|Author||Afek, Yehuda ♦ Attiya, Hagit ♦ Dolev, Danny ♦ Gafni, Eli ♦ Merritt, Michael ♦ Shavit, Nir|
|Source||ACM Digital Library|
|Publisher||Association for Computing Machinery (ACM)|
|Subject Domain (in DDC)||Computer science, information & general works ♦ Data processing & computer science|
|Subject Keyword||Atomic ♦ Consistent state ♦ Fault-tolerance ♦ Snapshot|
|Abstract||This paper introduces a general formulation of<?Pub Fmt italic>atomic snapshot memory<?Pub Fmt /italic>, a sharedmemory partitioned into words written(<?Pub Fmt italic>updated<?Pub Fmt /italic>) by individual processes, orinstantaneously read (<?Pub Fmt italic>scanned<?Pub Fmt /italic>) in itsentirety. This paper presents three wait-free implementations of atomicsnapshot memory. The first implementation in this paper uses unbounded(integer) fields in these registers, and is particularly easy tounderstand. The second implementation uses bounded registers. Itscorrectness proof follows the ideas of the unbounded implementation.Both constructions implement a single-writer snapshot memory, in whicheach word may be updated by only one process, from single-writer,<?Pub Fmt italic>n<?Pub Fmt /italic>-reader registers. The thirdalgorithm implements a multi-writer snapshot memory from atomic<?Pub Fmt italic>n<?Pub Fmt /italic>-writer,<?Pub Fmt italic>n<?Pub Fmt /italic>-reader registers, again echoing keyideas from the earlier constructions. All operations require&THgr;(<?Pub Fmt italic>n<?Pub Fmt /italic>2) readsand writes to the component shared registers in the worst case.—<?Pub Fmt italic>Authors' Abstract<?Pub Fmt /italic>|
|Age Range||18 to 22 years ♦ above 22 year|
|Education Level||UG and PG|
|Learning Resource Type||Article|
|Publisher Place||New York|
|Journal||Journal of the ACM (JACM)|
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