[B! network] mogwaingã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

mogwaing id:mogwaing

networkã«é–¢ã™ã‚‹mogwaingã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (129)

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Linuxã§ãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚µã‚„ã‚ãƒ£ãƒƒã‚·ãƒ¥ã‚µãƒ¼ãƒã‚’ãƒžãƒ«ãƒã‚³ã‚¢ã‚¹ã‚±ãƒ¼ãƒ«ã•ã›ã‚‹ãŸã‚ã®ã‚«ãƒ¼ãƒãƒ«ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚° - ã‚†ã†ã†ããƒ–ãƒã‚°
æœ¬è¨˜äº‹ã®å…¬é–‹å¾Œã®2016å¹´7æœˆã«ã¯ã¦ãªã«ãŠã‘ã‚‹ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°äº‹ä¾‹ã‚’ç´¹ä»‹ã—ãŸã€‚ ã¯ã¦ãªã«ãŠã‘ã‚‹Linuxãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹æ”¹å–„ / Linux network performance improvement at hatena - Speaker Deck HAProxy ã‚„ nginx ãªã©ã®ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚µã‚„ãƒªãƒãƒ¼ã‚¹ãƒ—ãƒã‚ã‚·ã€memcached ãªã©ã® KVS ã®ã‚ˆã†ãªé«˜ãƒ‘ã‚±ãƒƒãƒˆãƒ¬ãƒ¼ãƒˆã«ãªã‚Šã‚„ã™ã„ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã«ãŠã„ã¦ã€å˜ä¸€ã® CPU ã‚³ã‚¢ã«è² è·ãŒåã‚Šã€ãƒžãƒ«ãƒã‚³ã‚¢ã‚¹ã‚±ãƒ¼ãƒ«ã—ãªã„ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚ ä»Šå›žã¯ã€ã“ã®ã‚ˆã†ãªãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã«ãŠã„ã¦ CPU è² è·ãŒãƒžãƒ«ãƒã‚³ã‚¢ã‚¹ã‚±ãƒ¼ãƒ«ã—ãªã„ç†ç”±ã¨ã€ãƒžãƒ«ãƒã‚³ã‚¢ã‚¹ã‚±ãƒ¼ãƒ«ã•ã›ã‚‹ãŸã‚ã® Linux ã‚«ãƒ¼ãƒãƒ«ã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ã®ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°æ‰‹æ³•ã¨ã—ã¦ RFS (Receive Flow Steering) ã‚’
mogwaing 2015/03/31
network

linux
ãƒªãƒ³ã‚¯
netmap - the fast packet I/O framework
net map is a framework for high speed packet I/O. Together with its companion VALE software switch, it is implemented as a single kernel module and available for FreeBSD, Linux and now also Windows (OSX still missing, unfortunately). net map supports access to network cards (NICs), host stack, virtual ports (the "VALE" switch), and "net map pipes". It can easily reach line rate on 10G NICs (14.88Â Mpp
mogwaing 2013/08/14
network

tpc

framework

library

usenix
ãƒªãƒ³ã‚¯
http://www.ll.mit.edu/HPEC/agendas/proc04/invited/patterson_keynote.pdf
mogwaing 2013/07/23
For disk, LAN, memory, and MPU, in the time that bandwidth doubles, latency improves by no more than 1.2X to 1.4X

computer

cpu

memory

disk

network

system

research

history
ãƒªãƒ³ã‚¯
Marvell Technology, Inc. | Essential technology, done right
mogwaing 2013/07/17
ethernet

network

latency
ãƒªãƒ³ã‚¯
Intel Gigabit Performance - NuclearCat's homepage
mogwaing 2013/04/02
network

intel

nic
ãƒªãƒ³ã‚¯
Working with NIC Ring Buffers | SAM's Guide to Linux Administration
mogwaing 2013/04/02
network

ethernet

nic
ãƒªãƒ³ã‚¯
Networking in the Linux Kernel [Old OpenWrt Wiki]
Above we read merely about the theory of networking, about the basic ideas, about communication protocols and standards. Now, let us see, how all of this is being handled by the Linux Kernel 2.6: Everything related is found under /net/. But drivers, for the network devices, are of course found /drivers/. NOTE:
mogwaing 2013/04/02
network

