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OceanStor 9000 V300R006C00 File System Feature Guide 12

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Restrictions

Restrictions

This section describes the impact of the InfoAllocator feature on system performance, restrictions on the feature application, and interaction between the feature and other features.

Impact on the System

This feature has no adverse impact on the system.

Interaction with Other Features

Table 4-6 describes the interaction between the InfoAllocator feature and other features.

Table 4-6  Interaction between the InfoAllocator feature and other features

Feature

Interaction with InfoAllocator

InfoStamper

The statistics on used quotas does not contain the snapshot files of the directory.

InfoReplicator

  • The quota and statistics information about the source directory cannot be replicated to the destination directory. To reduce the failover time, you are advised to configure InfoAllocator for the destination directory before starting replication. This configuration ensures that the source and destination directories have the same InfoAllocator settings.
  • You cannot modify the quota for a write protected destination directory. The quota can be modified after you disable write protection for the directory.
  • The quota of the source directory can be modified anytime because this directory is never write protected.

InfoScanner

You are advised not to set quotas for the isolation directory of InfoScanner. If quotas are configured for the isolation directory, no more virus-infected files can be backed up to the directory after the used storage capacity or number of files reaches the directory's hard threshold.

Application Restrictions

  • You can create quotas only for an empty directory. When creating a directory, you will get a prompt asking you to create quotas. If necessary, create quotas as soon as possible.
  • The maximum nesting depth of quota directories is 8.
  • If the quota of a directory becomes insufficient after files are written, administrators can change the quota threshold and mode.

  • When the number of quotas reaches 8192, the system cannot continue to automatically create associated quotas. In this case, a new user can write data without any limitation. Related events of alarms are generated on DeviceManager.
  • Currently, default quotas of specified directories can be used only by users. User groups cannot use the default quotas of specified directories.

  • Hard links cannot be established between two files in different directories when any or both of the two directories have quota items. The statistics on used quotas contain only target files of hard links and exclude hard link files.

  • In the cross-protocol sharing, no matter in which mapping relationship, the quota usage of UNIX or Linux users will be calculated and the associated quota of the default quota will be created for the UNIX or Linux user groups.
  • In the scenario of two quotas in different directories, if you move a directory with quotas, a message is prompted indicating that you have no permission. As a result, the directory you want to move still exists in the source path. If the client can identify the error code of the operation returned by OceanStor 9000, the directory you want to move is moved to the destination path. If the client cannot identify the error code of the operation returned by OceanStor 9000, the directory you want to move is not moved to the destination path.
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Updated: 2019-06-27

Document ID: EDOC1000122519

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