# 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](/technologies/storage/ceph.md) for more info on how they are configured. [Waitaha](/machines/ceph/waitaha.md), [Barrel](/machines/ceph/barrel.md), and [Valdes](/machines/ceph/valdes.md) make up the failover Ceph cluster. The OSD disks themselves are on the [Apocalypse](/obsolete/apocalypse.md) array. ## History The current Ceph servers were purchased in the summer of 2018 along with [Overlord](/machines/vm-servers/overlord.md), [Torch](/machines/vm-servers/torch.md), and [Waverider](/machines/vm-servers/waverider.md) (see [2018 Server Purchases](/machines/history/2018-purchases.md)). After the events of the [Cephpocalypse](/machines/history/2018-cephpocalypse.md), 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. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://documentation.tjhsst.edu/machines/ceph.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.