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Note: Developers writing applications for OS X do not need to incorporate
this code into their applications, since OS X provides a system service to
handle this for them. If every application developer were to link-in the
mDNSResponder code into their application, then we would end up with a
situation like the picture below:

  +------------------+    +------------------+    +------------------+
  |   Application 1  |    |   Application 2  |    |   Application 3  |
  +------------------+    +------------------+    +------------------+
  |    mDNS Core     |    |    mDNS Core     |    |    mDNS Core     |

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commit e95636528228a11ed22e5d17e160d69325e8572f
Author: Alexey Ivanov <[email protected]>
Date:   Tue Jul 31 01:48:45 2012 +0400

    YANDEX: Added "fade" readahead type
    
    This replaces comlicated logic with simple one:
    * If we've already read more than file size -- read 8 pages
    * Else if we read more than file size / 2 -- read (ra_pages / 4) pages
    * Otherwise read 8 pages

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commit e4d08801d7cfb46a2f8cd46049c455f63d85a064
Author: Alexey Ivanov <[email protected]>
Date:   Wed Jul 18 22:14:36 2012 +0400

    YANDEX: tcp: Added knobs to tune initial window sizes
    
    Added following sysctls
    
    /* TCP initial congestion window */
    TCP_INIT_CWND -> net.ipv4.tcp_init_cwnd

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Linux Kernel Development

Third Edition by Robert Love is an excellent book, but still there is a way for improvement. I'll attached tiny errata and my wishlist below.

Chapter 7: Interrupts and Interrupt Handlers

Wishlist

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root@ws36-000:~# cat /etc/udev/rules.d/80-iosched.rules 
# Default CFQ settings does not perform well in our environment. Switch it to
# IOPS mode and use NCQ.
#
# XXX: This applies even for SATA drives. If you want to disable IOPS mode on
# SATA drives uncomment following line:
#ENV{ID_BUS}=="ata", GOTO="end_iosched"

SUBSYSTEM!="block", GOTO="end_iosched"
KERNEL=="dm-*", GOTO="end_iosched"

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Errata for Python Essential Reference

Fourth Edition (by David M. Beazley)

Chapter 9

p. 170

I'm myself by no means UTF-8 guru but there is some inconsistency with `RFC3629`_:

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commit 99f490afdc91d4965aafd5629567ef02c515e169
Author: Alexey Ivanov <[email protected]>
Date:   Tue Apr 17 16:55:10 2012 +0400

    YANDEX: tcpm: Added TCP sysctl tunables
    
    I made following constants tunable for internal testing:
    TCP_DELACK_MIN    -> net.ipv4.tcp_delack_min
    TCP_DELACK_MAX    -> net.ipv4.tcp_delack_max
    TCP_ATO_MIN       -> net.ipv4.tcp_ato_min

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#!/usr/bin/env python

import logging as log
from fileinput import input
from collections import namedtuple, defaultdict
from pprint import pprint

if __debug__:
    log_level = log.DEBUG
else:

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#!/usr/bin/env
# -*- coding: utf-8 -*-

from collections import Counter
from contextlib import contextmanager

def djb2(uuid):
    """ See for details: http://www.cse.yorku.ca/~oz/hash.html """

    _hash = 5381

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$ git log | perl -nle 'print $1 if /.*Sponsored by:\s+(?:The )?(.+?)\b.*/'|sort|uniq -c|sort -nr
1160 DARPA
 330 FreeBSD
 202 Isilon
 146 Google
  96 Sandvine
  85 iXsystems
  64 TCP
  56 Juniper
  47 Nokia