[B! TCP][network] potato777ã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

potato777 id:potato777

TCPã¨networkã«é–¢ã™ã‚‹potato777ã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (14)

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

${{author_name}}$
{{author_name}}{{created}}
{{ #comment }}{{ comment }}{{ /comment }}
- {{ label }}

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

TCPé«˜é€ŸåŒ–ãƒ—ãƒã‚ã‚·ã€ŒAccelTCPã€ã‚’å…¬é–‹ã—ã¾ã—ãŸ : DSASé–‹ç™ºè€…ã®éƒ¨å±‹
æ˜¨å¹´æœ«ã‹ã‚‰ãšã£ã¨ã“ã‚“ãªã“ã¨ã‚’ã—ã¦ã¾ã—ã¦ã€ã“ã®æ™‚æœŸã«ãªã£ã¦ã‚ˆã†ã‚„ãä»Šå¹´åˆã®ãƒ–ãƒã‚°è¨˜äº‹ã§ã™ã€‚ é€²æ—çš„ãªã‚¢ãƒ¬ãŒã‚¢ãƒ¬ã§ã”ã‚ã‚“ãªã•ã„ã€‚ãã‚ãã‚3å¹´ç›®ã«çªå…¥ã® @pandax381ã§ã™ã€‚ RTT > 100ms ã¨ã®æˆ¦ã„ çµŒç·¯ã¯ã“ã®ã¸ã‚“ã¨ã‹è¦‹ã¦ã„ãŸã ã‘ã‚‹ã¨ã‚ã‹ã‚Šã¾ã™ãŒã€Œæ—¥æœ¬ã¨æµ·å¤–ã®é–“ã‚’çµã¶é•·è·é›¢ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ï¼ˆã„ã‚ã‚†ã‚‹Long Fat pipe Networkï¼‰ã«ãŠã„ã¦ã€é€šä¿¡æ™‚é–“ã‚’å‰Šæ¸›ã™ã‚‹ã«ã¯ã©ã†ã—ãŸã‚‰ã„ã„ã‹ï¼Ÿã€ã¨ã„ã†ã“ã¨ã‚’ã€æ˜¨å¹´æœ«ãã‚‰ã„ã‹ã‚‰ãšã£ã¨ã‚¢ãƒ¬ã‚³ãƒ¬ã‚„ã£ã¦ã„ã¾ã—ãŸã€‚ é€ä¿¡ã—ãŸãƒ‘ã‚±ãƒƒãƒˆãŒç›¸æ‰‹ã«åˆ°é”ã™ã‚‹ã¾ã§ã®æ™‚é–“ï¼ˆä¼é€é…å»¶ï¼‰ã‚’å‰Šæ¸›ã™ã‚‹ã®ã¯ã€å…‰ãƒ•ã‚¡ã‚¤ãƒãƒ¼ã®åŠ¹çŽ‡ã®ç ”ç©¶ã¨ã‹ã—ãªã„ã¨ç‰©ç†çš„ã«ç„¡ç†ãªã®ã§ã€ã“ã“ã§è¨€ã†é€šä¿¡æ™‚é–“ã¨ã¯ã€ŒTCPé€šä¿¡ã€ã«ãŠã‘ã‚‹ä¸€é€£ã®é€šä¿¡ã‚’å®Œäº†ã™ã‚‹ã¾ã§ã®æ™‚é–“ã§ã™ã€‚ ä¼é€é…å»¶ã«ã¤ã„ã¦ã¯ã€æ—¥æœ¬å›½å†…ã®ãƒ›ã‚¹ãƒˆåŒå£«ã§ã‚ã‚Œã°ã€RTTï¼ˆå¾€å¾©é…å»¶æ™‚é–“ï¼‰ã¯ã ã„ãŸã„10ã€œ30msç¨‹åº¦ã§ã™ãŒã€æ—¥æœ¬ãƒ»åŒ—ç±³é–“ã ã¨10
potato777 2014/05/02
TCP

