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nminoru 2019/02/08
NTP
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nminoru 2017/12/23
NTP
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Keeping Time With Amazon Time Sync Service | Amazon Web Services
AWS News Blog Keeping Time With Amazon Time Sync Service Today weâ€™re launching Amazon Time Sync Service, a time synchronization service delivered over Network Time Protocol (NTP) which uses a fleet of redundant satellite-connected and atomic clocks in each region to deliver a highly accurate reference clock. This service is provided at no additional charge and is immediately available in all publi
nminoru 2017/11/30
AWS

NTP
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ç±³å›½æ™‚é–“ã®2014å¹´2æœˆ10æ—¥ã€Network Time Protocolï¼ˆNTPï¼‰ã®è„†å¼±æ€§ã‚’æ‚ªç”¨ã—ãŸå¤§è¦æ¨¡ãªDDoSæ”»æ’ƒãŒç¢ºèªã•ã‚ŒãŸã€‚ç±³å›½ã®ã‚»ã‚ãƒ¥ãƒªãƒ†ã‚£ä¼æ¥ã€CloudFlareã®CEOã‚’å‹™ã‚ã‚‹ãƒžã‚·ãƒ¥ãƒ¼ãƒ»ãƒ—ãƒªãƒ³ã‚¹æ°ã®ãƒ„ã‚¤ãƒ¼ãƒˆã«ã‚ˆã‚‹ã¨ã€2013å¹´3æœˆã«è¦³æ¸¬ã•ã‚ŒãŸâ€œå²ä¸Šæœ€å¤§è¦æ¨¡â€ã®DDoSæ”»æ’ƒã‚’ä¸Šå›žã‚Šã€ãƒˆãƒ©ãƒ•ã‚£ãƒƒã‚¯ãŒã»ã¼400Gbpsã«é”ã™ã‚‹è¦æ¨¡ã ã£ãŸã¨ã„ã†ã€‚ NTPã¯ã€ã‚·ã‚¹ãƒ†ãƒ ã®å†…éƒ¨æ™‚è¨ˆã‚’æ£ã—ã„æ™‚é–“ã«åŒæœŸã•ã›ã‚‹ãŸã‚ã®ãƒ—ãƒãƒˆã‚³ãƒ«ã§ã€ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒƒãƒˆã‚’å½¢ä½œã‚‹ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯æ©Ÿå™¨ã‚„ã‚µãƒ¼ãƒãƒ¼ã€ãƒ‡ã‚¹ã‚¯ãƒˆãƒƒãƒ—ãƒžã‚·ãƒ³ãªã©ã§å¹…åºƒãä½¿ã‚ã‚Œã¦ã„ã‚‹ã€‚ ntpdãªã©NTPã®å®Ÿè£…ã®ä¸€éƒ¨ã«ã¯ã€NTPã‚µãƒ¼ãƒãƒ¼ã®å‹•ä½œãƒ¢ãƒ‹ã‚¿ãƒªãƒ³ã‚°ã®ãŸã‚ã«ã€Œmonlistã€æ©Ÿèƒ½ã‚’å‚™ãˆã¦ã„ã‚‹ã‚‚ã®ãŒã‚ã‚‹ã€‚ã“ã®æ©Ÿèƒ½ãŒã€Œæ”»æ’ƒè€…ã«ã¨ã£ã¦ç†æƒ³çš„ãªDDoSãƒ„ãƒ¼ãƒ«ã€ï¼ˆCloudFlareã®ãƒ–ãƒã‚°ï¼‰ã«ãªã£ã¦ã„ã‚‹ã¨ã„ã†ï¼ˆé–¢é€£è¨˜äº‹ï¼šå¢—å¹…æ”»æ’ƒã¯DNSã ã‘ã§ã¯ãªã„â€•â€•NT
nminoru 2014/02/13
NTP
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Linuxå¥³åéƒ¨ã€€systemdå¾¹åº•å…¥é–€
Linuxå¥³åéƒ¨ ã€ŒFedoraæœ€æ–°æŠ€è¡“æƒ…å ±ï¼†Systemdå‹‰å¼·ä¼šã€ http://connpass.com/event/3859/ ã§ä½¿ç”¨ã—ãŸè³‡æ–™ã§ã™ã€‚ å¤‰æ›´å±¥æ´ 2013/11/04 ver1.0 åˆç‰ˆ 2013/11/05 ver1.1 èª¤æ¤ä¿®æ£ã€å°‘ã—è¿½è¨˜ 2013/11/06 ver1.2 daemon-reload,mask,ãƒ†ãƒ³ãƒ—ãƒ¬ãƒ¼ãƒˆæ©Ÿèƒ½ã‚’è¿½è¨˜ 2013/11/12 ver1.3 User/Groupã‚ªãƒ—ã‚·ãƒ§ãƒ³ã®èª¬æ˜Žè¿½åŠ 2013/11/24 ver1.4 èª¤æ¤ä¿®æ£ 2014/05/05 ver1.5 imjournalãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã®èª¬æ˜Žè¿½åŠ
nminoru 2013/11/07
NTP
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Master Effective Crypto Investment Tactics to Maximize Profits Over Time
nminoru 2012/06/21
19:30é ƒã®Server Oscillator Stability Errorsã®ã‚¹ãƒ©ã‚¤ãƒ‰ã«å™´ã„ãŸã€‚15åˆ†æ¯Žã«fanãŒå‹•ãã¨ã‚¯ãƒãƒƒã‚¯ã«å¤‰å‹•ãŒã€‚

