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Basic Storage Service Configuration Guide for File

OceanStor V3 Series V300R006

This document is applicable to OceanStor 2200 V3, 2600 V3, 5300 V3, 5500 V3, 5600 V3, 5800 V3, 6800 V3, 18500 V3, and 18800 V3. It describes the basic storage services and explains how to configure and manage them.
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Planning File Systems

Planning File Systems

Properly plan file systems to ensure optimal storage system performance. Table 2-11 describes major file system parameters.

Table 2-11 File system parameter planning

Parameter

Description

Capacity

Plan the capacity and quantity of file systems based on service requirements.

Quantity

Application Scenario

  • VM
  • Database
  • User-defined

File System Block Size

If Application Scenario is set to User-defined, this parameter must be specified.

Data in a file system consists of fixed-length blocks. The size of the blocks (also known as file system block size) affects disk space usage and performance. You are advised to configure the block size following the principles below:

  • Select 16 KB when the size of most files in the file system is smaller than 100 KB, the data deduplication or data compression function will be enabled, or the file size and scenarios are not specified.
  • Select 32 KB when the size of most files in the file system is between 100 KB and 1 MB.
  • Select 64 KB when the size of most files in the file system is larger than 1 MB or the file system mainly processes bandwidth-consuming large I/Os (in scenarios such as Media & Entertainment (M&E) industry, and archive and backup of large files).

Quota Tree

A quota tree is the first-level subdirectory of a file system.

In a quota tree, you can set directory quotas, user quotas, and user group quotas to manage the space utilization of the subdirectory.

Quota

A quota restricts the file quantity and storage space size in a quota tree.

Directory Quota, User Quota, and User Group Quota are available.

  • If you want to restrict the space used by files or the number of files in the root directory, select Directory quota.
  • If you want to restrict the space used by files or the number of files for a single user, select User Quota.
  • If you want to restrict the space used by files or the number of files for a single user group, select User Group Quota.

When a user or user group quota is configured, Root Quota Tree is used as the file system-level quota by default to restrict the capacity and number of files in a file system excluding quota trees.

NOTE:
  • For details about file system parameters, refer to "Creating a File System" in this document.
  • Some product models do not support quota trees or quotas. Refer to the product description specific to your product model to check whether it supports quota trees and quotas.
  • For details about how to plan value-added features, see the corresponding feature guides.
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Updated: 2019-07-12

Document ID: EDOC1000138856

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