Re: FTP /performance issue question

Also, you will get the netif_backup feature in case a single adapter
fails.

Lamar

-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@xxxxxxxxxxxxx] On Behalf Of
Andrew.Townsend@xxxxxxxxx
Sent: Tuesday, August 15, 2006 7:55 AM
To: aix-l@xxxxxxxxxxxxx
Subject: Re: FTP /performance issue question

That makes great sense.

I'll move in that direction once I get some downtime on that box.

Thanks!


IBM AIX Discussion List <aix-l@xxxxxxxxxxxxx> wrote on 08/14/2006
05:11:33
PM:

But would you not get better overall performance by having an
etherchannel and use the aggregate of both adapters vs. individual
adapters ? You could simply add an alias to the adapter or change the
name resolution for the separate IPs.

Lamar

-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@xxxxxxxxxxxxx] On Behalf
Of
Andrew.Townsend@xxxxxxxxx
Sent: Monday, August 14, 2006 4:03 PM
To: aix-l@xxxxxxxxxxxxx
Subject: Re: FTP /performance issue question

Basically we have an application that currently uses both IP addresses
and
we have each IP address attached to it's own nic.



IBM AIX Discussion List <aix-l@xxxxxxxxxxxxx> wrote on 08/14/2006
04:51:32
PM:

If you have 2 adapters on the same subnet why would you not
etherchannel
them vs. having separate IP addresses ?

Lamar

-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@xxxxxxxxxxxxx] On Behalf
Of
Andrew.Townsend@xxxxxxxxx
Sent: Monday, August 14, 2006 2:16 PM
To: aix-l@xxxxxxxxxxxxx
Subject: FTP /performance issue question

Hello,

I'm running a test FTPing files between two AIX servers.

Server proa has two network adapters on the same subnet, both Gig-E.

I've tested with TSM server, FTPing files from the TSM server
directly
to
each interface on proa. I've also FTPed files back. Below are some
averages
of transfer times.

X.X.1.11 interface:

Binary: 65536000 bytes sent in 0.7721 seconds (8.289e+04
Kbytes/s)
ascii: 65536000 bytes sent in 2.203 seconds (2.905e+04
Kbytes/s)


X.X.1.12 interface:

Binary: 65536000 bytes sent in 0.7652 seconds (8.364e+04
Kbytes/s)
ascii: 65536000 bytes sent in 2.224 seconds (2.877e+04
Kbytes/s)

FTPing back to the TSM server from proa, the results were pretty
consistent, taking much longer to FTP the files back from proa to
TSM
(this
would seem likely considering that I cannot choose which interface
to
send
files from):

Binary: 65536000 bytes sent in 1.099 seconds (5.821e+04
Kbytes/s)
ascii: 65536000 bytes sent in 1.297 seconds (4.935e+04
Kbytes/s)

Binary: 6536000 bytes sent in 1.121 seconds (5.707e+04
Kbytes/s)
ascii: 65536000 bytes sent in 1.307 seconds (4.898e+04
Kbytes/s)


I'm trying to troubleshoot why it takes so much longer to send a
file
to
proa regardless of which adapter I connect to, rather then sending a
file
from proa. I do realize that when sending the file from proa, I
cannot
choose which adapter to send from.

The actual command I am using to send the file once I connect using
ftp
is:
ftp> put "|dd if=/dev/zero bs=32k count=2000" /dev/null

If anyone would care to shed any light why I may be seeing this
symptom,
it
would be much appreciated.

TIA


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Relevant Pages

  • Re: FTP /performance issue question
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