4 Things You Can Do with Alibaba Cloud PolarDB-阿里云开发者社区

开发者社区> 芷沁> 正文

4 Things You Can Do with Alibaba Cloud PolarDB

简介: In this article, we spoke with He Jun, Alibaba Cloud Technical Expert, to learn about the key features and common use cases of PolarDB.
+关注继续查看

During the PolarDB session of the 2017 Computing Conference, Alibaba Cloud's high level Technical Expert He Jun delivered a speech on the features and common use cases of PolarDB. In his speech, He Jun discussed the structure of PolarDB, introduced its features, and finally shared insights on some common use cases.

The following sections highlights the main points from his speech.

Product Architecture

I was pleasantly surprised when I first encountered PolarDB, as in my understanding, it represents a cross-generational milestone product that combines innovations in computing, storage, networking, and more. It implements a new design concept called Cloud Native, which is far different from the database design concepts we spoke about before. The earliest relation to modern databases is the relational database produced by the computing power available in the IT era. However, while moving computing capability onto the publicly accessible cloud and connecting it to user businesses generated a number of new innovations, they are far from sufficient in the long term. Why? Today, we are required to develop a cloud-based relational database targeted at public cloud environments and the user businesses that run in them. This is no small task.

PolarDB utilizes a structure that separates computing and storage, which is much easier said than done. The reason for combining computing and storage, after all, is to improve performance. The primary consideration in building a relational database is performance, so while separating storage and computing seems like an easy concept, actually doing it without sacrificing performance is quite difficult.

Today, the separation of computing and storage in PolarDB is a bold innovation that's no longer stuck in the concept phase, but has been both realized and implemented. Where is the difficulty in building a relational database? It needs to be compatible with ACID semantics, otherwise it will be unable to support business situations that require online operations. If ACID compatibility, performance, and flexibility on the public cloud are all crucial, then we also need to take into consideration performance to cost ratio. Looking at commercial databases on the market, most of them are more or less a fantasy. Is it even possible to combine all required functionality, capability, and acceptable performance to cost ratio in a framework that sufficiently supports all necessary business scenarios? We have, through superior understanding of business applications and accumulated experience on the public cloud, implemented a single write multiple read database framework to significantly simplify the complexity of previous multiple write databases. Furthermore, we are able to satisfy the needs of the vast majority of use cases. We have implemented a proprietary distributed storage engine as the core of our arsenal, allowing PolarDB to provide flexibility on multiple dimensions.

1

The system has three layers, as we can see in this figure. The top layer is DBserver, which implements a single master, multiple slave framework whereby other nodes are able to expand or contract as needed to support any request. The lowest layer is distributed, fast storage devices.

PolarDB Features

What makes PolarDB special? First, a relational database absolutely must have high performance. If a relational database has poor performance, it will have difficulty satisfying the need to process the explosive growth of data characteristic of the current Internet era. So when I say that PolarDB performance is high, what exactly does that mean?

  • High speed Single Point QBS can easily reach 500,000
    Because PolarDB uses shared distributed storage, performance when adding a new read-only node is quite high, and when sharing data, we don't have to add a new read-only instance and replicate the data. This reduces overhead from replicating data, as adding a new read-only instance only takes 1-5 minutes. It is also completely unaffected by the size of the data in the database. What's more, with a single master multiple read structure, we are able to keep latency down to a matter of milliseconds. We can also create backups in seconds. Each of these functions features extremely high performance.
  • Super high capacity
    Using data to a certain point, it seems that once the size reaches around 2TB most databases become useless. Today, PolarDB is capable of providing capacity of up to 100TB, which, from the perspective of relational frameworks, is an enormous amount of data.
  • Automatic scaling according to necessity
    The PolarDB data structure makes full use of the flexibility offered by the cloud, enabling the system to scale flexibly according to changes in the user's application.
  • MySQL compatibility
    There are already more open source database instances combined than Oracle instances, and this trend is increasing every year. We are already nearing 100% compatibility, and will continue to improve support for SQL standards as quickly as possible.
  • High reliability and availability
    PolarDB uses a one master many slaves framework, which naturally offers high availability. If the master node crashes, it will automatically be directed to the command node. At the same time, the existence of multiple data copies means that the data is naturally more reliable.

