# Ceph

The current set of G10 Ceph servers (karel, wumpus, and stobar) was acquired in 2018. Each server has 64GB of RAM, an 8-core AMD EPYC processor, 12 4TB hard drives, and two 400GB SSDs. See [here](https://documentation.tjhsst.edu/technologies/storage/ceph) for more info on how they are configured.

[Waitaha](https://documentation.tjhsst.edu/machines/ceph/waitaha), [Barrel](https://documentation.tjhsst.edu/machines/ceph/barrel), and [Valdes](https://documentation.tjhsst.edu/machines/ceph/valdes) make up the failover Ceph cluster.  The OSD disks themselves are on the [Apocalypse](https://documentation.tjhsst.edu/obsolete/apocalypse) array.

## History

The current Ceph servers were purchased in the summer of 2018 along with [Overlord](https://documentation.tjhsst.edu/machines/vm-servers/overlord), [Torch](https://documentation.tjhsst.edu/machines/vm-servers/torch), and [Waverider](https://documentation.tjhsst.edu/machines/vm-servers/waverider) (see [2018 Server Purchases](https://documentation.tjhsst.edu/machines/history/2018-purchases)).

After the events of the [Cephpocalypse](https://documentation.tjhsst.edu/machines/history/2018-cephpocalypse), karel, wumpus, and stobar became the new Ceph cluster. For a period of time, wumpus was running Ubuntu 16.04 LTS, leading to high latencies on the entire cluster. The ability to take it down (in the middle of a school day) to upgrade it (to 18.04 LTS with a newer kernel) is a testament to the fault-tolerancy and redundancy of Ceph.