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NYC LOCAL: Wednesday 4 February 2009 NYCBUG: Victor Duchovni on Postfix

From: secretary
Subject: NYC LOCAL: Wednesday 4 February 2009 NYCBUG: Victor Duchovni on Postfix Performance Tuning
Date: 3 Feb 2009 12:44:50 -0500

  what="official NYCBUG announcement"
  side-note="The NYLUG Python Group will meet today at 6:00 pm
             in the IBM building at 57th Street and Madison Avenue.
             This place is not the usual place of meeting.">

 Date: Sun, 01 Feb 2009 23:00:17 -0500
 From: NYC*BUG Announcements <>
 Subject: [announce] NYC*BUG Wednesday February 4: Postfix;  DCBSDCon

 February 04, 2009, Wednesday

 Postfix Performance Tuning

 6:45 pm, Suspenders Restaurant
 Please note later time!

 Money can buy you bandwidth, but latency is forever!

 John Mashey, MIPS

 Victor will cover an array of issues connected to Postfix performance 
 tuning, including:
 # Latency, concurrency and throughput
 # Postfix input processing
 # Queue file format rationale
 # Input processing bottlenecks
 # Pre-queue filters, milters, content filters
 # Tuning for fast (enough) input
 # Postfix on-disk queues, requirements and architecture
 # What is a "transport"?
 # Postfix "nqmgr" scheduler algorithm
 # Per-destination in memory queues
 # Per-destination scheduler controls
 # SMTP delivery
 # Understanding delay logging
 # Transport process limits, concurrency limits
 # Scaling to thousands of output processes
 # Connection caching, TLS session caching, feedback controls

 Speaker Bio

 Victor Duchovni trained in mathematics, switched tracks to CS in 1980s 
 leaving Princeton with a master`s degree in mathematics and newly 
 acquired skills in Unix system administration and system programming. In 
 1990 moved to Lehman Brothers, worked on system management tooling, and 
 network engineering. Ported "Moira" from MIT to Lehman, built efficient 
 build systems that predated (and partly inspired) Jumpstart. In 1994 
 joined ESM to market "CMDB" tools to enterprise users, but this did not 
 pan out, in the mean time learned Tcl, and contributed bunch of patches 
 to the 7.x early 8.x TCL releases. In 1997 returned to New York, working 
 in IT Security at Morgan Stanley since late 1999. At Morgan Stanley, 
 developed a hobby in perimeter email security, becoming an active 
 Postfix user and very soon contributor in May of 2001. In addition to 
 many smaller feature improvements, contributed initial implementation of 
 SMTP connection caching, overhauled and currently maintain LDAP and TLS 
 support. Made significant design contributions to queue manager in 
 collaboration with Wietse and Patrik Raq. In 2.6 contributing support 
 for TLS EC ciphers and multi-instance management tooling, ideally also 
 TLS SNI if time permits.

 *      *       *       *

 DCBSDCon begins the morning of February 5th at 10 am at the Marriott 
 Wardman in Washington DC.

 Anyone who needs to work out transportation or hotel should hit the talk 
 list to coordinate.
 announce mailing list

Distributed poC TINC:

Jay Sulzberger <>
Corresponding Secretary LXNY
LXNY is New York's Free Computing Organization.

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