Distributed Storage

Exam objectives are the official skill domains Data Engineer (Associate) tests. Below are the official ALIBABA docs our questions on this objective cite — review them, then practise.

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Official references for this objective

Alibabacloud — Compare and select a cloud storage service - Object Storage Service - Alibaba Cloud

Shared file storage accessible by multiple compute nodes (ECS, E-HPC, ACK) over NFS or SMB NAS
Alibabacloud — Table Store Time Series Data Storage Architecture - Alibaba Cloud Community

it is very suitable to use a database such as NoSQL. Several popular open source time series databases use NoSQL database as the data storage
Alibabacloud — Alibaba Cloud OSS provides multiple storage types and features to securely store and efficiently manage massive data, supporting various application scenarios and meeting compliance requirements. - Object Storage Service - Alibaba Cloud Documentation Center

Does OSS use three-way replication? No. OSS uses erasure coding (EC) instead of three-way replication.
Alibabacloud — Block storage types and how to use block storage - Elastic Compute Service - Alibaba Cloud Documentation Center

Local SATA HDD The d3s, d2c, d2s, d1ne, and d1 big data instance families use local SATA HDDs.
Alibabacloud — What is OSS - Object Storage Service - Alibaba Cloud Documentation Center

A bucket is a container used to store objects. All objects must belong to a bucket.
Alibabacloud — Alibaba Cloud data disaster recovery best practices for storage and databases - Well-Architected Framework - Alibaba Cloud Documentation Center

Elastic Block Storage provides the replication pair-consistent group feature for unified management of asynchronous replication in disaster recovery scenarios.
Alibabacloud — OSS cross-region replication (CRR) overview - Object Storage Service - Alibaba Cloud Documentation Center

To configure CRR between a region inside and a region outside the Chinese mainland, enable transfer acceleration.