[SOLVED] Not achieving 10Gbps migrations

S

showtime36

New Member
Jul 2, 2024
5
0
1
I have a simple proxmox setup with two hosts. These hosts are connected to a switch at 10Gbps and directly connected to each other at 10Gbps.

proxmox-topology.png

I have the migration settings set to use this directly connected network.

1719955660155.png

I am also able to achieve 10Gbps connectivity using iperf3.

Code: 
-----------------------------------------------------------
Server listening on 5201 (test #1)
-----------------------------------------------------------
Accepted connection from 172.31.255.2, port 47640
[  5] local 172.31.255.1 port 5201 connected to 172.31.255.2 port 47644
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec  1.15 GBytes  9.89 Gbits/sec                 
[  5]   1.00-2.00   sec  1.15 GBytes  9.90 Gbits/sec                 
[  5]   2.00-3.00   sec  1.15 GBytes  9.90 Gbits/sec                 
[  5]   3.00-4.00   sec  1.15 GBytes  9.90 Gbits/sec                 
[  5]   4.00-5.00   sec  1.15 GBytes  9.90 Gbits/sec                 
[  5]   5.00-6.00   sec  1.15 GBytes  9.90 Gbits/sec                 
[  5]   6.00-7.00   sec  1.15 GBytes  9.90 Gbits/sec                 
[  5]   7.00-8.00   sec  1.15 GBytes  9.90 Gbits/sec                 
[  5]   7.00-8.00   sec  1.15 GBytes  9.90 Gbits/sec                 
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-8.00   sec  9.61 GBytes  10.3 Gbits/sec                  receiver
iperf3: the client has terminated
-----------------------------------------------------------

However, when I perform a migration between hosts I get nowhere near 10Gbps speed. A VM that I would expect take maybe 2 minutes at most, takes over 6 minutes. Is there something I am doing wrong? I thought this was going to be more or less "plug and play". Any help is greatly appreciated.


