我即将开始在社区版本中对由hippocms运行的 jackrabbit 存储库进行集群。我启动并运行了它，但配置的某些部分我不明白。
我以这种方式理解了集群jackrabbit的概念：例如，您有两个具有两个本地存储库的实例，它们通过共享数据库由火箭科学期刊同步，但每个节点都使用它的本地存储库。
在阅读了以下页面后，我最终得到了以下配置。
链接：
- http://wiki.apache.org/jackrabbit/Clustering
- http://svn.apache.org/viewvc/jackrabbit/trunk/jackrabbit-core/src/test/resources/org/apache/jackrabbit/core/cluster/repository-h2.xml?view=co&content-type=text/清楚的
- http://greymeister.net/blog/2011/11/28/jackrabbit-clustering-primer.html
信息： sharedRepositoryDS指向共享数据库 repositoryDS指向本地数据库（在每个节点上）
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE Repository PUBLIC
"-//The Apache Software Foundation//DTD Jackrabbit 1.5//EN"
"http://jackrabbit.apache.org/dtd/repository-1.5.dtd">
<Repository>
<FileSystem class="org.apache.jackrabbit.core.fs.db.DbFileSystem">
<param name="url" value="java:comp/env/jdbc/sharedRepositoryDS"/>
<param name="driver" value="javax.naming.InitialContext"/>
<param name="schemaObjectPrefix" value="repository_"/>
<param name="schema" value="mysql"/>
</FileSystem>
<Security appName="Jackrabbit">
<SecurityManager
class="org.hippoecm.repository.security.SecurityManager"/>
<AccessManager
class="org.hippoecm.repository.security.HippoAccessManager"/>
<LoginModule
class="org.hippoecm.repository.security.HippoLoginModule"/>
</Security>
<Workspaces rootPath="${rep.home}/workspaces" defaultWorkspace="default"/>
<Workspace name="${wsp.name}">
<FileSystem class="org.apache.jackrabbit.core.fs.db.DbFileSystem">
<param name="url" value="java:comp/env/jdbc/repositoryDS"/>
<param name="driver" value="javax.naming.InitialContext"/>
<param name="schemaObjectPrefix" value="${wsp.name}_"/>
<param name="schema" value="mysql"/>
</FileSystem>
<PersistenceManager
class="org.apache.jackrabbit.core.persistence.bundle.MySqlPersistenceManager">
<param name="driver" value="javax.naming.InitialContext"/>
<param name="url" value="java:comp/env/jdbc/sharedRepositoryDS"/>
<param name="schemaObjectPrefix" value="${wsp.name}_"/>
<param name="externalBLOBs" value="true"/>
<param name="consistencyCheck" value="false"/>
<param name="consistencyFix" value="false"/>
</PersistenceManager>
<SearchIndex class="org.hippoecm.repository.FacetedNavigationEngineImpl">
<param name="indexingConfiguration" value="indexing_configuration.xml"/>
<param name="indexingConfigurationClass"
value="org.hippoecm.repository.query.lucene.ServicingIndexingConfigurationImpl"/>
<param name="path" value="${wsp.home}/index"/>
<param name="useCompoundFile" value="true"/>
<param name="minMergeDocs" value="1000"/>
<param name="volatileIdleTime" value="10"/>
<param name="maxMergeDocs" value="1000000000"/>
<param name="mergeFactor" value="5"/>
<param name="maxFieldLength" value="10000"/>
<param name="bufferSize" value="1000"/>
<param name="cacheSize" value="100000"/>
<param name="enableConsistencyCheck" value="true"/>
<param name="autoRepair" value="true"/>
<param name="analyzer"
value="org.hippoecm.repository.query.lucene.StandardHippoAnalyzer"/>
<param name="queryClass" value="org.apache.jackrabbit.core.query.QueryImpl"/>
<param name="respectDocumentOrder" value="false"/>
<param name="resultFetchSize" value="100"/>
<param name="extractorPoolSize" value="0"/>
<param name="extractorTimeout" value="100"/>
<param name="extractorBackLogSize" value="100"/>
<param name="excerptProviderClass"
value="org.apache.jackrabbit.core.query.lucene.DefaultHTMLExcerpt"/>
<!-- supportHighlighting value is ignored, see REPO-711 -->
<param name="supportHighlighting" value="false"/>
<param name="supportSimilarityOnStrings" value="true"/>
<param name="supportSimilarityOnBinaries" value="false"/>
<param name="slowAlwaysExactSizedQueryResult" value="false"/>
<param name="onWorkspaceInconsistency" value="log"/>
<!-- optional cache parameters for faceted engine. The default size
when not configured is 1000 for both parameters -->
<!-- param name="docIdSetCacheSize" value="1000"/>
<param name="facetValueCountMapCacheSize" value="1000"/-->
</SearchIndex>
<ISMLocking
class="org.apache.jackrabbit.core.state.FineGrainedISMLocking"/>
</Workspace>
<Versioning rootPath="${rep.home}/version">
<FileSystem class="org.apache.jackrabbit.core.fs.db.DbFileSystem">
<param name="url" value="java:comp/env/jdbc/repositoryDS"/>
<param name="driver" value="javax.naming.InitialContext"/>
<param name="schemaObjectPrefix" value="version_"/>
<param name="schema" value="mysql"/>
</FileSystem>
<PersistenceManager
class="org.apache.jackrabbit.core.persistence.bundle.MySqlPersistenceManager">
<param name="driver" value="javax.naming.InitialContext"/>
<param name="url" value="java:comp/env/jdbc/sharedRepositoryDS"/>
<param name="schemaObjectPrefix" value="version_"/>
<param name="externalBLOBs" value="true"/>
<param name="consistencyCheck" value="false"/>
<param name="consistencyFix" value="false"/>
</PersistenceManager>
<ISMLocking
class="org.apache.jackrabbit.core.state.FineGrainedISMLocking"/>
</Versioning>
<DataStore class="org.apache.jackrabbit.core.data.db.DbDataStore">
<param name="url" value="java:comp/env/jdbc/sharedRepositoryDS"/>
<param name="driver" value="javax.naming.InitialContext"/>
<param name="databaseType" value="mysql"/>
<param name="minRecordLength" value="1024"/>
<param name="maxConnections" value="5"/>
<param name="copyWhenReading" value="true"/>
</DataStore>
<Cluster id="node1" syncDelay="2000">
<Journal class="org.apache.jackrabbit.core.journal.DatabaseJournal">
<param name="revision" value="${rep.home}/revision.log" />
<param name="driver" value="javax.naming.InitialContext"/>
<param name="url" value="java:comp/env/jdbc/sharedRepositoryDS"/>
<param name="databaseType" value="mysql"/>
<param name="schemaObjectPrefix" value="journal_"/>
</Journal>
</Cluster>
</Repository>
问题：
- 配置是否正确？
- 什么是 repository.FileSystem ？
- 与 repository.Workspace.FileSystem 有什么区别？
- PersistenceManager 负责写入数据，但为什么要写入共享数据库呢？（我想摆脱这个瓶颈对吧？）
数据库表
这是本地节点数据库的样子（对我来说有点太少了）：
这是共享数据库的样子：
