Hi,
I need to import a new crushmap in production (the old one is the default one) to define two datacenters and to isolate SSD from SATA disk. What is the best way to do this without starting an hurricane on the platform ?
Till now, i was just using hosts (SATA OSD) on one datacenter with the default rule so i create a new rule in the new crushmap to do the same job on one datacenter on a defined SATA chassis. Here is the process I'm going to follow but i really need your advice :
1 - set the noout flag
2 - import the new crushmap
3 - change the rule number for the existing pool to the new one
4 - unset the noout flag
5- pray ...
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