Either way Andres. We appreciate the talk. My masters OS design class
talked about this for 45 mins today :-) You are a celebrity.
On Tue, Aug 4, 2009 at 2:35 PM, Brian J. Murrell wrote:
> On Tue, 2009-08-04 at 11:17 -0600, Andreas Dilger wrote:
>>
>> To be more clear - TCP isn't used on IB, Elan
On Aug 04, 2009 14:35 -0400, Brian J. Murrell wrote:
> On Tue, 2009-08-04 at 11:17 -0600, Andreas Dilger wrote:
> > To be more clear - TCP isn't used on IB, Elan, Myrinet, Cray networks.
> > On the socklnd (TCP sockets over IP, called tcplnd on some platforms)
>
> tcplnd or socklnd? Generally it
On Tue, 2009-08-04 at 11:17 -0600, Andreas Dilger wrote:
>
> To be more clear - TCP isn't used on IB, Elan, Myrinet, Cray networks.
> On the socklnd (TCP sockets over IP, called tcplnd on some platforms)
tcplnd or socklnd? Generally it's the latter, but I wonder if you are
referring to some plat
On Aug 03, 2009 08:55 -0400, Brock Palen wrote:
> Thanks to Andreas for taking an hour out to talk with Jeff Squyres and
> myself (Brock Palen) about the Lustre cluster filesystem on our
> podcast www.rce-cast.com,
>
> You can find the whole show at:
> http://www.rce-cast.com/index.php/Podcas
On Aug 03, 2009 22:33 -0400, Mag Gam wrote:
> its really bizzare because you can read all the manuals in the world
> and read all the responses on the mailing list, but 30 mins of a good
> developers time is priceless. I never even knew lnet didn't use tcp!
To be more clear - TCP isn't used on IB
Palen [bro...@umich.edu]
> Sent: 08/03/2009 08:35 PM AST
> To: Mag Gam
> Cc: lustre-discuss discuss
> Subject: Re: [Lustre-discuss] Lustre featured on podcast (HT: Andreas Dilger)
>
>
>
> http://en.wikipedia.org/wiki/Nagle%27s_algorithm
>
> Looks like you intentio
Yes, it hold up any packet that is less than the size of the header, and
forwards multiple.
- Original Message -
From: Brock Palen [bro...@umich.edu]
Sent: 08/03/2009 08:35 PM AST
To: Mag Gam
Cc: lustre-discuss discuss
Subject: Re: [Lustre-discuss] Lustre featured on podcast (HT
its really bizzare because you can read all the manuals in the world
and read all the responses on the mailing list, but 30 mins of a good
developers time is priceless. I never even knew lnet didn't use tcp!
Thats great stuff
On Mon, Aug 3, 2009 at 10:32 PM, Kevin Van Maren wrote:
> Yes, original
Yes, originally designed so multiple send() calls with small data have
a chance to be combined by TCP before being sent over the network --
improve behavior of applications doing small writes.
Setting tcp_nodelay disables Nagle, as the additional latency can hurt
some interactive session per
eitherway, good job on the interview. Andres was a sport. try to
interview more Lustre developers :-)
On Mon, Aug 3, 2009 at 8:35 PM, Brock Palen wrote:
> http://en.wikipedia.org/wiki/Nagle%27s_algorithm
>
> Looks like you intentionally hold up data to try to make fatter payloads in
> packets
http://en.wikipedia.org/wiki/Nagle%27s_algorithm
Looks like you intentionally hold up data to try to make fatter
payloads in packets so they are not 99% header/crc data. Sounds like
a way to make latency bad.
Brock Palen
www.umich.edu/~brockp
Center for Advanced Computing
bro...@umich.edu
(7
Very nice.
15:54, what is "Nagle" ?
He didn't say anything about SNS, but changeLogs seems very promising!
On Mon, Aug 3, 2009 at 8:55 AM, Brock Palen wrote:
> Thanks to Andreas for taking an hour out to talk with Jeff Squyres and
> myself (Brock Palen) about the Lustre cluster filesystem on o
Thanks to Andreas for taking an hour out to talk with Jeff Squyres and
myself (Brock Palen) about the Lustre cluster filesystem on our
podcast www.rce-cast.com,
You can find the whole show at:
http://www.rce-cast.com/index.php/Podcast/rce-14-lustre-cluster-filesystem.html
Thanks again!
If any
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