Hi DIVAKARJEY12,

Theoritically, moving or mounting the entire PegaSearchIndex directory alongwith the index files to another Index host should work provided you have stopped the incoming traffic to existing environment and ensured the Pega-SearchEngine Agent has been gracefully stopped. I do not think you need to re-index from scratch provided the index files are not corrupted or locked. It may not be difficult to try these in a lower environment to see if it works before you have the confidence to do it in production.

~Ankur

Hi Divakar,

We need to decide on the behavior for the various cases around how the new changes interacts with the existing configuration specified through the search landing page. I have listed the scenarios below-

• An existing client node joins with no explicit index directory specified (as a command line argument) --- continue on as a client node in the cluster.
• An existing search node joins with no explicit index directory specified --- continue on as a search node using its already configured index directory.
• A new node joins with no explicit index directory specified --- continue on as a client node.

These three points will ensure that the current functionality works as-is.

• A (new) or (existing client node) joins with an explicit index directory specified (as a command line argument).
  • If it is an empty directory then add this as a search node to the cluster.
  • If it is an existing index directory then-
    • If the directory is locked (i.e. it is associated with a different node) then log an error and continue as a client node.
    • If the directory is available then remove the configuration for the previous node that was associated to this directory from the system and add this as a search node.

• An existing search node joins with an explicit index directory specified (as a command line argument).
  • Approach-1
    • If the explicit index directory is the same as the already configured directory for this node, then continue as a search node.
    • Else log an error and continue as a search node with its existing index directory configuration.

  • Approach-2
    • If an empty index directory is specified then reconfigure this as a search node that uses the explicit index directory.
    • If it is an existing index directory then-
      • If the directory is locked then log an error and continue as a search node with its existing index directory configuration.
      • If the directory is available then reconfigure this as a search node that uses the explicit index directory.