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From Erik Holstad <erikhols...@gmail.com>
Subject Re: Timestamp for versioning?
Date Tue, 23 Mar 2010 14:46:14 GMT
If I'm not totally mistaken the timestamp is used for conflict resolution on
the server.

Have a look at:
http://wiki.apache.org/cassandra/DataModel for more info



2010/3/23 Waaij, B.D. (Bram) van der <bram.vanderwaaij@tno.nl>

> Can you explain then to me what the purpose is of the timestamp?
>
>
> > -----Original Message-----
> > From: Jonathan Ellis [mailto:jbellis@gmail.com]
> > Sent: dinsdag 23 maart 2010 15:35
> > To: user@cassandra.apache.org
> > Subject: Re: Timestamp for versioning?
> >
> > No, we're not planning to add support for retrieving old versions.
> >
> > 2010/3/23 Waaij, B.D. (Bram) van der <bram.vanderwaaij@tno.nl>:
> > > Are there any plans to add versioning in the near future to
> > cassandra?
> > >
> > > What is the purpose of the timestamp in the current implementation?
> > >
> > > Best regards,
> > > Bram
> > >
> > > ________________________________
> > > From: 张宇 [mailto:zyxt001@gmail.com]
> > > Sent: dinsdag 23 maart 2010 14:56
> > > To: user@cassandra.apache.org
> > > Cc: Waaij, B.D. (Bram) van der
> > > Subject: Re: Timestamp for versioning?
> > >
> > > HBase supports the version through the timestamp,but Cassandra not.
> > >
> > > 2010/3/23 Waaij, B.D. (Bram) van der <bram.vanderwaaij@tno.nl>
> > >>
> > >> Hi there,
> > >>
> > >> Is there already support for doing something with the timestamp? I
> > >> would like to use it as a versioning mechanism of the
> > value belonging
> > >> to a certain key. When i store a column with the same key,
> > different
> > >> value and different timestamp, would i still be able to
> > retrieve both versions?
> > >>
> > >> Looking at the API I can not find such method, but perhaps I am
> > >> missing something as I am new to cassandra.
> > >>
> > >> Best regards,
> > >> Bram
> > >>
> > >> This e-mail and its contents are subject to the DISCLAIMER at
> > >> http://www.tno.nl/disclaimer/email.html
> > >
> > > This e-mail and its contents are subject to the DISCLAIMER at
> > > http://www.tno.nl/disclaimer/email.html
> > >
> >
> This e-mail and its contents are subject to the DISCLAIMER at
> http://www.tno.nl/disclaimer/email.html
>



-- 
Regards Erik

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