A Working Theory-of-Monitoring | USENIX
Caskey L. Dickson, Site Reliability Engineer, Google Inc. At Google we have discovered many common pitfalls and false simplifications that cause frustration and blind-spots with monitoring systems. Internally we have our own home-grown monitoring systems, but to move beyond the hit-and-miss approach to monitoring we have developed a formal model for such systems. This model is used as a framework
pidstatã§ãƒ—ãƒã‚»ã‚¹æ¯Žã®CPU使用率を測定
sysstatã®æœ€æ–°ç‰ˆã§ã‚ã‚‹8.0ã«ã¯pidstatã¨ã„ã†ãƒ—ãƒã‚»ã‚¹ã®çµ±è¨ˆã‚’å–å¾—ã™ã‚‹ã‚³ãƒžãƒ³ãƒ‰ãŒå«ã¾ã‚Œã‚‹ã‚ˆã†ã«ãªã£ãŸã€‚ ã¨ã‚Šã‚ãˆãš./configure && makeã—ã¦ä½¿ã£ã¦ã¿ã‚‹ã€‚ user@debian:~/sysstat-8.0.4.1$ ./configure && make user@debian:~/sysstat-8.0.4.1$ ./pidstat --help Usage: ./pidstat [ options... ] [ <interval> [ <count> ] ] Options are: [ -C ] [ -d ] [ -I ] [ -r ] [ -t ] [ -u ] [ -V ] [ -w ] [ -p { | SELF | ALL } ] [ -T { TASK | CHILD | ALL } ] user@debian:~/sysstat-8.0.4.
cybozu.com ã®ãƒ©ãƒƒã‚¯è¨è¨ˆ - Cybozu Inside Out | サイボウズエンジニアã®ãƒ–ãƒã‚°
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flapjack.io - Domain Name For Sale | Dan.com
VAT overview )Value Added TaxThe Value Added Tax (VAT) is a consumption tax applied in the European Union (EU) to all goods and services. All consumers in the EU are charged VAT on the purchase of goods and services. Businesses in the EU buying from a business in the same country are also charged VAT. Businesses in the EU buying from a business in a different EU country are not charged VAT. Consum
Stop using Nagios (so it can die peacefully)
3. Reasons for choosing Nagios •  stupid simple plugin system •  billions* of existing plugins •  years of development behind it •  you can hire people who know it "Everybody uses it."** * may not actually be true ** except me. and maybe you. and that guy at the back, who really likes Zabbix. you know who you are. 4. Reasons for choosing Nagios •  stupid simple plugin system •  billions* of existi
一時ファイルã¨dentry cacheã¨ãƒ¡ãƒ¢ãƒª - blog.nomadscafe.jp
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最近ã®ã‚³ãƒ³ãƒ”ュータã ã¨CPUã®ã‚³ã‚¢æ•°ã‚„スレッド数ãŒå¤šã„ã®ã§/proc/cpuinfoを直接èªã‚€ã‚ˆã‚Šã¾ã¨ã‚ã¦å‡ºåŠ›ã—ã¦ãれるlscpuã‚„hwlocã‚’ã¤ã‹ã£ãŸã»ã†ãŒã‚ˆã„。 最近コア数ã¨ã‹å¤šã„ã§ã™ã。デスクトップã§ã‚‚Core i7ã ã¨8スレッドã¨ã‹ã‚ã‚Šã¾ã™ã—サーãƒã ã¨4ソケット40コア80スレッドã¨ã‹ã‚ã‚Šã¾ã™ã€‚ CPUãŒã©ã†ã„ã†æ§‹æˆãªã®ã‹çŸ¥ã‚ŠãŸã„時㯠/proc/cpuinfo や /sys/devices/system/cpu/* ã‚’èªã‚€ã“ã¨ãŒå¤šã„ã§ã™ãŒè¡¨ç¤ºãŒå†—é•·ãªã®ã§ã¤ã‚‰ã„ã§ã™ã€‚ãã“ã§é©å½“ã«ã¾ã¨ã‚ã¦è¡¨ç¤ºã—ã¦ãれるコマンドãŒä¾¿åˆ©ã§ã™ã€‚ lscpuã¯CPUã®ã‚ャッシュ構æˆã¨ã‹ã€ã‚½ã‚±ãƒƒãƒˆ-コア-スレッドã®å€‹æ•°ã®é–¢ä¿‚ãŒã‚ã‹ã‚Šã¾ã™ã€‚実機ã§æ•°å›žå®Ÿè¡Œã™ã‚‹ã¨ã‚ã‹ã‚Šã¾ã™ãŒCPU MHzã®ã¨ã“ã‚ã¯å®Ÿéš›ã®å‘¨æ³¢æ•°ã«ã‚ã‚ã›ã¦ã¡ã‚‡ã„ã¡ã‚‡ã„変ã‚ã‚‹ã®ã§ã‚¢ãƒ†ã«ãªã‚Šã¾ã›ã‚“。 出力ã¯ã“ã‚“ãªã‹ã‚“ã˜: $ lscpu Archite
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specinfra をベースã¨ã—ãŸã‚ªãƒ¬ã‚ªãƒ¬ Configuration Management Tool/オレオレ serverspec 構想 - Gosuke Miyashita
specinfra v0.0.6 ã§ã¯ã€serverspec/configspec/Syllabus ã§å®Ÿè¡Œã™ã‚‹å…·ä½“çš„ãªã‚³ãƒžãƒ³ãƒ‰ã‚’ SpecInfra::Command::* ã«çµ±åˆã—ã¾ã—ãŸã€‚ 以å‰ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã¾ã§ã¯ã€ŒOS を自動判別ã—ã€OS ã«é©ã—ãŸã‚³ãƒžãƒ³ãƒ‰ã‚¯ãƒ©ã‚¹ã‚’返㙠commands ã¨å‘¼ã‚“ã§ã„るレイヤーã€ã‚’ specinfra ã§æä¾›ã—ã¦ã„ã¾ã—ãŸãŒã€ã‚³ãƒžãƒ³ãƒ‰ã‚¯ãƒ©ã‚¹ã¯å„プãƒãƒ€ã‚¯ãƒˆå´ã§å®Ÿè£…ã—ã¦ã„ã¾ã—ãŸã€‚ specinfra v0.0.6 ã§ã¯ã€ã‚³ãƒžãƒ³ãƒ‰ã‚¯ãƒ©ã‚¹ã‚‚ specinfra å´ã§æŒã¤ã‚ˆã†ã«ãªã‚Šã¾ã—ãŸã€‚ ã“ã‚Œã§ä½•ãŒã†ã‚Œã—ã„ã®ã‹ã¨ã„ã†ã¨ã€ã‚ªãƒ¬ã‚ªãƒ¬ Configuration Management Tool ãŒç°¡å˜ã«å®Ÿè£…ã§ãるよã†ã«ãªã‚‹ã€ã¨ã„ã†ã“ã¨ã§ã™ã€‚ Exec/SSH ã¨ã„ã£ãŸãƒãƒƒã‚¯ã‚¨ãƒ³ãƒ‰å®Ÿè¡Œå½¢å¼ã®åˆ‡ã‚Šæ›¿ãˆã‚„ã€OSを自動判別ã—ã¦é©åˆ‡ãªã‚³ãƒžãƒ³ãƒ‰ã‚’実行ã™ã‚‹éƒ¨åˆ†ã¯ã™ã¹ã¦ specinfr