Network
ãƒªãƒ³ã‚¯
SACSIS.TCP - HPCãƒ¦ãƒ¼ã‚¶ãŒçŸ¥ã£ã¦ãŠããŸã„TCP/IPã®è©±
HPC TCP/IP 2009 5 29 SACSIS2009 HPC TCP/IP 2 â€¢ â€¢ 1 Gbps RTT 100 â€¢ 240 Mbps â˜¹ â€¢ 940 Mbps â˜º (2) HPC TCP/IP â€¢ Ethernet PC â€¢ TCP/IP 2 10MB 3 0 200 400 600 800 1000 0 100 200 300 400 500 600 Bandwidth (Mbps) Time (msec) 160 0 200 400 600 800 1000 0 100 200 300 400 500 600 Bandwidth (Mbps) Time (msec) x3.5 (2) â€¢ TCP/IP â€¢ â€¢ MPI â€¢ TCP/IP TCP â€¢ TCP Reno [RFC2851] â€¢ TCP CUBIC Compound TCP 4 (3) â€¢ TCP/IP â€¢ T
potato777 2013/12/13
TCP

network
ãƒªãƒ³ã‚¯
Bandwidth-delay product - Wikipedia
In data communications, the bandwidth-delay product is the product of a data link's capacity (in bits per second) and its round-trip delay time (in seconds).[1] The result, an amount of data measured in bits (or bytes), is equivalent to the maximum amount of data on the network circ uit at any given time, i.e., data that has been transmitted but not yet acknowledged. The bandwidth-delay product was
potato777 2013/12/05
network

tcp
ãƒªãƒ³ã‚¯
Linuxã®TCP SYNã®å†é€é–“éš”ã®åˆæœŸå€¤ãŒ3ç§’ã‹ã‚‰1ç§’ã«å¤‰æ›´ã•ã‚Œã¦ã„ãŸ - å…ƒRX-7ä¹—ã‚Šã®é©å½“ãªæ—¥ã€…
ã¨ã„ã†ã“ã¨ã«ã€(ä»Šæ›´ï¼Ÿ)æ°—ä»˜ã„ãŸãŠè©±ã§ã™ã€‚ HAã‚’çµ„ã‚“ã éš›ã®VIPã®åˆ‡ã‚Šæ›¿ãˆãƒ†ã‚¹ãƒˆã‚’ã‚„ã£ã¦ã„ã‚‹ã¨ãã«ã€é«˜è² è·æ™‚ã¨ã‹ã¯åˆ‡ã‚Šæ›¿ãˆã«7ç§’ã´ã£ãŸã‚Šã‹ã‹ã‚‹ã‚±ãƒ¼ã‚¹ã¨ã‹ãŒã‚ã£ã¦ã€7ç§’ã£ã¦ä½•ã®æ•°å—ã ã‚ã†ã¨ç–‘å•ã‚’æŒã¡ã¾ã—ãŸã€‚ OSã¯ã€CentOS 6.4(2.6.32-358.23.2.el6.x86_64)ã§ã™ã€‚ TCP SYNã®å†é€é–“éš”ãŒã€1...2...4...ç§’ã«ãªã£ã¦ã„ã‚‹ ã§ã€tcpdumpã‚’çœºã‚ã¦ã„ã‚‹ã¨ä»¥ä¸‹ã®ã‚ˆã†ãªã‚·ãƒ¼ã‚±ãƒ³ã‚¹ã§ã™ã€‚ 11:50:35.689301 IP client-host.8957 > server-host.http: Flags [S], seq 1616681830, win 14600, options [mss 1460,sackOK,TS val 889880946 ecr 0,nop,wscale 7], length 0 11:50:36.688503 IP
potato777 2013/11/29
Linux Kernel 3.2ã§1ç§’ã«å¤‰æ›´ã•ã‚Œã¦ã„ã¦ã€CentOS6.4(or 6.3 ?)ã«ã‚‚ãƒãƒƒã‚¯ãƒãƒ¼ãƒˆã•ã‚Œã¦ã„ã‚‹ã€‚ã¨çŸ¥ã‚‰ãªã‹ã£ãŸã€‚

