Disaster recovery series (II) -- enterprises' one-stop disaster recovery construction with the help of cloud platform?

As the business demands more and more Sustainability , Many enterprises on the cloud cross AZ Or there are strong demands for disaster recovery construction in multiple regions . After internal evaluation, the enterprise selects the overall direction of disaster recovery construction , I.e. double living in the same city ; The scheme needs to be verified , Including component disaster tolerance capacity building , Data synchronization and handover verification . It usually takes a lot of time to build and verify the disaster tolerance capability of components , If the test does not meet expectations , Previous research 、 The deployment and testing labor and time costs are quite expensive . So with the help of cloud platform capabilities “ "One-stop" work style ” Improve system disaster tolerance capability , Help enterprises reduce costs and increase efficiency .

This paper also has the advantages of platform disaster tolerance capacity construction 、 The typical cloud disaster recovery scheme and one-stop construction are described in detail .

1. Advantages of cloud platform disaster recovery construction

Effectively improve the efficiency of disaster recovery construction with the help of cloud platform capabilities , At the same time, it can reduce the construction cost .

1） Reduce the technical threshold of disaster recovery construction . Core products on the cloud have disaster tolerance capabilities across regions or availability zones , Reduce the dependence and research of enterprises on many open source solutions , At the same time, you can also get the cloud products SLA Guarantee of stability .

2） Components HA Switching capacity building . Across regions or on the cloud platform AZ fault , Both support automatic switching ; No need for enterprise to component HA Automatic detection and switching capacity building and subsequent maintenance costs .

3） Data synchronization stability guarantee . The stability of data synchronization is self-evident for disaster recovery construction , There are mature data synchronization tools on the cloud and cross region or AZ Level instance ; Enterprises do not need to maintain open source community synchronization tools .

4） Monitoring and alarm capacity building . On the cloud AZ Or regional instances have supporting monitoring alarms .

5） Reduce the labor cost of enterprises . Convenient operation on the cloud through the console , One stop disaster recovery construction ; At the same time, reduce the labor cost of community open source software maintenance and secondary development .

2. Cloud platform disaster recovery solution

2.1 Double living in the same city （ Just write ）

City wide double living single writing , It is less dependent on business , Compared with the double write database, it is more business dependent , Therefore, the cloud platform is more friendly to the local dual active single write scheme . Take Tencent cloud for example , Build the overall business deployment architecture of database write only for local dual activity ：

Double living in the same city （ Just write ）

2.2 Remote disaster recovery

Remote disaster recovery mainly meets the data security needs of customers . Take Tencent cloud for example , Build the overall architecture of remote disaster recovery ：

Remote disaster recovery

3. One stop construction of disaster recovery capability

Overview of cloud disaster tolerance capability , Take Tencent cloud as an example ：

product	Multiple zone instances	Multi region instances
CLB	1. The console supports the purchase of multiple zone instances . 2. single AZ example Upgrade not supported Multiple zone instances . If the client is to CLB Of vip There is a case of death , It is recommended to schedule the domain name for the service . 3. Official statement ：https://cloud.tencent.com/document/product/214/8093	It is recommended to purchase public network portals in different regions CLB
CVM	The same business AZ Yes CVM Conduct affinity disaggregation , Use the replacement group function to reduce the impact of host failure on the business	Same as left
ckafka	1. The console supports the purchase of multiple zone instances , Direct purchase of new businesses . 2. single AZ example I won't support it Upgrade the instance of multiple zones , It needs to be right here ckafka Data migration to multiple availability zones . Migration reference https://cloud.tencent.com/document/product/597/17272 3. Official statement ：https://cloud.tencent.com/document/product/597/52786	Use ckafka connecntor Data synchronization between regions , At present, Tencent cloud can pass api To operate , The console does not support .
tdmq	tdmq Naturally, it has the ability to span az Disaster resilience	Different regions can synchronize data through asynchronous replication
es	1. The console purchases instances of multiple zones , Direct purchase of new businesses . 2. single az Instance consoles support the upgrade to cross availability zone capability . 3. Official statement ：https://cloud.tencent.com/document/product/845/35551	1.es Community ccr The official scheme synchronizes data between regions 2.es Version for 6.7 above , It is also a platinum version
redis	1. For new instances , Purchase multiple zone instances directly on the console . 2. For stock orders az example , Upgrade by adding copies of different zones on the console 3. Current span az example , Copy read-only is not currently supported . 4. Official statement ：https://cloud.tencent.com/document/product/239/51090	redis Global replication is currently under internal testing , To go online
cdb	1. The console purchases instances of multiple zones , Direct purchase of new businesses . 2. single az Instance consoles support the upgrade to cross availability zone capability . 3. Official statement ：https://cloud.tencent.com/document/product/236/8459	The console supports remote disaster recovery instances
tdsql	1. The console purchases instances of multiple zones , Direct purchase of new businesses . 2. single az The instance internal work orders can be upgraded to cross availability zones .	The console supports remote disaster recovery instances
cos	1. Beijing & New in Guangzhou cos The console already supports multiple az Deployment instance . 2. Stock list az bucket , Copy to multiple through buckets az bucket , Reference resources ：https://cloud.tencent.com/document/product/436/38227	Realize data synchronization through remote replication