Code: 
()
2024-07-02 16:07:58 use dedicated network address for sending migration traffic (172.31.255.2)
2024-07-02 16:07:58 starting migration of VM 110 to node 'sisko' (172.31.255.2)
2024-07-02 16:07:58 found local disk 'fast:vm-110-disk-0' (attached)
2024-07-02 16:07:58 starting VM 110 on remote node 'sisko'
2024-07-02 16:07:59 volume 'fast:vm-110-disk-0' is 'fast:vm-110-disk-0' on the target
2024-07-02 16:07:59 start remote tunnel
2024-07-02 16:08:00 ssh tunnel ver 1
2024-07-02 16:08:00 starting storage migration
2024-07-02 16:08:00 scsi0: start migration to nbd:unix:/run/qemu-server/110_nbd.migrate:exportname=drive-scsi0
drive mirror is starting for drive-scsi0
drive-scsi0: transferred 0.0 B of 25.0 GiB (0.00%) in 0s
drive-scsi0: transferred 47.0 MiB of 25.0 GiB (0.18%) in 1s
drive-scsi0: transferred 67.0 MiB of 25.0 GiB (0.26%) in 2s
drive-scsi0: transferred 89.0 MiB of 25.0 GiB (0.35%) in 3s
drive-scsi0: transferred 93.0 MiB of 25.0 GiB (0.36%) in 4s
drive-scsi0: transferred 149.0 MiB of 25.0 GiB (0.58%) in 5s
drive-scsi0: transferred 175.0 MiB of 25.0 GiB (0.68%) in 6s
drive-scsi0: transferred 184.0 MiB of 25.0 GiB (0.72%) in 7s
drive-scsi0: transferred 217.0 MiB of 25.0 GiB (0.85%) in 8s
drive-scsi0: transferred 229.0 MiB of 25.0 GiB (0.89%) in 9s
drive-scsi0: transferred 239.0 MiB of 25.0 GiB (0.93%) in 10s
drive-scsi0: transferred 257.0 MiB of 25.0 GiB (1.00%) in 11s
drive-scsi0: transferred 272.0 MiB of 25.0 GiB (1.06%) in 12s
OMITTED DUE TO CHARACTER LIMIT
drive-scsi0: transferred 16.2 GiB of 25.0 GiB (64.85%) in 4m 1s
drive-scsi0: transferred 16.3 GiB of 25.0 GiB (65.08%) in 4m 2s
drive-scsi0: transferred 16.3 GiB of 25.0 GiB (65.34%) in 4m 3s
drive-scsi0: transferred 16.4 GiB of 25.0 GiB (65.59%) in 4m 4s
drive-scsi0: transferred 16.5 GiB of 25.0 GiB (65.87%) in 4m 5s
drive-scsi0: transferred 16.5 GiB of 25.0 GiB (66.10%) in 4m 6s
drive-scsi0: transferred 16.6 GiB of 25.0 GiB (66.36%) in 4m 7s
drive-scsi0: transferred 16.6 GiB of 25.0 GiB (66.56%) in 4m 8s
drive-scsi0: transferred 16.7 GiB of 25.0 GiB (66.83%) in 4m 9s
drive-scsi0: transferred 16.8 GiB of 25.0 GiB (67.05%) in 4m 10s
drive-scsi0: transferred 16.8 GiB of 25.0 GiB (67.27%) in 4m 11s
drive-scsi0: transferred 16.9 GiB of 25.0 GiB (67.54%) in 4m 12s
drive-scsi0: transferred 16.9 GiB of 25.0 GiB (67.79%) in 4m 13s
drive-scsi0: transferred 17.0 GiB of 25.0 GiB (68.02%) in 4m 14s
drive-scsi0: transferred 17.1 GiB of 25.0 GiB (68.27%) in 4m 15s
drive-scsi0: transferred 17.1 GiB of 25.0 GiB (68.51%) in 4m 16s
drive-scsi0: transferred 17.2 GiB of 25.0 GiB (68.79%) in 4m 17s
drive-scsi0: transferred 17.3 GiB of 25.0 GiB (69.06%) in 4m 18s
drive-scsi0: transferred 17.3 GiB of 25.0 GiB (69.32%) in 4m 19s
drive-scsi0: transferred 17.4 GiB of 25.0 GiB (69.59%) in 4m 20s
drive-scsi0: transferred 17.5 GiB of 25.0 GiB (69.84%) in 4m 21s
drive-scsi0: transferred 17.5 GiB of 25.0 GiB (70.09%) in 4m 22s
drive-scsi0: transferred 17.6 GiB of 25.0 GiB (70.35%) in 4m 23s
drive-scsi0: transferred 17.7 GiB of 25.0 GiB (70.61%) in 4m 24s
drive-scsi0: transferred 17.7 GiB of 25.0 GiB (70.88%) in 4m 25s
drive-scsi0: transferred 17.8 GiB of 25.0 GiB (71.14%) in 4m 26s
drive-scsi0: transferred 17.9 GiB of 25.0 GiB (71.42%) in 4m 27s
drive-scsi0: transferred 17.9 GiB of 25.0 GiB (71.68%) in 4m 28s
drive-scsi0: transferred 18.0 GiB of 25.0 GiB (71.91%) in 4m 29s
drive-scsi0: transferred 18.0 GiB of 25.0 GiB (72.17%) in 4m 30s
drive-scsi0: transferred 18.1 GiB of 25.0 GiB (72.40%) in 4m 31s
drive-scsi0: transferred 18.2 GiB of 25.0 GiB (72.66%) in 4m 32s
drive-scsi0: transferred 18.2 GiB of 25.0 GiB (72.93%) in 4m 33s
