HP StorageWorks Clustered File System 3.6.0 Windows Storage Server Edition Administration Guide (403103-005, January 2008)
Table Of Contents
- Contents
- HP Technical Support
- Quick Start Checklist
- Introduction to HP Clustered File System
- Cluster Administration
- Administrative Considerations and Restrictions
- Tested Configuration Limits
- Volume and Filesystem Limits
- User Authentication
- Start the Management Console
- Cluster Management Applications
- The HP CFS Management Console
- View Installed Software
- Start HP Clustered File System
- Stop HP Clustered File System
- Back Up and Restore the Cluster Configuration
- HP Clustered File System Network Port Numbers
- Configure Servers
- Configure Network Interfaces
- Configure the SAN
- Configure Dynamic Volumes
- Configure PSFS Filesystems
- Manage Disk Quotas
- Manage Hardware Snapshots
- Configure Security Features
- Configure Event Notifiers and View Events
- Overview
- Install and Configure the Microsoft SNMP Service
- Cluster Event Viewer
- Configure Event Notifier Services
- Select Events for a Notifier Service
- Configure the SNMP Notifier Service
- Configure the Email Notifier Service
- Configure the Script Notifier Service
- View Configurations from the Command Line
- Test Notifier Services
- Enable or Disable a Notifier Service
- Restore Notifier Event Settings to Default Values
- Import or Export the Notifier Event Settings
- Using Custom Notifier Scripts
- Cluster Operations on the Applications Tab
- Configure Virtual Hosts
- Configure Service Monitors
- Configure Device Monitors
- Advanced Monitor Topics
- SAN Maintenance
- Other Cluster Maintenance
- Management Console Icons
- Index
Chapter 9: Configure PSFS Filesystems 96
Disk Quotas
Disk quotas are enabled or disabled at the filesystem level. When quotas
are enabled, the filesystem performs quota accounting to track the disk
use of each user having an assigned disk quota.
When you create a filesystem and enable quotas, you can also set options
including the default hard and soft limits for users on the filesystem. A
hard limit specifies the maximum amount of disk space in the filesystem
that can be used by files owned by the user. A soft limit is typically set
below the hard limit and triggers a warning when it is reached.
If you choose to enforce hard limits, when a file owner reaches the hard
limit, the filesystem will not allow the owner to create files or increase the
size of an existing file; any attempts to allocate more space will fail. The
file owner will need to remove files or reduce their size until the disk
usage falls below the hard limit.
Crash Recovery
When a server using a PSFS filesystem either crashes or stops
communicating with the cluster, another server in the cluster will replay
the filesystem journal to complete any transactions that were in progress
at the time of the crash. Users on the remaining servers will notice a slight
delay while the journal is replayed. Typically the recovery procedure
takes only a few seconds. The recovery process restores only the
structural metadata information. Any regular file data in the blocks that
were in use when the crash occurred may be corrupted or lost.
The server that crashed or lost communication with the cluster will not be
able to access the filesystem until it is rebooted.
Differences Between HP Clustered File System and
Microsoft Utilities for Volumes and Filesystems
The HP Management Console or HP Clustered File System commands
(for example, the mx commands) should be used to create dynamic
volumes and PSFS filesystems, to assign (or remove) drive letters or
mount points for a filesystem, and to view properties and status.