PolarDB in Production Scenarios

2

When talking about the capabilities of PolarDB as a product, remember that the birth of a product, its value, and its reputation, are all dependent on the services it provides. If users don't use it and it doesn't solve pain points in their application scenarios, then it's difficult to say that the product has any value at all. For a user on the public cloud, the product must first take into consideration whether or not a cloud database can solve the user's needs. If I have a new service, or even an existing service that I want to move to the cloud, then I want to use a database with a high performance to cost ratio, and it should be a next gen database. Moving my data to the cloud involves the cost of migrating all of my users to the cloud as well.

This migration cost is quite low if all users are very easy to migrate. However, if migrating users involves changing business procedures, then the process becomes quite painful and brings with it hidden dangers according to what the user does. We have to provide strong performance if we are to satisfy the needs of high end users. From business to the cloud, I trust the public cloud, and in turn Alibaba Cloud. When you provide services 24/7, you can't afford any interruptions. As users increase, it becomes crucially important that your database be flexible enough, expandable enough to satisfy the needs of every business scenario.

Finally, data must be reliable. It is only once these needs are met that a database service is able to provide real value to the user. Next I will introduce and analyze four use cases to illustrate the capabilities and services offered by PolarDB.

Use Case 1: High Throughput Processing of Big Data

3

High throughput processing capability of large data volumes. In its earliest days, the public cloud serviced website users. As the public cloud improved and software on it continued to evolve, it gradually grew to become something very different. With the introduction of large users, medium users, and even smaller users with high growth potential, the services and data running on the cloud have become exponentially larger. We know that, in the mobile Internet era, data is used not only to solve users' needs, but it may very well become much more important, serving as a balance between supply and demand. Because of today's calculations, we know how to increase production efficiency, and as production becomes more and more efficient, so does the efficiency of user service scenarios as well as performance to cost ratios. Because we have gathered knowledge of user needs by servicing them and collecting their data, we have a much better understanding of what we need to provide. This allows us to react to changing needs and even become aware of changes in the collected data itself. Data has the possibility of changing the balance between supply and demand, which is a major contribution of the big data era. As data grows infinitely, databases become the supporting computing power that enables commercial civilization on the backend. Similarly, with the addition of data, the database requires more computing power to be able to process and utilize the data.

We utilize an architecture that separates reads and writes in order to accommodate more user processing systems. At the same time, we implement a shared storage system that allows us to provide storage of over 100TB and respond to the explosive growth of web-scale data.

Use Case 2: High Availability and Business Flexibility

4

A few years ago, when I was a developer, I was involved in developing high availability software. At the time, we wanted to install open source MySQL with two single nodes, purchase another piece of high availability software, and learn how to configure it in order to make the LAMP architecture highly available on two machines. Today, on the public cloud, we can use technology at a lower cost, and use it to serve more users cheaply. The value brought by the cloud is enormous.

Looking at this image, we see that when the CPU and memory on a computing node in PolarDB is insufficient, we can quickly and easily expand accordingly. Today we can use a shared storage framework to scale up or scale in. When there aren't many read tasks, we can even delete some read nodes. Because of today's competition, marketing, and changes in the Internet ecology, the time frame for our services could be reduced to a matter of hours or even minutes. For example, in e-commerce you sometimes have to deal with bid sniping, where data could surge in just an hour. However, if we're able to add a read-only node each minute, this kind of load poses much less of a problem.

Use Case 3: Cloudification and Migration

5

When something new and more advanced comes on the market, we naturally want to give it a try, but that becomes quite difficult if we have to change our business processes. If we have MySQL compatibility, then putting our business on the cloud is quite simple. Then, if we use cloudification tools and perform logical migration, then the entire cloudification and cloud migration process is quite smooth.

Today we have already entered an age of cloud computing, IoT, and artificial intelligence. Before, we used to say that the Internet would move from online to offline, maybe some traditional businesses would move to the cloud, and maybe artificial intelligence would open up new forms of business. It's possible that industry + the Internet will embrace the high performance to cost ratio, flexible, easily deployable cloud. With these kinds of migration tools, issues of compatibility are easily solved and the cost of the entire process of migrating to the cloud is reduced greatly.

