Day: August 19, 2021

by

The 9th Annual MVAPICH User Group (MUG) conference

The 9th Annual MVAPICH User Group (MUG) conference will be held virtually with free registration from August 23-25, 2021. An exciting program has been put together with the following highlights:

  • Two Keynote Talks by Luiz DeRose from Oracle and Gilad Shainer from NVIDIA
  • Seven Tutorials/Demos (AWS, NVIDIA, Oracle, Rockport Networks, X-ScaleSolutions, and The Ohio State University)
  • 16 Invited Talks from many organizations (LLNL, INL, Broadcom, Rockport Networks, Microsoft Azure, AWS, Paratools and University of Oregon, CWRU, SDSC, TACC, KISTI, Konkuk University, UTK, Redhat, NSF, X-ScaleSolutions, and OSC)
  • 12 Short Presentations from the MVAPICH2 project members
  • A talk on the Future Roadmap of the MVAPICH2 Project
  • A special session on the newly funded NSF AI Institute – ICICLE (https://icicle.osu.edu/)

The detailed program is available from http://mug.mvapich.cse.ohio-state.edu/program/

All interested parties are welcome to attend the event free. The registration link is available from the following link: http://mug.mvapich.cse.ohio-state.edu/registration/

by

Session Trunking for NFS available in RHEL-8

This Article is taken from Is NFS session trunking available in RHEL?

Session trunking, whereby one can have multiple TCP connections to the same NFS server with the same IP address is provided by nconnect. This feature is available in RHEL 8

RHSA-2020:4431 for the package(s) kernel-4.18.0-240.el8 or later.
RHBA-2020:4530 for the package(s) nfs-utils-2.3.3-35.el8 libnfsidmap-2.3.3-35.el8 or later.

You can configure on the client side up to 16 connection

[root@nfs-client ~]# mount -t nfs 192.168.0.2:/nfs-share /nfs-share -o nosharecache,nconnect=16

You can see by using the command 

[root@nfs-client ~]# cat /proc/self/mountstats
......
......
RPC iostats version: 1.1  p/v: 100003/4 (nfs)
    xprt:   tcp 991 0 2 0 39 13 13 0 13 0 2 0 0
    xprt:   tcp 798 0 2 0 39 6 6 0 6 0 2 0 0
    xprt:   tcp 768 0 2 0 39 6 6 0 6 0 2 0 0
    xprt:   tcp 1013 0 2 0 39 4 4 0 4 0 2 0 0
    xprt:   tcp 828 0 2 0 39 4 4 0 4 0 2 0 0
    xprt:   tcp 702 0 2 0 39 2 2 0 2 0 2 0 0
    xprt:   tcp 783 0 2 0 39 2 2 0 2 0 2 0 0
    xprt:   tcp 858 0 2 0 39 2 2 0 2 0 2 0 0
.....

Someone recorded multiple performance increase when used on Pure Storage acting as a NFS Server. at Use nconnect to effortlessly increase NFS performance

Pix Taken from Use nconnect to effortlessly increase NFS performance

References:

  1. Is NFS session trunking available in RHEL?
  2. Use nconnect to effortlessly increase NFS performance
  3. Explanation of NFS mount options: nconnect=, nosharetransport, sharetransport=