nic

linux
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Networking | TechRepublic
A stateless firewall is an efficient, low-maintenance way to screen lots of network traffic quickly â€” but there are a few important drawbacks.
mogwaing 2012/11/25
linux

network

tuning
ãƒªãƒ³ã‚¯
Linuxã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ãƒ«ãƒ¼ãƒ—ãƒƒãƒˆæ”¹å–„æ³•æ•™ãˆã¾ã™ - builder by ZDNet Japan
Linuxã®ã‚«ãƒ¼ãƒãƒ«ã‚„ãã‚Œã‚’å«ã‚€ãƒ‡ã‚£ã‚¹ãƒˆãƒªãƒ“ãƒ¥ãƒ¼ã‚·ãƒ§ãƒ³ã§ã¯ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã®ãƒ‘ãƒ©ãƒ¡ãƒ¼ã‚¿ã«å½±éŸ¿ã‚’ä¸Žãˆã‚‹ã‚ˆã†ãªè¨å®šã®ä¸€éƒ¨ã¯ã€ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã§ã¯éžå¸¸ã«æŽ§ãˆã‚ã«è¨å®šã•ã‚Œã¦ã„ã‚‹ã“ã¨ãŒä¸€èˆ¬çš„ã§ã‚ã‚‹ã€‚ã“ã®ã‚ˆã†ãªè¨å®šã‚’ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã™ã‚‹ã«ã¯ã€/procãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã‚’ä½¿ç”¨ã™ã‚‹æ–¹æ³•ã‚„sysctlãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ç”¨ã„ã‚‹æ–¹æ³•ãŒã‚ã‚‹ãŒã€ã©ã¡ã‚‰ã‹ã¨ã„ã†ã¨å¾Œè€…ã®æ–¹ãŒã‚ˆã„å ´åˆãŒå¤šã„ã€‚ãªãœã‹ã¨ã„ã†ã¨ã€å¾Œè€…ã®å ´åˆã¯/etc/sysctl.confãƒ•ã‚¡ã‚¤ãƒ«ã®å†…å®¹ã‚’èªã¿å–ã‚‹ãŸã‚ã€ãƒªãƒ–ãƒ¼ãƒˆã‚’è¡Œã£ã¦ã‚‚è¨å®šãŒä¿æŒã•ã‚Œã‚‹ã‹ã‚‰ã ã€‚ /etc/sysctl.confã§è¡Œãˆã‚‹è¨å®šã®ã†ã¡ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã‚’å‘ä¸Šã•ã›ã‚‹å¯èƒ½æ€§ãŒã‚ã‚‹è¨å®šã‚’ä»¥ä¸‹ã«ç¤ºãã†ã€‚ net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_syncookies = 1 net.core.rmem_max = 16777216 net.core
mogwaing 2012/11/25
linux

network

tuning
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Linux Tuning
This page contains a quick reference guide for Linux tuning for Data Transfer hosts connected at speeds of 1Gbps or higher. Note that most of the tuning settings described here will actually decrease performance of hosts connected at rates less than 1Gbps, such as most home users. Note that the settings on this page are not attempting to achieve full 10G with a single flow. These settings assume y
mogwaing 2012/11/25
linux

