Apache Solr vs Liferay Digital Experience Platform (DXP)

• Easy to get started with Apache Solr. Whether it is tackling a setup issue or trying to learn some of the more advanced features, there are plenty of resources to help you out and get you going.
• Performance. Apache Solr allows for a lot of custom tuning (if needed) and provides great out of the box performance for searching on large data sets.
• Maintenance. After setting up Solr in a production environment there are plenty of tools provided to help you maintain and update your application. Apache Solr comes with great fault tolerance built in and has proven to be very reliable.

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• Theming
• Customization based on user roles
• Content Management
• Flexibility

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• These examples are due to the way we use Apache Solr. I think we have had the same problems with other NoSQL databases (but perhaps not the same solution). High data volumes of data and a lot of users were the causes.
• We have lot of classifications and lot of data for each classification. This gave us several problems:
• First: We couldn't keep all our data in Solr. Then we have all data in our MySQL DB and searching data in Solr. So we need to be sure to update and match the 2 databases in the same time.
• Second: We needed several load balanced Solr databases.
• Third: We needed to update all the databases and keep old data status.
• If I don't speak about problems due to our lack of experience, the main Solr problem came from frequency of updates vs validation of several database. We encountered several locks due to this (our ops team didn't want to use real clustering, so all DB weren't updated). Problem messages were not always clear and we several days to understand the problems.

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• Portal Security: It has good security model but in few areas it requires improvement.
• Encrypt LDAP passwords on import
• Log in should be via SSL by default
• Upgrade/patch process should include an alert in the control panel
• Add virus scan for uploaded files
• Server Administration
• Garbage Collector should be able to be scheduled to run from the control panel
• Reindexing should be able to be scheduled from the control panel
• Provide GUI to change the default Liferay favorite icon to any desired logo
• LDAP mapping GUI to custom Liferay attributes
• Configurations: Less configurations from properties files and provide more GUI to update from control panel.

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• It's enabled us to deliver fast, relevant search results on our new website. The site is still in beta and being actively developed so our complete ROI is still unknown.
• It integrates very well with Drupal so it has saved us from having to develop a custom solution.

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• Can reduce IT costs eventually.
• Increases upfront costs due to technical knowledge needed for initial setup and maintenance.
• Hard to analyze ROI until after it's totally implemented.

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