User's Manual

To prevent certificate errors, remote clients must either install OpenManage Essentials certificate in both

CA and Root Certificate Stores or have a custom certificate published to client systems by the domain

administrator.

For a typical installation of OpenManage Essentials:

• Use the local instance of SQL Server that has all supported components.

• The RDBMS is altered to support both SQL and Windows authentication.

• An SQL Server login user is generated for OpenManage Essentials’ services. This login is added as a

RDBMS SQL login with the dbcreator role and given the db_owner role over the ITAssist and

OMEssentials databases.

NOTE: The password for the typical install, auto generated SQL Server login account, is controlled

by the application and different on every system.

For the highest level of security, it is recommended that you use a domain service account that is

specified during custom installation for SQL Server.

At runtime, when the OpenManage Essentials website determines that it has an invalid certificate or

certificate binding; the self-signed certificate is regenerated.

Related Links

Minimum Login Roles for Microsoft SQL Server

Database Size and Scalability

The following table provides information about the changes to the database size in an environment with

2000 devices based on alerts, tasks, and alert actions.

Events Database Size

Initial database size 47.5 MB

After discovery and inventory of 2000 devices 48.5 MB

After 2000 alerts are generated 53.5 MB

After tasks (status polling, OpenManage Server

Administrator deployment tasks, remote tasks, and

system update tasks) against these alerts are

executed

54.5 MB

After deleting all the alerts and sending 20000

alerts with all the alert actions configured

97.2 MB

During the daily maintenance, OpenManage Essentials compresses and optimizes the database.

OpenManage Essentials also downloads updates for managed servers. These updates are saved in the

local file system (not in the database) where OpenManage Essentials is installed.

NOTE: For more information, see the OpenManage Essentials Scalability and Performance technical

white paper at DellTechCenter.com/OME.

Network Bandwidth Utilization

The following table provides information about the network bandwidth utilized by OpenManage

Essentials on a network with a link speed of 1 Gbps.