I have also added a big part of Loic's discussion of the architecture into the Ceph architecture document here: http://ceph.com/docs/master/architecture/#erasure-coding On Mon, May 19, 2014 at 5:35 AM, <yalla.gnan.kumar at accenture.com> wrote: > Hi Loic, > > Thanks for the reply. > > > Thanks > Kumar > > > -----Original Message----- > From: Loic Dachary [mailto:loic at dachary.org] > Sent: Monday, May 19, 2014 6:04 PM > To: Gnan Kumar, Yalla; ceph-users at lists.ceph.com > Subject: Re: Erasure coding > > Hi, > > The general idea to preserve resilience but save space compared to > replication. It costs more in terms of CPU and network. You will find a > short introduction here : > > > https://wiki.ceph.com/Planning/Blueprints/Dumpling/Erasure_encoding_as_a_storage_backend > > https://wiki.ceph.com/Planning/Blueprints/Firefly/Erasure_coded_storage_backend_%28step_3%29 > > For the next Ceph release Pyramid Codes will help reduce the bandwidth > requirements > https://wiki.ceph.com/Planning/Blueprints/Giant/Pyramid_Erasure_Code > > Cheers > > On 19/05/2014 13:52, yalla.gnan.kumar at accenture.com wrote: > > Hi All, > > > > > > > > What exactly is erasure coding and why is it used in ceph ? I could not > get enough explanatory information from the documentation. > > > > > > > > > > > > Thanks > > > > Kumar > > > > > > > ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ > > > > This message is for the designated recipient only and may contain > privileged, proprietary, or otherwise confidential information. If you have > received it in error, please notify the sender immediately and delete the > original. Any other use of the e-mail by you is prohibited. Where allowed > by local law, electronic communications with Accenture and its affiliates, > including e-mail and instant messaging (including content), may be scanned > by our systems for the purposes of information security and assessment of > internal compliance with Accenture policy. > > > ______________________________________________________________________________________ > > > > www.accenture.com > > > > > > _______________________________________________ > > ceph-users mailing list > > ceph-users at lists.ceph.com > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > -- > Lo?c Dachary, Artisan Logiciel Libre > > > _______________________________________________ > ceph-users mailing list > ceph-users at lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- John Wilkins Senior Technical Writer Intank john.wilkins at inktank.com (415) 425-9599 http://inktank.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140519/3b6c6373/attachment.htm>
 |