--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/SDK/Source/GUID-1824B323-AAA8-5403-A4CF-D1F530CBDAF5.dita	Wed Mar 31 11:11:55 2010 +0100
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
+<!-- This component and the accompanying materials are made available under the terms of the License 
+"Eclipse Public License v1.0" which accompanies this distribution, 
+and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
+<!-- Initial Contributors:
+    Nokia Corporation - initial contribution.
+Contributors: 
+-->
+<!DOCTYPE concept
+  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
+<concept id="GUID-1824B323-AAA8-5403-A4CF-D1F530CBDAF5" xml:lang="en"><title>Introduction
+to Space Reclamation and Compaction</title><shortdesc>When a stream is replaced or deleted, the space it occupies is
+not immediately available for re-use by other streams. </shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>There are two things you can do about this:</p>
+<ul>
+<li id="GUID-4DDE58C7-78C8-5356-A7EA-FA1D24BFE327"><p>reclaim unused space;
+this makes it available for re-use by the store</p> </li>
+<li id="GUID-FBC8264B-B808-57D3-91FA-60A5C5074226"><p>compact; this makes
+unused space available for re-use by the relevant system pool; for example,
+the filing system in the case of file-based stores.</p> </li>
+</ul>
+<p>Space reclamation and compaction are only supported by the permanent file
+store, <codeph>CPermanentFileStore</codeph>, and are not supported by embedded
+or direct file stores. Because permanent file stores must maintain their integrity,
+even when a transaction fails, normal operations use a relatively conservative
+approach to update these stores without overwriting old data. Therefore, applications
+using permanent file stores must compact them regularly.</p>
+<p>The task of both space reclamation and compaction can be approached in
+one of two general ways:</p>
+<ul>
+<li id="GUID-4F10D740-C890-51AB-80A6-6DC76FFC39AA"><p>as a single, possibly
+long-running, job</p> </li>
+<li id="GUID-53D117F5-809C-5AB2-97E8-5AD087ABB434"><p>incrementally, as a
+series of small steps, running either synchronously or asynchronously.</p> </li>
+</ul>
+</conbody><related-links>
+<link href="GUID-C9D8D913-C65F-5A69-A606-30F59BFB38E2.dita"><linktext>File Stores</linktext>
+</link>
+</related-links></concept>
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