linux

TCP

network
ãƒªãƒ³ã‚¯
Programming UNIX Sockets in C - Frequently Asked Questions
Created by Vic Metcalfe, Andrew Gierth and other contributers (Transrated into Japanese by: Keisuke Mori)May 21, 1998 ã“ã®æ–‡æ›¸ã¯ã€UNIX ä¸Šã§ã® ã‚½ã‚±ãƒƒãƒˆã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ãƒ¼ã‚¹ã‚’ç”¨ã„ãŸ TCP/IP ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã«ã¤ã„ã¦ã€é »ç¹ã«è¡Œã‚ã‚Œã‚‹è³ªå•ã¨ãã® è§£ç”ã‚’é›†ã‚ãŸã‚‚ã®ã§ã™ã€‚ 1. ä¸€èˆ¬çš„ãªæƒ…å ±ã¨æ¦‚å¿µ 1.1 æ›´æ–°æƒ…å ± 1.2 ã“ã® FAQ ã«ã¤ã„ã¦ 1.3 ã“ã® FAQ ã¯ã©ã®ã‚ˆã†ãªäººå‘ã‘ã§ã—ã‚‡ã†ã‹? 1.4 ã‚½ã‚±ãƒƒãƒˆã£ã¦ä½•ã§ã™ã‹? 1.5 ã‚½ã‚±ãƒƒãƒˆã¯ã©ã®ã‚ˆã†ã«å‹•ä½œã™ã‚‹ã®ã§ã—ã‚‡ã†ã‹? 1.6 [ã‚ã‚‹æœ¬ã®é¡Œå] ã¨ã„ã†æœ¬ã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã¯ã©ã“ã‹ã‚‰å–å¾—ã§ãã¾ã™ã‹? 1.7 ã©ã“ã§ã‚‚ã£ã¨æƒ…å ±ã‚’å¾—ã‚‹ã“ã¨ãŒã§ãã¾ã™ã‹? 2. ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã¨ã‚µãƒ¼ãƒ(TCP/SOCK_STREA
potato777 2013/11/10
TCP

socket

network

linux

unix
ãƒªãƒ³ã‚¯
iOS 7ã§MPTCPãŒã‚µãƒãƒ¼ãƒˆã•ã‚ŒãŸè©±
iOS 7ã§MPTCP(Multipath TCP)ãŒã‚µãƒãƒ¼ãƒˆã•ã‚ŒãŸã€‚ ((Apple iOS 7 surprises as first with new multipath TCP connections)) å”çª ((ã—ã‹ã—å®Ÿã¯IETF87ã§ã€anonymous OSãŒå®Ÿè£…ã—ã¦ã„ã‚‹ã¨ã„ã†è©±ã‚‚ã‚ã‚Šã€iOS 7ãŒãã‚Œã ã£ãŸã®ã‹ã¨ç´å¾—ã—ãŸè¨³ã ãŒ))ãªã®ã ãŒåƒ•ã®åšå£«èª²ç¨‹ã«ãŠã‘ã‚‹ç ”ç©¶ãƒ†ãƒ¼ãƒžã§ã‚ã‚Šã€å…ˆã®IETFã§å¤§äººãŸã¡ã«ãƒ¡ãƒƒã‚¿ãƒ¡ã‚¿ã«ã•ã‚ŒãŸã®ã‚‚æ‚”ã—ã„ã®ã§MPTCPã«ã¤ã„ã¦èª¬æ˜Žã—ã¦ã€ä½•ãŒå‡ºæ¥ã‚‹ã‚ˆã†ã«ãªã‚‹ã‹ã‚’æ›¸ããŸã„ã¨æ€ã†ã€‚ MPTCPã¨ã¯ç°¡å˜ã«ã„ã†ã¨TCPã‚¹ãƒˆãƒªãƒ¼ãƒ ã‚’è¤‡æ•°ã®çµŒè·¯ã§è»¢é€ã™ã‚‹ã“ã¨ã«ã‚ˆã‚Šã€ã‚¹ãƒˆãƒªãƒ¼ãƒ ã®å¤šé‡åŒ–ãƒ»è€éšœå®³æ€§ã®å‘ä¸Šã‚’å›³ã‚‹ãƒ—ãƒãƒˆã‚³ãƒ«ã§ã‚ã‚‹ã€‚ ã“ã®ã‚¿ã‚¤ãƒŸãƒ³ã‚°ã§ãªãœã“ã†ã—ãŸãƒ—ãƒãƒˆã‚³ãƒ«ãŒå¿…è¦ã‹ç°¡å˜ã«èª¬æ˜Žã—ãŸã„ã€‚ åƒ•ã‚‰ãŒä½¿ã†ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã¯å¤§æŠµTCPã‚’ç”¨ã„ã¦é€šä¿¡ã‚’ã—ã¦ã„ã‚‹ã€‚ãã‚Œã¯é•·ã„ã‚¤ãƒ³ã‚¿
potato777 2013/09/24
Multipath TCP - è¤‡æ•°çµŒè·¯ã‚’ä½¿ã£ã¦ã‚¹ãƒ«ãƒ¼ãƒ—ãƒƒãƒˆã¨å†—é•·æ€§ã‚’å¾—ã‚‹ã€‚3G/Wifiã®ãƒãƒ³ãƒ‰ã‚ªãƒ¼ãƒãƒ¼ãŒã‚¹ãƒ ãƒ¼ã‚ºã«ãªã‚‹ã€‚

