Ah ok, so it looks like there's a bit of overhead in getting the packets routed in the other direction. Not too bad I guess considering it's still pretty fast. I wonder if any adjustments can be made to make it just as fast. Once I get my third node, I'll be testing this to see what mine does. Right now I only have two nodes. I get the full 26Gb speeds but I do get some small amount of retries when I do iperf3 tests. I get about 5-25 retries but it's still getting the full 26Gb speeds. I tried two different cables and it didn't have any effect on it - one of those being the OWC cable thats supposed to be one of the best ones you can get.
Intel Nuc 13 Pro Thunderbolt Ring Network Ceph Cluster
- Thread starter l-koeln
- Start date
Thanks for running that test Rene. I don't know what the issue with mine is but at least I know what the routing performance could/should be.
Have you managed to figure out something?Thanks for running that test Rene. I don't know what the issue with mine is but at least I know what the routing performance could/should be.
I did not figure out what the FRR routing performance issue was with a simulated failure of a direct connection, and got tired of it all and wiped my nodes and started fresh.
For what it's worth and unrelated to that routing issue - I was running Kingston SEDC600M/960G SATA SSDs as the CEPH drives and 980 Pro NVMe 1TB as boot drives.
This is what I was getting over Thunderbolt and those Kingston enterprise SATA SSDs. I didn't make any modifications to cache which could have probably been done since they have PLP.
Code:
rados bench -p ceph-vm 120 write -b 4M -t 16 --run-name pve02 --no-cleanup
Total time run: 120.017
Total writes made: 13831
Write size: 4194304
Object size: 4194304
Bandwidth (MB/sec): 460.969 (Kingston advertises 530MB/s)
Stddev Bandwidth: 40.2623
Max bandwidth (MB/sec): 512
Min bandwidth (MB/sec): 316
Average IOPS: 115 (?!?Not even close to the advertised tens of thousands of IOPS)
Stddev IOPS: 10.0656
Max IOPS: 128
Min IOPS: 79
Average Latency(s): 0.138835
Stddev Latency(s): 0.0341182
Max latency(s): 0.588993
Min latency(s): 0.0137876Since wiping, I reversed it, and now the SATA SSDs are the boot drives. I was going to set it all up again and rerun tests.
BUT I suffer from analysis paralysis. Debating doing CEPH at all. Debating using FRR and Thunderbolt. Debating ditching IPv6 and just a simple OSPF FRR implementation. Debating pinning PVE kernel to a lower version and virtualizing my iGPU's with SRIOV. Debating burning it all down to the ground and just enjoying the summer.
I'm also waiting to see how Jim's Garage gets on with his YouTube MS-01 and Thunderbolt implementation.
You tested with a blocksize of 4M so the iops are okay with that huge bs.
Try it again with 4K
I think i know what the issues is, what is the MTU size that you have set for the en05 en06 interfaces? I only see these abysmal forwarding speeds when my interface MTU is at 1500 if the MTU is set at 65520 i get normal speeds.
I believe I had it set to 1500 when I got the bad result so it sounds like you're onto something. I did not perform the failure test when I had 65520 set for comparison.
I was initially using 65520 but since I didn't notice any measurable performance gains, and higher retransmits, I reverted to the standard 1500.
I see quite a big difference in the ceph write performance with MTU65520 i get around (600Mb/s) vs over 1GB/s on MTU 1500. But in case of failure the cluster is basically unsusable since forwarding speed is so low ceph will basically just lock up.
Also im on the latest kernel so that might be related, as this kernel is a bit worse with higher MTU setting as i wrote previous post.
Have you found a reliable method to run the affinity changing script by any chance? I tried the if-up.d method and it seems hit and miss so far.
I have it there for the affinity, havent had any issues with it since i set it up. Ceph performace is always roud 1Gb/s write and 2Gb/s read. Been solid for a while now.
I finally got around to working on the pve cluster and testing out MTU size.
For whatever reason I can't get top bandwidth when using MTU 65520, but the routing performance is great. MTU 1500 gives me top bandwidth but abysmal routing.
