June 2005
Intermediate to advanced
1100 pages
30h 27m
English
book
IBM Tivoli Storage Manager in a Clustered Environment
by Roland Tretau, Dan Edwards, Werner Fischer, Marco Mencarelli, Rosane Goldstein Golubcic Langnor, Maria Jose Rodriguez Canales
Content preview from IBM Tivoli Storage Manager in a Clustered Environment
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Chapter 16. The VERITAS Cluster Server for AIX 709
Low latency transport (LLT): Low latency transport operates in kernel
space, supporting communication between servers in a cluster, and handles
heartbeat communication. LLT runs directly on top of the DLPI layer in UNIX.
LLT load balances cluster communication over the private network links.
A critical question related to cluster communication is, “What happens when
communication is lost between cluster servers?” VCS uses heartbeats to
determine the health of its peers and requires a minimum of two heartbeat paths,
either private, public, or disk based. With only a single heartbeat path, VCS is
unable to determine the difference between a network failure and a system
failure. The process ...
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