TCP

network
ãƒªãƒ³ã‚¯
Velocity 2013 TCP Tuning for the Web
A particle filter based scheme for indoor tracking on an Android Smartphone
potato777 2013/08/14
TCP

network
ãƒªãƒ³ã‚¯
http://eng.42go.com/websockets-vs-regular-sockets/
potato777 2013/08/06
Play/Netty + WebSocket vs TCP Socket

TCP

websocket

Network

Netty
ãƒªãƒ³ã‚¯
IBM Developer
IBM Developer is your one-stop location for getting hands-on training and learning in-demand skills on relevant techno logies such as generative AI, data science, AI, and open source.
potato777 2013/07/31
network

Socket

tcp
ãƒªãƒ³ã‚¯
ã‚ªãƒ•ãƒãƒ¼ãƒ‰ (ã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿ç”¨èªž) - Wikipedia
ã“ã®è¨˜äº‹ã¯æ¤œè¨¼å¯èƒ½ãªå‚è€ƒæ–‡çŒ®ã‚„å‡ºå…¸ãŒå…¨ãç¤ºã•ã‚Œã¦ã„ãªã„ã‹ã€ä¸ååˆ†ã§ã™ã€‚ å‡ºå…¸ã‚’è¿½åŠ ã—ã¦è¨˜äº‹ã®ä¿¡é ¼æ€§å‘ä¸Šã«ã”å”åŠ›ãã ã•ã„ã€‚ï¼ˆã“ã®ãƒ†ãƒ³ãƒ—ãƒ¬ãƒ¼ãƒˆã®ä½¿ã„æ–¹ï¼‰ å‡ºå…¸æ¤œç´¢?:Â "ã‚ªãƒ•ãƒãƒ¼ãƒ‰"Â ã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿ç”¨èªžÂ â€“Â ãƒ‹ãƒ¥ãƒ¼ã‚¹Â Â· æ›¸ç±Â Â· ã‚¹ã‚«ãƒ©ãƒ¼Â Â· CiNiiÂ Â· J-STAGEÂ Â· NDLÂ Â· dlib.jpÂ Â· ã‚¸ãƒ£ãƒ‘ãƒ³ã‚µãƒ¼ãƒÂ Â· TWL (2023å¹´6æœˆ) ã‚ªãƒ•ãƒãƒ¼ãƒ‰ã¨ã¯ã€ã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿åˆ†é‡Žã«ãŠã„ã¦ä¸»ã«ä»¥ä¸‹ã®ã“ã¨ã‚’æŒ‡ã™è¨€è‘‰ã§ã‚ã‚‹ã€‚ ã‚·ã‚¹ãƒ†ãƒ å…¥æ›¿ãªã©ã®ãŸã‚ã«ã€å®Ÿè¡Œä¸ã®ã‚¸ãƒ§ãƒ–ã‚’åœæ¢ã•ã›ã‚‹ã“ã¨ã€‚OFF-LOADã¨è¡¨ç¾ã•ã‚Œã‚‹ã€‚ ã‚ã‚‹ã‚·ã‚¹ãƒ†ãƒ ã®è² è·ï¼ˆè‹±: loadï¼‰ã‚’ä»–ã®æ©Ÿå™¨ãªã©ãŒè‚©ä»£ã‚ã‚Šã—ã¦è»½æ¸›ã™ã‚‹ä»•çµ„ã¿ã®ã“ã¨[1][æ³¨é‡ˆ 1]ã€‚ offloadã‚„offloadingã¨è¡¨ç¾ã•ã‚Œã‚‹ã€‚æœ¬é …ã«ã¦è©³èª¬ã™ã‚‹ã€‚ ã‚·ã‚¹ãƒ†ãƒ ã®å—ã‘æŒã¤æ©Ÿèƒ½ã®ä¸€éƒ¨ã‚’å¤–éƒ¨ã‚·ã‚¹ãƒ†ãƒ ã«å—ã‘æ¸¡ã™ã“ã¨ã§ã€æœ¬ä½“ã‚·ã‚¹ãƒ†ãƒ ã®è² è·ã‚’è»½æ¸›ã™ã‚‹ã“ã¨ã¯ã€ãƒ‘ãƒ•ã‚©ãƒ¼
potato777 2013/07/29
network

