Sage Weil

Sage Weil
Born (1978-03-17) March 17, 1978
Other names Liewegas
Occupation Software engineer
Employer Red Hat
Known for Ceph

Sage Weil (born March 17, 1978) is the founder and chief architect of Ceph, a distributed storage platform. He also was the creator of WebRing, a co-founder of Los Angeles-based hosting company DreamHost, and the founder and CTO of Inktank. Sage now works for Red Hat as the chief architect of the Ceph project.

Weil earned a Bachelor of Science in computer science from Harvey Mudd College in 2000 and completed his PhD in 2007 at the University of California, Santa Cruz working with Prof. Scott Brandt on consistency protocols, data distribution (CRUSH), and the metadata manager in the Ceph distributed file system. In 2014, he won an O'Reilly Open Source Award.[1]


In May 1994 Sage developed a script based on work by Denis Howe and Giraldo Hierro that became the technology behind WebRing. Sage launched WebRing in June 1995 and eventually sold it to Starseed, Inc. in 1997.


As an undergraduate Sage worked with fellow Harvey Mudd College students Dallas Bethune, Josh Jones, and Michael Rodriguez to build DreamHost. The site was registered and began hosting customers’ sites in 1997. DreamHost incubated and eventually spun off Inktank.[2]


In 2011 Sage co-founded Inktank with (CEO) Bryan Bogensberger as the CTO and technical architect. Inktank was a professional services and support company for the open source Ceph file system.[3] The company was initially funded by DreamHost[4] and later supplemented by Mark Shuttleworth.[5] On 30 April 2014 it was announced that Red Hat would acquire Inktank Storage for $175 Million.[6]


  1. Weil, Sage; Leung, Andrew; Brandt, Scott A.; Maltzahn, Carlos (2007), "RADOS: A Fast, Scalable, and Reliable Storage Service for Petabyte-scale Storage Clusters", Proceedings of the ACM Petascale Data Storage Workshop 2007 (PDSW 07) (pdf) 
  2. Weil, Sage; Brandt, Scott A.; Miller, Ethan L.; Maltzahn, Carlos (2006), "CRUSH: Controlled, Scalable, Decentralized Placement of Replicated Data", Proceedings of SC '06 (pdf) 
  3. Weil, Sage; Brandt, Scott A.; Miller, Ethan L.; Maltzahn, Carlos; Long, Darrell D. E. (2006), "Ceph: A Scalable, High-Performance Distributed File System", Proceedings of the 7th Conference on Operating Systems Design and Implementation (OSDI '06) (pdf) 
  4. Weil, Sage; Wang, Feng; Xin, Qin; Brandt, Scott A.; Miller, Ethen L.; Long, Darrell D. E. (2006), "Ceph: A Scalable Object-Based Storage System", Technical Report UCSC-SSRC-06-01 (pdf) 
  5. Weil, Sage; Pollack, Kristal; Brandt, Scott A.; Miller, Ethan L. (2004), "Dynamic Metadata Management for Petabyte-Scale File Systems", Proceedings of the 2004 ACM/IEEE Conference on Supercomputing (SC '04) (pdf) 
  6. Weil, Sage; Brandt, Scott A.; Miller, Ethan L. (2004), "Intelligent Metadata Management for a Petabyte-Scale File System", 2nd Intelligent Storage Workshop (pdf) 


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