drive-scsi0: transferred 18.3 GiB of 25.0 GiB (73.19%) in 4m 34s
drive-scsi0: transferred 18.4 GiB of 25.0 GiB (73.47%) in 4m 35s
drive-scsi0: transferred 18.4 GiB of 25.0 GiB (73.73%) in 4m 36s
drive-scsi0: transferred 18.5 GiB of 25.0 GiB (73.95%) in 4m 37s
drive-scsi0: transferred 18.5 GiB of 25.0 GiB (74.18%) in 4m 38s
drive-scsi0: transferred 18.6 GiB of 25.0 GiB (74.38%) in 4m 39s
drive-scsi0: transferred 18.6 GiB of 25.0 GiB (74.47%) in 4m 40s
drive-scsi0: transferred 18.6 GiB of 25.0 GiB (74.53%) in 4m 41s
drive-scsi0: transferred 18.8 GiB of 25.0 GiB (75.21%) in 4m 42s
drive-scsi0: transferred 18.9 GiB of 25.0 GiB (75.44%) in 4m 43s
drive-scsi0: transferred 18.9 GiB of 25.0 GiB (75.70%) in 4m 44s
drive-scsi0: transferred 19.0 GiB of 25.0 GiB (75.95%) in 4m 45s
drive-scsi0: transferred 19.0 GiB of 25.0 GiB (76.19%) in 4m 46s
drive-scsi0: transferred 19.1 GiB of 25.0 GiB (76.45%) in 4m 47s
drive-scsi0: transferred 19.2 GiB of 25.0 GiB (76.72%) in 4m 48s
drive-scsi0: transferred 19.2 GiB of 25.0 GiB (76.98%) in 4m 49s
drive-scsi0: transferred 19.3 GiB of 25.0 GiB (77.25%) in 4m 50s
drive-scsi0: transferred 19.4 GiB of 25.0 GiB (77.48%) in 4m 51s
drive-scsi0: transferred 19.4 GiB of 25.0 GiB (77.73%) in 4m 52s
drive-scsi0: transferred 19.5 GiB of 25.0 GiB (77.99%) in 4m 53s
drive-scsi0: transferred 19.6 GiB of 25.0 GiB (78.25%) in 4m 54s
drive-scsi0: transferred 19.6 GiB of 25.0 GiB (78.52%) in 4m 55s
drive-scsi0: transferred 19.7 GiB of 25.0 GiB (78.69%) in 4m 56s
drive-scsi0: transferred 19.7 GiB of 25.0 GiB (78.96%) in 4m 57s
drive-scsi0: transferred 19.8 GiB of 25.0 GiB (79.21%) in 4m 58s
drive-scsi0: transferred 19.9 GiB of 25.0 GiB (79.47%) in 4m 59s
drive-scsi0: transferred 19.9 GiB of 25.0 GiB (79.73%) in 5m
drive-scsi0: transferred 20.0 GiB of 25.0 GiB (79.98%) in 5m 1s
drive-scsi0: transferred 20.1 GiB of 25.0 GiB (80.22%) in 5m 2s
drive-scsi0: transferred 20.1 GiB of 25.0 GiB (80.47%) in 5m 3s
drive-scsi0: transferred 20.2 GiB of 25.0 GiB (80.71%) in 5m 4s
drive-scsi0: transferred 20.2 GiB of 25.0 GiB (80.96%) in 5m 5s
drive-scsi0: transferred 20.3 GiB of 25.0 GiB (81.23%) in 5m 6s
drive-scsi0: transferred 20.4 GiB of 25.0 GiB (81.47%) in 5m 7s
drive-scsi0: transferred 20.4 GiB of 25.0 GiB (81.76%) in 5m 8s
drive-scsi0: transferred 20.5 GiB of 25.0 GiB (81.99%) in 5m 9s
drive-scsi0: transferred 20.6 GiB of 25.0 GiB (82.26%) in 5m 10s
drive-scsi0: transferred 20.6 GiB of 25.0 GiB (82.44%) in 5m 11s
drive-scsi0: transferred 20.7 GiB of 25.0 GiB (82.71%) in 5m 12s
drive-scsi0: transferred 20.7 GiB of 25.0 GiB (82.99%) in 5m 13s
drive-scsi0: transferred 20.8 GiB of 25.0 GiB (83.24%) in 5m 14s
drive-scsi0: transferred 20.9 GiB of 25.0 GiB (83.51%) in 5m 15s
drive-scsi0: transferred 20.9 GiB of 25.0 GiB (83.77%) in 5m 16s
drive-scsi0: transferred 21.0 GiB of 25.0 GiB (84.02%) in 5m 17s
drive-scsi0: transferred 21.1 GiB of 25.0 GiB (84.27%) in 5m 18s
drive-scsi0: transferred 21.1 GiB of 25.0 GiB (84.54%) in 5m 19s
drive-scsi0: transferred 21.2 GiB of 25.0 GiB (84.80%) in 5m 20s
drive-scsi0: transferred 21.3 GiB of 25.0 GiB (85.04%) in 5m 21s
drive-scsi0: transferred 21.3 GiB of 25.0 GiB (85.29%) in 5m 22s
drive-scsi0: transferred 21.4 GiB of 25.0 GiB (85.57%) in 5m 23s
drive-scsi0: transferred 21.5 GiB of 25.0 GiB (85.83%) in 5m 24s
drive-scsi0: transferred 21.5 GiB of 25.0 GiB (86.10%) in 5m 25s
drive-scsi0: transferred 21.6 GiB of 25.0 GiB (86.36%) in 5m 26s
drive-scsi0: transferred 21.7 GiB of 25.0 GiB (86.60%) in 5m 27s
drive-scsi0: transferred 21.7 GiB of 25.0 GiB (86.86%) in 5m 28s
drive-scsi0: transferred 21.8 GiB of 25.0 GiB (87.11%) in 5m 29s
