[PVE-User] NFS Backups

[GM]

Have you tried to copy a large file directly from the host(s) to the nfs
server, how's the speed on that?

Have you checked if there's a bandwidth limit set for the backups in pve
datacenter options?

Try running a single, manual backup on a specific vm to the nfs server,
how's its speed compare to the scheduled backups?

On Wed, 20 Jul 2022 at 10:12, Сергей Цаболов <tsabolov at t8.ru> wrote:

> Hi, to all.
>
> In our PVE cluster have 5 hosts with ceph storage on all hosts disks.
>
> I setup backups to save on Synology with NFS storage.
>
> For 2-3 moths right now backups load very long time and not fast to
> finish backup from all hosts.
>
> If we change the MTU from default 1500 on Synology and on hosts to 9000
> MTU is possible to make it fast.
>
> Synology and the hosts connect to the Fiber Optic 10GB switch but the
> mtu on switch and on the hosts for now is default.
>
> If I ping to Synology from hosts :
>
> ping -s 9000 -d 192.168.8.23
> PING 192.168.8.23 (192.168.8.23) 9000(9028) bytes of data.
> 9008 bytes from 192.168.8.23: icmp_seq=1 ttl=63 time=1.03 ms
> 9008 bytes from 192.168.8.23: icmp_seq=2 ttl=63 time=0.223 ms
> 9008 bytes from 192.168.8.23: icmp_seq=3 ttl=63 time=0.229 ms
>
> I have the answer.
>
> When I test connection with between the hosts PVE connect :
>
> iperf3 -c 10.10.29.16
> Connecting to host 10.10.29.16, port 5201
> [  5] local 10.10.29.10 port 51502 connected to 10.10.29.16 port 5201
> [ ID] Interval           Transfer     Bitrate         Retr  Cwnd
> [  5]   0.00-1.00   sec  1.07 GBytes  9.19 Gbits/sec  1089    639 KBytes
> [  5]   1.00-2.00   sec  1.09 GBytes  9.38 Gbits/sec   52   1.17 MBytes
> [  5]   2.00-3.00   sec  1.09 GBytes  9.38 Gbits/sec    0   1.23 MBytes
> [  5]   3.00-4.00   sec  1.09 GBytes  9.37 Gbits/sec    0   1.27 MBytes
> [  5]   4.00-5.00   sec  1.07 GBytes  9.20 Gbits/sec  608    789 KBytes
> [  5]   5.00-6.00   sec  1.09 GBytes  9.38 Gbits/sec   45   1.09 MBytes
> [  5]   6.00-7.00   sec  1.09 GBytes  9.37 Gbits/sec    0   1.26 MBytes
> [  5]   7.00-8.00   sec  1.08 GBytes  9.28 Gbits/sec  411    872 KBytes
> [  5]   8.00-9.00   sec  1.09 GBytes  9.33 Gbits/sec  114   1.14 MBytes
> [  5]   9.00-10.00  sec  1.08 GBytes  9.30 Gbits/sec  321    676 KBytes
> - - - - - - - - - - - - - - - - - - - - - - - - -
> [ ID] Interval           Transfer     Bitrate         Retr
> [  5]   0.00-10.00  sec  10.8 GBytes  9.32 Gbits/sec 2640
> sender
> [  5]   0.00-10.00  sec  10.8 GBytes  9.31 Gbits/sec
> receiver
>
> But the speed to backup to NFS is very low.
>
> Can some one give me suggestion  how I can make faster the NFS backup on
> hosts (all hosts is now production).
>
> --
> Sergey TS
> The best Regard
>
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