Hi all, Please, i'd like to discuss again this question: *What is the motivation for choosing a DHT ring in cassandra? Why not use a normal parallel or distributed file system that supports replication?* @Utkarsh Sengar: *Where in the Dynamo paper is such argumentation?* Did you mean these paragraphs
The Google File System is another distributed file system built for hosting the state of Google’s internal applications. GFS uses a simple design with a single master server for hosting the entire metadata and where the data is split into chunks and stored in chunkservers. distributed storage system designed to handle multiple server failures --> *Question: Because of GFS is centralized, cassandra **With fault tolerance and reliability, gives a faster lookup mechanism across various nodes in a cluster ?* Thank you so much for answers. It is very intersting for me. Kind regards. 2016-06-30 18:49 GMT+01:00 Utkarsh Sengar <utkarsh2...@gmail.com>: > With fault tolerance and reliability, it also gives a faster lookup > mechanism across various nodes in a cluster. > Amazon's dynamo paper might be a better read to understand the reasoning > behind a DHT based system: http://www.allthingsdistributed.com/ > files/amazon-dynamo-sosp2007.pdf > > On Wed, Jun 29, 2016 at 11:48 PM, Jens Rantil <jens.ran...@tink.se> wrote: > >> Some reasons I can come up with: >> - it would be hard to have tunable read/consistencies/replicas when >> interfacing with a file system. >> - data locality support would require strong coupling to the distributed >> file system interface (if at all possible given that certain sstables >> should live on the same data node). >> - operator complexity both administering a distributed file system as >> well as a Cassandra cluster. This was a personal reason why I chose >> Cassandra instead of HBase for a project. >> >> Cheers, >> Jens >> >> Den ons 29 juni 2016 13:01jean paul <researche...@gmail.com> skrev: >> >>> >>> >>> 2016-06-28 22:29 GMT+01:00 jean paul <researche...@gmail.com>: >>> >>>> Hi all, >>>> >>>> Please, What is the motivation for choosing a DHT ring in cassandra? >>>> Why not use a normal parallel or distributed file system that supports >>>> replication? >>>> >>>> Thank you so much for clarification. >>>> >>>> Kind regards. >>>> >>> >>> -- >> >> Jens Rantil >> Backend Developer @ Tink >> >> Tink AB, Wallingatan 5, 111 60 Stockholm, Sweden >> For urgent matters you can reach me at +46-708-84 18 32. >> > > > > -- > Thanks, > -Utkarsh >
