when partitions reconnected, inconsistencies detected and repaired. quorum consensus ... on reconnection, smaller partition brought up to date. virtual partition ...
Note that the communications module does not form part of the data store abstraction. ... Issues: as previous two s. Recall: Modern Compiler Architecture ...
Major Greg Phillips. Royal Military College of Canada. Electrical and Computer Engineering ... john. paul. nfs. users. george. ringo. usr. students. staff ...
what it means to express a system's 'architecture' ... new hardware or requirements caused complete redesigns. hardware and interfaces changing rapidly ...
shared information must be long-lived, so that it survives even when no-one is ... system ... (pointer swizzling), and maintain mapping between OID and POID ...
Electrical and Computer Engineering. greg.phillips@rmc.ca 1-613-541-6000 ext. 6190 ... Today we'll discuss one possible process for designing a layered system. ...
We have looked at the design of a Simple Name Service, discussed some of its ... the tactical environment, where it is unwise to rely on the availability of any ...
shared information must be long-lived, so that it survives even when no-one is working on it ... passivate object into store. Flattening and Unflattening ...
virtual protocols are the horizontal arrows; why are these called 'virtual' ... application developers typically use a thin layer on top of ... exchangeability ...
... completed our look at distributed file systems, which are an important category ... divided into arbitrarily nested directories. organizationally partitioned ...
dominant characteristic is a mix of high and low level issues ... may also be horizontal structure (independent operations at same level of abstraction) ...
efficiency, reliability, monitoring, hold-back, negative acknowledgement, ... used when it is essential to ensure that all processes in the group proceed in lock-step ...
enrich data by computing and adding information ... BufferedOutputStream out = new BufferedOutputStream ... An Architectural Comparison. OO System Architecture ...
the pattern of data flow is explicit. In a pure data flow system, there is no other interaction between processes ... Desired speed can only be calculated when ...
dominant question is how data moves through a collection of (atomic) computations ... is created in an application scripting language (e.g., Unix sh or Java) ...
Implementation involves writing each of the batch programs to read the ... run pipes and filters (non-deterministically) until no more computations are possible ...