Following are the Ceph and kernel versions that support given tunables:
| Tunables | Ceph and kernel versions that support given tunables |
| CRUSH_TUNABLES | Argonaut series, v0.48.1 or recent version v0.49 or greater Linux kernel version v3.6 or recent (for the file system and RBD kernel clients) |
| CRUSH_TUNABLES2 | v0.55 or recent, including Bobtail series (v0.56.x) Linux kernel version v3.9 or recent (for the filesystem and RBD kernel clients) |
| CRUSH_TUNABLES3 | v0.78 (Firefly) or recent version CentOS 7.1, Linux kernel version v3.15 or recent (for the filesystem and RBD kernel clients) |
| CRUSH_V4 | v0.94 (Hammer) or recent CentOS 7.1, Linux kernel version v4.1 or recent (for the filesystem and RBD kernel clients) |
| CRUSH_TUNABLES5 | v10.2.0 (Jewel) or recent CentOS 7.3, Linux kernel version v4.5 or recent (for the filesystem and RBD kernel clients) |