network

tuning
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é€šä¿¡æŠ€è¡“ã€€å‚™å¿˜éŒ²ã€€EtherNetã®å®ŸåŠ¹é€šä¿¡é€Ÿåº¦
EtherNetã®å®ŸåŠ¹é€šä¿¡é€Ÿåº¦ã«ã¤ã„ã¦ é€šä¿¡ã®ä¸–ç•Œã§ã¯ã‚µãƒ¼ãƒ“ã‚¹ãƒ¡ãƒ‹ãƒ¥ãƒ¼ã¨ã—ã¦ã‚ˆã1ç§’é–“ã‚ãŸã‚Šã®ä¼é€ã§ãã‚‹ãƒ“ãƒƒãƒˆæ•°ã§åŒºåˆ¥ã‚’ã™ã‚‹ã€‚ ã‚ˆãã‚ã‚‹ã®ãŒã€Ehternetã®å¸¯åŸŸã‚’åŸºæœ¬ã¨ã™ã‚‹ã‚‚ã®ã€10Mbps,100Mbps,1Gbpsç‰ãªã© æ¦‚ãã®äººã¯ãã®ã‚«ã‚¿ãƒã‚°ä¸Šã®é€šä¿¡å¸¯åŸŸã¨å®Ÿéš›ã«æµã‚Œã‚‹å¸¯åŸŸï¼ˆãƒ“ãƒƒãƒˆæ•°ï¼‰ã«ã¯å·®ãŒã‚ã‚‹ã¨ã„ã†äº‹ã¯èªè˜ã—ã¦ã„ã‚‹ã¨æ€ã„ã¾ã™ãŒã€å®Ÿéš›ã©ã®ãã‚‰ã„ã®å®ŸåŠ¹å¸¯åŸŸãªã®ã‹ã‚’ã¾ã¨ã‚ã¦ã¿ã‚‹ã€‚ ã‚¤ãƒ¼ã‚µãƒãƒƒãƒˆã®ãƒ•ãƒ¬ãƒ¼ãƒ æ§‹é€ â€»ã‚¯ãƒªãƒƒã‚¯ã—ã¦å¤§ããã—ã¦ãã ã•ã„ã€‚ å®Ÿéš›ã«ä¼é€è·¯ã‚’æµã‚Œã‚‹ãƒ•ãƒ¬ãƒ¼ãƒ ã¯ä¸Šå›³ã®ã‚ˆã†ãªå½¢ã¨ãªã‚‹ã€‚æ•°å€¤ã¯byteæ•°ã§ã‚ã‚‹ã€‚ å›³ã®å·¦å´ã‹ã‚‰ãƒ•ãƒ¬ãƒ¼ãƒ ãŒæµã‚Œã¦ã„ã‚‹å›³ã§ã‚ã‚‹ã€‚ ã‚¤ãƒ¼ã‚µãƒãƒƒãƒˆãƒ•ãƒ¬ãƒ¼ãƒ ã®å¤§ãã•ï¼ˆãƒã‚¤ãƒˆæ•°ï¼‰ã‚’è¡¨è¨˜ã™ã‚‹ã¨ãã¯å®›å…ˆMACã‚¢ãƒ‰ãƒ¬ã‚¹ã‹ã‚‰FCSã®æœ€å¾Œã¾ã§ã‚’ã„ã„ã€ãã®å€¤ã¯64byteï½ž1518byteã¾ã§ã®å¯å¤‰å€¤ã¨ãªã‚‹ã€‚ å®Ÿéš›ã®ãƒ¦ãƒ¼ã‚¶ãƒ‡ãƒ¼ã‚¿ã¯46byteï½ž1500byteã¾ã§ã®å¯å¤‰å€¤
mogwaing 2012/10/09
network

ethernet
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MPI Persistent Communication
Persistent communication is an optimization for point to point message passing. This module describes when it is appropriate, how it reduces system overhead, and how it is used in a program. Improvement in wallclock time for IBM's MPI on the SP is documented. In the lab exercises, you will modify a code to use persistent communication, and compare the timing for the original and optimized version.
mogwaing 2012/09/16
non-blocking persistent communication in MPI