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Evaluation of IEEE1588 on Linux Ethernet Driver (PDF)
Copyright 2011 FUJITSU COMPUTER TECHNO LOGIES LIMITED Evaluation of IEEE1588 on Linux Ethernet Driver 2011.12.9 å¯Œå£«é€šã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿ãƒ†ã‚¯ãƒŽãƒã‚¸ãƒ¼ã‚º æ£®æšç”Ÿ ç®¡ç†ç•ªå· 1135ka1 ç›®æ¬¡ ï® ã¯ã˜ã‚ã« ï® èƒŒæ™¯ ï® æ™‚åˆ»åŒæœŸã®ç¨®é¡ž/æ–¹æ³• ï® IEEE1588ã¨ã¯ ï® æ¦‚è¦ ï® é©ç”¨åˆ†é‡Ž ï® Linuxã®IEEE1588å¯¾å¿œ ï® Linuxã®å¯¾å¿œçŠ¶æ³ ï® PTPï½„ã«ã‚ˆã‚‹æ™‚åˆ»åŒæœŸ ï® PTPdã®æ¦‚è¦ ï® PTPdã®å®Ÿæ–½ä¾‹ ï® ã¾ã¨ã‚ ï® ã‚ã‹ã£ãŸã“ã¨ ï® ä»Šå¾Œ Copyright 2011 FUJITSU COMPUTER TECHNO LOGIES LIMITED 1 ã¯ã˜ã‚ã« ï® èƒŒæ™¯ ï® ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã®æ™‚åˆ»åŒæœŸã§ã¯NTPãŒä½¿ç”¨ã•ã‚Œã‚‹ã“ã¨ãŒå¤šã„ãŒã€NTPã«ã‚ˆã‚‹æ™‚ åˆ»åŒæœŸã¯ãƒŸãƒªç§’å˜ä½ã§ã‚
nminoru 2012/06/09
NTP

Linux
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Thunderboltâ„¢ Technology: A Universe of Possibilities
Thunderboltâ„¢ Techno logy: The Fastest, Simplest, and Most Reliable USB-C Connection1 Thunderboltâ„¢ techno logy offers a best-in-class set of capabilities to deliver the simplest, most reliable, and fastest cable solution available for connecting to power and your favorite accessories. Thunderboltâ„¢ Techno logy: Revolutionary Connectivity Thunderboltâ„¢ techno logy is more than a USB-C connector. Although
nminoru 2012/06/08
"all the Thunderbolt products connected in a domain to synchronize their time within 8ns of each other."ã ã¨