drive-scsi0: transferred 21.8 GiB of 25.0 GiB (87.29%) in 5m 30s
drive-scsi0: transferred 21.9 GiB of 25.0 GiB (87.53%) in 5m 31s
drive-scsi0: transferred 22.0 GiB of 25.0 GiB (87.80%) in 5m 32s
drive-scsi0: transferred 22.0 GiB of 25.0 GiB (88.06%) in 5m 33s
drive-scsi0: transferred 22.1 GiB of 25.0 GiB (88.32%) in 5m 35s
drive-scsi0: transferred 22.1 GiB of 25.0 GiB (88.55%) in 5m 36s
drive-scsi0: transferred 22.2 GiB of 25.0 GiB (88.82%) in 5m 37s
drive-scsi0: transferred 22.3 GiB of 25.0 GiB (89.08%) in 5m 38s
drive-scsi0: transferred 22.3 GiB of 25.0 GiB (89.31%) in 5m 39s
drive-scsi0: transferred 22.4 GiB of 25.0 GiB (89.56%) in 5m 40s
drive-scsi0: transferred 22.5 GiB of 25.0 GiB (89.84%) in 5m 41s
drive-scsi0: transferred 22.5 GiB of 25.0 GiB (90.09%) in 5m 42s
drive-scsi0: transferred 22.6 GiB of 25.0 GiB (90.35%) in 5m 43s
drive-scsi0: transferred 22.7 GiB of 25.0 GiB (90.61%) in 5m 44s
drive-scsi0: transferred 22.7 GiB of 25.0 GiB (90.87%) in 5m 45s
drive-scsi0: transferred 22.8 GiB of 25.0 GiB (91.13%) in 5m 46s
drive-scsi0: transferred 22.9 GiB of 25.0 GiB (91.40%) in 5m 47s
drive-scsi0: transferred 22.9 GiB of 25.0 GiB (91.64%) in 5m 48s
drive-scsi0: transferred 23.0 GiB of 25.0 GiB (91.89%) in 5m 49s
drive-scsi0: transferred 23.0 GiB of 25.0 GiB (92.16%) in 5m 50s
drive-scsi0: transferred 23.1 GiB of 25.0 GiB (92.40%) in 5m 51s
drive-scsi0: transferred 23.2 GiB of 25.0 GiB (92.65%) in 5m 52s
drive-scsi0: transferred 23.2 GiB of 25.0 GiB (92.90%) in 5m 53s
drive-scsi0: transferred 23.3 GiB of 25.0 GiB (93.15%) in 5m 54s
drive-scsi0: transferred 23.4 GiB of 25.0 GiB (93.41%) in 5m 55s
drive-scsi0: transferred 23.4 GiB of 25.0 GiB (93.65%) in 5m 56s
drive-scsi0: transferred 23.5 GiB of 25.0 GiB (93.92%) in 5m 57s
drive-scsi0: transferred 23.5 GiB of 25.0 GiB (94.18%) in 5m 58s
drive-scsi0: transferred 23.6 GiB of 25.0 GiB (94.41%) in 5m 59s
drive-scsi0: transferred 23.7 GiB of 25.0 GiB (94.66%) in 6m
drive-scsi0: transferred 23.7 GiB of 25.0 GiB (94.91%) in 6m 1s
drive-scsi0: transferred 23.8 GiB of 25.0 GiB (95.15%) in 6m 2s
drive-scsi0: transferred 23.9 GiB of 25.0 GiB (95.42%) in 6m 3s
drive-scsi0: transferred 23.9 GiB of 25.0 GiB (95.64%) in 6m 4s
drive-scsi0: transferred 24.0 GiB of 25.0 GiB (95.91%) in 6m 5s
drive-scsi0: transferred 24.0 GiB of 25.0 GiB (96.06%) in 6m 6s
drive-scsi0: transferred 24.0 GiB of 25.0 GiB (96.08%) in 6m 7s
drive-scsi0: transferred 24.0 GiB of 25.0 GiB (96.19%) in 6m 8s
drive-scsi0: transferred 24.5 GiB of 25.0 GiB (97.80%) in 6m 9s
drive-scsi0: transferred 24.7 GiB of 25.0 GiB (98.64%) in 6m 10s
drive-scsi0: transferred 25.0 GiB of 25.0 GiB (99.94%) in 6m 11s
drive-scsi0: transferred 25.0 GiB of 25.0 GiB (100.00%) in 6m 12s, ready
all 'mirror' jobs are ready
2024-07-02 16:14:12 starting online/live migration on unix:/run/qemu-server/110.migrate
2024-07-02 16:14:12 set migration capabilities
2024-07-02 16:14:12 migration downtime limit: 100 ms
2024-07-02 16:14:12 migration cachesize: 256.0 MiB
2024-07-02 16:14:12 set migration parameters
2024-07-02 16:14:12 start migrate command to unix:/run/qemu-server/110.migrate
2024-07-02 16:14:13 average migration speed: 2.0 GiB/s - downtime 44 ms
2024-07-02 16:14:13 migration status: completed
all 'mirror' jobs are ready
drive-scsi0: Completing block job_id...
drive-scsi0: Completed successfully.
drive-scsi0: mirror-job finished
2024-07-02 16:14:14 stopping NBD storage migration server on target.
  Logical volume "vm-110-disk-0" successfully removed.
2024-07-02 16:14:16 migration finished successfully (duration 00:06:18)
TASK OK
 
