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sunlaobo's Projects

alibaba-mom icon alibaba-mom

2015 ali中间件比赛项目,1. 通信模块: 涉及到了消息架构设计,每一个主题分配1-2个队列,这个是可以横向增加,考虑到了一个主题有多个消费者订阅,而且还有过滤条件,为了负载均衡,对应的队列投递消息是根据随机数对队列数取膜完成的。以上是内存队列。 2. 持久化系统:因为考虑到机器坏掉,broker不可用等等原因导致的消息丢失,就需要每次收到的消息必须及时落盘,这个就是比赛优化的重中之重。为此设计了一个小型的文件系统,借鉴阿里的rocketmq. 用一个大的日志文件,一般1G大小每个,和内存队列的结构映射到实体队列。整个日志文件是顺序文件,每条消息固定大小,里面有对应的队列号,消息号,还有长度等等。这个方便恢复消息到实体队列用的。 同步刷盘,异步刷盘,持久化必须可靠,所以一般是同步刷盘到日志文件,日志文件定时异步刷盘到实体队列,实体队列里面是索引,消息的本体在日志文件里面。为了加快大面积的写入速度,用了内存映射:内存映射文件首先将外存上的文件映射到内存中的一块连续区域,被当成一个字节数组进行处理,读写操作直接对内存进行操作,而后再将内存区域重新映射到外存文件,这就节省了中间频繁的对外存进行读写的时间,大大降低了读写时间

awesome-shell icon awesome-shell

A curated list of awesome command-line frameworks, toolkits, guides and gizmos. Inspired by awesome-php.

baiduyuncrack icon baiduyuncrack

iOS百度云盘 破解速度限制、去广告、去更新 无需越狱~

bilibili-html5 icon bilibili-html5

BiliBili站外黑科技,视频源替换,原生Html5播放器。提供大部分功能

blog icon blog

博客上相关的代码

bouncer icon bouncer

Bouncer is a network TCP port redirector/forward proxy (like rinetd) with extra features like Reverse tunneling (like ssh -R), SSL tunneling (like stunnel), connection Failover, LoadBalancing and Clustering. In pure Java (BIO)

canal_mysql_nosql_sync icon canal_mysql_nosql_sync

基于canal 的 mysql 与 redis/memcached/mongodb 的 nosql 数据实时同步方案 案例,canal client

cat icon cat

Central Application Tracking

create_ap icon create_ap

This script creates a NATed or Bridged WiFi Access Point.

database icon database

Key-Value/Document store database library with btree and ARTree indexing methods

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