Networking Transfer issue - NFS Speed is to low

skilet

Cadet
Joined
Nov 5, 2019
Messages
4
Hi every one!! i'm new in the forum and in freenas system.
Primarily sorry for my english level, i'm wrong in the tenses and verbs yet.. jeje


My infraestructure compose with various server with vmware and one server on freenas.


Hardware and Software Caracteristics in freenas server:

Intel Xeon D-1521
16GB Memory
4TB x4 Total Volume 12TB
Network 1Gbps Public IP (Not Local)
Approx 500 mbps Transfer rate download and upload

OS VERSION: FreeNAS-11.2-U5


The transfer rate approximate was in 6 or 8 mbps constantly from vmware server to freenas server with this transfer i need 20 days for complete all backup's, i'm use NFS Share.

How can I verify where the problem is?
 

HoneyBadger

actually does care
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VMware will default all writes to NFS as synchronous - this will be slow if you do not have an SLOG device or other means of quickly servicing them. Hard drives are notoriously poor at handling this type of traffic.

Please see the thread here for details:


If speed is of utmost importance and an SLOG cannot be afforded, you can consider the possibility of setting sync=disabled on the backup dataset only to speed things up. Do not set this on the entire pool or on any dataset hosting running VMs.

You may also want to post the ifconfig output and run some iperf tests to rule out problems at the lower networking layers (eg: physical)
 
Last edited:

skilet

Cadet
Joined
Nov 5, 2019
Messages
4
Paste the full output of ifconfig within code tags.


Hi, here is

Code:
ix0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=e407bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether ac:1f:6b:61:c9:xx
        hwaddr ac:1f:6b:61:c9:xx
        inet xx.xx.xx.xxx netmask 0xffffff00 broadcast xx.xx.xx.xxx
        nd6 options=9<PERFORMNUD,IFDISABLED>
        media: Ethernet autoselect (10Gbase-T <full-duplex>)
        status: active
ix1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=e407bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether ac:1f:6b:61:c9:xx
        hwaddr ac:1f:6b:61:c9:xx
        inet 0.0.0.0 netmask 0xff000000 broadcast xx.xx.xx.xxx
        nd6 options=9<PERFORMNUD,IFDISABLED>
        media: Ethernet autoselect (10Gbase-T <full-duplex>)
        status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
        inet 127.0.0.1 netmask 0xff000000
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
        groups: lo
 

skilet

Cadet
Joined
Nov 5, 2019
Messages
4
VMware will default all writes to NFS as synchronous - this will be slow if you do not have an SLOG device or other means of quickly servicing them. Hard drives are notoriously poor at handling this type of traffic.

Please see the thread here for details:


If speed is of utmost importance and an SLOG cannot be afforded, you can consider the possibility of setting sync=disabled on the backup dataset only to speed things up. Do not set this on the entire pool or on any dataset hosting running VMs.

You may also want to post the ifconfig output and run some iperf tests to rule out problems at the lower networking layers (eg: physical)

previously the speed was 50mbps or 60mbps or more.

past month i'm only reboot the server and changes permision on nas folders.

i didn't someting else in the server.

i find the problem today when i look in the folder backup i see the backup was not finished yet.
 

HoneyBadger

actually does care
Administrator
Moderator
iXsystems
Joined
Feb 6, 2014
Messages
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I would check your cables and ensure that they have not been damaged or degraded in some way - the ifconfig and iperf testing may help sort that.

In addition, can you show your pool capacity and utilization? Pools that are fuller can have lower write speeds, often significantly if they are very full.
 

skilet

Cadet
Joined
Nov 5, 2019
Messages
4
some line comands for review network speed?
 

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