[Gluster-users] bonding question

[Ron Kelley]

Adding more physical interfaces to a bonded NIC won't get you more speed
for single-stream operations.  To get more performance out of your bonded
NIC, you need to run multiple instances of the "dd" command.

A snippet from a good reference article:
----------------------------------------------------------
Most administrators assume that bonding multiple network cards together
instantly results in double the bandwidth and high-availability in case a
link goes down. Unfortunately, this is not true.
----------------------------------------------------------

http://www.enterprisenetworkingplanet.com/linux_unix/article.php/3850636/Understanding-NIC-Bonding-with-Linux.htm



-Ron


On Mon, Sep 29, 2014 at 9:54 AM, Demeter Tibor <tdemeter at itsmart.hu> wrote:

>
> Hi,
>
> I made short tests with glusterfs and bonding, but I have performance
> issues.
>
> Environment:
>
> - bonding mode=4 (with switch support) or mode=6
> - centos7
> - vlans
> - two servers with 4 nic/node, one nic on the internet (this is the
> default route) and 3 nic as bonded interface
> - MTU 9000 on all interface (bondings, vlans, eths, etc), MTU 9216 on the
> switch ports
> - each host vlan-s can ping each host on the vlan subnets and on the non
> vlan subnets.
> - the volume uses the bonded vlans as bricks
>
> [root at node1 lock]# gluster vol info
>
> Volume Name: meta
> Type: Replicate
> Volume ID: f4d026e7-3edd-442f-9207-f0a849acebf5
> Status: Started
> Number of Bricks: 1 x 2 = 2
> Transport-type: tcp
> Bricks:
> Brick1: gs00.itsmart.cloud:/gluster/meta0
> Brick2: gs01.itsmart.cloud:/gluster/meta1
>
>
> I did this test:
>
> [root at node0 lock]# dd if=/dev/zero of=/mnt/lock/disk bs=1M count=1000
> conv=fdatasync
> 1000+0 records in
> 1000+0 records out
> 1048576000 bytes (1,0 GB) copied, 10,3035 s, 102 MB/s
>
>
> I compared with local hdd speed tests:
>
>
> [root at node0 lock]# dd if=/dev/zero of=/home/disk bs=1M count=1000
> conv=fdatasync
> 1000+0 records in
> 1000+0 records out
> 1048576000 bytes (1,0 GB) copied, 3,04411 s, 344 MB/s
>
>
> Ok, I mean this is a network based solution, but I think the 100MB/sec is
> possible with one nic too.
>
> I just wondering, maybe my bonding isn't working fine.
>
> What do you think, is it ok?
>
>
> The port utilization is minimal, there are two bigger traffic on two ports
> only.
>
>
> Thanks in advance.
>
>
>
> Tibor
>
>
>
>
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