DragonFlyBSD Multimedia Resources List
Links on this page refer to multimedia resources (podcast, vodcast,
audio recordings, video recordings, photos) related to DragonFlyBSD or
of interest for DragonFlyBSD users.
This list is available as chronological
overview, as a tag cloud and
via the sources.
This list is also available as RSS feed
If you know any resources not listed here, or notice any dead links,
please send details to
Edwin Groothuis so that
it can be included or updated.
Tag: john mashey
Postfix Performance Tuning
Source: New York City *BSD User Group
Added: 21 February 2009
Tags: nycbug, presentation, postfix, john mashey
MP3 version (11 Mb)
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.
|
|