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From Nathan McCall <n...@vervewireless.com>
Subject Re: Is that possible to write a file system over Cassandra?
Date Fri, 16 Apr 2010 04:04:23 GMT
In regards to hector, please check all the available branches on
github. We have supported 0.6 for a little while now.

http://github.com/rantav/hector/tree/0.6.0

The master is still based on 0.5, but that is changing in the next
couple of days to match the 0.6 release.

-Nate




On Thu, Apr 15, 2010 at 6:35 PM, Jeff Zhang <zjffdu@gmail.com> wrote:
> Jonathan,
>
> Previously we use the cassandra-0.6, but we'd like to leverage the hector
> java client since it has more advanced features. And hector currently only
> support cassandra-0.5.
> Why you think using casandra-0.5 is a stange way to do it ? Is cassandra-0.6
> incompatibility with cassandra-0.5 ? The migration to cassandra-0.6 will
> cost much ?
>
>
> On Thu, Apr 15, 2010 at 11:50 AM, Jonathan Ellis <jbellis@gmail.com> wrote:
>>
>> You forked Cassandra 0.5 for that?
>>
>> That's... a strange way to do it.
>>
>> On Wed, Apr 14, 2010 at 9:36 PM, Jeff Zhang <zjffdu@gmail.com> wrote:
>> > We are currently doing such things, and now we are still at the start
>> > stage.
>> > Currently we only plan to store small files. For large files, splitting
>> > to
>> > small blocks is really one of our options.
>> > You can check out from here http://code.google.com/p/cassandra-fs/
>> >
>> > Document for this project is lack now, but still welcome any feedback
>> > and
>> > contribution.
>> >
>> >
>> >
>> > On Wed, Apr 14, 2010 at 7:32 PM, Miguel Verde <miguelitovert@gmail.com>
>> > wrote:
>> >>
>> >> On Wed, Apr 14, 2010 at 9:26 PM, Avinash Lakshman
>> >> <avinash.lakshman@gmail.com> 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 required, certainly.  However, it strikes me that 1 cluster is
>> >> better
>> >> than 2, and most consumers of a filesystem would expect to be able to
>> >> get an
>> >> ordered listing or tree of the metadata which is easy using the OPP row
>> >> key
>> >> pattern listed previously.  You could still do this with the Random
>> >> partitioner using column names in rows to describe the structure but
>> >> the
>> >> current compaction limitations could be an issue if a branch becomes
>> >> too
>> >> large, and you'd still have a root row hotspot (at least in the schema
>> >> which
>> >> comes to mind).
>> >
>> >
>> > --
>> > Best Regards
>> >
>> > Jeff Zhang
>> >
>
>
>
> --
> Best Regards
>
> Jeff Zhang
>

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