In a terracotta server array where failover-priority is AVAILABILITY, do we shutdown active terrracotta server first or passive terrracotta server first ?

The last known active server should be re-started first to avoid availability issue. Once it is re-started, you can do random restart of remaining Terracotta array.

I hope it helps.

suppose it is shutdown and startup ?

so I would stop last active - first, then stop passive next. 

how would about start ? last passive first and then last active next ?

Hi,

Preferably the order should be :

1. Shutdown : Passive TC First followed by Active TC
2. StartUp : Last Active TC First followed by Passive TC

When stopping and starting two servers in a Terracotta stripe, it is always recommended to stop the Mirror server before the Active, and start the Active server first.

This ensures the Mirror server doesn't unintentionally become the Active server.