Use Case 4: High Reliability and Backups for Disaster Recovery

6

The last point is high reliability and backups for disaster recovery. The above diagram shows a framework diagram of PolarDB with PolarDB as a cluster architecture on the DBserver layer. For a cluster architecture, network connectivity can be considered a mission critical application service. Because of PolarDB's high reliability, it is ideal to be used for backups and disaster recovery scenarios.

Conclusion

Looking back, as I have personally come to understand PolarDB, I see it as a database product that combines imagination with creativity and adaptability. We believe that the spirit of PolarDB is one of faith combined with hard work and effort, and that is why we are able to present such a product to you all today.

版权声明:本文内容由阿里云实名注册用户自发贡献,版权归原作者所有,阿里云开发者社区不拥有其著作权,亦不承担相应法律责任。具体规则请查看《阿里云开发者社区用户服务协议》和《阿里云开发者社区知识产权保护指引》。如果您发现本社区中有涉嫌抄袭的内容,填写侵权投诉表单进行举报,一经查实,本社区将立刻删除涉嫌侵权内容。

相关文章
阿里云服务器怎么设置密码?怎么停机?怎么重启服务器?
如果在创建实例时没有设置密码,或者密码丢失,您可以在控制台上重新设置实例的登录密码。本文仅描述如何在 ECS 管理控制台上修改实例登录密码。
9959 0
阿里云服务器ECS远程登录用户名密码查询方法
阿里云服务器ECS远程连接登录输入用户名和密码,阿里云没有默认密码,如果购买时没设置需要先重置实例密码,Windows用户名是administrator,Linux账号是root,阿小云来详细说下阿里云服务器远程登录连接用户名和密码查询方法
11568 0
windows server 2008阿里云ECS服务器安全设置
最近我们Sinesafe安全公司在为客户使用阿里云ecs服务器做安全的过程中,发现服务器基础安全性都没有做。为了为站长们提供更加有效的安全基础解决方案,我们Sinesafe将对阿里云服务器win2008 系统进行基础安全部署实战过程! 比较重要的几部分 1.
9134 0
阿里云服务器如何登录?阿里云服务器的三种登录方法
购买阿里云ECS云服务器后如何登录?场景不同,阿里云优惠总结大概有三种登录方式: 登录到ECS云服务器控制台 在ECS云服务器控制台用户可以更改密码、更换系.
13711 0
腾讯云服务器 设置ngxin + fastdfs +tomcat 开机自启动
在tomcat中新建一个可以启动的 .sh 脚本文件 /usr/local/tomcat7/bin/ export JAVA_HOME=/usr/local/java/jdk7 export PATH=$JAVA_HOME/bin/:$PATH export CLASSPATH=.
4642 0
如何设置阿里云服务器安全组?阿里云安全组规则详细解说
阿里云安全组设置详细图文教程(收藏起来) 阿里云服务器安全组设置规则分享,阿里云服务器安全组如何放行端口设置教程。阿里云会要求客户设置安全组,如果不设置,阿里云会指定默认的安全组。那么,这个安全组是什么呢?顾名思义,就是为了服务器安全设置的。安全组其实就是一个虚拟的防火墙,可以让用户从端口、IP的维度来筛选对应服务器的访问者,从而形成一个云上的安全域。
7452 0
阿里云服务器如何登录?阿里云服务器的三种登录方法
购买阿里云ECS云服务器后如何登录?场景不同,云吞铺子总结大概有三种登录方式: 登录到ECS云服务器控制台 在ECS云服务器控制台用户可以更改密码、更换系统盘、创建快照、配置安全组等操作如何登录ECS云服务器控制台? 1、先登录到阿里云ECS服务器控制台 2、点击顶部的“控制台” 3、通过左侧栏,切换到“云服务器ECS”即可,如下图所示 通过ECS控制台的远程连接来登录到云服务器 阿里云ECS云服务器自带远程连接功能,使用该功能可以登录到云服务器,简单且方便,如下图:点击“远程连接”,第一次连接会自动生成6位数字密码,输入密码即可登录到云服务器上。
22340 0
+关注
芷沁
https://www.alibabacloud.com/blog/
417
文章
1
问答
文章排行榜
最热
最新
相关电子书
更多
《2021云上架构与运维峰会演讲合集》
立即下载
《零基础CSS入门教程》
立即下载
《零基础HTML入门教程》
立即下载