[ceph-users] Re: Erasure vs replica

Now 25 years later lot of people recommend to use replica so if I buy XTo I'm only going to have X/3 To (vs raidz2 where I loose 2 disks over 9-12 disks).

As seen from other answers, it changes which performance and space usage you want go have, but there are other factors too. Replica = 3 (or larger) will be as fast when one (or more) of the replicas is missing, but EC needs to start to do math on the data from one or more of the checksum shards before it can return data to the client, so they degrade differently also. It is never as easy as "one size fits all", the tradeoffs have multiple dimensions. -- May the most significant bit of your life be positive.