Boots – shoes – and leggings
Patent
1982-06-21
1985-03-26
Zache, Raulfe B.
Boots, shoes, and leggings
G06F 1520
Patent
active
045077517
ABSTRACT:
The invention provides a computing apparatus and method for maintaining a journal log. The computing apparatus includes volatile storage for storing a log buffer and a non-volatile storage for storing a journal log. Non-volatile storage means are provided for storing in a write-ahead data set a plurality of short data blocks. The log buffer contents are written to the write-ahead data set responsive to a process epoch occurring before the log buffer is filled. The log buffer contents are written to the journal log upon the log buffer being filled. The redoing or undoing of data base changes is made with reference to the write ahead data set only in the case of a system failure resulting in loss of log buffer data not yet written to the journal log; otherwise data base changes are redone or undone with reference to the log buffer or journal log.
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Mellow, et al., "Method and Apparatus for Logging Journal Data in a Continuous Address Space Across Main Storage, Direct Access, and Sequential Access Devices", U.S. Patent Application, Ser. No. 6-390454, Filed 06/21/82, (SA9-81-48).
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Gawlick Dieter
Gray James N.
Iimura Wallace M.
Obermarck Ronald L.
Beckstrand Shelley M.
Brodie R. Bruce
International Business Machines - Corporation
Zache Raulfe B.
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