Troubleshooting and System Recovery

This section provides strategies for handling common errors and failure situations.

• Producing Data Files for System Recovery
  You can save or create several types of files that are valuable for troubleshooting.
• Diagnosing System Problems
  This section provides possible causes and suggested responses for system problems.
• System Failure and Recovery
  This section describes alerts for and appropriate responses to various kinds of system failures. It also helps you plan a strategy for data recovery.
• Recovering from Application and Cache Server Crashes
  When the application or cache server crashes, its local cache is lost, and any resources it owned (for example, distributed locks) are released. The member must recreate its local cache upon recovery.
• Recovering from Machine Crashes
  When a machine crashes because of a shutdown, power loss, hardware failure, or operating system failure, all of its applications and cache servers and their local caches are lost.
• Understanding and Recovering from Network Outages
  The safest response to a network outage is to restart all the processes and bring up a fresh data set.