Code:
root@pve03:~# iperf3 -c 10.0.0.81
Connecting to host 10.0.0.81, port 5201
[ 5] local 10.0.0.83 port 55860 connected to 10.0.0.81 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 2.76 GBytes 23.7 Gbits/sec 93 1.29 MBytes
[ 5] 1.00-2.00 sec 2.90 GBytes 24.9 Gbits/sec 450 1.21 MBytes
[ 5] 2.00-3.00 sec 2.83 GBytes 24.3 Gbits/sec 495 1.51 MBytes
[ 5] 3.00-4.00 sec 2.85 GBytes 24.5 Gbits/sec 540 1.38 MBytes
[ 5] 4.00-5.00 sec 2.82 GBytes 24.3 Gbits/sec 271 1.17 MBytes
[ 5] 5.00-6.00 sec 2.82 GBytes 24.2 Gbits/sec 182 1.27 MBytes
[ 5] 6.00-7.00 sec 2.85 GBytes 24.5 Gbits/sec 315 1.47 MBytes
[ 5] 7.00-8.00 sec 2.84 GBytes 24.4 Gbits/sec 585 1.42 MBytes
[ 5] 8.00-9.00 sec 2.85 GBytes 24.5 Gbits/sec 363 1.12 MBytes
[ 5] 9.00-10.00 sec 2.84 GBytes 24.4 Gbits/sec 360 1.26 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 28.4 GBytes 24.4 Gbits/sec 3654 sender
[ 5] 0.00-10.00 sec 28.4 GBytes 24.4 Gbits/sec receiver
Code:
root@pve03:~# iperf3 -c 10.0.0.81
Connecting to host 10.0.0.81, port 5201
[ 5] local 10.0.0.83 port 52084 connected to 10.0.0.81 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 488 KBytes 4.00 Mbits/sec 38 2.83 KBytes
[ 5] 1.00-2.00 sec 950 KBytes 7.78 Mbits/sec 40 2.83 KBytes
[ 5] 2.00-3.00 sec 158 KBytes 1.30 Mbits/sec 26 5.66 KBytes
[ 5] 3.00-4.00 sec 160 KBytes 1.31 Mbits/sec 28 2.83 KBytes
[ 5] 4.00-5.00 sec 164 KBytes 1.34 Mbits/sec 26 4.24 KBytes
[ 5] 5.00-6.00 sec 236 KBytes 1.93 Mbits/sec 28 2.83 KBytes
[ 5] 6.00-7.00 sec 161 KBytes 1.32 Mbits/sec 26 7.07 KBytes
[ 5] 7.00-8.00 sec 163 KBytes 1.33 Mbits/sec 28 2.83 KBytes
[ 5] 8.00-9.00 sec 80.6 KBytes 660 Kbits/sec 26 2.83 KBytes
[ 5] 9.00-10.00 sec 478 KBytes 3.92 Mbits/sec 36 2.83 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 2.97 MBytes 2.49 Mbits/sec 302 sender
[ 5] 0.00-10.00 sec 2.91 MBytes 2.44 Mbits/sec receiver
Code:
root@pve03:~# iperf3 -c 10.0.0.81
Connecting to host 10.0.0.81, port 5201
[ 5] local 10.0.0.83 port 47986 connected to 10.0.0.81 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 2.16 GBytes 18.6 Gbits/sec 519 3.18 MBytes
[ 5] 1.00-2.00 sec 1.62 GBytes 13.9 Gbits/sec 395 1.50 MBytes
[ 5] 2.00-3.00 sec 999 MBytes 8.38 Gbits/sec 329 1.62 MBytes
[ 5] 3.00-4.00 sec 1.54 GBytes 13.3 Gbits/sec 573 1.69 MBytes
[ 5] 4.00-5.00 sec 1.74 GBytes 14.9 Gbits/sec 451 1.75 MBytes
[ 5] 5.00-6.00 sec 1.93 GBytes 16.5 Gbits/sec 457 1.62 MBytes
[ 5] 6.00-7.00 sec 2.67 GBytes 23.0 Gbits/sec 724 2.31 MBytes
[ 5] 7.00-8.00 sec 2.29 GBytes 19.6 Gbits/sec 674 1.19 MBytes
[ 5] 8.00-9.00 sec 1.99 GBytes 17.1 Gbits/sec 468 1.62 MBytes
[ 5] 9.00-10.00 sec 2.71 GBytes 23.2 Gbits/sec 663 1.69 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 19.6 GBytes 16.9 Gbits/sec 5253 sender
[ 5] 0.00-10.00 sec 19.6 GBytes 16.8 Gbits/sec receiver
iperf Done.
root@pve03:~# ip route
default via 192.168.10.1 dev vmbr0 proto kernel onlink
10.0.0.81 nhid 18 via 10.0.0.81 dev en06 proto openfabric metric 20 onlink
10.0.0.82 nhid 16 via 10.0.0.82 dev en05 proto openfabric metric 20 onlink
172.16.1.0/24 dev vmbr1 proto kernel scope link src 172.16.1.13
192.168.10.0/24 dev vmbr0 proto kernel scope link src 192.168.10.13
Code:
root@pve03:~# iperf3 -c 10.0.0.81
Connecting to host 10.0.0.81, port 5201
[ 5] local 10.0.0.83 port 50444 connected to 10.0.0.81 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 2.10 GBytes 18.0 Gbits/sec 112 2.25 MBytes
[ 5] 1.00-2.00 sec 2.11 GBytes 18.1 Gbits/sec 126 1.75 MBytes
[ 5] 2.00-3.00 sec 2.12 GBytes 18.2 Gbits/sec 145 2.12 MBytes
[ 5] 3.00-4.00 sec 2.10 GBytes 18.0 Gbits/sec 113 2.19 MBytes
[ 5] 4.00-5.00 sec 1.65 GBytes 14.2 Gbits/sec 124 2.06 MBytes
[ 5] 5.00-6.00 sec 1.67 GBytes 14.3 Gbits/sec 103 1.50 MBytes
[ 5] 6.00-7.00 sec 1.65 GBytes 14.2 Gbits/sec 102 2.87 MBytes
[ 5] 7.00-8.00 sec 1.61 GBytes 13.8 Gbits/sec 86 2.81 MBytes
[ 5] 8.00-9.00 sec 1.25 GBytes 10.7 Gbits/sec 84 2.06 MBytes
[ 5] 9.00-10.00 sec 1.73 GBytes 14.9 Gbits/sec 105 3.00 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 18.0 GBytes 15.4 Gbits/sec 1100 sender
[ 5] 0.00-10.00 sec 18.0 GBytes 15.4 Gbits/sec receiver
iperf Done.
root@pve03:~# ip route
default via 192.168.10.1 dev vmbr0 proto kernel onlink
10.0.0.81 nhid 34 via 10.0.0.82 dev en05 proto openfabric metric 20 onlink
10.0.0.82 nhid 34 via 10.0.0.82 dev en05 proto openfabric metric 20 onlink
172.16.1.0/24 dev vmbr1 proto kernel scope link src 172.16.1.13
192.168.10.0/24 dev vmbr0 proto kernel scope link src 192.168.10.13