Start XRegion Service

The Xregion service in each region can be started using the xrstart command. The xrstart command has to be executed for each data store separately. The status of the xrstart command execution can be viewed by reading the contents of nohup.out file. To get more details about xrstart command and its various parameters, see xrstart .

Example:

Start the XRegion Service in both the regions, Frankfurt and London.

There are two XRegion Service agents in both the regions, Frankfurt and London. In Frankfurt the XRegion agents are in host1 and host7 and in London, the XRegion agents are in host4 and host8. Both the XRegion agents have to be started in each region.

# Start the first XRegion Service in host1 in the 'fra' Region
[oracle@host1 xrshome]$nohup java -Xms256m -Xmx2048m -jar $KVHOME/lib/kvstore.jar xrstart \
-config <path to the json config file> > \
<path to the home directory of the xregion service>/nohup.out &

[1] 24356
[oracle@host1 xrshome]$ nohup: ignoring input and redirecting stderr to stdout

# View the status of the xrstart command in host1 in the 'fra' Region
[oracle@host1 xrshome]$ cat nohup.out
Cross-region agent (region=fra,store=mrtstore, helpers=[host1:5000, host2:5000, host3:5000]) 
starts up from config file=/home/oracle/xrshome/ json.config at 2019-11-07 08:57:34 UTC

Similarly start the XRegion agent in host 7.

# Start the second XRegion Service in host 7 in the 'fra' Region

[oracle@host7 xrshome]$nohup java -Xms256m -Xmx2048m -jar $KVHOME/lib/kvstore.jar xrstart \
-config <path to the json config file> > \
<path to the home directory of the xregion service>/nohup.out &

[1] 24489
[oracle@host7 xrshome]$ nohup: ignoring input and redirecting stderr to stdout

# View the status of the xrstart command in host7 in the 'fra' Region
[oracle@host7 xrshome]$ cat nohup.out
Cross-region agent (region=fra,store=mrtstore, helpers=[host1:5000, host2:5000, host3:5000]) 
starts up from config file=/home/oracle/xrshome/ json.config at 2023-10-07 08:59:34 UTC

# Start the first XRegion Service in host4 in the 'lnd' Region
[oracle@host4 xrshome]$ nohup java -Xms256m -Xmx2048m -jar $KVHOME/lib/kvstore.jar xrstart \ 
-config <path to the json config file> > \
<path to the home directory of the xregion service>/nohup.out & 

[1] 17587
[oracle@host4 xrshome]$ nohup: ignoring input and redirecting stderr to stdout

# View the status of the xrstart command in host4 in the 'lnd' Region
[oracle@host4 xrshome]$ cat nohup.out
Cross-region agent (region=lnd,store=mrtstore, helpers=[host4:5000, host5:5000, host6:5000]) 
starts up from config file=/home/oracle/xrshome/ json.config at 2019-11-07 08:57:34 UTC

Similarly start the XRegion agent in host8.

# Start the second XRegion Service in host8 in the 'lnd' Region

[oracle@host8 xrshome]$ nohup java -Xms256m -Xmx2048m -jar $KVHOME/lib/kvstore.jar xrstart \ 
-config <path to the json config file> > \
<path to the home directory of the xregion service>/nohup.out & 

[1] 17587
[oracle@host8 xrshome]$ nohup: ignoring input and redirecting stderr to stdout

# View the status of the xrstart command in the 'lnd' Region
[oracle@host8 xrshome]$ cat nohup.out
Cross-region agent (region=lnd,store=mrtstore, helpers=[host4:5000, host5:5000, host6:5000]) 
starts up from config file=/home/oracle/xrshome/ json.config at 2023-10-07 09:09:34 UTC