High Availability and Distributed Systems

Question

Hello, 
 Anyone know how this can be achieved? 
 docs.appian.com/.../High_Availability_and_Distributed_Installations.html 
 Shared files 
 The following directories must be shared across all servers that run that component. All servers that run the given component need both read and write access to these directories.

omponent Name 
 Folder Name

Application Server 
 APPIAN_HOME/_admin/accdocs1/

Application Server 
 APPIAN_HOME/_admin/accdocs2/

Application Server 
 
 APPIAN_HOME/_admin/accdocs3/

juergeng0002 · Answer

The recommended approach for sharing directories between servers is: 
 
 Set up a central network attached storage server. 
 Create a directory structure on the storage server that mirrors the directories listed in the table above. 
 Replace the above directories on each server with links to the corresponding directory on the network attached storage server.

juergeng0002 · Answer

Hi Nicholas, Yes the syntax of the symbolic link is correct. I assume you are referring to linking directories with the phrase <Server1_ File >. So you are going to point directories on the servers to the NAS which is correct. Regarding the installation - my advise would be: a) Install Appian and let the directories being created by Appian b) Shut the platform down c) If files already exists in those directories, copy them over to the accordingly directory on the NAS d) Create the links for all the directories on the servers e) Restart the Appian Platform and verify everything is working. You might also consider to share the logs as documented here: https://docs.appian.com/suite/help/22.4/High_Availability_and_Distributed_Installations.html#shared-logs 
 Needless to say that the back-up strategy should also include the residing local files for Kafka, Zookeeper, Search Server and Data Server.