Slide
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Managing Persistent Layer
uClient/Server
ØTemporary table with supporting information
(one row per session)
(one row per session)
ØRead - from support area.
ØWrite – via the engine:
§Get action from the application
§Modify support area
§Send response to the application
uReason
ØEliminates about 75% of repeated requests
uWeb - idea
ØCreate persistent table
§Add session ID
ØEstimate system could slow down 3-5%
uWeb - real life
Ø50%-200% slower
(only at peak times)
(only at peak times)
ØWorkload limit after which the
whole system started to fall apart
