Server Stability, Persistence and Backups

[flimsypremise 94]

Having never run my own DayZ server, I only have a vague concept of how the persistence mechanic works on the server side. It's my understanding that items that would ordinarily persist over a server restart end up wiped if the server crashes, and since the servers crash pretty frequently, it's very difficult to get items to persist. Is there any way to distinguish whether a particular server is relatively stable? Are there servers that are better about creating regular backups and restoring them after crashes?

[fluxley 2228]

Experienced a server crash on the new experimental earlier today, when i rejoined all the loot was still there.

 

So looks like they may be on top of it already.