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Is there any limit to add users in CLEARCASE_PRIMARY_GROUP?

In Unix/Linux, you can add only up to 32.
Is there any limit on this in windows ClearCase?

VonC
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user2370590
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1 Answers1

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According to this IBM article:

ClearCase does enforce a limitation on the number of ClearCase groups a user may belong to.

The SUNRPC protocol that we use can process a maximum of 32 groups on Windows and 16 groups on Unix.
This means that users in an all Windows environment can have a maximum of 32 groups that can use ClearCase and 16 groups in an all Unix environment or a Windows and Unix interop environment.

By default, ClearCase will recognize only the first 32 groups of a user's group list as displayed by the output of the creds utility on Windows.
The total of 32 groups includes the Windows primary group or CLEARCASE_PRIMARY_GROUP variable and the next 31 groups either from the creds output or from the CLEARCASE_GROUPS variable.

The environment variables, CLEARCASE_GROUPS and CLEARCASE_PRIMARY_GROUP, can help to resolve or alleviate some of the issues that may arise due to this limitation.

VonC
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  • Suppose there are total 60 people in CLEARCASE_PRIMARY_GROUP and I want to add more people in it but theese people are already there in CLEARCASE_GROUPS, will it make any different to add or not to add? – user2370590 Jan 31 '14 at 19:04
  • @user2370590 no the limit is for the number of groups a user can be in, not the limit of users you can add in a group. Plus, you don't have to add people to `CLEARCASE_PRIMARY_GROUP`: it is a user environment variable which is set by a user to reference only **one** group: the one that ClearCase will consider as the "primary" one for that user, and which references one of the Windows group that user is registered in. One of the *32* groups, that is, since the limitation (again) is about the numbers of groups a user is registered in. – VonC Jan 31 '14 at 19:10