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KMStopic: KMS concurrency control

topics > KMS topics > KMSgroup: KMS, a knowledge management system



KMStopic:
hypertext issues
KMStopic:
KMS access control
KMStopic:
KMS collaboration
KMStopic:
KMS database
KMStopic:
KMS is a distributed system
Subtopic: conflicts are rare up

KMSquote: KMS uses optimistic concurrency control since conflicts are rare [»akscRM7_1988, OK]
KMSquote: KMS avoid interference between users by breaking large artifacts into many frames [»akscRM7_1988, OK]
KMSquote: KMS frames are small: many more frames than users; so, conflicts are rare [»akscRM7_1988, OK]

Subtopic: avoid locking frames up

KMSquote: KMS optimistic concurrency helps combine browser and editor; avoids locking [»akscRM7_1988, OK]
KMSquote: KMS uses optimistic concurrency control to avoid locking frames (interference rare) [»akscRM7_1988, OK]
KMSquote: KMS if conflict between users likely, then annotate frame for informal locking [»akscRM7_1988, OK]
KMSquote: ZOG used frame locking whenever edited a frame; locking removed for KMS [»akscRM7_1988, OK]

Subtopic: do not overwrite saved changes up

KMSquote: KMS optimistic concurrency only guarantees that saved changes are not overwritten [»akscRM7_1988, OK]
KMSquote: KMS optimistic concurrency: if conflict then newer frame saved for remapping [»akscRM7_1988, OK]
KMSquote: KMS optimistic concurrency: on first modification, makes sure no earlier write
[»akscRM7_1988, OK]

Related Topics up

KMStopic: hypertext issues
KMStopic: KMS access control (3 items)
KMStopic: KMS collaboration (4 items)
KMStopic: KMS database (13 items)
KMStopic: KMS is a distributed system
(10 items)

Updated barberCB 10/89
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