Fw: question about search indexes and clusters

Khue Nguyen Mon, 17 Jan 2005 03:28:52 -0800

Hi,


Scenario:

server1/Jahia1 and server2/Jahia2 are clustered
Jahia1: configured for no indexation
Jahia2: configured for indexation


and both of them using a same search index file, i.e. :

<init-param>
 <param-name>org.apache.lucene.searchIndexRootDir</param-name>
 <param-value>c:/jahialuceneindex</param-value>
</init-param>

When a file(PDF) is uploaded on Jahia1, a JMS message is sent to Jahia2 to index the PDF. Jahia2 indexes the PDF... Question 1: How does it access the PDF?


yes,
all clusters use a same webdav server for storing and retrieving files

After Jahia2 finishes the indexation, it sends a JMS message to Jahia1 to update the index, so that users can search on Jahia1??


no messages are sent to notify that indexation is done, as it is performed
in a separate Thread in background.
Jahia1 can  see the result once the indexation has been done. In mean time,
search queries are still processed.


Regards,
Khue Nguyen

Thanks
Gilles
--- Khue Nguyen <[EMAIL PROTECTED]> a �crit :
the search engine uses the clustering capacities of Jahia's cache system ( using JMS ) to propagate search indexation between all clustered Jahia servers. So when a file upload occurs on a server that actually doesn't index files, the other clusters will ( as long as they are set to do so ).
Regards,
Khue Nguyen
----- Original Message ----- From: "Gilles Schlienger" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, January 14, 2005 9:18 PM Subject: Re: question about search indexes and clusters

> Thanks Khue > > I understand what you mean, > but what happens if a user is uploading a file using the server that > does > not index files? > Or, how do you force users to upload files using only one server? > If the file is not indexed, you can't search it? > > Thanks > Gilles > > --- Khue Nguyen <[EMAIL PROTECTED]> a �crit : >> Hi, >> >> >> by default each Jahia instance do index and search in a separate >> index >> file. >> But you can configure each of them to : >> >> 1) only search but no perform indexation >> 2) to use a common search index >> >> These settings are done in the web.xml file of each Jahia instance. >> >> <init-param> >> <param-name>org.apache.lucene.searchIndexRootDir</param-name> >>  >> <param-value>/WEB-INF/var/search_indexes</param-value> >> </init-param> >> >> <init-param> >> <param-name>org.apache.lucene.localIndexing</param-name> >> <param-value>1</param-value>  >> </init-param> >> >> we've managed to refactor the search service in near future. >> >> >> Regards, >> Khue Nguyen >> >> >> >> ----- Original Message ----- >> From: "Gilles Schlienger" <[EMAIL PROTECTED]> >> To: <[email protected]> >> Sent: Friday, January 14, 2005 3:50 PM >> Subject: question about search indexes and clusters >> >> >> > Hi everyone, >> > >> > I'm currently setting up Jahia in a cluster environment with 2 >> > Jahia >> > servers. >> > >> > I need failover support in my architecture. Thus I need to have >> > data >> > duplicated on both servers. >> > I'm thinking about implementing a mechanism to notify and >> > synchronize >> > the >> > other machine and vice >> > versa, especially for the Jahia files (Big Text, PDFs etc...) >> > >> > But what about the search indexes? >> > I'm a little nervous about synchronizing index files. >> > I'm thinking about this scenario: >> > Since indexing a file (PDF) can take some time, if user1 indexes a >> > PDF >> > on >> > server1 and user2 >> > idnexes a PDF on server2 almost at the same time, then index files >> > could >> > be overriden one with the >> > other during synchronisation. >> > >> > I've read the Jahia Clustering HowTo. They talk about only having >> > one >> > Jahia instance for indexing, >> > ut how do you implement this? (do you configure with the Lucene >> > config >> > files ?) >> > >> > Thanks again for any help about clustering >> > Gilles >> > >> > >> > >> > >> > >> > >> > D�couvrez le nouveau Yahoo! Mail : 250 Mo d'espace de stockage pour >> > vos >> > mails ! >> > Cr�ez votre Yahoo! Mail sur http://fr.mail.yahoo.com/ >> >> >> > > > > > > > D�couvrez le nouveau Yahoo! Mail : 250 Mo d'espace de stockage pour > vos > mails ! > Cr�ez votre Yahoo! Mail sur http://fr.mail.yahoo.com/ >
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Fw: question about search indexes and clusters

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