Free ACA-Database – ACA Database Certification Practice Test Question

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  Simplicity for queries

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  Simplicity in structure: presents the database as a set of virtual tables specific to particular users or groups of users

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  Easier for data visualization

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  Stabilization of information: presents a consistent, unchanged image of the database structure
  
  
  

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  The source and destination database must use the same database engine

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  The source and destination database must both have a database user which DTS can use

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  If the source database is not on Alibaba Cloud, it must be Internet accessible so that
  DTS can connect to it

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  DTS is designed for file synchronization
  
  
  

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  When you purchase a PolarDB cluster, you don't need to specify the storage capacity you want to purchase

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  PolarDB supports both OLTP and OLAP scenarios very well

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  The PolarDB database engine won't require you to replicate data when adding read-only nodes

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  ApsaraDB for PolarDB uses the pay-as-you-go billing method, therefore you only need to pay for the storage resources you actually use
  
  
  

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  DMS

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  Data Works

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  MaxCompute

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  QuickBl
  
  
  

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  JSON

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  Array

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  String

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  Cube

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  Range

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  JSONB

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  GIS
  
  
  

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  Makes it easy to do business anywhere.

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  Makes data secure and independently managed.

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  Makes large amounts of data easier to process.

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  Makes data accessible online and in real time.
  
  
  

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  ApsaraDB for PolarDB is a cloud-native relational database service that is compatible with the MySQL, PostgreSQL, and Oracle engines

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  Each ApsaraDB for PolarDB cluster supports up to 100 TB of storage space and can handle up to one million queries per second (QPS)

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  ApsaraDB for PolarDB can scale clusters within a few minutes, recover from failures within a few seconds, and guarantee data consistency

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  An ApsaraDB for PolarDB cluster can also be scaled out to a maximum of 16 nodes, and provide up to 6 times of performance improvement traditional MySQL clusters at a
  30% to 50% cost reduction

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  ApsaraDB for PolarDB is designed to handle large amounts of sequential queries
  
  
  

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  A PolarDB cluster contains one primary instance and up to 15 read-only instances

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  PolarDB consolidate compute processes and storage processes in one box, allowing the database capacity to scale up and down to meet your application needs in Alibaba Cloud

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  Read/write splitting is enabled for PolarDB clusters by default, providing transparent, highly available, and self-adaptive load balancing for your database

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  High speed network connection is enabled between the DB server and the chunk server, and data are transferred using the Remote Direct Memory Access (RDMA) protocol
  
  
  

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  Oracle

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  DB2

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  Teradata

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  Redis
  
  
  

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  ApsaraDB for MyBase supports resource over commitment.

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  Instances can be migrated. You can manually migrate instances to idle hosts.

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  Isolated hosts are used. A host runs only your instances and does not run instances of other users.

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  ApsaraDB for MyBase allows you to distribute different types of instances at a time.