Problems:
———————-
Performance
redundancy

Technology:
———————-

MemCacheD

CARP
- ucarp
- fires virtual ip up/down
- takes a couple seconds
- dead simple

Heartbeat
- does not always fail over properly

pf/pfsync

mod_proxy
- looking at adding support for mod_perl for scripting

perlbal

Alteon

cfengine

SQL:
pgcluster

mysqlcluster
- cannot add and remove nodes at runtime
- only 254 nodes (clients or data sources) - hard limit

Anycast:
-

Misc:
———————–