Thunderbolt

NTP
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US20100189206A1 - Precise Clock Synchronization - Google Patents
nminoru 2012/06/07
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Patent
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GitHub - ptpd/ptpd: PTPd official source - master branch a.k.a. trunk
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session. Dismiss alert
nminoru 2012/06/07
NTP
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Endrun IEEE 1588 PTP ã‚°ãƒ©ãƒ³ãƒ‰ãƒžã‚¹ã‚¿ãƒ¼ã‚¯ãƒãƒƒã‚¯
EndRun Techno logies å‘¨æ³¢æ•°æ¨™æº– ãƒ» ã‚¿ã‚¤ãƒ ã‚µãƒ¼ãƒãƒ¼ ã‚¿ã‚¤ãƒ ãƒ™ãƒ¼ã‚¹ãƒ»å‘¨æ³¢æ•°ãƒ™ãƒ¼ã‚¹ã®å°‚æ¥ãƒ¡ãƒ¼ã‚«ãƒ¼ ã‚¨ãƒ³ãƒ‰ãƒ©ãƒ³ Endrun Techno logiesï¼ˆã‚¨ãƒ³ãƒ‰ãƒ©ãƒ³ ãƒ†ã‚¯ãƒŽãƒã‚¸ãƒ¼ã‚ºï¼‰ç¤¾ã®PTPã‚°ãƒ©ãƒ³ãƒ‰ãƒžã‚¹ã‚¿ãƒ¼ã‚¯ãƒãƒƒã‚¯ã¯ï¼ŒIEEE 1588 Precision Time Protocol (PTP)ã‚’ç”¨ã„ã¦LANçµŒç”±ã®ãƒžã‚¤ã‚¯ãƒç§’ç´šã®åŒæœŸç²¾åº¦ã‚’å®Ÿç¾ã—ã¾ã™ï¼Žç‰¹ã« Sonoma D12 GPS, CDMA ã¨ Meridian II ã¯ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã‚¿ã‚¤ãƒ ã‚¹ã‚¿ãƒ³ãƒ—æ©Ÿèƒ½ã‚’æ¨™æº–è£…å‚™ã—ã¦ãŠã‚Šï¼Œå¾Œä»˜ã‘å¯èƒ½ãª PTP ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã«ã‚ˆã‚Šé«˜æ€§èƒ½é«˜ç²¾åº¦ PTP ã‚°ãƒ©ãƒ³ãƒ‰ãƒžã‚¹ã‚¿ã‚¯ãƒãƒƒã‚¯æ©Ÿèƒ½ã‚’æœ‰åŠ¹ã«ã§ãã¾ã™ï¼Ž EndRun Techno logies è£½å“ãƒšãƒ¼ã‚¸ Sonoma PTP ç™½æ›¸ Sonoma PTP ã‚ªãƒ—ã‚·ãƒ§ãƒ³
nminoru 2012/06/07
NTP
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nminoru 2012/06/07
NTP
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Precision Time Protocol - Wikipedia
The Precision Time Protocol (PTP) is a protocol for clock synchronization throughout a computer network with relatively high precision and therefore potentially high accuracy. In a local area network (LAN), accuracy can be sub-microsecond â€“ making it suitable for measurement and control systems.[1] PTP is used to synchronize financial transactions, mobile phone tower transmissions, sub-sea acousti
nminoru 2012/05/31
NTP
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Corvil Nanosecond Latency: Technology and Monitoring (PDF)
nminoru 2012/05/29
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nminoru 2012/05/29
NTP
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[Fedora] ntpdateå®Ÿè¡Œæ™‚ã«ã€Œno server suitable for synchronization foundã€ã¨ã„ã†ã‚¨ãƒ©ãƒ¼ãŒå‡ºã‚‹ - Life with IT
ntpdateå®Ÿè¡Œæ™‚ã«ã€Œno server suitable for synchronization foundã€ã¨ã„ã†ã‚¨ãƒ©ãƒ¼ãŒå‡ºã‚‹ 2008/10/15æ›´æ–° å¯¾å¿œãƒãƒ¼ã‚¸ãƒ§ãƒ³: 9 ntpdateã§æ™‚åˆ»åŒæœŸã—ã‚ˆã†ã¨ã™ã‚‹ã¨ä»¥ä¸‹ã®ã‚¨ãƒ©ãƒ¼ãŒå‡ºã¦åŒæœŸã«å¤±æ•—ã™ã‚‹ã€‚ % sudo ntpdate timeserver no server suitable for synchronization found ã“ã‚Œã«ã¯ã„ãã¤ã‹ã®åŽŸå› ãŒè€ƒãˆã‚‰ã‚Œã‚‹ã€‚ ntpdateã«-dã‚ªãƒ—ã‚·ãƒ§ãƒ³ã‚’ä»˜ã‘ã¦å®Ÿè¡Œã™ã‚‹ã¨è©³ç´°ãªæƒ…å ±ãŒå¾—ã‚‰ã‚Œã‚‹ã®ã§ã€ãã®çµæžœæ¯Žã®åŽŸå› ã‚’ç¤ºã™ã€‚ NTPã‚µãƒ¼ãƒã‹ã‚‰ã®å¿œç”ãŒãªã„å ´åˆ % sudo ntpdate -d timeserver : Looking for host timeserver and service ntp host found : timeserver transmit(xxx.xxx
nminoru 2011/12/20
NTP
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