You can use erasure code for your SSDs in Luminous if you're worried about cost per TB.
________________________________ From: ceph-users <ceph-users-boun...@lists.ceph.com> on behalf of Pardhiv Karri <meher4in...@gmail.com> Sent: Friday, 25 May 2018 11:16:07 AM To: ceph-users Subject: [ceph-users] Can Bluestore work with 2 replicas or still need 3 for data integrity? Hi, Can Ceph Bluestore in Luminous work with 2 replicas using crc32c checksum which is more powerful than hashing in filestore versions or do we still need 3 replicas for data integrity? In our current Hammer-filestore environment we are using 3 replicas with HDD but planning to move to Bluestore-Luminous all SSD. Due to the cost of SSD's want to know if 2 replica is good or still need 3. Thanks, Pardhiv Karri
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