網(wǎng)站運維

內(nèi)容概要

　　網(wǎng)絡應用牽涉到很多專業(yè)人土，而網(wǎng)站運維人員必須確保應用的每一部分在其整個生命周期中都能正常工作。當初創(chuàng)公司遭遇了未曾預期的訪問流量尖峰，或者當某個新特性導致成熟應用失效時，你就需要這樣的專業(yè)知識。在這部文章和訪談集中，網(wǎng)站運維老手theo
schlossnagle、baron schwartz和alistair
croll向這個日新月異的領域提供了他們的真知灼見。你還將學到如何使網(wǎng)站蓬勃發(fā)展的秘訣，這是來自·最大規(guī)模網(wǎng)站建?者的第一手資料。
　　 ·學習網(wǎng)站運維技能，了解這些技巧來自于經(jīng)驗而非學校教育的原因
　　 ·理解為何從應用程序和基礎設施收集統(tǒng)計數(shù)據(jù)都很重要
　　 ·為數(shù)據(jù)庫架構和規(guī)模日益增長帶來的隱患考慮通用的處理方法
　　 ·學習如何處理宕機和降級相關的人為因素
　　 ·找到在蜂擁而至的巨大流量后避免災難的方法
　　 ·問題發(fā)生后了解癥結所在，防止其再次發(fā)生

作者簡介

作者：（美國）阿爾斯帕瓦（John Allspaw） （美國）羅賓斯（Jesse Robbins）

書籍目錄

foreword
preface
1 web operations: the career
　theo schlossnagle
　why does web operations have it tough?
　from apprentice to master
　conclusion
2 how picnik uses cloud computing: lessons learned
　justin huff
　where the cloud fits (and why!)
　where the cloud doesn't fit (for picnik)
　conclusion
3 infrastructure and application metrics
　john aiispaw, with matt massie
　time resolution and retention concerns
　locality of metrics collection and storage
　layers of metrics
　providing context for anomaly detection and alerts
　log lines are metrics, too
　correlation with change management and incident timelines
　making metrics available to your alerting mechanisms
　using metrics to guide load-feedback mechanisms
　a metrics collection system, illustrated: ganglia
　conclusion
4 continuous deployment
　eric ries
　small batches mean faster feedback
　small batches mean problems are instantly localized
　small batches reduce risk
　small batches reduce overhead
　the quality defenders' lament
　getting started
　continuous deployment is for mission-critical
　applications
　conclusion
5 infrastructure as code
　adam jacob
　service-oriented architecture
　conclusion
6 monitoring
　patrick debois
　story: "the start of a journey"
　step 1: understand what you are monitoring
　step 2: understand normal behavior
　step 3: be prepared and learn
　conclusion
7 how complex systems fail
　john aiispaw and richard cook
　how complex systems fail
　further reading
8 community management and web operations
　heather champ and john aiispaw
9 dealing with unexpected traffic spikes
　brian moon
　how it all started
　alarms abound
　putting out the fire
　surviving the weekend
　preparing for the future
　cdn to the rescue
　proxy servers
?corralling the stampede
　streamlining the codebase
　how do we know it works?
　the real test
　lessons learned
　improvements since then
10 dev and cps collaboration and cooperation
　paul hammond
　deployment
　shared, open infrastructure
　trust
　on-call developers
　avoiding blame
　conclusion
11 how your visitors feel: user-facing metrics
　alistair croll and sean power
　why collect user-facing metrics?
　what makes a site slow?
　measuring delay
　building an sla
　visitor outcomes: analytics
　other metrics marketing cares about
　how user experience affects web cps
　the future of web monitoring
　conclusion
12 relational database strategy and tactics for the web
　baron schwartz
　requirements for web databases
　how typical web databases grow
　the yearning for a cluster
　database strategy
　database tactics
　conclusion
13 how to make failure beautiful: the art and science of
postmortems
　jake loomis
　the worst postmortem
　what is a postmortem?
　when to conduct a postmortem
　who to invite to a postmortem
　running a postmortem
　postmortem follow-up
　conclusion
14 storage
　anoop nagwani
　data asset inventory
　data protection
　capacity planning
　storage sizing
　operations
　conclusion
15 nonrelational databases
　eric florenzano
　nosql database overview
　some systems in detail
　conclusion
16 agile infrastructure
　andrew clay sharer
　agile infrastructure
　so, what's the problem?
　communities of interest and practice
　trading zones and apologies
　conclusion
17 things that go bump in the night (and how to sleep through
them)
　mike christian
　definitions
　how many 9s?
　impact duration versus incident duration
　datacenter footprint
　gradual failures
　trust nobody
　failover testing
　monitoring and history of patterns
　getting a good night's sleep
contributors
index

章節(jié)摘錄

版權頁：插圖：capacity planning needs, the daily resolution is fine. Adding higher resolution morethan once per day wouldn't change any of the results and would only increase theamount of time it would take to run reports or make it a pain to move the dataaround. Gathering these metrics once a day can be as simple as a nightly cron jobworking on a replicated slave database kept solely for crunching these numbers.Because we store these metrics in a database, being able to manipulate or correlatedata across different metrics is pretty straightforward, because the date is held constantacross metrics.For example, it might not be a surprise that during the holiday season, the average sizeof photo uploads increases significantly compared to the rest of the year, because of'the new digital cameras being given as gifts during that time. Because we have thosevalues, we can lay out others on the same dates. Then, it's not difficult to see howaverage upload size can increase disk space consumption （because the original sizes arelarger）, which can increase Flickr Pro subscriptions （because the limits are extended,compared to free accounts）.

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