One attachment folder on a NAS should always be used exclusively by one server. If you know that both servers run concurrently and write into the same folder you will not know anymore to which Jira the folders for the individual projects belong too. That might be important if you want to create a backup for an instance with all associated attachments
But if the second server runs a standby instance which only comes into play when the first server crashes it's a perfect setup if the standby instance is configured to use the same attachment path.
in this setup the standby server should be comfigured identical to the primary and also use the same data in it's database as the primary. This could be achieved by continuously replicating the database from the primary to the standby server or by using a dedicated separate database server accessible by both servers or by local database servers using data files on a shared SAN disk which has access paths from both servers. The latter is likely a solution you will find in large data centers
For customer looking for recovery disaster solutions we recommend to use JIRA Data Center and follow the instructions in the link below:
Welcome to your weekly Jira Ops Early Access program update, where we’re sharing news and updates on Jira Ops progress as we work toward our 1.0 release. If you ever want to drop us feedback or ideas...
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