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<p>solutions or <a href="page.php?w=Logging_%28computing%29">logging</a> and <a href="page.php?w=Locking_%28computer_science%29">locking</a>.</p>

<p><big> System level </big></p>
<p>At system level, failures happen, by definition, when the contents of the volatile storage are lost. This can occur in events like system crashes or <a href="page.php?w=Power_outage">power outages</a>. Existing database systems use volatile storage (i.e. the <a href="page.php?w=Computer_memory">main memory</a> of the system) for different purposes: some store their whole state</p><p>
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