Client-to-server connections for Rational DOORS

The number of connections that can be made from the client to the database server are limited. That number varies depending on the operating system that the Rational® DOORS® database server is running on.

The connection limits are shown in the following table. If you exceed the maximum number of connections, data might be corrupted.

Table 1. Connection limits
Operating system Maximum number of connections
Windows 1024
Solaris 32,000
Linux 900

Setup for Solaris environments

To allow 32,000 concurrent users on a Solaris system, set up your environment to make 65,536 file descriptors available to the Rational DOORS server.

To make 65,536 file descriptors available, set up extended FILE support on the Solaris server. From the Solaris 10 07/2007 release onwards, extended FILE support comes as standard. You can turn on the support by entering these commands:
ulimit -n 65536
export LD_PRELOAD_32=/usr/lib/extendedFILE.so.1
cd $DOORSHOME/bin
./doorsd
If you are running an earlier version of Solaris 10, you must install three server patches; all are for the SPARC platform.
  • 125100-04 Kernel Update Patch
  • 120473-05 libc nss ldap PAM zfs Patch
  • 125800-01 Fault Manager Patch

Limits in Linux environments

By default, the file descriptor limit on Linux systems is 1024. That limit is the optimum amount for running Rational DOORS. Although the maximum number of connections for Linux systems is 900, setting the file descriptor limit to 1024 allows some users to use multiple descriptors. Do not change the limit.


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