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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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Overview

Overview

Hypertext Transfer Protocol (HTTP) is one of transfer protocols at the application layer. It is used to transfer hypertext from servers to local clients.

HTTP

Hypertext Transfer Protocol (HTTP) is a protocol for transferring hypertext from web servers to local clients. It improves working efficiency of browsers and reduces data transfer latency on networks. With the protocol, computers can properly and quickly transfer hypertext and determine hypertext contents that need to be transferred and firstly displayed. HTTP works based on the Client/Server architecture. Servers provide hypertext contents for other computers. A client sends an HTTP request to a specified port (port 80 by default) of a server using a browser to access the hypertext contents.
NOTE:

If HTTP Over SSL (HTTPS) is used to access a server, the default service port is port 443.

OceanStor 18500 V3/18800 V3 supports HTTP and HTTPS protocol. When the HTTP service is enabled in the storage system, a client can use HTTP or HTTPS protocol to access hypertext contents in the storage system.

WebDAV

Web-based Distributed Authoring and Versioning (WebDAV) is a communication protocol based on HTTP 1.1 and allows clients to release, lock, and manage web resources.

OceanStor 18500 V3/18800 V3 supports DAV. When DAV is enabled in the storage system, the WebDAV client can be used to manage HTTP shares in the storage system.

File system quota

OceanStor 18500 V3/18800 V3 storage system support file system quota. A file system quota can restrict resource usage. There are three types of quotas: Directory quota, User quota, and User group quota.
  • Directory quota: Restricts the maximum available space or number of all files in a directory. The storage system supports the default directory quota. The default directory quota indicates a quota value that takes effect for all quota trees in a file system. After configured the default quota, if a directory quota is not configured for a newly created quota tree, the system enables the quota tree to use the default quota to restrict the available space and number of files.
  • User quota: Restricts the space or number of files that can be used by a user. The storage system supports the default user quota. The default user quota indicates a quota value that takes effect for all users in a file system or quota tree. After configured the default quota, if a user quota is not configured for a user, the system enables the user to use the default quota to restrict the available space and number of files.
  • User group quota: Restricts the space or number of files that can be used by a user group. The space or number of files used by all members in a user group cannot exceed the user group quota. The storage system supports the default user group quota. The default user group quota indicates a quota value that takes effect for all user groups in a file system or quota tree. After configured the default quota,if a user group quota is not configured for a user group, the system enables the user group to use the default quota to restrict the available space and number of files.
When a user or user group quota is configured, Root Quota Tree is used as the file system-level quota by default and the capacity and number of files in a file system are restricted with the exception of quota trees.
The following two quota types are involved in each preceding quota type.
  • Space Quota: maximum capacity of quota tree in a file system
  • File Quantity Quota: maximum number of files under quota tree in a file system
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Updated: 2019-08-14

Document ID: EDOC1000084098

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