Re: RADOS Bench

[Somnath Roy <Somnath.Roy@xxxxxxxxxxx>]

No, you need to launch them manually… Here is my thought.

 

1. Say running 4 instances of rados clients from 4 different console you are getting 1100 MB/s as you said.

 

2. Now , say running 4 more instances from another client with 10 Gb, you are able to scale it more.

 

This means you are limited by single client BW, cluster is capable of giving more.

 

Thanks & Regards

Somnath

 

From: Garg, Pankaj [mailto:Pankaj.Garg@xxxxxxxxxxxxxxxxxx]
Sent: Monday, June 15, 2015 1:03 PM
To: Somnath Roy; ceph-users@xxxxxxxxxxxxxx
Subject: RE: RADOS Bench

 

Thanks Somnath. Do you mean that I should run Rados Bench in parallel on 2 different clients?

Is there a way to run Rados Bench from 2 clients, so that they run in parallel, except launching them together manually?

 

From: Somnath Roy [mailto:Somnath.Roy@xxxxxxxxxxx]
Sent: Monday, June 15, 2015 1:01 PM
To: Garg, Pankaj; ceph-users@xxxxxxxxxxxxxx
Subject: RE: RADOS Bench

 

Pankaj,

It is the cumulative BW of ceph cluster but you will be limited by your single client BW always.

To verify if you are single client 10Gb network limited or not, put another client and see if it is scaling or not.

 

Thanks & Regards

Somnath

 

From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Garg, Pankaj
Sent: Monday, June 15, 2015 12:55 PM
To: ceph-users@xxxxxxxxxxxxxx
Subject: RADOS Bench

 

Hi,

I have a few machines in my Ceph Cluster. I have another machine that I use to run RADOS Bench to get the performance.

I am now seeing numbers around 1100 MB/Sec, which is quite close to saturation point of the 10Gbps link.

 

I’d like to understand what does the total bandwidth number represent after I run the Rados bench test? Is this cumulative bandwidth of the Ceph Cluster or does it represent the

Bandwidth to the client machine?

 

I’d like to understand if I’m now being limited by my network.

 

Thanks

Pankaj

 

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