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E-MapReduce:Introduction to SmartData versions 2.6.0-2.7.2

Last Updated:Jun 16, 2026

SmartData versions 2.6.0 to 2.7.2 introduce major features and performance optimizations, including Tablestore and Raft backend storage for the Namespace service, high availability (HA) for the Namespace service, improved read and write performance, and enhanced block storage and cache modes.

Upgrades to metadata service backend storage

In addition to the original RocksDB solution, these versions introduce Tablestore and Raft as backend storage solutions for cloud-based metadata management.

If you use cache mode and do not require high-performance metadata storage or HA, the default RocksDB solution is simple, practical, and efficient. The Tablestore and Raft solutions provide HA for the metadata service by running multiple Namespace services.

Optimized usage modes

SmartData supports two usage modes:

Permission support

In block storage mode, two types of file system permissions are supported:
  • Unix permissions: Files are assigned 777 permissions.
  • Ranger permissions: Supports advanced configurations such as path wildcard characters.

For more information about permissions, see JindoFS permissions.