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File Access and Protocols Feature Guide 13

OceanStor 18500 V3 and 18800 V3 Mission Critical Storage System V300R003

This document describes the implementation principles and application scenarios of the NAS feature. Also, it explains how to configure and manage NAS.
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Impact and Restrictions

Impact and Restrictions

This section describes the CIFS feature in terms of supported protocol versions, network requirements, dependency on other features, and impact on system performance.

Supported Protocol Versions

The storage system supports SMB 1.0, SMB2 (SMB 2.0 and SMB 2.1) and SMB 3.0.

Network Requirements

The CIFS feature supports the IPv4 and IPv6 network access protocols.

Interaction with Other Features

The following table describes the relationship between the CIFS share feature and other features.

Table 3-1  Relationship between the CIFS share feature and other features

Feature

Relationship

File system snapshot

Before accessing a file system snapshot, clients must create a CIFS share for it.

NFS/FTP/HTTP share

  • File systems can be shared using multiple protocols. In multi-protocol sharing mode, a file in a file system cannot be written concurrently. Configure read-write sharing based on one protocol and read-only sharing based on the other protocols.
    NOTICE:

    A file in a file system that written concurrently in multi-protocol sharing mode will cause data loss, exercise caution when using it.

  • If NFS and CIFS shares are used together and the same file system is operated, restrictions exist in user convergence, lock convergence, permission convergence, and link convergence. Evaluate the scenario based on actual conditions.
  • The software that are tightly coupled (audit logs, NT encryption, NT compression, void files, and symbol connections) with NTFS is not supported.

System Impact

File systems can be shared in NFS, CIFS, FTP and HTTP modes at the same time. When clients concurrently access a file system using different protocols, the overall performance slightly decreases.

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Updated: 2019-08-14

Document ID: EDOC1000084098

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