mpi

network
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ç¬¬5å›ž ã‚¤ãƒ¼ã‚µãƒãƒƒãƒˆã‚’é«˜é€ŸåŒ–ã™ã‚‹ã‚¸ãƒ£ãƒ³ãƒœãƒ»ãƒ•ãƒ¬ãƒ¼ãƒ æŠ€è¡“
ã‚¤ãƒ¼ã‚µãƒãƒƒãƒˆã®ãƒ•ãƒ¬ãƒ¼ãƒ ã‚’æ‹¡å¼µã—ã¦ã€æ•°Kbytesã®ãƒ‡ãƒ¼ã‚¿ã‚’1å›žã§é€ä¿¡ã§ãã‚‹ã‚ˆã†ã«ã™ã‚‹ã‚¸ãƒ£ãƒ³ãƒœãƒ•ãƒ¬ãƒ¼ãƒ ã€‚ãã®ä»•çµ„ã¿ã‚„æ³¨æ„ç‚¹ã«ã¤ã„ã¦è§£èª¬ã€‚ é€£è¼‰ç›®æ¬¡ ã‚¸ãƒ£ãƒ³ãƒœãƒ»ãƒ•ãƒ¬ãƒ¼ãƒ ã§ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã‚’å‘ä¸Šã•ã›ã‚‹ ãƒ«ãƒ¼ã‚¿ã‚„ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãƒ»ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ã‚¤ã‚¹ãƒ»ã‚«ãƒ¼ãƒ‰ï¼ˆNICï¼‰ãªã©ã€æœ€è¿‘ã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯æ©Ÿå™¨ã®ä»•æ§˜ã‚’è¦‹ã‚‹ã¨ã€ã€Œã‚¸ãƒ£ãƒ³ãƒœãƒ»ãƒ•ãƒ¬ãƒ¼ãƒ ã‚’ã‚µãƒãƒ¼ãƒˆã€ã—ãŸã¨ã„ã†è¨˜è¿°ãŒã‚ˆãè¦‹å—ã‘ã‚‰ã‚Œã‚‹ã€‚ã“ã‚Œã‚’ä½¿ã†ã¨ã€å¤šãã®ãƒ‡ãƒ¼ã‚¿ã‚’ä¸€åº¦ã«è»¢é€ã§ãã€ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ãŒå‘ä¸Šã™ã‚‹ã€ä¾‹ãˆã°ãƒ•ã‚¡ã‚¤ãƒ«ãƒ»ã‚µãƒ¼ãƒã‚„Webãƒ–ãƒ©ã‚¦ã‚¶ã®é€Ÿåº¦ãŒå‘ä¸Šã—ã€å¿«é©ã«ä½¿ãˆã‚‹ã‚ˆã†ã«ãªã‚‹ã€ã¨ã„ã£ãŸã“ã¨ã‚’é€£æƒ³ã™ã‚‹ã€‚ã ãŒãã®ä¸€æ–¹ã§ã€ã€Œã‚¸ãƒ£ãƒ³ãƒœãƒ»ãƒ•ãƒ¬ãƒ¼ãƒ ã‚’æ´»ç”¨ã™ã‚‹ã«ã¯ã€ã™ã¹ã¦ã®æ©Ÿå™¨ãŒã‚¸ãƒ£ãƒ³ãƒœãƒ»ãƒ•ãƒ¬ãƒ¼ãƒ ã«å¯¾å¿œã—ã¦ã„ã‚‹å¿…è¦ãŒã‚ã‚‹ã€ã¨ã‚‚æ›¸ã‹ã‚Œã¦ã„ã‚‹ãŒã€ã“ã‚Œã¯å…·ä½“çš„ã«ã¯ã©ã®ã‚ˆã†ãªçŠ¶æ…‹ã‚’æŒ‡ã™ã®ã ã‚ã†ã‹ï¼Ÿ ãƒ•ã‚¡ã‚¤ãƒ«ãƒ»ã‚µãƒ¼ãƒã«ã‚¢ã‚¯ã‚»ã‚¹ã™ã‚‹å ´åˆã¯ãªã‚“ã¨ãªãåˆ†ã‹ã‚‹ãŒã€ã§ã¯ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒƒ
mogwaing 2012/06/12
network

jumbo frame
ãƒªãƒ³ã‚¯
sysctl - ArchWiki
4.1.3Increase the memory dedicated to the network interfaces
mogwaing 2012/06/06
This may cause dropped frames with load-balancing and NATs, only use this for a server that communicates only over your local network. net.ipv4.tcp_tw_reuse, net.ipv4.tcp_tw_recycle

network

linux

kernel
ãƒªãƒ³ã‚¯
ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯å®Ÿç¿’/2011.08/è…è°·/2æ—¥ç›® - INE wiki
mogwaing 2012/05/31
network

