Backend server installation and update¶

Requirements and prerequisites¶

Backend server minimal requirements are the same as for WCS, except for disk storage - greater is better, if the database is on the same server.

One of recommended time series DBs should be installed to store stream metric values, and SQL DB should be installed to store stream history data (Postgresql is recommended). Database can be on the same server, or on separate servers.

Backend server installation and update¶

To install backend server:

Download current version from this page
Replace XXX with an actual buils number

wget https://flashphoner.com/downloads/builds/WCS_OAM/5.2/FlashphonerWebCallServerOAM-1.XXX.tar.gz

Unpack archive

tar -xvzf FlashphonerWebCallServerOAM-1.XXX.tar.gz

Go to folder from archive
```
cd FlashphonerWebCallServerOAM-1.xxx
```
Start installation script and follow its instructions
```
./install.sh
```

Backend server update should be done the same way.

Installation to a different Java versions¶

JDK 12 or 14¶

The following settings should be removed from wcsoam-core.properties file

-XX:+UseConcMarkSweepGC
-XX:+PrintGCDateStamps
-XX:+PrintGCDetails

The following setting

-Xloggc:/usr/local/FlashphonerWebCallServer/logs/gc-core-

should be replaced by

-Xlog:gc*:/usr/local/FlashphonerWebCallServer/logs/gc-core-:time

JDK 15¶

In addition to setting changing for JDK 12 or 14, the following settings should be removed from wcsoam-core.properties file

-XX:+UseCMSInitiatingOccupancyOnly
-XX:CMSInitiatingOccupancyFraction=70