Technical Insights: March 2012

Wednesday, March 28, 2012

Tuesday, March 27, 2012

Documentum Distributed Models

Single Repository distributed environments (Content is distributed across sites)

A Single Repository, with content stored at the primary site and accessed from remote sites using ACS Server. Optionally, BOCS servers can be used.
A Single Repository, with content stored in a distributed storage area and accessed from remote sites using Remote Content Servers, ACS Servers, and optionally BOCS Servers.

Multi-Repository distributed environments (Objects, content & metadata, are distributed across sites)

Multiple Repositories that replicate objects among themselves.
Multiple Repositories organized as a federation.

Single Repository - Distributed Model-1

Single Repository - Distributed Model-2

Monday, March 26, 2012

Documentum xPlore is the next-generation search engine for Documentum.It is built on technology foundation of EMC xDB (native XML database) and Lucene. This combination of custom schema handling provided by xDB and index lookup by lucene is optimized by custom document type capabilities of Documentum.

xPlore is a D6.5 SP2 (or later) compatible indexing system. xPlore v1.2 is the latest version released in November 2011.

Documentum xPlore vs FAST:

VMWare Support
Integrated Documentum security
Native Facet Computation
Improved performance and scaling
Query and Ingestion analytics
Multi-node
Improved HA/DR Support

xPlore features at a glance:

Next-generation search engine

Combined meta data and content search
Zero-day tuning of the indexing schema
Leverage XML and XQuery standards
Integrated Documentum Security

Infrastructure

Vmware Support
SAN/NAS ready
Improved HA/DR Support
Hot backups

Performance and Scaling
Quality of Search
Query-based subscriptions
Support Languages

English, German, Chinese
French, Italian, Spanish, Japanese and Korean
Russian, Arabic, Hebrew and Brazilian Portuguese

Indexing
Customizable Natural Language Processing Pipeline (NLP)
Administration
Data Management

More information on xPlore is available at:

Friday, March 16, 2012

Notes on DFS

DFS will be installed on documentum server at port 9080 by default and can be tested using below url.

http://localhost:9080/services/core/QueryService?wsdl.

We can also install DFS on web/App server as per below steps

Deploying on Apache Tomcat

Apache Tomcat does not support EAR archives. Therefore, to deploy on Tomcat, download emc-dfs.war for DFS (or the provided WAR file for a separate ECS deployment), using any of the various methods supported by Tomcat.

Note:

If the default maximum heap size of Tomcat is not large enough to run DFS and ECS services, increase it to 256 MB.

When deploying to Tomcat, we recommend making DFS the default application for the virtual host by setting its context path to a zero-length string. This step gives DFS the expected context root of http://<host_name>:<port>/services.

You can use the following procedure to perform a simple war file deployment.

1. Stop the Apache Tomcat server.

2. If the Tomcat JVM maximum heap size (also called Maximum Memory Pool) is less than 256 MB, increase it to 256 MB.

3. Copy the WAR file to the <TomcatHome>/webapps directory.

4. Modify the <TomcatHome>/conf/server.xml file and add an element like the following inside the <host> element.

This modification makes DFS the default application on the virtual host.

5. Start the Apache Tomcat server.

On startup, Tomcat unpacks the WAR file to a <TomcatHome>/webapps/<application_name> directory, where <application_name> is the name of the WAR file without the file extension

Wednesday, March 7, 2012

One-stop-shop for Documentum Performance

EMC has created performance corner on EDN for everything related to Documentum performance. Here is the landing page. It has lot of useful information and ideas related to performance. please do visit this page often for performance related tidbits / documentation.

https://community.emc.com/docs/DOC-12038