Hi,
for 25 GB, I recommend you spend time setting up background replication or a shared storage to never have to migrate fully that large of a VM.
Now if you must migrate 25 GB VM often, CPU speed and disk/io matters a lot. I would say NVME Gen 4 and CPU of +3 GHz + should get you there.

If file transfer is really important to push upper end, check performance between two Windows Server VMs, one on each Host and check file transfer speed from a Share on one Windows to the other, RDMA enabled.

https://learn.microsoft.com/en-us/windows-server/storage/file-server/smb-direct?tabs=disable
 
Also recommend avoid vmbr on the 172.* NIC and make it a direct static link point to point.
 
v95klima said:
Hi,
for 25 GB, I recommend you spend time setting up background replication or a shared storage to never have to migrate fully that large of a VM.
Now if you must migrate 25 GB VM often, CPU speed and disk/io matters a lot. I would say NVME Gen 4 and CPU of +3 GHz + should get you there.

If file transfer is really important to push upper end, check performance between two Windows Server VMs, one on each Host and check file transfer speed from a Share on one Windows to the other, RDMA enabled.

https://learn.microsoft.com/en-us/windows-server/storage/file-server/smb-direct?tabs=disable
Click to expand...

It's not that it'll have to happen often but when I do need to do it I expected it to be faster than what it is. For context, the two nodes run only NVMe storage and both have a i9-12900. There is no vmbr on the 172.X NIC, it is a static direct point to point. I did also set migration mode to insecure, I still do not see a speed increase.
 
try disconnecting 10.X physically on both hosts, and make sure the
"ip route" has the correct info to each host's 172.* nic and try again, to isolate issue?

If that does nothing, likely a setting issue in Proxmox CFG/coro sync?
Old Proxmox install with many test changes, incl. old High Availability / Cluster?
 
v95klima said:
try disconnecting 10.X physically on both hosts, and make sure the
"ip route" has the correct info to each host's 172.* nic and try again, to isolate issue?

If that does nothing, likely a setting issue in Proxmox CFG/coro sync?
Old Proxmox install with many test changes, incl. old High Availability / Cluster?
Click to expand...

Can confirm via "ip r" that the route is pointing to the right NIC

Code: 
root@prox01:~# ip r
default via 10.10.10.1 dev vmbr0 proto kernel onlink
10.10.10.0/24 dev vmbr0 proto kernel scope link src 10.10.10.110
172.31.255.0/30 dev enp2s0f1np1 proto kernel scope link src 172.31.255.1

Code: 
root@prox02:~# ip r
default via 10.10.10.1 dev vmbr0 proto kernel onlink
10.10.10.0/24 dev vmbr0 proto kernel scope link src 10.10.10.111
172.31.255.0/30 dev enp2s0f1np1 proto kernel scope link src 172.31.255.2

This is actually a brand new install as of yesterday.

Here's my corosync file, I don't think there is an issue here but what do you think?

