Performance of ClearCase Version Importer
I'm working with a customer who is using the RTC 4.0.6 ClearCase version importer to export 9 GB of data from a (base) ClearCase (8.0.0.9) VOB. He's been watching the log file and it's seeming to take about 1 minute per element. Does anyone know if this metric is within the 'expected/normal' range? Here's what he sees at the command line (after about 5 hours):
C:\Program Files (x86)\IBM\ClearCaseSynchronizer\ccctools\eclipse>ccc export ccase -i M:\E0089660_view3\EPS -d C:\000\eps_vob_export
2014-05-30 08:38:33,812 INFO Starting to export data from Rational ClearCase view "E0089660_view3". The details are logged in "C:\000\eps_vob_export\logs\exportCCase.2014-05-30T08.38.21.log".
2014-05-30 09:33:46,939 INFO Exported 1000 versions.
2014-05-30 12:18:58,968 INFO Exported 2000 versions.
2014-05-30 14:43:05,462 INFO Exported 3000 versions.
C:\Program Files (x86)\IBM\ClearCaseSynchronizer\ccctools\eclipse>ccc export ccase -i M:\E0089660_view3\EPS -d C:\000\eps_vob_export
2014-05-30 08:38:33,812 INFO Starting to export data from Rational ClearCase view "E0089660_view3". The details are logged in "C:\000\eps_vob_export\logs\exportCCase.2014-05-30T08.38.21.log".
2014-05-30 09:33:46,939 INFO Exported 1000 versions.
2014-05-30 12:18:58,968 INFO Exported 2000 versions.
2014-05-30 14:43:05,462 INFO Exported 3000 versions.
3 answers
The reference performance measurement is available at this page:
https://jazz.net/wiki/bin/view/Deployment/ClearCaseVersionImporter406PerformanceReport
The export command runs from 0.3 ~ 3.6 seconds per version ( not per element ).
Note that the performance of the export command depends on how *warm* the cleartext cache is.
Also, it may be good idea to try RTC 5.0 RC1 spin as well because the importer's performance has been improved in 5.0 M3 :
https://jazz.net/downloads/rational-team-concert/milestones/5.0M3?p=news#ccverimporter-perf
https://jazz.net/wiki/bin/view/Deployment/ClearCaseVersionImporter406PerformanceReport
The export command runs from 0.3 ~ 3.6 seconds per version ( not per element ).
Note that the performance of the export command depends on how *warm* the cleartext cache is.
Also, it may be good idea to try RTC 5.0 RC1 spin as well because the importer's performance has been improved in 5.0 M3 :
https://jazz.net/downloads/rational-team-concert/milestones/5.0M3?p=news#ccverimporter-perf
Masabumi--
The export completed with errors about cyclic dependencies in ClearCase. Since it's 9GB of data, I would like to get an idea of what is going to happen before we launch the import. Will these elements be skipped?
Thank you.
Comments
We are looking at the user mapping and there's a reference here that says that we can change the user mapping after import but the "For more information" link seems to indicate that the mapping is only done at import.
Can you please confirm that post-import mapping is possible and provide the steps to do it?