Hi, On 6/4/21 12:57 PM, mhnx wrote:
I wonder that when a osd came back from power-lost, all the data scrubbing and there are 2 other copies. PLP is important on mostly Block Storage, Ceph should easily recover from that situation. That's why I don't understand why I should pay more for PLP and other protections.
I'm no expert (or power user) al all, but my reasoning is: if something power-related can take down one of my servers it can just as easily take down *all* my ceph servers at once. And that could just as easily render all three copies inacessible. Plus how I understand it also: using SSDs with PLP also reduces latency, as the SSDs don't need to flush after each write. (but again: this i my understanding, and I am no expert on the subject)