Slow network speeds

  • Hi Guys,
    First let me list down the HW components that I’m using.


    OLD Server (Still in use)
    HP NL40 with 8gig ram
    4x2Tb WD Green Drives
    80Gb System Drive
    Onboard NIC


    New Server
    Gigabyte 890gpa-ud3h rev1
    AMD Phenom II x4 945
    8 Gigs of RAM
    60Gb SSD for system HDD
    5x3Tb Seagate NAS disk
    Onboard NIC


    Network
    Tp-Link TD-w9980 VDSL2+ Modem
    Tp-Link TL-SG1008D 8 Port 10/100/1000 Gigabit Switch


    My problem is network file transfer is too slow. I can’t pass 60 Mbit/s OMV Server (old) to OMV server (new) file transfer is around 7mb/s (using SMB)OMV Server (doesn’t matter) to desktop pc (win 8.1 &wired Gigabit connection) is around 13mb/s You can see the network load screenshot below and some diags that I ran.



    Code
    root@omv2:~# ethtool -i eth0
    driver: r8169version: 2.3LK-NAPI
    firmware-version: rtl_nic/rtl8168d-2.fw
    bus-info: 0000:03:00.0
    supports-statistics: yes
    supports-test: no
    supports-eeprom-access: no
    supports-register-dump: yes
    supports-priv-flags: no


    Code
    root@omv2:~# hdparm -I /dev/sda | grep -i speed 
    * Gen1 signaling speed (1.5Gb/s) 
    * Gen2 signaling speed (3.0Gb/s)  
    * Gen3 signaling speed (6.0Gb/s)


    Code
    root@omv2:~# df -h
    Filesystem                                              Size  Used Avail Use% Mounted on
    rootfs                                                   53G  5.5G   45G  11% /
    udev                                                     10M     0   10M   0% /dev
    tmpfs                                                   801M  4.1M  796M   1% /run/dev/disk/by-uuid/6ee07ffd-f8dd-4732-a977-a385cd6a8278   53G  5.5G   45G  11% /
    tmpfs                                                   5.0M     0  5.0M   0% /run/lock
    tmpfs                                                   2.1G  4.0K  2.1G   1% /run/shm
    tmpfs                                                   4.0G  3.0M  4.0G   1% /tmp
    /dev/md0                                                 11T  2.4T  8.5T  22% /media/5b52ee0e-c41d-4b9a-aa0f-b7e84c9ca46f
    /dev/md0                                                 11T  2.4T  8.5T  22% /export/omv2


    Code
    root@omv2:~# cat /proc/mdstat
    Personalities : [raid6] [raid5] [raid4]
    md0 : active raid5 sdb[0] sdf[4] sde[3] sdd[2] sdc[1]
    11720540160 blocks super 1.2 level 5, 512k chunk, algorithm 2 [5/5] [UUUUU]
    unused devices: <none>


    Code
    root@omv2:~# hdparm -Tt /dev/md0
    /dev/md0:
    Timing cached reads:   5982 MB in  2.00 seconds = 2991.59 MB/sec
    Timing buffered disk reads: 1658 MB in  3.00 seconds = 552.23 MB/sec
  • How did you connect the 2 Servres ? Over the bridge on the Gigabit Switch ?
    When I connect my NAS to my Service Network - I get around 150Mbps ... When I connect it to my workstation over the Bridge-Chip, I get around 850Mbps. Here - the firewall in the router is the culprint.
    I have also seen, that using rsync over the rsync daemon running on my old NAS - limited the network speed to about 280Mbps. Doing the rsync call on a NFS Mounted FS gave me around 540Mbps.
    The old NAS's CPU (Atom 1.6GHz) was the culprit here.


    I have however also fine-tuned the network interfaces a bit. Check google for details.

  • Two servers are not bridged they are just working as standalone systems. I'm not using rsync or etc right now. When I shut down the old server and transfer file from the new one to desktop max dl rate I can see is 13mb/s.

  • With the "bridged" I mean where they connected through the Switch Bridged interface ? That's the fastest connection.


    OK - if both systems are Linux, check out iperf: https://iperf.fr/
    This will show you the raw-speed you can achieve over the network...
    If the network shows 13Mbps, then you need to fix the network... If it shows more, then you need to fix the servers ;)

    Linux user since 1992 ...

    2 Mal editiert, zuletzt von Smurphy ()

Jetzt mitmachen!

Sie haben noch kein Benutzerkonto auf unserer Seite? Registrieren Sie sich kostenlos und nehmen Sie an unserer Community teil!