RozoFS

RozoFS
Developer(s)	Rozo Systems, SAS.
Stable release	2.5.1 / 26 February 2018
Written in	C and Python
Operating system	Linux, Mac OS X, NetBSD, FreeBSD, OpenSolaris
Type	Distributed file system
License	GNU General Public License v2
Website	www.rozosystems.com

RozoFS is a free software distributed file system. It comes as a free software, licensed under the GNU GPL v2. RozoFS uses erasure coding for redundancy.^[1]^{[improper synthesis?]}

Design

Rozo provides an open source POSIX filesystem, built on top of distributed file system architecture similar to Google File System, Lustre or Ceph. The Rozo specificity lies in the way data is stored. The data to be stored is translated into several chunks using Mojette Transform^[2] and distributed across storage devices in such a way that it can be retrieved even if several pieces are unavailable. On the other hand, chunks are meaningless alone.^[3] Redundancy schemes based on coding techniques like the one used by RozoFS allow to achieve significant storage savings as compared to simple replication.^[4]^[5]

The file system comprises three components:

Exports server — (Meta Data Server) manages the location (layout) of chunks (managing capacity load balancing with respect to high availability), file access and namespace (hierarchy). Multiple replicated metadata servers are used to provide failover. The Exports server is a user-space daemon; the metadata are stored synchronously to a usual file system (the underlying file system must support extended attributes).
Storage servers — (Chunk Server) store the chunks. The Chunk server is also a user-space daemon that relies on the underlying local file system to manage the actual storage.
Clients — talk to both the exports server and chunk servers and are responsible for data transformation. Clients mount the file system into user-space via FUSE.

References

^ ZHANG, Z.; DESHPANDE, A.; MA, X.; THERESKA, E. & NARAYANAN (May 2010). "Does erasure coding have a role to play in my data center?" (PDF). Tech. Rep. MSR-TR-2010-52. Microsoft Research.
^ Jeanpierre, Guédon (2009). The Mojette Transform theory and applications. ISTE-WILEY. ISBN 9781848210806.
^ J. P. Guédon; B. Parrein; N. Normand (August 2001). "Secure Distributed Storage based on the Mojette transform". Integrated Computer-Aided Engineering V.8 N.3: 205–214. doi:10.3233/ICA-2001-8303.
^ Weatherspoon, Hakim & Kubiatowicz, John (2002). "Erasure Coding Vs. Replication: A Quantitative Comparison". Revised Papers from the First International Workshop on Peer-to-Peer Systems. IPTPS '01. Springer-Verlag: 328–338.
^ Rodrigues, Rodrigo & Liskov, Barbara (2005). "High Availability in DHTS: Erasure Coding vs. Replication". Peer-to-Peer Systems IV. IPTPS'05. Vol. 3640. Springer-Verlag. pp. 226–239. CiteSeerX 10.1.1.59.6053. doi:10.1007/11558989_21. ISBN 978-3-540-29068-1. {{cite book}}: |journal= ignored (help)

Press articles

Storage Insider "Innovative Ansätze hauchen Scale-out NAS neues Leben ein" article July 2016
Storage Insider "Storage-Startups: Die nächste Welle rollt" article July 2016
CDP Blog "A new iteration to make Erasure Coding universal" article May 2016
Storage Newsletter "MemoScale With New Iteration to Make Erasure Coding Universal" article May 2016
The Register "Could Rozo squeeze into the scale-out NAS-object scalability gap?" article Dec. 2015
Le Monde Informatique "Rozo passe à l'erasure coding 128 bits pour la v2 de son NAS distribué" article Dec. 2015
Le Mag IT (TechTarget) "Rozo Systems dévoile la version 2.0 de sa technologie NAS distribuée" article Dec. 2015
Storage Newsletter "V2.0 of RozoFS Scale-Out NAS Software" article Dec. 2015
Silicon.fr "OpenIO, Outpace.io et Rozo: le stockage made in France s’exporte aux US" article Dec. 2015
The Register "Big Blue boosts Spectrum Scale, polishes the parallel file systems" article Dec. 2015
ChannelNews "OpenIO et Rozo Systems, les deux pépites françaises du SDS" article Nov. 2015
The Register "French upstart Rozo: Magic beans will help us become storage giant" article Oct. 2015
Storage Newsletter "Start-Up Profile: Rozo Systems in Software-Defined Scale-Out NAS" article Oct. 2015
Le Monde Informatique "La start-up française Rozo Systems recrute dans la Silicon Valley" article Oct. 2015

External links

RozoFS official website
RozoFS project on GitHub
RozoFS blog

[1] ZHANG, Z.; DESHPANDE, A.; MA, X.; THERESKA, E. & NARAYANAN (May 2010). "Does erasure coding have a role to play in my data center?" (PDF). Tech. Rep. MSR-TR-2010-52. Microsoft Research.

[2] Jeanpierre, Guédon (2009). The Mojette Transform theory and applications. ISTE-WILEY. ISBN 9781848210806.

[3] J. P. Guédon; B. Parrein; N. Normand (August 2001). "Secure Distributed Storage based on the Mojette transform". Integrated Computer-Aided Engineering V.8 N.3: 205–214. doi:10.3233/ICA-2001-8303.

[4] Weatherspoon, Hakim & Kubiatowicz, John (2002). "Erasure Coding Vs. Replication: A Quantitative Comparison". Revised Papers from the First International Workshop on Peer-to-Peer Systems. IPTPS '01. Springer-Verlag: 328–338.

[5] Rodrigues, Rodrigo & Liskov, Barbara (2005). "High Availability in DHTS: Erasure Coding vs. Replication". Peer-to-Peer Systems IV. IPTPS'05. Vol. 3640. Springer-Verlag. pp. 226–239. CiteSeerX 10.1.1.59.6053. doi:10.1007/11558989_21. ISBN 978-3-540-29068-1. {{cite book}}: |journal= ignored (help)

RozoFS

Design

See also

References

Press articles

External links