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part to the defensive measures described here, no data has been
lost. The integrity checks are doing their job well.</p>
<h2>Atomic Check-ins With Rollback</h2>
The Fossil repository is stored in an
<a href="http://www.sqlite.org/">SQLite</a> database file.
([./tech_overview.wiki | Addition information] about the repository
([./tech_overview.wiki | Additional information] about the repository
file format.)
SQLite is very mature and stable and has been in wide-spread use for many
years, so we are confident it will not cause repository
corruption. SQLite
databases do not corrupt even if a program or system crash or power
failure occurs in the middle of the update. If some kind of crash
does occur in the middle of a change, then all the changes are rolled
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