linux

rip

quagga
ãƒªãƒ³ã‚¯
ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯æ©Ÿå™¨ã®å‡¦ç†æ€§èƒ½ã«ã¤ã„ã¦
ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯æ©Ÿå™¨ã®å‡¦ç†æ€§èƒ½ã«ã¤ã„ã¦ ã‚¹ã‚¤ãƒƒãƒãªã©ã®LANæ©Ÿå™¨ã®ã‚«ã‚¿ãƒã‚°ã‚’è¦‹ã‚‹ã¨ ãƒãƒƒã‚¯ãƒ—ãƒ¬ãƒ¼ãƒ³ 8.8Gbps ã ã¨ã‹ ã‚¹ã‚¤ãƒƒãƒãƒ³ã‚°å‡¦ç†èƒ½åŠ› 3.6Mpps ãªã‚“ã¦æ›¸ã‹ã‚Œã¦ã„ãŸã‚Šã—ã¾ã™ã€‚ ãã‚‚ãã‚‚ã“ã“ã§æ›¸ã‹ã‚Œã¦ã„ã‚‹æ•°å—ãŒã©ã‚Œã»ã©ã®èƒ½åŠ›ã‚’ç¤ºã—ã¦ã„ã‚‹ã®ã‹ã£ã¦åˆ†ã‹ã‚Šã¾ã™ã‹ï¼Ÿ æ™®é€šã«ã‚¹ã‚¤ãƒƒãƒã‚’ä½¿ç”¨ã—ã¦ã„ã‚‹ã®ã§ã‚ã‚Œã°ç‰¹ã«æ°—ã«ã—ãªãã¦ã‚‚ä½¿ãˆã¦ã—ã¾ã†ã®ã§æ„å¤–ã«æ°—ã«ã—ã¦ã„ãªã„æ–¹ã‚‚ã„ã‚‹ã‚ˆã†ãªã®ã§ã™ãŒã€ã„ã–ã¨ã„ã†ã¨ãã«é‡è¦ã ã£ãŸã‚Šã—ã¾ã™ã€‚ ä»Šå›žã¯ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯æ©Ÿå™¨ã®å‡¦ç†èƒ½åŠ›ã«ã¤ã„ã¦èª¬æ˜Žã—ã¦ã„ãã¾ã™ã€‚ ãƒãƒƒã‚¯ãƒ—ãƒ¬ãƒ¼ãƒ³ ãƒãƒƒã‚¯ãƒ—ãƒ¬ãƒ¼ãƒ³å®¹é‡ã¨ã¯ã‚¹ã‚¤ãƒƒãƒå…¨ä½“ã§ã®1ç§’é–“ã§å‡¦ç†ã§ãã‚‹ãƒ‡ãƒ¼ã‚¿é‡ã‚’è¡¨ã—ã¦ã„ã¾ã™ã€‚ ãƒ¡ãƒ¼ã‚«ã«ã‚ˆã£ã¦ã¯ã€Œã‚¹ã‚¤ãƒƒãƒãƒ³ã‚°ãƒ•ã‚¡ãƒ–ãƒªãƒƒã‚¯ã€ã ã¨ã‹ã€Œã‚¹ã‚¤ãƒƒãƒãƒ³ã‚°å®¹é‡ã€ãªã‚“ã¦ã„ã†å ´åˆã‚‚ã‚ã‚Šã¾ã™ã€‚ bps(Bit Per Second)ã®å˜ä½ã§è¡¨ã•ã‚Œã¾ã™ã€‚ ãƒãƒƒã‚¯ãƒ—ãƒ¬ãƒ¼ãƒ³ã¨ã¯ã€æœ¬æ¥ã‚¹ã‚¤ãƒƒãƒå†…éƒ¨ã®ãƒ‡ãƒ¼ã‚¿ç”¨ãƒã‚¹ã®ã“ã¨ã§ã€
mogwaing 2012/05/22
network

