Comments (7)
from spikesystem.
from spikesystem.
redis 的单机性能是 10W 的话,这里就是假设同时抢一个车次的请求量不会超过 10W 吧,这样单台 redis 也能抗住一个车次的量。
如果这个车次很热门能超过每秒 10W 的请求量,那可能也可以根据车厢再分流?一个 redis 只负责一个车厢的,这样也能抗住。
所以重点**还是用内存操作提高效率吧
from spikesystem.
感谢您的回答,我明白您的意思,但我还有一点些疑惑: 1.对于服务端根据火车车次进行均衡,这肯定没问题。 2.但对于同一辆火车,分库减票和总Redis减票相对于订单生成是原子操作(但两次减操作的顺序我不太明白),且订单的成功是以总Redis减票成功作为标志的。 我又看了一遍ReadMe,目前我是理解的是2.1的情形,不知是否正确。 对于单个分库来说: 2.1 当客户端并发请求时,会先对这个分库进行票量减逻辑,筛选出成功的请求后再请求Redis减票逻辑,总Redis减票成功后,订单成功。这样就把压力分给了单个分库。 2.2 相反的例子是,客户端并发请求时,不会先对分库的票量进行减逻辑,仅仅根据分库票量判断是否充足,然后等到Redis减票成功后,再对分库进行减票逻辑,然后生成订单。如果是这样的话,相当于进行了一个先分后总,并发会集体转移到Redis。
…
------------------ Original ------------------ From: "GuoZhaoran"<[email protected]>; Date: Wed, Nov 13, 2019 10:56 PM To: "GuoZhaoran/spikeSystem"<[email protected]>; Cc: "nol、煷"<[email protected]>;"Author"<[email protected]>; Subject: Re: [GuoZhaoran/spikeSystem] 对Redis的压力也很大吧? (#5) 真实的场景中,用户都是请求一辆火车的余票。其实服务端根据车次又做了一次均衡,不同车的余票可能hash到不同的redis中去。统一减库存对redis的压力不会太大。------------------ 原始邮件 ------------------ 发件人: "zhang570221322"<[email protected]> 发送时间: 2019年11月13日(星期三) 晚上6:31 收件人: "GuoZhaoran/spikeSystem"<[email protected]>; 抄送: "Subscribed"<[email protected]>; 主题: [GuoZhaoran/spikeSystem] 对Redis的压力也很大吧? (#5) 如果分库server的库存减和总redis库存减的操作是原子操作这个是前提的话,8点放票,此时库存都是足够的,瞬间所有的分仓库都会去请求Redis。100W并发请求,就可能有绝大多数的请求同样也会去Redis。 这个问题如何解决。单单去增加redis服务器的并发能力吗? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or unsubscribe. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.
作者的意思就是先分库减库存,没有库存就不去请求redis了,这样可以减少redis压力,如果按你说的2.2,那分库还有什么意义?
from spikesystem.
from spikesystem.
既然每次扣库存都要扣本地库存和redis库存,那本地库存的意义在哪里
from spikesystem.
既然每次扣库存都要扣本地库存和redis库存,那本地库存的意义在哪里
我感觉这样就可以把一些请求都截流在本地机器上,这样远端服务器就不必承担这部分流量。
from spikesystem.
Related Issues (15)
- 想推荐你这个项目 HOT 3
- 远程扣库存能保证数据一致性吗? HOT 3
- 优化 HOT 2
- 操作消息队列的时机 HOT 2
- lua脚本
- readme 中lua脚本判断条件写反了
- chan使用是否合理? HOT 1
- 是否漏了第一张图
- 有几点疑问 HOT 2
- 本地hash方案 HOT 2
- 代码都看了,当某台服务器挂了,上面的余票怎么重新分配到剩余服务器上,最关键的地方没写。 HOT 7
- 老黑?????
- 请问用的什么作图工具 HOT 2
- 库存量分配到本地机器机制或时机是怎样的 HOT 1
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from spikesystem.