Server Failover Concepts
89
Server Run Modes
An EMS server running in a Server Failover setup will run in either Active
or Dormant mode.
Active
The Active server is the server that all EMS clients connect to. It runs all
the EMS operations and is the only EMS server that writes to the EMS
database and filesystem.
Dormant
The Dormant server is an EMS server which during its startup sequence
has detected an Active server and has opened a connection to it. EMS
clients cannot connect to the Dormant server. The Dormant server does
not write to the database but it does read from the database when
notified by the Active server to ensure its picture of the database is
up-to-date. In the event of a failure the Dormant server then becomes the
Active server.
EMS_FILEHOME
EMS_FILEHOME
lets you specify a 'base directory' for the EMS server to
locate its files. This is how two servers share a common set of files and
directories and thus remove the need for file synchronization.
The
local_server.properties
file installed as part of the EMS server
installation contains this explanatory header:
###### EMS Files Location #######
##Specify a base directory from which the EMS server should
locate its files
#EMS_FILESHOME=\\\\149.112.120.120\\Program Files\\3Com\\EMS
# Specifying a local directory on a windows machine:
#EMS_FILEHOME=G:\\ems_file_home\\
The
EMS_FILEHOME
property is used by the EMS server when locating
the files and directories shared by the two servers:
■
<EMS_FILEHOME>/backups
■
<EMS_FILEHOME>/configuration_backup
■
<EMS_FILEHOME>/goldenConfigs
■
<EMS_FILEHOME>/goldenTemplates
■
<EMS_FILEHOME>/telnetscripts
■
<EMS_FILEHOME>/software_upgrades
■
<EMS_FILEHOME>/server.properties
Summary of Contents for 3CR15600 - Enterprise Management Suite
Page 12: ...12 ...
Page 16: ...16 ABOUT THIS GUIDE ...
Page 40: ...40 CHAPTER 1 PRODUCT OVERVIEW ...
Page 54: ...54 CHAPTER 2 PRE INSTALLATION ...
Page 100: ...100 CHAPTER 4 SERVER FAILOVER CONFIGURATION ...
Page 123: ...Schedulable GUI Based Device Discovery 123 Figure 32 Session Preferences Discovery Tab Boxes ...
Page 132: ...132 CHAPTER 6 GUI CLIENT CONFIGURATION ...
Page 166: ...166 CHAPTER 9 NETWORK MANAGEMENT PLATFORM INTEGRATION CONFIGURATION ...
Page 206: ...206 CHAPTER 10 OPERATIONS ...
Page 212: ...212 APPENDIX A COMMAND LINE INTERFACE REFERENCE ...
Page 218: ...218 INDEX ...