# Installation Guide

### Setting up EMSRV for AIX

On AIX, you must enable large file support for both the volume hosting a repository and the user starting the EMSRV process. When creating a filesystem, ensure that the arguments `-o bf=true` are used with mkfs.

To set the limits for the user starting the EMSRV process, specify the number of 512 byte blocks as arguments on the `-Hf` and `-Sf` options of the ulimit command. Use the following commands to enable repositories up to 16 GB in size:

    ulimit -Hf 33554432
    ulimit -Sf unlimited

EMSRV for AIX authentication is implemented using the system `authenticate()` function. This allows one EMSRV executable to support both shadowed and non-shadowed passwords in addition to DCE authentication. The authentication method for each user is set in the `/etc/security/user` file.

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