I did a backup yesterday of AEM 6.2, a simple AEM quickstart. Through the JMX interface:
URL: http://localhost:4502/system/console/jmx/com.adobe.granite%3Atype%3DRepository (startBackup(java.lang.String target))
I was watching the backup progress before leaving for the day using:
It was at 20% around 3:30 pm EST. I came in this morning, and it showed that it had completed at 23:26:16 EST
Question: Should I expect 8 hrs for a backup?
Question: Should I expect more than 8 hours?
Question: What should I be telling my customer? (Immigration, Refugees and Citizenship Canada)
P.S. It did appear to work. I was able to unzip it and use it.
I guess you triggered online backup which is supposed to take more time as compared to offline backup.
If you have luxury to stop the server then offline backup will be lot faster, its more like a snapshot backup.
Please go through the link that Scott shared, it will give you more details around the type of backup supported.