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Security / Authentication
One of VCM's primary roles is multi-system administration. Therefore, VCM must be granted authority to
act as an administrator on all the machines under its control. Similarly, the number of places where that
authority may be removed or truncated is equally large. Common authentication problems may include
changing passwords, dropped administration access, and implementation of additional security measures
(such as a proxy server) without updating VCM. System access is only half of the access required by VCM.
VCM also requires access to the SQL Server database, with the authority to insert, modify, and delete data
within it. Access problems of both sorts may reveal themselves in the UI, in the Event Viewer, as well as in
the debug log. Screenshots of UI errors combined with debug logs are the best information to send
VMware Customer Support when reporting problems. Below is an example of an authentication error
found in the Event Viewer.
SQL Server
Nearly all data associated with VCM is stored in the SQL database. The VCM database contains the
collected system data from the VCM Agents.The VCM_Coll database contains information about the UI,
such as Collector settings and options. The VCM_Raw database is a performance-enhancing database used
to temporarily store information from collections before bulk insertion into the VCM database. Finally,
the VCM_UNIX database contains collected information from any UNIX Agents in the customer’s
environment. SQL Server errors may include resource problems, disk space problems, or authentication
problems, among others. Improper tuning of a SQL Server also may cause performance problems such as
data bottlenecks. Evidence of SQL Server errors may appear in the UI or in the debug log, but messages
directly relating to the SQL Server should appear in the SQL Server logs. If you suspect a SQL Server error,
the SQL Server logs, the system and application Event Logs, and the VCM debug log are the most helpful
sources of information for VMware Customer Support. Below is one example of an error you may see
associated with SQL Server.
VCM Troubleshooting Guide
14 VMware, Inc.
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