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What is the relationship between DDS and the community version of MongoDB
DDS is a high-performance NoSQL database service provided by eSurfing Cloud based on the community version of MongoDB, which is fully compatible with MongoDB protocol. DDS provides a complete set of database solutions in disaster recovery, backup, recovery, monitoring and alarm. It can reduce management and maintenance costs, allowing you to focus on application development and business growth.
What should I pay attention to when using DDS
The use of DDS requires comprehensive consideration of security, performance, availability, and data consistency, and the reasonable configuration and management of database to ensure that applications can efficiently and stably use DDS.
• When evaluating services that have high requirements on service availability, you are advised to preferentially select the replica set and sharded cluster architecture. Replica set and sharded cluster provide higher data reliability and service availability. When the primary node goes down, other nodes can take over from the primary node to continue to provide services without affecting the read and write services on the business side.
• The ECS on the instance side is invisible to users, you only need to refer to the connection string on the Basic Information page of the instance to configure the database connection to access the database service.
• When performing unfamiliar operations on the database, it is recommended to back up the data first to facilitate data rollback.
• You do not need to perform basic database O&M, but you can pay attention to performance monitoring, such as disk and memory usage of the machine. If the specification is insufficient, you can expand the capacity to better meet business needs.
What is the availability of DDS
The availability of DDS generally refers to the ability of a database system to provide services during normal operation, and the availability of some or all of the system's functions in the event of failure or unexpected situation. DDS provides a highly available architecture of multi-node replica sets and sharded clusters. The automatic synchronization of data between cluster nodes enhances the high reliability of data and the high availability of services.
Will the instance be affected by other user instances
No. DDS is resource-isolated at the bottom of each user instance and is not affected by other user instances.
Does DDS support multi-AZ deployment
Yes, users can deploy instance nodes in multi-AZs by selecting multi-AZs on the Order Instance page.
Does it support changing VPC after successful instance creation
At present, it is not supported to change VPC after the instance is successfully created.
Does it support changing Region after successful instance creation
At present, it is not supported to change region after the instance is successfully created.
What is the Hidden node of DDS
Hidden node, i.e., hidden node, is mainly used for data backup of replica set and sharded cluster, which is not involved in the master election.