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From Justin Edelson <jus...@justinedelson.com>
Subject Re: Problem with Clustering Setup (PostgreSQL)
Date Fri, 05 Nov 2010 17:36:18 GMT
Writing to these resources should be relatively rare, but YMMV,
obviously...


On 11/5/10 1:14 PM, "Sergiy Shyrkov" <my.public.mailing@gmail.com> wrote:

>Hello Justin,
>
>I am not sure NFS is a good option here as I see no way how the locking
>and concurrent access is working from several nodes to single file
>system location.
>I was always skeptical about sharing NFS resources for multiple nodes to
>write/read, unless a locking is implemented (e.g. like Apache Lucene
>does).
>Or I am missing here something and there is no concurrent access to
>these resources?
>
>Thank you in advance!
>
>Kind regards
>Sergiy
>
>On 05.11.2010 17:56, Justin Edelson wrote:
>> It could be an instance of LocalFileSystem, if the file system pointed
>>to
>> was shared by, for example, NFS or CIFS.
>>
>> But DbFileSystem is another way to do that.
>>
>> Justin
>>
>> On 11/5/10 12:22 PM, "Sergiy Shyrkov"<my.public.mailing@gmail.com>
>>wrote:
>>
>>> Hello Etile,
>>>
>>> if I correctly understood the discussion and explanations in this
>>> thread, the repository-level file system should be shared in cluster,
>>> meaning it cannot be an instance of LocalFileSystem like in your case.
>>> It should rather be DbFileSystem.
>>> Am I right?
>>>
>>> Kind regards
>>> Sergiy
>>>
>>> On 05.11.2010 09:52, Etile Basson wrote:
>>>> Hi there,
>>>>
>>>> just want to thank Thomas and Justin for their worthful hints. I
>>>> managed to
>>>> get the jackrabbit cluster up and running with PostgreSQL. Please find
>>>> my
>>>> repository.xml below this text. Do you want me to attach it to the
>>>> corresponding wiki page? It think that it might serve as a good
>>>>example
>>>> for
>>>> anyone who wants to use clustering with PostgreSQL.
>>>>
>>>> --snip--
>>>> <?xml version="1.0"?>
>>>> <!DOCTYPE Repository PUBLIC "-//The Apache Software Foundation//DTD
>>>> Jackrabbit 1.2//EN"
>>>>                               "
>>>> http://jackrabbit.apache.org/dtd/repository-1.2.dtd">
>>>> <Repository>
>>>>       <Cluster>
>>>>           <Journal
>>>> class="org.apache.jackrabbit.core.journal.DatabaseJournal">
>>>>               <param name="revision" value="${rep.home}/revision.log"
>>>>/>
>>>>               <param name="driver" value="org.postgresql.Driver" />
>>>>               <param name="url" value="${jackrabbit.repository.url}"
>>>>/>
>>>>               <param name="user"
>>>>value="${jackrabbit.repository.user}" />
>>>>               <param name="password"
>>>> value="${jackrabbit.repository.password}"
>>>> />
>>>>               <param name="schema" value="postgresql"/>
>>>>               <param name="schemaObjectPrefix" value="J_C_"/>
>>>>           </Journal>
>>>>       </Cluster>
>>>>
>>>>       <FileSystem
>>>> class="org.apache.jackrabbit.core.fs.local.LocalFileSystem">
>>>>           <param name="path" value="${rep.home}/repository"/>
>>>>       </FileSystem>
>>>>
>>>>       <Security appName="Jackrabbit">
>>>>           <AccessManager
>>>> class="org.apache.jackrabbit.core.security.SimpleAccessManager">
>>>>           </AccessManager>
>>>>
>>>>           <LoginModule
>>>> class="org.apache.jackrabbit.core.security.SimpleLoginModule">
>>>>              <param name="anonymousId" value="anonymous"/>
>>>>           </LoginModule>
>>>>       </Security>
>>>>
>>>>       <Workspaces rootPath="${rep.home}/workspaces"
