LAG (20Gbe) Intel X550-T2 Performance issue

[a5ian300zx]

Hi All,

I have two Intel X550-T2 Intel Ethernet network cards RJ45 in LAG (20GBe) config but the performance seems quite slow compared to what it should be.

I have the following Hardware

Qnap (8 bay) - i7 / 16gb ram / Raid 5 / intel X550-T2 RJ45 (LAG) -> Unifi XG-6poe (10GBE) -> Windows 10 Pro PC with Intel X550-T2 (LAG) (i9 / 64gb ram / 1TB NVME )

When i transfer from PC to Qnap I get speeds of around 700 MB/s on average (files range from 2GB - 60GB each).

I have jumbo frames of 9000k on both side setup and latest intel drivers installed.

Has anyone experienced issues like this?

What else can i check or change?

 

[LodeRunner]

The single stream speed of a LAG will never exceed the speed of a single interface in the LAG. If you're expecting to get 20Gb/s throughput for a single file transfer stream, you're going to be disappointed.

If there is an iperf client for Qnap, you could see if it has multi-threaded/Parallel mode and test between the NAS and workstation and see if you're exceeding 10 Gb/s aggregate.

 

[LodeRunner]

I should also ask: what drives do you have in the Qnap in Raid 5? I'm curious what the Qnap is actually capable of.

 

[a5ian300zx]

I should also ask: what drives do you have in the Qnap in Raid 5? I'm curious what the Qnap is actually capable of.

I changed the connection and removed lag and just have a single 10gb connection now. Keep it simple.

I have used qnaps for over 10 years now and seem solid but I always buy the SMB/enterprise version and not the cheaper on.

I have the TVS-871 and have changed the fans to noctua ones so it is quieter.

The drives I have in mine are
HGST HUH721010ALE600 10TB 256MB SATA 512E ISE

In my nephew's qnap in Raid 5
I installed WD Gold 10TB

Even though HGST is own by WD the warranty any process is different the WD drives provide advanced placements while the HGST you have to return the drive first (and meet their packaging requirements) and wait.

 

[LodeRunner]

An array of those drives could theoretically hit 1 GByte/sec read sequential, with enough spindles. Spec for the HUH721010ALE600 says 249 Mbyte/s max. So you'd need at least 5 in your RAID-5 set to have a chance of actually hitting 1 GByte/s or ~8 Gbit/s throughput. But being spinners instead of SSD, anything other than sequential read/write is going to not be able to saturate single 10 Gbit, even with all 8 bays full. If any other reads or writes happen during your sequential transfer, the throughput would plummet.