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 94
The PSFS filesystem does not migrate processes from one server to
another. If you want processes to be spread across servers, you will need
to take the appropriate actions.
Journaling Filesystem
When you initiate certain filesystem operations such as creating, opening,
or moving a file or modifying its size, the filesystem writes the metadata,
or structural information, for that event to a transaction journal. The
filesystem then performs the operation.
If a server using the filesystem should crash during an operation, the
journal is replayed and any journaled operations in progress at the time
of the crash are completed. This procedure ensures that the structure of
the filesystem is consistent. Users on other servers will experience only a
slight delay in filesystem operations during the recovery.
Server Registry
HP Clustered File System uses a registry to control server access to PSFS
filesystems on the SAN disks imported into the cluster. A server is added
to the registry when it mounts its first PSFS filesystem.
NOTE: This registry is different from the Windows registry. The HP
Clustered File System registry is used only for PSFS filesystem
control and is located on the membership partitions on shared
disk.
Under normal operations, a server remains in the registry until you shut
it down or remove it from the cluster. However, if a server crashes or
loses communication with the cluster and that server is in the registry
(indicating that it had active PSFS mounted volumes), HP Clustered File
System will remove the server’s access to the filesystems. When this
situation occurs, an alert will appear on the HP CFS Management
Console,
NOSAN will be reported for the server, and a message will be
written to the HP Clustered File System event log. You will need to reboot
the server to restore its access.
After the server is rebooted and rejoins the cluster, it is deleted from the
registry. When the server again mounts a PSFS filesystem, it will be
added back into the registry.