> to, you can make the replication traffic go over the second interface,
>> and thus you'll have more available bandwidth between the cluster and
>> the clients in the first one.
>
> That sounds really interesting, any pointers on how that can be configured?

You should take a look at:

* public_addr
* cluster_addr
* public_network
* cluster_network

(From: src/common/config_opts.h)

[osd]
   cluster network = 192.168.0.0/16
   public network = 172.16.0.0/16

[osd.1]
   cluster addr = 192.168.0.1
   public addr = 172.16.0.1

I haven't played with those options, but that should do it (I think)

Wido

>
> As far as I can see, this is going to me I will have to assign to IP addresses
> to each node, one for internal traffic, one for external...
>
> Regards,
> 	Guido
> --
> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html