wizzackr

Ok, here are the latest findings. When running iperf3 on multiple threads and a fixed window size (iperf3 -c 192.168.0.139 -w 640k -l 640k -P 4) I get a combined throughput of 8.9 Gbits/s, which I deem ok, right?On a single thread it never goes beyond 2Gbits/s - which seems kinda odd? Copying files from within windows explorer from the NAS it tops out at bad 2Gbit/s - when copying TO it I reach 550MB/s, which is clearly where the disc performance limits any more throughput.If I am not mistaken the successful iperf test rules out the switch, the cables and the NIC/drivers, right?So it leaves me with the Synology NAS and windows or am I missing something.Any ideas??

I did run ntttcp tests and it shows pretty much the same result: I hit a cap at pretty much close to 2Gbit/s. I also checked Get-NetAdapterHardwareInfo to make sure I did not mess up the PCIe slot I put the NIC into, but the info there seems fine as well: Slot04 is where the NIC sits and it is reported as 5.0 GT/s with a PCIeLinkWidth of 8 (see attached) What is odd though is that I copied a test file from the NAS to the local SSD and it again capped at 2Gbit/s. When I copied it BACK to the NAS, however, it reached transfer speeds of 540MB/s - about what I would expect when writing to a six disc RAID10 array, right? In that case I can also cancel my new cable order, as the cables seem to work fine...? I also checked and re-installed the Intel network driver for the X540-T2 and disabled jumbo-frames on the NAS, switch and NICs to isolate the problem. Any other pointers?

Could it be the cables even though the switch reports the connection to be 10GbE?

a yeah, would also be willing to try the Intel cards, but that additional cash for essentially debugging is annoying me...

Thanks for the help, guys!! Re slots: Will try swapping the slot - they are currently in Slot 3. Man, that would be one hell of a drop in throughput for a x8 slot on CPU2, though? With regards to the "Virtual Machine Queues" I do not have any of those settings on the NICs. ...and man, I wish I had 2 GB/s going here

Hi guys, so here is the setup: There are ten workstations here (lenovo p700 with older dual 14core xeons, 64gb ram), each with a Sun Sual Port 10GbE PCIe 2.0 Adapter, Base-T (which we got for cheap on ebay). All the NICs have their drivers installed. All cabling is rated CAT7 (https://www.amazon.de/gp/product/B07W7TFN3C/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1), none of the cables is longer than 15m. The switch in use is the Netgear ProSafe XS716-T with 16 ports, all ports' LEDs show 10GbE connectivity with the exception of the 1GbE cable that comes from the router/DHCP. Now all fine and dandy BUT I cannot get any file to transfer across the network (tested from a NAS with 10 Exos X10s in RAID 10 to a local SSD) with speeds exceeding 2Gbit/s. ...kinda underwhelming and I am at a loss here with regards to what to check. I ran iPerf3 between four machines (2x two connections tested ) to check if the network or the discs were the culprit and it seems to be the network: All connections max out at around 2Gbit/s. I triple checkd the NIC settings and in the switch there really is not much to get wrong... or is there? Man, I am going nuts here, so any help is greatly appreciated, guys!

Just from looking at it for a sec this is great advice - the price difference is jarring!

That looks much better indeed. Noise is a big concern for us though, as this will be close to where the artists work. And man have I heard some noise from rackmounted units... Will try finding an alternative with RJ45 cabling...

ah, ok. Sorry for that - just wanted to make sure this is not some wonky shared ports stuff.

quick question: Those should be 8 port switches, or am I not getting seomthing? See here: https://geizhals.at/netgear-prosafe-xs500m-desktop-10g-switch-xs508m-100-a1685835.html

Thank you so much, guys. Looking into this right now...

Hi. We are planning to move our render clusters to a relatively cheap 10GBit network in order to alleviate some bottlenecks we are experiencing when sending off large render tasks to the clients (with 500GB of textures streaming to each client per frame). Basically we need to network ten clients to access one synology NAS (DS1817 with two 10GBASE-T-LAN-Ports) and are planning to buy these components to make it happen: Netgear ProSAFE XS500M Desktop 10G Switches One Intel X540-T2 10Gigabit 10GBe 10Gbit NIC per host machine (which we could get for 150 each) and each of those clusters will be attached to one Synology DS1817 NAS on the 10GBASE Port. Our goal is to move as closely as possible to the theoretical max read/write speeds of the Seagate Exos X X10 10TB drives (whioch should be in the 220 mb/s region) installed in those NASs. Now, before pulling the trigger on those parts I wanted to ask if there is any royal screw-up in my thinking... Any help is greatly appreciated! Cheers, J