Ceph erasure coding overhead in a nutshell

Calculating the storage overhead of a replicated pool in Ceph is easy. You divide the amount of space you have by the “size” (amount of replicas) parameter of your storage pool.

Let’s work with some rough numbers: 64 OSDs of 4TB each.

Raw size: 64 * 4  = 256TB
Size 2 ...
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A rant about Supermicro IPMI

Our OS installations are automated for the most part so we don’t need to use IPMI all that much if not for troubleshooting over the KVM virtual console or rebooting servers.

However, I’ve had to use Supermicro’s IPMI a LOT in the last couple days… for a ...

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