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æ–°è¦ã‚µãƒ¼ãƒ“ス用ã®ç›£è¦–ã‚’Nagiosã‹ã‚‰sensuã«åˆ‡ã‚Šæ›¿ãˆã¦2ヶ月経ã£ãŸã®ã§ã€ 導入時ã®èª¿æŸ»ã§ç¤¾å†…ã§å…¬é–‹ã—ã¦ãŸissueã¨ã€æŠ•å…¥ã—ã¦2ヶ月間é‹ç”¨ã—ãŸè¨˜éŒ²ã‚’公開ã—ã¦ãŠã“ã†ã¨æ€ã†ã€‚ ã¨ã„ã†ã‹ä»¥å‰Sensuã®äº‹ã‚’書ãã¨å…¬è¨€ã—ã¦ã„ãŸã®ã«ã€ã™ã£ã‹ã‚Šã‚µãƒœã£ã¦ã„㦠昨日@ma0eã•ã‚“ã®ãƒ–ãƒã‚°ã‚’見ã¦ä¸‹è¨˜ã®ã‚„ã‚Šå–ã‚Šã‚’æ€ã„出ã—ã¦æ€¥ã„ã§æ›¸ã„ãŸâ€¦ @ma0e We started using it. @glidenote will report the detail soon, I think. — kentaro (@kentaro) 2013, 10月 30 @kentaro @glidenote that would be nice — Mitsutoshi Aoe/maoe (@ma0e) 2013, 10月 30 導入環境ã¯CentOS 6.4ã§ã€åˆ©ç”¨ã—ã¦ã„ã‚‹sensuã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã¯0.12.1-1ã«ãª
Application Resilience Engineering and Operations at Netflix with Hystrix - JavaOne 2013
Learn how the Netflix API achieves fault tolerance in a distributed architecture while depending on dozens of systems that can fail at any time while serving more than two billion Web service calls each day to 1000+ different devices. Topics include common patterns, production examples, and operational learnings from the way Netflix incorporates fault and latency tolerance into its distributed sys
DMM inside
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Prompt 3
The best SSH app for iOS has a companion. Prompt 3 is now available for iOS and macOS. It’s the terminal app that aims to please. Reboot some servers while surfing. Quickly tweak a website at your desk. It’s lovely, fast, and eager to save the day the moment you need it. That’s why we call it Prompt. A beloved iOS app since 2011, Prompt 2 had 4,131 reviews and a ★★★★★ App Store rating from happy u
Observability at Twitter
As Twitter has moved from a monolithic to a distributed architecture, our scalability has increased dramatically. Because of this, the overall complexity of systems and their interactions has also escalated. This decomposition has led to Twitter managing hundreds of services across our datacenters. Visibility into the health and performance of our diverse service topology has become an important d
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App::highlight - a simple grep-like highlighter app
App::highlight is a bit like grep, except that it doesn't filter out lines. In exchange for seeing all the output you get a lot more fun highlighting options to play with, and full Perl regex support of course. I gave this talk at the London.pm technical meeting in July 2013. App::highlight is available on Github and CPAN.Read less
Rotating MySQL Slow Logs Safely
This blog post is part two of two. Like part one, published Wednesday, this is a cross-post from Groupon’s engineering blog. Thanks again to Kyle Oppenheim at Groupon. In my last post, I described a solution for keeping the caches of a MySQL standby server hot using MySQL slow logs with long_query_time set to 0. Here are a some lessons we learned when logging a high volume of queries to the slow l
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Google Code Archive - Long-term storage for Google Code Project Hosting.
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