Re: Apple Link Aggrigation Band width
Re: Apple Link Aggrigation Band width
- Subject: Re: Apple Link Aggrigation Band width
- From: AgentM <email@hidden>
- Date: Tue, 28 Nov 2006 11:30:35 -0500
On Nov 28, 2006, at 11:13 , Anees Alappat wrote:
Hi,
I am using one Apple Power G5 machines with MAC OS X 10.4
and one Intel pro with MAC OS X 10.4,each with two, 1Gbps network
cards. I tried apple's Link Aggregation for creating a new virtual
interface bond0. These machines are connected using 2 cross cables
(CAT 6). But when i send a 50 GB data (single file) across the
machines using ftp, i didnot find any impovement in speed than
sending across a single network interface.
One thing i observerd is that the data rate is not going above 53MB/
s.This is less than half of the capacity of a single network
interface.And the cpu usage is less than 10%,memory is utilizing
fully(1GB). I feel the meaning of link aggregation comes only when
data pumbing from stack is more than ~120MB?(ie, more than a
single links capacity).
I would like to know, how can we increase data pumbing from stack
to layer2.Is there any bench marking application available for
demonstrating link aggregation?
It would be really helpful ,if any one share their views on Link
aggreagation.
53 MBps sounds like your HD is your limitation. If you want to test
link aggregation, then use iperf- available via fink:
http://dast.nlanr.net/Projects/Iperf/
http://pdb.finkproject.org/pdb/section.php/net
or for the el-cheapo test, use time+dd from /dev/zero+netcat to some
destination.
To move large files around faster, you can try a RAID setup- Apple's
utilities make it trivial to setup.
Cheers,
M
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