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Exercises: Configuration Management with ClearCase

Exercises: Configuration Management with ClearCase. What is ClearCase?. ClearCase is…. Version management tool for all types of files and directories - records all actions - reports history - accurate reproduction of every release Available both in Unix and Windows NT environments

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Exercises: Configuration Management with ClearCase

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  1. Exercises: Configuration Management with ClearCase

  2. What is ClearCase?

  3. ClearCase is… • Version management tool for all types of files and directories- records all actions- reports history- accurate reproduction of every release • Available both in Unix and Windows NT environments • Two user interfaces- command line: ‘cleartool’- graphical: ‘xclearcase’

  4. Basic Concepts • VOB- Versioned Object Base - the whole database consists of several VOBs • CONFIG SPEC- configuration specification (file) that defines what version of each VOB element you see in your view • VIEW- a working area from where you have access to the VOB- each individual developer or closely coordinated group has an own view

  5. Basic Concepts (cont.) • ELEMENT- file or directory that is stored in a VOB • META-DATAtypes:- labels- attributes- hyperlinks- triggers- can be connected to a specific version of an element, or to a branch, or to the entire element

  6. element * CHECKEDOUT element * /main/LATEST element * CHECKEDOUT element * /main/LATEST element * CHECKEDOUT element * /main/LATEST Basic Concepts (cont.) VOBs vob3 vob2 vob1 CONFIG SPECs element * CHECKEDOUT element * ../phase2/LATEST element * REL1 -mkbranch phase2 element * /main/LATEST VIEWs Kalle’s view Anna’s view Test group’s view Peter’s view elements

  7. element * CHECKEDOUT element * /main/LATEST Default Config Spec: element * CHECKEDOUT element * /main/LATEST - a rule per line - rules are processed from top to bottom; if no matching version of an element was not found for the first rule, the system tries to find a version that matches the second rule etc.

  8. Files in a Normal View Window z.cc w.cc x.cc y.cc CHECKEDOUT

  9. /main /main /main /main Files in Version Tree Browser Window x.cc y.cc z.cc w.cc 0 0 0 0 1 1 1 1 2 2 2 2 3 3 3 3 4 4 CHECKEDOUT 4 5

  10. /main /main /main /main 4 Versions that match with Default Config Spec 0 0 0 0 1 1 1 1 2 2 2 2 3 3 3 3 4 4 5 x.cc y.cc z.cc w.cc

  11. /main /main /main /main Labelling x.cc y.cc z.cc w.cc 0 0 0 0 1 1 1 1 2 2 REL1 2 2 REL1 3 REL1 3 3 3 4 4 4 REL1 5

  12. element * CHECKEDOUT element * /main/LATEST Example of Config Spec for Label ‘REL1’: element * REL1 element * /main/LATEST

  13. /main /main /main /main Versions that match using the Config Spec for ‘REL1’ 0 0 0 0 1 1 1 1 2 2 2 REL1 2 REL1 3 REL1 3 3 3 4 4 4 REL1 5 x.cc y.cc z.cc w.cc

  14. /main /main /main /main Branching x.cc y.cc z.cc w.cc 0 0 0 0 1 1 1 1 2 2 REL1 2 2 rel1_corr REL1 3 REL1 3 3 3 0 rel1_corr 4 4 4 0 1 REL1 5 1

  15. element * CHECKEDOUT element * /main/LATEST Example of ‘Branch Config Spec’ element * CHECKEDOUT element * /main/rel1_corr/LATEST element * REL1 -mkbranch rel1_corr element * /main/LATEST

  16. /main /main /main /main Versions that match using the ‘Branch Config Spec’ x.cc y.cc z.cc w.cc 0 0 0 0 1 1 1 1 2 2 REL1 2 2 rel1_corr REL1 3 REL1 3 3 3 0 rel1_corr 4 4 4 0 1 REL1 5 1 z.cc x.cc y.cc w.cc

  17. Basic Actions for an Element • Checkout- a new editable version is created- only one person can edit the file at the same time • Checkin- the version that was created by checkout command is saved to the VOB and is then visible to the other views - the element changes to write-protected mode • Uncheckout - undo operation for checkout

  18. Other Utilities • Clearmake- ClearCase variant of the Unix ‘make’ utility • MultiSite- same VOB is used concurrently at several different locations

  19. That’s ClearCase! Let’s try how it works in practise …

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