Code: 
logging {
  debug: off
  to_syslog: yes
}

nodelist {
  node {
    name: prox01
    nodeid: 1
    quorum_votes: 1
    ring0_addr: 172.31.255.1
  }
  node {
    name: prox02
    nodeid: 2
    quorum_votes: 1
    ring0_addr: 172.31.255.2
  }
}

quorum {
  provider: corosync_votequorum
}

totem {
  cluster_name: uswi
  config_version: 4
  interface {
    linknumber: 0
  }
  ip_version: ipv4-6
  link_mode: passive
  secauth: on
  version: 2
}
 
I don't see anything strange on that file other than just two nodes with one vote each.
Do you have quorum?

If you really want clustering maybe try a second ring, to push the "sync chatter" to a different network than "Replication". I tried two rings a while back but it is very easy to break (warning, high probability of breaking) the Cluster and takes hours of work to repair and get all well again, especially if SSL certificates come out of sync, with broken link pointers, when rebuilding/reconnecting.

I disabled my cluster, found it consuming to much traffic and wearing out my expensive NVMEs, I now run Proxmox Hosts separately, not in cluster. Any service I want redundancy for, I run second instance on Host #2 on different port, for example Wireguard. So I can always remote in even if one Proxmox Host is off. Then I can use WOL to start the Host that is OFF. Low energy use and less wear.
So I gave up on mastering Clustering, and can't advise much deeper.

Hence my conclusion to avoid the cluster for home-lab. The only reason I see today for going back, in homelab, would full and instantaneous Firewall/Router redundancy per
https://www.youtube.com/@Jims-Garage
But I'm not there yet.
 
v95klima said:
I don't see anything strange on that file other than just two nodes with one vote each.
Do you have quorum?

If you really want clustering maybe try a second ring, to push the "sync chatter" to a different network than "Replication". I tried two rings a while back but it is very easy to break (warning, high probability of breaking) the Cluster and takes hours of work to repair and get all well again, especially if SSL certificates come out of sync, with broken link pointers, when rebuilding/reconnecting.

I disabled my cluster, found it consuming to much traffic and wearing out my expensive NVMEs, I now run Proxmox Hosts separately, not in cluster. Any service I want redundancy for, I run second instance on Host #2 on different port, for example Wireguard. So I can always remote in even if one Proxmox Host is off. Then I can use WOL to start the Host that is OFF. Low energy use and less wear.
So I gave up on mastering Clustering, and can't advise much deeper.

Hence my conclusion to avoid the cluster for home-lab. The only reason I see today for going back, in homelab, would full and instantaneous Firewall/Router redundancy per
https://www.youtube.com/@Jims-Garage
But I'm not there yet.
Click to expand...

Thank you for your guidance. You mentioning the quorum and replication took me down a couple rabbit holes.

1. I have another physical device I am using for backups, I've added that as a qdevice to the cluster so that there is a proper quorum now. I can lose a node or the backup server and things stay functioning.
2. As for the migration speed problem, this looks to be due to LVM. I changed one drive on each node to use ZFS, man did this speed up migrations. I can do the 25GB nodes in under a minute now (actually around 25 seconds). This is using the direct point to point network between the nodes (172.31.255.X).

Since I saw the speed increase with ZFS and this is a new build, I've reinstalled proxmox using only ZFS. So far my results are promising, I am still able to migrate machines in under a minute.

EDIT: I also did set migration: insecure in /etc/pve/datacenter.cfg before and after converting to ZFS, once coverting to ZFS speed had improved.
 
Last edited:
Good stuff, I switched my Proxmox OS drive from previously being ZFS back to EXT4, with doubling of speed as result when moving files. I still use many ZFS pools/data but for storage and back up only due to need for speed.
 
Last edited:
showtime36 said:
As for the migration speed problem, this looks to be due to LVM. I changed one drive on each node to use ZFS, man did this speed up migrations
Click to expand...
Have you tried migration settings type=insecure ?
by default migration is encrypted over ssh.
 
Last edited:
_gabriel said:
Have you tried migration settings type=insecure ?
by default migration is over encrypted ssh.
Click to expand...
I actually did this too prior to converting to LVM, there was no change. Now with ZFS I also have that set and things are running as I expect, I'm not sure of the performance with it set to secure since right after install and creating the cluster I set it to insecure.
 
indeed ssh encryption doesn't tax at all your high end consumer cpu.
don't forget, with ZFS, there is massive data write amplification, so datacenter drives is more than recommended.
TBW will go quickly.
 
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