performance
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ç¸²å¾Œã›ç¹§ï½¤ç¹ï¿½ãƒ¡ç¸²é˜ªâ†’è³ï¿½èœ¿ï½£ç¸ºï½§ç¸ºï¿½â–²ç¸ºï½¦ç¹§ã‚…ï¿½ç¹ï½»ç¹ï½» ç¹§ï½¹ç¹§ï½¤ç¹ï¿½ãƒ¡ç¸ºï½¯ç¸²âˆ«æ¨Ÿè¨ï½¨ç¸ºï½®LANç¸ºï½§ç¸ºï½¯ç¹§ã‚…â‰§è°ºï¿½ç¸ºä¸Šï¼…ç¸ºï½¨ç¸ºå¾Œã€’ç¸ºé˜ªâ†‘ç¸ºï¿½âŠ‡ç¸ºï½©ç¸²âˆï½¿ï¿½ï¿½åŒ»ï¿½ç¹é˜ªãƒ£ç¹åŒ»Î¡ç¹ï½¼ç¹§ï½¯è®–æº·å‹£ç¸ºï½§ç¸ºå¶ï¿½ã‚…ã›ç¹§ï½¤ç¹ï¿½ãƒ¡ç¸ºï½®èœ»ï½¼ç¸ºï½³èï½¹ç¸ºï½¯ç¸²âˆšï¿½å¾Œã›ç¹§ï½¤ç¹ï¿½ãƒ¡ç¹ï½³ç¹§ï½°ç¹ä¸Šãƒ¶ç¸²é˜ªâ†’ç¸ºä¹ï¿½é¬ANç¹§ï½¹ç¹§ï½¤ç¹ï¿½ãƒ¡ç¸²é˜ªâ†’ç¸ºä¹ï¿½âˆšï¿½å¾ŒÎžç¹§ï½¤ç¹ï½¤2ç¹§ï½¹ç¹§ï½¤ç¹ï¿½ãƒ¡ç¸²é˜ªâ†’ç¸ºä¹ï¿½ç¹ï½»ç¹ï½»ç¸ºï½¾ç¸ºæº˜âˆªç¸ºæº˜ï¿½å¾ŒÎžç¹§ï½¤ç¹ï½¤3ç¹§ï½¹ç¹§ï½¤ç¹ï¿½ãƒ¡ç¸²é˜ªâ†’ç¸ºä¹Îžç¹§ï½¤ç¹ï½¤ï¿½æ§ã›ç¹§ï½¤ç¹ï¿½ãƒ¡ç¸ºï½¨ç¸ºï¿½â‰§ç¸ºï½®ç¹§ã‚…â—†ç¸ºä¸Šï¼†ç¹§æ¥¢â—‡ç¸ºä¸Šï¼…ç¸ºï½¨ç¸ºå¾Œâ‰ ç¹§ä¹â†’è«¤æ˜´ï¼žç¸ºï½¾ç¸ºå¶ï¿½ï¿½ è³ï¿½èœ¿ï½£ç¸ºï½«ç¹§ï½¹ç¹§ï½¤ç¹ï¿½ãƒ¡ç¸ºï½¨ç¸ºï¿½â–²ç¸ºï½¦ç¹§ã‚…ï¿½âˆšã›ç¹§ï½¤ç¹ï¿½ãƒ¡ç¸ºï½«ç¸ºï½¯ç¸²âˆï½®ï½¶è Žï½ç¸ºï½§ç¹§ã‚‡èŒœé€•ï½¨ç¸ºï½§ç¸ºé˜ªï½‹ç¹§åŒ»â‰§ç¸ºï½ª4ç¹æ˜´ï¿½ç¹è‚²ï½¨å¥ï½ºï½¦ç¸ºï½®é™¬ï½½èœ©âˆšÂ°ç¹§æˆ‘ï½¼âˆµï½¥ï½èœ€ï¿½ï¿½ç¹èˆŒãƒ£ç¹§ï½¯ç¹æ‡Šï¿½ç¹ï½³ç¸ºï½§è›»ï½©é€•ï½¨ç¸ºè¼”ï½Œç¹§ä¹ï½ˆç¸ºï¿½â†‘è¬¨ï½°é€‹ï½¾ç¹æ˜´ï¿½ç¹åŒ»ï½‚è›¯å¶ï½ç¸ºï½£ç¸ºï½¦ç¸ºï¿½ï½‹é™¬ï½½èœ©âˆšâ€²ç¸ºã‚…ï½Šç¸ºï½¾ç¸ºå¶ï¿½ã‚…
mogwaing 2012/05/22
network

switch

performance
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Docs Performance - Lighttpd - lighty labs
Table of contentsPerformance Tuningimportant performance tuning ruleslighttpd configuration performance tuning (technical guidelines)lighttpd configuration for use of operating system (OS) featureslighttpd configuration tuning for high-traffic sites with a large number of connectionslighttpd configuration tuning for low-memory systemslighttpd configuration tuning for lighttpd behind a reverse prox
mogwaing 2012/03/27
network-related kernel parameters for high-traffic sites.

