what is meant by log-based recoverythe most
What is meant by log-based recovery?
The most widely used structures for recording database changes is the log. The log is a sequence of log records, recording all the update activities in the database. There are various types of log records.
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what are the storage typesthe storage types area volatile storageb nonvolatile
define blocksthe database system resides eternally on non-volatile storage and is into fixed-length storage units known as
what is meant by physical blocksthe input and output operations are completed in block units the blocks residing on the disk are referred to as
what is meant by buffer blocks and disk buffer the blocks residing temporarily in main memory are referred to as buffer blocksthe area of memory
what is meant by log-based recoverythe most widely used structures for recording database changes is the log the log is a sequence of log records
what are uncommitted modificationsthe immediate-modification technique permits database modifications to be output to the database whereas the
define shadow pagingan alternative to log-based crash recovery method is shadow paging this technique requires fewer disk accesses than do the
define pagethe database is partitioned into some number of fixed-length blocks which are referred to as
explain current page table and shadow page tablethe key idea behind the shadow paging method is to maintain two page tables during the life of the
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