WARNING:
JavaScript is turned OFF. None of the links on this concept map will
work until it is reactivated.
If you need help turning JavaScript On, click here.
This Concept Map, created with IHMC CmapTools, has information related to: ch15 repl high, Highly available services ???? we discuss the application of replication techniques to make services highly available. we aim to give clients access to the service with: reasonable response times for as much of the time as possible even if some results do not conform to sequential consistency e.g. a disconnected user may accept temporarily inconsistent results if they can continue to work and fix inconsistencies later eager versus lazy updates fault-tolerant systems send updates to RMs in an ‘eager’ fashion (as soon as possible) and reach agreement before replying to the client for high availability, clients should: only need to contact a minimum number of RMs and be tied up for a minimum time while RMs coordinate their actions weaker consistency generally requires less agreement and makes data more available. Updates are propagated 'lazily'.