| author | Dominic Pinkman <Dominic.Pinkman@Nokia.com> |
| Thu, 21 Jan 2010 18:18:20 +0000 | |
| changeset 0 | 89d6a7a84779 |
| permissions | -rw-r--r-- |
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89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
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<?xml version="1.0" encoding="utf-8"?> |
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89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. --> |
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89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
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<!-- This component and the accompanying materials are made available under the terms of the License |
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89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
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"Eclipse Public License v1.0" which accompanies this distribution, |
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89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". --> |
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89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
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<!-- Initial Contributors: |
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89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
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Nokia Corporation - initial contribution. |
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89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
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Contributors: |
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89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
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--> |
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89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
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<!DOCTYPE concept |
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89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
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PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
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89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
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<concept xml:lang="en" id="GUID-1824B323-AAA8-5403-A4CF-D1F530CBDAF5"><title>Introduction to space reclamation and compaction</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>When a stream is replaced or deleted, the space it occupies is not immediately available for re-use by other streams. 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> <section><title>See also</title> <p><xref href="GUID-C9D8D913-C65F-5A69-A606-30F59BFB38E2.dita">File stores</xref> </p> </section> </conbody></concept> |