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From Frank LoVecchio <fr...@isidorey.com>
Subject Re: Schema Questions?
Date Tue, 28 Sep 2010 20:31:44 GMT
I understand adding column family configuration fields using thrift in
Pelops for system_add_column_family, and even renaming column families, but
what about modifying the actual column family configuration values,
e.g. read_repair_chance: 1.0 to read_repair_chance: .5 (as a poor example)?



On Tue, Sep 28, 2010 at 1:17 PM, Peter Schuller <peter.schuller@infidyne.com
> wrote:

> > Question regarding schema set-up and modification:  I just set up the
> newest
> > nightly build of 0.7, imported our .yaml file after starting Cassandra,
> and
> > everything is honky-dorey.  We're not sure if Pelops is capable of
> modifying
> > shema definitions, but it doesn't appear any changes we make to the .yaml
> > file after the initial import go through (re-importing using schematool
> > doesn't work).
>
> Expected in 0.7 where the configuration file is essentially just an
> example:
>
>   http://wiki.apache.org/cassandra/FAQ#no_keyspaces
>   http://wiki.apache.org/cassandra/LiveSchemaUpdates
>
> > How could I change, for example, the rows_cached or name
> > fields below on the fly without losing data?  Is this possible?
>
> Check out the system_* methods at the bottom of
> interface/cassandra.thrift. I believe these are in working order for
> 0.7.
>
> --
> / Peter Schuller
>

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