>>>> defaultWorkspace="default"/>
>>>>
>>>>       <Workspace name="${wsp.name}">
>>>>           <FileSystem
>>>> class="org.apache.jackrabbit.core.fs.local.LocalFileSystem">
>>>>               <param name="path" value="${wsp.home}/filesystem"/>
>>>>           </FileSystem>
>>>>
>>>>           <PersistenceManager
>>>> 
>>>>class="org.apache.jackrabbit.core.state.db.SimpleDbPersistenceManager">
>>>>               <param name="driver" value="org.postgresql.Driver" />
>>>>           <param name="url" value="${jackrabbit.repository.url}" />
>>>>               <param name="user"
>>>>value="${jackrabbit.repository.user}" />
>>>>               <param name="password"
>>>> value="${jackrabbit.repository.password}"
>>>> />
>>>>               <param name="schema" value="postgresql"/>
>>>>               <param name="schemaObjectPrefix"
>>>>value="J_PM_${wsp.name}_"
>>>> />
>>>>               <param name="externalBLOBs" value="false" />
>>>>           </PersistenceManager>
>>>>
>>>>           <SearchIndex
>>>> class="org.apache.jackrabbit.core.query.lucene.SearchIndex">
>>>>               <param name="path" value="${wsp.home}/index"/>
>>>>           </SearchIndex>
>>>>       </Workspace>
>>>>
>>>>       <Versioning rootPath="${rep.home}/version">
>>>>           <FileSystem
>>>> class="org.apache.jackrabbit.core.fs.local.LocalFileSystem">
>>>>               <param name="path" value="${rep.home}/version" />
>>>>           </FileSystem>
>>>>
>>>>           <PersistenceManager
>>>> 
>>>>class="org.apache.jackrabbit.core.state.db.SimpleDbPersistenceManager">
>>>>               <param name="driver" value="org.postgresql.Driver" />
>>>>           <param name="url" value="${jackrabbit.repository.url}" />
>>>>               <param name="user"
>>>>value="${jackrabbit.repository.user}" />
>>>>               <param name="password"
>>>> value="${jackrabbit.repository.password}"
>>>> />
>>>>               <param name="schema" value="postgresql"/>
>>>>               <param name="schemaObjectPrefix" value="J_V_PM_" />
>>>>               <param name="externalBLOBs" value="false" />
>>>>           </PersistenceManager>
>>>>       </Versioning>
>>>>
>>>>       <SearchIndex
>>>> class="org.apache.jackrabbit.core.query.lucene.SearchIndex">
>>>>           <param name="path" value="${rep.home}/repository/index"/>
>>>>       </SearchIndex>
>>>> </Repository>
>>>> --snap--
>>>>
>>>> Regards,
>>>> Etile
>>>>
>>>> On Thu, Oct 28, 2010 at 4:51 PM, Sergiy
>>>> Shyrkov<my.public.mailing@gmail.com
>>>>> wrote:
>>>>> Thank you for the prompt reply!
>>>>>
>>>>> Kind regards
>>>>> Sergiy
>>>>>
>>>>>
>>>>> On 28.10.2010 16:32, Thomas Müller wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>>    Could you, please, give me some hints if there are any
>>>>>>advantages in
>>>>>>> using
>>>>>>> DatabaseFileSystem compared to LocalFileSystem?
>>>>>>>
>>>>>> Yes, in my view LocalFileSystem is appropriate. Only config files
>>>>>>are
>>>>>> stored in the FileSystem, no user data. LocalFileSystem is easier
to
>>>>>> use and configure. Some people may want to avoid creating files in
>>>>>>the
>>>>>> file system, so they can use a database FileSystem.
>>>>>>
>>>>>>    I assume, the information about clustering configuration
>>>>>>> (http://wiki.apache.org/jackrabbit/Clustering ) is also valid
for
>>>>>>> Jackarabbit 2.1.x/2.2.x. Is it correct?
>>>>>>>
>>>>>> Yes.
>>>>>>
>>>>>> Regards,
>>>>>> Thomas
>>>>>>
>>
>



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