NIC

TCP
ãƒªãƒ³ã‚¯
TCP 3-way handshakeã®ãƒ¬ã‚¤ãƒ†ãƒ³ã‚·è»½æ¸›ã®ãŸã‚ã®TCP_DEFER_ACCEPTã‚½ã‚±ãƒƒãƒˆã‚ªãƒ—ã‚·ãƒ§ãƒ³ - ã‚†ã†ã†ããƒ–ãƒã‚°
2013/10/22 è¿½è¨˜ã—ãŸï¼Ž Starletã®ã‚³ãƒ¼ãƒ‰èªã‚“ã§ã¦listening socketã«TCP_DEFER_ACCEPTã¨ã‹ã„ã†ã‚ªãƒ—ã‚·ãƒ§ãƒ³æ¸¡ã—ã¦ãŸã®ã§ã€ã“ã‚Œä½•ã ã£ã¦æ€ã£ã¦èª¿ã¹ãŸï¼Ž TCPã«ç‰¹ã«è©³ã—ã„ã‚ã‘ã§ã¯ãªã„ã®ã§ç†è§£ã«èª¤ã‚ŠãŒã‚ã‚‹ã‹ã‚‚ã—ã‚Œãªã„ï¼Ž package Starlet::Server; ... # set defer accept if ($^O eq 'linux') { setsockopt($self->{listen_sock}, IPPROTO_TCP, 9, 1) # 9ãŒTCP_DEFER_ACCEPTã‚’è¡¨ã™ and $self->{_using_defer_accept} = 1; } ... TCP_DEFER_ACCEPTã¯Linux 2.4ã‹ã‚‰å°Žå…¥ã•ã‚Œã¦ã„ã‚‹ï¼Ž Linux 2.6.32ã‹ã‚‰æŒ™å‹•ãŒè‹¥å¹²å¤‰ã‚ã£ã¦ã„ã‚‹ã‚‰ã—ã„ï¼Ž (linux ã® TCP_DE
potato777 2013/07/28
TCP

network
ãƒªãƒ³ã‚¯
TCP Fast Open ã‚’è©¦ã—ã¦ã¿ã‚‹ - nigakyã®ãƒ–ãƒã‚°
Linux ã‚«ãƒ¼ãƒãƒ« 3.6 ã§ã¯ TCP Fast Open (TFO) ã¨ã„ã†æ©Ÿèƒ½ãŒãƒžãƒ¼ã‚¸ã•ã‚ŒãŸãã†ã§ã™ã€‚è©³ã—ãã¯ä»¥ä¸‹ã® URL ã«è¨˜è¼‰ãŒã‚ã‚Šã¾ã™ãŒã€ä¸€åº¦æŽ¥ç¶šã—ãŸã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã¯ TCP ã® 3way-handshake ã‚’ç°¡ç•¥åŒ–ã—ã¦ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã‚’ã‚ªãƒ¼ãƒ—ãƒ³ã§ãã‚‹ï¼ˆSYN ã«ãƒ‡ãƒ¼ã‚¿ã‚’è¼‰ã›ã‚‰ã‚Œã‚‹ï¼‰ã¨ã„ã†æ©Ÿèƒ½ã®ã‚ˆã†ã§ã™ã€‚ TCP Fast Open: expediting web services [LWN.net] é¢ç™½ãã†ãªæ©Ÿèƒ½ãªã®ã§å®Ÿéš›ã«ä½¿ã£ã¦ã¿ã¦ã€ä½¿ã„æ–¹ã‚’ã¾ã¨ã‚ã¦ã¿ã¾ã—ãŸã€‚ æº–å‚™ ã‚«ãƒ¼ãƒãƒ« kernel 3.6 ã§ã¯ã¾ã ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆå´ã®æ©Ÿèƒ½ã—ã‹ãƒžãƒ¼ã‚¸ã•ã‚Œã¦ã„ãªã„ã®ã§ã€ã•ã‚‰ã«æ–°ã—ã„ã‚«ãƒ¼ãƒãƒ«ã‚’ä½¿ã„ã¾ã™ï¼ˆ3.7 ã§ã‚µãƒ¼ãƒå´ã®æ©Ÿèƒ½ã‚‚ãƒžãƒ¼ã‚¸ã•ã‚Œã‚‹ã‚ˆã†ã§ã™ï¼‰ã€‚ä»Šå›žã¯ git ã§å–ã£ã¦ããŸæœ€æ–° (12250d843e8489ee00b5b7726da855e51694e792) ã‚’ãƒ“ãƒ«ãƒ‰ã—ã¦ä½¿ã„ã¾ã—
potato777 2013/07/24
"ä¸€åº¦æŽ¥ç¶šã—ãŸã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã¯ TCP ã® 3way-handshake ã‚’ç°¡ç•¥åŒ–ã—ã¦ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã‚’ã‚ªãƒ¼ãƒ—ãƒ³ã§ãã‚‹ï¼ˆSYN ã«ãƒ‡ãƒ¼ã‚¿ã‚’è¼‰ã›ã‚‰ã‚Œã‚‹ï¼‰"

