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“K16304” — 2012/11/19 — 9:15
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72
Fault Tolerance
operation of server pools (Tuexen et al. 2002). The TCP Connection Migration (Sno-
eren et al. 2001) and Migratory TCP (M-TCP) (Sultan et al. 2002) projects provide
mechanisms for migrating and resuming a service session from an overloaded server
to a redundant backup server. A server is considered overloaded if its system re-
sources or network resources are fully utilized, but these projects do not address the
issues in determining when a server is overloaded.
SPAND maintains a shared repository of passive statistics of Internet transfers
that can be used for future transfers to choose a good server from a pool (Seshan et
al. 1997). Smart Clients use downloaded portable code to handle server selection ...