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Date: Tue, 23 Mar 2010 21:56:27 +0800
Message-ID: <e91bf4471003230656o4f67c2c6j88755b4d5d5c7b19@mail.gmail.com>
Subject: Re: Timestamp for versioning?
From: =?GB2312?B?1cXT7g==?= <zyxt001@gmail.com>
To: user@cassandra.apache.org
Cc: "Waaij, B.D. (Bram) van der" <bram.vanderwaaij@tno.nl>
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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
>
>

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HBase supports the version through the timestamp,but Cassandra not.<br><br>=
<div class=3D"gmail_quote">2010/3/23 Waaij, B.D. (Bram) van der <span dir=
=3D"ltr">&lt;<a href=3D"mailto:bram.vanderwaaij@tno.nl">bram.vanderwaaij@tn=
o.nl</a>&gt;</span><br>
<blockquote class=3D"gmail_quote" style=3D"margin: 0pt 0pt 0pt 0.8ex; borde=
r-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">


<div>


<p><font size=3D"2" face=3D"Arial">Hi there,</font>
</p>

<p><font size=3D"2" face=3D"Arial">Is there already support for doing somet=
hing with the timestamp? I would like to use it as a versioning mechanism o=
f 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 ret=
rieve both versions?</font></p>


<p><font size=3D"2" face=3D"Arial">Looking at the API I can not find such m=
ethod, but perhaps I am missing something as I am new to cassandra. </font>
</p>

<p><font size=3D"2" face=3D"Arial">Best regards,</font>

<br><font size=3D"2" face=3D"Arial">Bram </font>
</p>

<pre>This e-mail and its contents are subject to the DISCLAIMER at <a href=
=3D"http://www.tno.nl/disclaimer/email.html" target=3D"_blank">http://www.t=
no.nl/disclaimer/email.html</a>
</pre></div>
</blockquote></div><br>

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