Network stress test. Post: 303027026

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Top Forums UNIX for Beginners Questions & Answers Network stress test. Post 303027026 by MuntyScrunt on Friday 7th of December 2018 07:51:36 AM

12-07-2018

Registered User

Network stress test.

Hi there.

First things first, this is nothing to do with the internet or ISP speed, I know what that is, I know what it's doing.

I have a cluster of 128 single board computers running a branch of Debian. I want to run some kind of stress test to ensure they can transfer data (a) to each other and (b) to NAS drives efficiently. These nodes are connected by stacked switches with fibre and lag trunks.

I've tried using the various 'tops available, but there's nothing that will give me (without a load of work) stats from each node point to point.

I could write some python and test the timing of file transfers, socket transfers etc, but I'll end up with a bunch of numbers without any reference.

Can anyone suggest a known 'top, software or service that can stress test the network and give me stats, bottlenecks and where there may be unused bandwidth?

The major caveat, this has to be free or very low cost.

Thanks folks.

MuntyScrunt

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LEARN ABOUT DEBIAN

rping

RPING(1)							     librdmacm								  RPING(1)

NAME

       rping - RDMA CM connection and RDMA ping-pong test.

SYNOPSIS

       rping -s [-v] [-V] [-d] [-P] [-a address] [-p port]
		 [-C message_count] [-S message_size]
       rping -c [-v] [-V] [-d] -a address [-p port]
		 [-C message_count] [-S message_size]

DESCRIPTION

       Establishes  a  reliable  RDMA connection between two nodes using the librdmacm, optionally performs RDMA transfers between the nodes, then
       disconnects.

OPTIONS

       -s     Run as the server.

       -c     Run as the client.

       -a address
	      On the server, specifies the network address to bind the connection to.  On the client, specifies the server address to connect to.

       -p     Port number for listening server.

       -v     Display ping data.

       -V     Validate ping data.

       -d     Display debug information.

       -C message_count
	      The number of messages to transfer over each connection.	(default infinite)

       -S message_size
	      The size of each message transferred, in bytes.  (default 100)

       -P     Run the server in persistent mode.  This allows multiple rping clients to connect to a single server instance. The server  will  run
	      until killed.

NOTES

       Because	this  test maps RDMA resources to userspace, users must ensure that they have available system resources and permissions.  See the
       libibverbs README file for additional details.

SEE ALSO

       rdma_cm(7), ucmatose(1), udaddy(1), mckey(1)

librdmacm							    2007-05-15								  RPING(1)