IBM Rational ClearCase - Weaknesses

Weaknesses

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  • Speed: ClearCase dynamic and snapshot views are slower than local filesystems, even with good network infrastructure. Repeated subsequent builds may run dramatically faster, due to build avoidance using ClearCase's make substitute. Because MVFS requires server access every time a file is accessed, the performance of the file system depends on server capacity.
  • Sensitivity to network problems: Because MVFS is essentially an online file system, failures of the server or network render the dynamic views unavailable. Offline access to the MVFS requires working in a snapshot view. A snapshot view may be created with an identical configuration specification. If the view data for dynamic views is stored on a client host (as may be done for performance reasons or to reduce the need for servers), ClearCase does not automatically handle host IP address changes. (2007)

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