fed fedwatch
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| import Ember from 'ember'; | |
| export default Ember.Controller.extend({ | |
| appName: 'Ember Twiddle' | |
| }); |
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| 本文曾在“架构师之路”上发布过，近期支援Qcon-AS大会，在微信群里分享了该话题，故对原文进行重新整理与发布。 | |
| 一、秒杀业务为什么难做 | |
| 1）im系统，例如qq或者微博，每个人都读自己的数据（好友列表、群列表、个人信息）； | |
| 2）微博系统，每个人读你关注的人的数据，一个人读多个人的数据； | |
| 3）秒杀系统，库存只有一份，所有人会在集中的时间读和写这些数据，多个人读一个数据。 | |
| 例如：小米手机每周二的秒杀，可能手机只有1万部，但瞬时进入的流量可能是几百几千万。 | |
| 又例如：12306抢票，票是有限的，库存一份，瞬时流量非常多，都读相同的库存。读写冲突，锁非常严重，这是秒杀业务难的地方。那我们怎么优化秒杀业务的架构呢？ | |
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| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> | |
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| <link rel="icon" href="/otn/resources/images/ots/favicon.ico" type="image/x-icon" /> | |
| <link rel="shortcut icon" href="/otn/resources/images/ots/favicon.ico" type="image/x-icon" /> | |
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