Performance Optimization in Documentum DFS

suriz4u

Hi All,

We are looking for performance optimization techniques in Documentum DFS. We developed an POC program using DFS APIs to get a file from Documentum server. But it is currently taking anywhere from 2 to 12 minutes (inconsistently) to get a file of size 100MB. We are looking at different options to reduce this time. We tried few options like MTOM but it’s not giving consistent results. Also we tried to integrate UCF with DFS but we are facing following error,

"

com.emc.documentum.fs.rt.ucf.UcfException: 'C:\DOCUME~1\CBC0176\LOCALS~1\Temp\uc

f-installer.jar-2140575864719568565' signature verification failed: certificate

for 'All-MB.jar.checksum' not signed by a certification authority

        at com.emc.documentum.fs.rt.ucf.DownloadedUcfConnector.verify(Downloaded

UcfConnector.java:315)

        at com.emc.documentum.fs.rt.ucf.DownloadedUcfConnector.downloadAndInstan

tiateUcfInstaller(DownloadedUcfConnector.java:123)

        at com.emc.documentum.fs.rt.ucf.DownloadedUcfConnector.<init>(Downloaded

UcfConnector.java:41)

        at com.emc.documentum.fs.rt.ucf.UcfIdRetrieverFactory.getRetriever(UcfId

RetrieverFactory.java:27)

        at com.emc.documentum.fs.rt.ucf.UcfConnection.<init>(UcfConnection.java:

141)

        at com.emc.documentum.fs.rt.ucf.UcfConnection.<init>(UcfConnection.java:

171)

        at CopyOfDFS.main(CopyOfDFS.java:101)"

PFA code of DFS with UCF transfer type.

Also i found on web that UCF with DFS uses applets and servlets. In our case we need a plain java program using DFS API to get files from documentum server.  Please let me know whether i can use UCF in this case.Also please let me know whether UCF/MTOM is better.

Any pointers on performance optimization techniques of DFS (such as UCF,MTOM etc) helps us a lot.

Thanks,

Suresh

CopyOfDFS.zip

mszurap

Hi,

For large files UCF is the best choice.

You need applets for UCF content transfer only when you need to transfer the content to the end user's client machine through a browser. If you have a fully featured JRE environment (a server side java application) then you can use UCF libraries found in DFS SDK without any problems (if you have at least Java 1.5).

First looking at your code it should work with UCF, but keep in mind that after getting the content as file and reading it all over just to write out on the console is slowing the process.

Regarding the exception message it seems that ucf cannot install itself correctly. Which ucf jars have you put on your classpath (in your WEB-INF/lib if it's a web application)?

Mike