High-Availability Server Products
Failover servers must communicate in order to handle resource failover. This is essential
for high-availability services. The use of a dedicated heartbeat is a common technique to
introduce some intelligence into the failover process. This is often done over a dedicated
link (LAN or serial).
Many failover solutions (like Red Hat Cluster Manager and Microsoft Wolfpack)
can use a shared SCSI of Fiber Channel disk storage array for failover communication.
Information regarding Red Hat high availability solutions for Samba may be obtained from
The Linux High Availability project is a resource worthy of consultation if your desire is
to build a highly available Samba file server solution. Please consult the home page at
Front-end server complexity remains a challenge for high availability because it must deal
gracefully with backend failures, while at the same time providing continuity of service
to all network clients.