incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Vijay <>
Subject Re: Is that possible to write a file system over Cassandra?
Date Thu, 15 Apr 2010 06:49:15 GMT
What I did for one of our project was similar.... Use super col to strore
files and dir metadata.... use another row(Key UUID) to store the dir
contents (Files and subdirectory). we used UUID instead of paths because
there will be rename or move.... store the small files in cassandra....

We used Internally developed filesystem to store the big files which are
more than x bytes.... Locking is done using Zookeeper and queuing by zeromq.


On Wed, Apr 14, 2010 at 9:39 PM, Tatu Saloranta <>wrote:

> On Wed, Apr 14, 2010 at 7:26 PM, Avinash Lakshman
> <> wrote:
> > OPP is not required here. You would be better off using a Random
> partitioner
> > because you want to get a random distribution of the metadata.
> Not for splitting, but for actual file system hierarchy it would. How
> else would you traverse hierarchy? (list sub-directiories, files)
> As to splitting files, yes, can be done, but I personally think that
> would be asking for trouble because of lack atomicity for operations.
> Exception being if only operations ever would be append.
> -+ Tatu +-

View raw message