TCP

fast open

network
ãƒªãƒ³ã‚¯
TCPå„ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã®è¼»è¼³åˆ¶å¾¡ã®è¦³å¯Ÿ
TCPå„ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã®è¼»è¼³åˆ¶å¾¡ã®æ¯”è¼ƒ å·¥å¦éƒ¨ç¬¬äºŒéƒ¨Â æƒ…å ±é€šä¿¡å·¥å¦ç§‘Â ï¼”å¹´Â Â å®®å·Â æ¹§å¤ªéƒŽ ç›®æ¬¡ 1ï¼Žã¯ã˜ã‚ã« 1.1 TCPã®æ´å² 1.2 åºƒå¸¯åŸŸãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã®å•é¡Œç‚¹ 2ï¼ŽTCPã®ç¨®é¡ž 2.1 TCPã®è¼»è¼³åˆ¶å¾¡ 2.2 TCP Tahoe 2.3 TCP Reno 2.4 TCP New Reno 2.5 TCP Vegas 2.6 CTCP 3ï¼Žå®Ÿé¨“è¨ˆç”» 3.1 NS2 3.2 å®Ÿé¨“ã‚·ãƒŠãƒªã‚ª 3.3 å®Ÿé¨“ãƒ—ãƒã‚°ãƒ©ãƒ 4ï¼Žå®Ÿé¨“çµæžœ 4.1 TCP Tahoe 4.2 TCP Reno 4.3 TCP New Reno 4.4 TCP Vegas 5ï¼Žã¾ã¨ã‚ 6ï¼Žå‚è€ƒæ–‡çŒ® 1. ã¯ã˜ã‚ã« è¿‘å¹´ã®ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒƒãƒˆã‚’å«ã‚€ã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã§ã¯ã€é«˜é€Ÿã€åºƒå¸¯åŸŸãªå›žç·šã‚’å¿…è¦ã¨ã™ã‚‹ã‚³ãƒ³ãƒ†ãƒ³ãƒ„ã®æ™®åŠãªã©ã«ã‚ˆã£ã¦ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯å¸¯åŸŸã®å…¬å¹³ã‹ã¤åŠ¹çŽ‡çš„ãªåˆ©ç”¨ãŒæ±‚ã‚ã‚‰ã‚Œã‚‹ã‚ˆã†ã«ãªã£ã¦ããŸã€‚ãã®ä¸ã§ä¸»ã«ç”¨ã„ã‚‰ã‚Œã¦ã„
potato777 2013/07/10
TCP

Network

Window Size
ãƒªãƒ³ã‚¯
Linuxã®TCP/IPã®å®Ÿè£…ã«ã¤ã„ã¦èª¿ã¹ã¦ã¿ãŸ - nyantã®ãƒ–ãƒã‚°
çµè«– tcp_syncookies = 0 ã®å ´åˆ tcp_max_syn_backlog ã® 75% ã‚’è¶…ãˆã‚‹ half openãªã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³è¦æ±‚ãŒæ¥ãŸå ´åˆã€dropã•ã‚Œã‚‹(TCP: drop open request from [IP]/[PORT]) somaxconn ã¨ tcp_max_syn_backlogã®å°ã•ã„ã»ã†ã®å€¤ã‚’ã€ä»˜è¿‘ã®2ã®ç´¯ä¹—ã®å€¤ã«åˆ‡ã‚Šä¸Šã’ãŸæ•°å€¤ã‚’è¶…ãˆã‚‹ã¨ã€drop (TCP: Possible SYN flooding on port [PORT]. Dropping request.) tcp_syncookies = 1 ã®å ´åˆ somaxconn ã¨ tcp_max_syn_backlogã®å°ã•ã„ã»ã†ã®å€¤ã‚’ã€ä»˜è¿‘ã®2ã®ç´¯ä¹—ã®å€¤ã«åˆ‡ã‚Šä¸Šã’ãŸæ•°å€¤ã‚’è¶…ãˆã‚‹ã¨ã€cookieé€ä¿¡ (TCP: Possible SYN flooding on port [PORT]
potato777 2013/06/17
TCP

network

linux

socket
ãƒªãƒ³ã‚¯
1