233 karma · joined February 18, 2016
After we published our numbers, we found that it was not just ZFS, but other NAS vendors as well. People were sending us their experiences on non-ZFS systems. For example, Synology users were having issues and Synology took them off their compatible list. QNAP for its part is working on ZFS as we discuss in there as well.
On an Altra review. Great question. I have been bringing it up for some time and live 15 minutes from their headquarters. The invitation is open on our end.
Generally, that is why we prefer to publish "compiler optimized" as best-case performance as well as "GCC" as more of the least common denominator. Both sets of data points are important.
Official SPECint published numbers will not use GCC because the organizations that submit them always want to see the best performance. Ampere used a scaling factor off of published numbers.
If you want to see the impact, we have some numbers from my ThunderX2 review: https://www.servethehome.com/cavium-thunderx2-review-benchma...
You can see the impact clearly there even though that was from a few years ago. Cray has a better performing compiler for ThunderX2 but we did not get to use it due to licensing restrictions.
I hope that helps. The bigger need is for more data since this is one view of performance. There are other needs as well such as FP performance.
Still a lot more than some of the previous versions.
A dual 100GbE NIC requires a PCIe Gen4 x16 slot to run both ports at full speed. Mellanox ConnectX-6 200GbE cards require either 2x Gen4 or 1x Gen5 slot for full dual port bandwidth. Most of the larger NVMEoF nodes we are seeing are using more than one 100GbE NIC.
Enterprise SSDs will rapidly fill Gen4 x4 lanes later this year as we start to see them launch alongside more mainstream platforms. Four of those will fill a x16 slot.
GPUs and PCIe switches are also great examples of uses.
You are right that for the high-volume server segment, 160 PCIe lanes are overkill, as is even 128 today frankly. For some context, there is a huge portion of servers sold with less than 1 DIMM per RAM channel installed.
On the full drive part, a several hundred GB SSD will almost always nearly "empty" in practice for this application. That is why you see 8GB and 16GB RAM based solutions (e.g. the venerable ZeusRAM.)
Intel does provide us with hardware, as does AMD, Intel, Toshiba, Samsung, WDC, Cavium and etc. In fact, we have a full list of all relationships here: https://www.servethehome.com/about/editorial-copyright-polic...
Unlike virtually every other major review site (and a large number of bloggers), as of today we still do not have direct ad sales to any of these companies.
We also buy an absolute ton of gear for the DemoEval service we run which is why we have access to many different bits. For example, we have purchased a dozen Optane 900p's already since Intel would not furnish us with a U.2 drive.
Intel does not want to have the 900p eat into the P4800X which is a higher margin product. As a result, this is the kind of article (Optane 900p in servers) that Intel specifically would not want us to do. Since we buy hardware, we can.
We also have a few racks in Sunnyvale, California that we use APC metered by outlet PDUs for and that we actually calibrated by testing with the Extech units and found two of over a dozen that gave us consistent readings across PDUs and ports.
This unit is in a SC515 chassis with redundant PSUs. Even with 4x 7200 rpm Seagate 2.5" drives, a 64GB mSATA drive and a Samsung SM951 m.2 SSD it is still pulling 0.24A on 208V (so 0.48A on 208V). If you were to gain a bit of efficiency running a single PSU, you could easily fit these in 1A on 120V power envelope.
What we have seen several folks do with similar D-1540 machines is actually use 1U 1A/ 120V hosting (which is very inexpensive) to deliver cheap local PoPs for their applications. We have been strongly considering decommissioning our Las Vegas 1/2 cab DR site and moving to this sort of distributed model as there are a lot of benefits with this.
We published more complete benchmark results ( http://www.servethehome.com/intel-xeon-d-1587-benchmarks-16-... )of the D-1587 yesterday, expect more in terms of reviewing the overall platform next week. The Xeon D is very platform dependent for power and the particular unit we have does have the additional LSI/ Avago/ Broadcom SAS 2116 (16 port SAS2) HBA onboard.