Criticisms
The architectural approach of cc:Mail had drawbacks both in terms of scalability and in terms of vulnerability of cc:Mail databases to data corruption due to network errors or network operating system software defects. The cc:Mail system became notorious for its tendency to suffer database corruptions. Additionally, the technology was originally developed in a 1980s environment comprising disconnected LANs linked by dial-up connections. While the technology adapted well to WAN environments due to the robust nature of the Router, the system was best suited to a highly distributed deployment model. Client access over a WAN was not recommended because of poor performance related to the network traffic overhead of file I/O redirection and because of increased risk of database corruption. Although automation was possible, maintenance of large numbers of databases, each with relatively few users, was undesirable compared to highly centralized client/server systems where client access could be reliably provided over a WAN.
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