# Overview and Status of the Ceph File System

- Institution: CERN
- Department: CERN Computing Seminar
- Speaker: Patrick Donnelly
- Year: 2017
- Language: English
- Subjects: Computer science
- Source: [CERN](https://videos.cern.ch/record/3004710)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

The Ceph file system (CephFS) is the POSIX-compatible distributed file system running on top of Ceph's powerful and stable object store. This presentation will give a general introduction of CephFS and detail the recent work the Ceph team has done to improve its stability and usability. In particular, we will cover directory fragmentation, multiple active metadata servers, and directory subtree pinning to metadata servers, features slated for stability in the imminent Luminous release. This talk will also give an overview of how we are measuring performance of multiple active metadata servers using large on-demand cloud deployments. The results will highlight how CephFS distributes metadata load across metadata servers to achieve scaling.

About the speaker

Patrick Donnelly is a software engineer at Red Hat, Inc. currently working on the Ceph distributed file system. In 2016 he completed his Ph.D. in computer science at the University of Notre Dame with a dissertation on the topic of file transfer management in active storage cluster file systems. He has given talks at conferences including IEEE CCGrid, IEEE CloudCom, IEEE/ACM Supercomputing. .

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## Lectures

1. [Overview and Status of the Ceph File System](https://invisiblenetwork.ai/learn/cern/3004710/0f433cb91bb6), 58 min (CERN's player)