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.vanderwa...@tno.nl> > Can you explain then to me what the purpose is of the timestamp? > > > > -----Original Message----- > > From: Jonathan Ellis [mailto:jbel...@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.vanderwa...@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:zyxt...@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.vanderwa...@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
