Hi,
Has anyone had any experience with Intel Vroc[1]? I'm possibly having to deal with a new server with such technology and can't find much (real world) information about it. Looking at the specs it's basically a glorified fake raid which usually turns on my alarm bells. Has anyone done any testing, how does it compare with "real" raid or software raid?
Cheers, Lucian
[1] - https://www.intel.co.uk/content/www/uk/en/support/articles/000024498/memory-...
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Nux! www.nux.ro
On Tue, 23 Apr 2019 10:00:45 +0100 (BST) Nux! nux@li.nux.ro wrote:
Hi,
Has anyone had any experience with Intel Vroc[1]? I'm possibly having to deal with a new server with such technology and can't find much (real world) information about it. Looking at the specs it's basically a glorified fake raid which usually turns on my alarm bells. Has anyone done any testing, how does it compare with "real" raid or software raid?
Intel FAQ had the following nugget of info but I've yet to try it myself..
What is the difference between Intel® VROC and Linux* MD RAID? Intel® VROC for Linux* is built upon MD RAID, and the Intel VROC team has an MD RAID maintainer on the team. However, Intel VROC has the following extra features:
* Provides UEFI HII and UEFI Shell command line RAID management * Provides webpage-based, remote RAID management and RESTful APIs * Fully validated and supported with Purley platform and industry-select * SSDs Provides hotfix/patch to specific customer issue on supported OS
Seems a mess of licensing and enabling too :-(
Also seen this from HPE: http://www8.hp.com/h20195/v2/GetPDF.aspx/c05821090.pdf
And this from Intel: https://software.intel.com/en-us/articles/intel-xeon-processor-scalable-fami...
/Peter K
Hi,
Has anyone had any experience with Intel Vroc[1]? I'm possibly having to deal with a new server with such technology and can't find much (real world) information about it. Looking at the specs it's basically a glorified fake raid which usually turns on my alarm bells. Has anyone done any testing, how does it compare with "real" raid or software raid?
From their description: Intel® VROC for Linux* is built upon MD RAID...
So, it is Linux MD RAID with some management addons. I prefer to stay far away from such addons.
A nice feature is the LED management, but who needs it if you have proper monitoring and are not in the DC anyway?
I prefer standard U.2 NVMe SSDs connected via PCIE to the CPU. Works wonderfully on AMD EPYC so I expect the same on Intel also.
Just don't forget to adjust raid speed limits. I have
dev.raid.speed_limit_max = 10000000 dev.raid.speed_limit_min = 15000
to enjoy full sync speed.
Regards, Simon