write-ahead log - meaning and definition. What is write-ahead log
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What (who) is write-ahead log - definition


Write-ahead logging         
TECHNIQUE FOR PROVIDING ATOMICITY AND DURABILITY IN DATABASE SYSTEMS, FOR CRASH AND TRANSACTION RECOVERY, BY RECORDING CHANGES IN A LOG WRITTEN TO STABLE STORAGE BEFORE WRITING CHANGES TO THE DATABASE
Write-ahead log; Write ahead logging; Waldo file; Writeahead log; Write ahead log
In computer science, write-ahead logging (WAL) is a family of techniques for providing atomicity and durability (two of the ACID properties) in database systems. A write ahead log is an append-only auxiliary disk-resident structure used for crash and transaction recovery.
Chip log         
  • thumb
  • Chip log in the 18th century
INSTRUMENT USED TO MEASURE THE SPEED OF A SHIP AT SEA
Log (speed); Knot log; Knotted line; Patent log; Speed log; Taffrail log; Logreel; Log reel
A chip log, also called common log, ship log, or just log, is a navigation tool mariners use to estimate the speed of a vessel through water. The word knot, to mean nautical mile per hour, derives from this measurement method.
write-down         
REDUCTION IN RECOGNIZED VALUE OF AN ENTITY
Write down; Goodwill writedown; Written off; Write-down; Writeoff; Writedown; Writedowns; Totalled; Write off; Tax write-off; Tax writeoff
¦ noun Finance a reduction in the estimated or nominal value of an asset.