perfSONAR User Q&A and Other Discussion

[Sarah Larsen <>]

ESnet (Energy Sciences Network) is proud to announce the availability of iperf 3.12.  This release is primarily a bugfix and updates the included cJSON.  It also adds a few new features, such as debug levels and a send timeout option. More information can be found in the iperf-3.12 release notes, which are contained in the RELNOTES.md file in the distribution.

iperf 3.12 should be fully backward-compatible with prior iperf3 releases, that is, iperf 3.12 clients and servers should interoperate correctly with all 3.x clients and servers. iperf3 is a tool for measuring the maximum TCP, UDP, and SCTP throughput along a path, allowing for the tuning of various parameters and reporting measurements such as throughput, jitter, and datagram packet loss.  It is fully supported on Linux, FreeBSD, and macOS.  It may run on other platforms as well, although it has not received the same attention and testing.  Note that iperf3 is not compatible with, and will not interoperate with, version 2 or earlier of iperf, although the two versions can co-exist on the same hosts and networks.

The source code for iperf 3.12 is available at:

https://downloads.es.net/pub/iperf/iperf-3.12.tar.gz

SHA256 hash:

72034ecfb6a7d6d67e384e19fb6efff3236ca4f7ed4c518d7db649c447e1ffd6

iperf3 is freely-redistributable under a 3-clause BSD license.  More
information can be found in the LICENSE file inside the source
distribution.
Additional documentation for iperf3 can be found at:
https://software.es.net/iperf
More information about iperf3 (including the issue tracker, source
code repository access, and mailing list) can be found on the iperf3
page on GitHub at:
https://github.com/esnet/iperf
User questions can go to the iperf users list (which is more-or-less
shared between iperf2 and iperf3):

Mailing list information and archives can be found at:
https://lists.sourceforge.net/lists/listinfo/iperf-users
The mailing list for iperf3 development is:

To see the list archives or join the mailing list, visit:
http://groups.google.com/group/iperf-dev