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Security '02 Abstract
SSLACC: A Clustered SSL Accelerator
Eric Rescorla, RTFM, Inc.; Adam Cain, Nokia, Inc.; Brian Korver, Xythos Software
Abstract
We describe a clustered SSL accelerator. Although
current SSL acceleration solutions [1, 2] often employ
multiple nodes in parallel (or in series [3]) for improved
performance and resistance to single failures, the failure
of any node results in all client connections to that node
being torn down. Our implementation goes beyond this to
provide robustness against node failures at the connection
level--any proper subset of the nodes in the cluster can
fail and no effect (other than possibly performance
degradation) will be observed. This result is accomplished
by a novel combination of tight control of TCP [4] behavior
and state-sharing between cluster members. Unlike many high
availability clustering systems, ours uses commodity
hardware.
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