Databases in two or more machines

Is there such thing as a master or main databases?
if some one has two or more Macs how does someone know which Mac has the “master” “main” databases? or there is no such thing?

Speaking of databases is it necessary to have an encryption key for the databases? why and why not?

have you read the concept of sync stores and encryption keys in the manual? the explanation there is really good.

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Optional; controlled through each devices sync settings
Databases may be specific to a single device, or sync’d to other devices

For myself, I sync databases via a cloud sync-store
The cloud sync-store is my “master”; holding all databases

My data backups are run on my Mac Mini, so I’ve made sure it holds all databases

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Is there such thing as a master or main databases?
if some one has two or more Macs how does someone know which Mac has the “master” “main” databases? or there is no such thing?

When syncing multiple devices, there is no master database except in the mind of an individual. For example, you may work on a Mac Studio most of the time and treat it as the master copy. But technically speaking, every other device’s copy of the database is at the same status.

Speaking of databases is it necessary to have an encryption key for the databases? why and why not?

As noted in the encryption key field, it’s Recommended though optional. If you have concerns about someone “getting your data”, it’s a way to alleviate that concern but obscuring the content of the sync data.

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Thank you for that explanation.

So if I were to turn iCloud encryption on, wouldn’t that be doing the same thing?

Technically, no. If you’re going to encrypt your sync data, you should use the tool we’ve provided.

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