When I do a
wp_cache_set( 'some-item', $item, 'my-group' ) on any site of the multisite network, is
some-item available on other blogs, or does every blog have its own "cache domain"?
If cache is local to the current blog only: Is there a simple way to have a shared, network-wide cache?
Could not find anything about this in google or WordPress documentation...
For this question let's assume that there is an object cache plugin or drop-in is installed. (I know that out of the box the wp_cache_set function only caches data for the duration of the current request)