[gpfsug-discuss] Anybody running GPFS over iSCSI? -

Jan-Frode Myklebust janfrode at tanso.net
Sun Dec 16 13:45:47 GMT 2018

I have been running GPFS over iSCSI, and know of customers who are also.
Probably not in the most demanding environments, but from my experience
iSCSI works perfectly fine as long as you have a stable network. Having a
dedicated (simple) storage network for iSCSI is probably a good idea (just
like for FC), otherwise iSCSI or GPFS is going to look bad when your
network admins cause problems on the shared network.

søn. 16. des. 2018 kl. 12:59 skrev Frank Kraemer <kraemerf at de.ibm.com>:

> Kevin,
> Ethernet networking of today is changing very fast as the driving forces
> are the "Hyperscale" datacenters. This big innovation is changing the world
> and is happening right now. You must understand the conversation by
> breaking down the differences between ASICs, FPGAs, and NPUs in modern
> Ethernet networking.
> 1) Mellanox has a very good answer here based on the Spectrum-2 chip
> http://www.mellanox.com/page/press_release_item?id=1933
> 2) Broadcom's answer to this is the 12.8 Tb/s StrataXGS Tomahawk 3
> Ethernet Switch Series
> https://www.broadcom.com/products/ethernet-connectivity/switching/strataxgs/bcm56980-series
> https://globenewswire.com/news-release/2018/10/24/1626188/0/en/Broadcom-Achieves-Mass-Production-on-Industry-Leading-12-8-Tbps-Tomahawk-3-Ethernet-Switch-Family.html
> 3) Barefoots Tofinio2 is another valid answer to this problem as it's
> programmable with the P4 language (important for Hyperscale Datacenters)
> https://www.barefootnetworks.com/
> The P4 language itself is open source. There’s details at p4.org, or you
> can download code at GitHub: https://github.com/p4lang/
> 4) The last newcomer to this party comes from Innovium named Teralynx
> https://innovium.com/products/teralynx/
> https://innovium.com/2018/03/20/innovium-releases-industrys-most-advanced-switch-software-platform-for-high-performance-data-center-networking-2-2-2-2-2-2/
> (Most of the new Cisco switches are powered by the Teralynx silicon, as
> Cisco seems to be late to this game with it's own development.)
> So back your question - iSCSI is not the future! NVMe and it's variants is
> the way to go and these new ethernet swichting products does have this in
> focus.
> Due to the performance demands of NVMe, high performance and low latency
> networking is required and Ethernet based RDMA — RoCE, RoCEv2 or iWARP are
> the leading choices.
> -frank-
> P.S. My Xmas wishlist to the IBM Spectrum Scale development team would be
> a "2019 HighSpeed Ethernet Networking optimization for Spectrum Scale" to
> make use of all these new things and options :-)
> Frank Kraemer
> IBM Consulting IT Specialist / Client Technical Architect
> Am Weiher 24, 65451 Kelsterbach, Germany
> mailto:kraemerf at de.ibm.com <kraemerf at de.ibm.com>
> Mobile +49171-3043699
> IBM Germany
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