network

lighttpd

kernel
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TCPã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã®ç¢ºç«‹ï¼†åˆ‡æ– - ã„ã‚ã„ã‚è§£æžæ—¥è¨˜
TCPã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã®ç¢ºç«‹ï¼†åˆ‡æ–ã¯ã€ï¼“ã‚¦ã‚§ã‚¤ãƒãƒ³ãƒ‰ã‚·ã‚§ã‚¤ã‚¯(ï¼“ã¤ã®ãƒ‘ã‚±ãƒƒãƒˆã®ã‚„ã‚Šå–ã‚Š)ã§è¡Œã‚ã‚Œã¾ã™ã€‚ãªãŠã€å®Ÿéš›ã®ãƒ‡ãƒ¼ã‚¿é€ä¿¡ã¯ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãŒç¢ºç«‹ã•ã‚ŒãŸå¾Œã«è¡Œã‚ã‚Œã¾ã™ã€‚ ç›®æ¬¡ ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ç¢ºç«‹æˆåŠŸ ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ç¢ºç«‹å¤±æ•— ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³åˆ‡æ– â– ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ç¢ºç«‹æˆåŠŸ ç›¸æ‰‹ãƒ›ã‚¹ãƒˆã®æº–å‚™ãŒã§ãã¦ã„ã‚‹å ´åˆã€ï¼“ã‚¦ã‚§ã‚¤ãƒãƒ³ãƒ‰ã‚·ã‚§ã‚¤ã‚¯ãŒè¡Œã‚ã‚Œã¦ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãŒç¢ºç«‹ã•ã‚Œã¾ã™ã€‚ (1)SYNãƒ‘ã‚±ãƒƒãƒˆ æœ€åˆã«ã€ãƒ•ãƒ©ã‚°ãŒã€ŒSYNã€ã®ãƒ‘ã‚±ãƒƒãƒˆã‚’é€ä¿¡ã—ã¾ã™ã€‚ (2)SYNãƒ»ACKãƒ‘ã‚±ãƒƒãƒˆ æ¬¡ã«ã€ç›¸æ‰‹ãƒ›ã‚¹ãƒˆã‹ã‚‰ãƒ•ãƒ©ã‚°ãŒã€ŒSYNãƒ»ACKã€ã®ãƒ‘ã‚±ãƒƒãƒˆãŒè¿”ä¿¡ã•ã‚Œã¾ã™ã€‚ (3)ACKãƒ‘ã‚±ãƒƒãƒˆ æœ€å¾Œã«ã€ãƒ•ãƒ©ã‚°ãŒã€ŒACKã€ã®ãƒ‘ã‚±ãƒƒãƒˆã‚’é€ä¿¡ã—ã¾ã™ã€‚ â– ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ç¢ºç«‹å¤±æ•— ç›¸æ‰‹ãƒ›ã‚¹ãƒˆã®æº–å‚™ãŒã§ãã¦ã„ãªã„å ´åˆã€RESãƒ»ACKãƒ‘ã‚±ãƒƒãƒˆãŒè¿”ã•ã‚Œã¦ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ç¢ºç«‹ã¯å¤±æ•—ã—ã¾ã™ã€‚ (1)SYNãƒ‘ã‚±ãƒƒãƒˆ æœ€åˆã«ã€ãƒ•ãƒ©ã‚°ãŒã€ŒSYNã€ã®ãƒ‘ã‚±ãƒƒãƒˆã‚’é€ä¿¡ã—ã¾ã™ã€‚
mogwaing 2011/12/21
3-way handshake ã‚ˆãã¾ã¨ã¾ã£ã¦ã„ã‚‹

network

tcp
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NoRouteToHostException
mogwaing 2011/12/18
Cannot assign requested address ã«å¯¾ã™ã‚‹è§£æ±ºç–

linux

network

socket
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