perfSONAR User Q&A and Other Discussion

[장민석 <>]

Hi, ALL.

I'm sorry for confusing. Old TCP congestion algorithms would be installed after perfSONAR 5.1.0.b1 installed.

# cat /etc/rocky-release

Rocky Linux release 9.3 (Blue Onyx)

# curl -s https://raw.githubusercontent.com/perfsonar/project/installation-script/install-perfsonar | sh -s - --repo staging toolkit

# find /lib/modules | grep net/ipv4/tcp_

/lib/modules/5.14.0-162.12.1.el9_1.0.2.x86_64/kernel/net/ipv4/tcp_bbr.ko.xz

/lib/modules/5.14.0-162.12.1.el9_1.0.2.x86_64/kernel/net/ipv4/tcp_dctcp.ko.xz

/lib/modules/5.14.0-162.12.1.el9_1.0.2.x86_64/kernel/net/ipv4/tcp_nv.ko.xz

/lib/modules/5.14.0-362.24.1.el9_3.0.1.x86_64/kernel/net/ipv4/tcp_bbr.ko.xz

/lib/modules/5.14.0-362.24.1.el9_3.0.1.x86_64/kernel/net/ipv4/tcp_dctcp.ko.xz

/lib/modules/5.14.0-362.24.1.el9_3.0.1.x86_64/kernel/net/ipv4/tcp_nv.ko.xz

/lib/modules/5.14.0-362.24.1.el9_3.0.1.x86_64/kernel/net/ipv4/tcp_bic.ko.xz

/lib/modules/5.14.0-362.24.1.el9_3.0.1.x86_64/kernel/net/ipv4/tcp_htcp.ko.xz

/lib/modules/5.14.0-362.24.1.el9_3.0.1.x86_64/kernel/net/ipv4/tcp_westwood.ko.xz

# dnf whatprovides /lib/modules/5.14.0-362.24.1.el9_3.0.1.x86_64/kernel/net/ipv4/tcp_bic.ko.xz

Last metadata expiration check: 0:14:10 ago on Fri 19 Apr 2024 05:40:01 PM KST.

kernel-modules-extra-5.14.0-362.24.1.el9_3.0.1.x86_64 : Extra kernel modules to match the kernel

Repo        : @System

Matched from:

Filename    : /lib/modules/5.14.0-362.24.1.el9_3.0.1.x86_64/kernel/net/ipv4/tcp_bic.ko.xz

----- Original Message -----
From : Minseok Jang <>
To : <>
Sent : 2024-04-19 16:42:05
Subject : [perfsonar-user] Which OS do you prefer for perfSONAR 5.1.0.b1?Rocky 9 or Ubuntu 22?

Hi, ALL.

I am plan to upgrade (re-install) perfSONAR to 5.1.0.b1.

Which OS do you prefer for perfSONAR? Rocky 9 or Ubuntu 22?

Following the article[1], RedHat eliminates old TCP congestion algorithms on RHEL 9. RedHat eliminates most of them that are not used recently.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=2023003

I investigate what TCP congestion algorithms in each Linux Distros[2], and Rocky 9 has only 3 algorithms.

[2] https://wiki.kreonet.net/faster-data/tcp-congestion-control-of-linux-158171904.html

pscheduler can change congestion algorithm parameter. If OS not support old algorithms, some schedulers would be canceled.

$ pscheduler task throughput --congestion=CONGESTION ...

So, I would like to choose Ubuntu 22. What's your choice?

Best Regards.

Minseok Jang

---

Minseok Jang (張旻錫, 장민석)

KREONET Center / Division of Science and Technology Digital Convergence

Korea Institute of Science and Technology Information

Email:

LinkedIn: https://www.linkedin.com/in/msjang

Phone: +82-42-869-1292 / Mobile: +82-10-2630-7480