Packet collision on Samba traffic

Richard Sharpe sharpe at ns.aus.com
Fri Apr 6 14:58:49 GMT 2001


At 11:33 PM 4/6/01 +0900, Richard Sharpe wrote:
>At 03:37 PM 4/5/01 -0700, Andrew Tridgell wrote:
>>Okuyama-san, 
>>
>>> How about
>>> 
>>> http://www.dd.iij4u.or.jp/~okuyamak/Documents/tuning.english.html
>
>Hmmm, well an SMB style test shows similar results. Samba never fills the
>window, because Win95 uses an SMBreadBraw request with a max size of 4608.
>Samba sends 4 segments, 3 with 1460 bytes, and 1 with 232 bytes. Windows
>Acks and opens the window to 8760.
>
>However, this time around, it takes Samba/Linux 16 mS to get the first
>segment out in response to the SMBreadBraw, with the subsequent segments
>taking 10 mS to get out the door.

On further examination, I have found cases where Samba/Linux took 2mS to
get the first segment out the door with the subsequent segments taking 1mS
each, so the numbers I quoted above are clearly file system effects.

>>Cheers, Tridge
>>
>
>Regards
>-------
>Richard Sharpe, sharpe at ns.aus.com
>Samba (Team member, www.samba.org), Ethereal (Team member, www.ethereal.com)
>Contributing author, SAMS Teach Yourself Samba in 24 Hours
>Author, Special Edition, Using Samba
>
>
>

Regards
-------
Richard Sharpe, sharpe at ns.aus.com
Samba (Team member, www.samba.org), Ethereal (Team member, www.ethereal.com)
Contributing author, SAMS Teach Yourself Samba in 24 Hours
Author, Special Edition, Using Samba






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