Make IO operations with nbackup backup file aligned at page size boundary
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Key: CORE-4939
URL: http://tracker.firebirdsql.org/browse/CORE-4939
Project: Firebird Core
Issue Type: Improvement
Components: NBACKUP
Reporter: Vlad Khorsun
Currently nbackup backup file contains backup header followed by set of
<page_number, page_contents> pairs.
Since ODS 12 we store page number at page header. Therefore there is no need to
store page_number before
page contents in backup file. Such change makes IO aligned at page size
boundary which should be more efficient
and opens possibility to work with async\unbuffered IO in the future.
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