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  • Committer: Bazaar Package Importer
  • Author(s): Didier Roche
  • Date: 2010-05-17 17:02:06 UTC
  • mfrom: (1.1.79 upstream) (1.6.12 experimental)
  • Revision ID: james.westby@ubuntu.com-20100517170206-4ufr52vwrhh26yh0
Tags: 2.30.1-1ubuntu1
* Merge from debian experimental. Remaining change:
  (LP: #42199, #229669, #173703, #360344, #508494)
  + debian/control:
    - add Vcs-Bzr tag
    - don't use libgnome
    - Use Breaks instead of Conflicts against evolution 2.25 and earlier.
  + debian/evolution-data-server.install,
    debian/patches/45_libcamel_providers_version.patch:
    - use the upstream versioning, not a Debian-specific one 
  + debian/libedata-book1.2-dev.install, debian/libebackend-1.2-dev.install,
    debian/libcamel1.2-dev.install, debian/libedataserverui1.2-dev.install:
    - install html documentation
  + debian/rules:
    - don't build documentation it's shipped with the tarball

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<!--$Id$-->
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<!--Copyright 1997-2002 by Sleepycat Software, Inc.-->
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<!--All rights reserved.-->
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<!--See the file LICENSE for redistribution information.-->
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<html>
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<head>
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<title>Berkeley DB Reference Guide: Disk drive caches</title>
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<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
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<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++">
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</head>
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<body bgcolor=white>
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<table width="100%"><tr valign=top>
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<td><h3><dl><dt>Berkeley DB Reference Guide:<dd>Programmer Notes</dl></h3></td>
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<td align=right><a href="../../ref/program/namespace.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../reftoc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/program/copy.html"><img src="../../images/next.gif" alt="Next"></a>
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</td></tr></table>
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<p>
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<h1 align=center>Disk drive caches</h1>
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<p>Many disk drives contain onboard caches.  Some of these drives include
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battery-backup or other functionality that guarantees that all cached
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data will be completely written if the power fails.  These drives can
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offer substantial performance improvements over drives without caching
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support.  However, some caching drives rely on capacitors or other
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mechanisms that guarantee only that the write of the current sector
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will complete.  These drives can endanger your database and potentially
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cause corruption of your data.
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<p>To avoid losing your data, make sure the caching on your disk drives is
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properly configured so the drive will never report that data has been written
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unless the data is guaranteed to be written in the face of a power failure.
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Many times, this means that write-caching on the disk drive must
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be disabled.
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<table width="100%"><tr><td><br></td><td align=right><a href="../../ref/program/namespace.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../reftoc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/program/copy.html"><img src="../../images/next.gif" alt="Next"></a>
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</td></tr></table>
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<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font>
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</body>
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</html>