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Date: Thu, 29 Apr 2010 18:19:06 +0300
Message-ID: <m2l36a14751004290819nd75478d9v469443a7463c5999@mail.gmail.com>
Subject: Re: Basic Architecture Question
From: David Boxenhorn <david@lookin2.com>
To: user@cassandra.apache.org
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So now we can do any kind of range queries, not just "for getting all keys"
as Jesse said?

On Thu, Apr 29, 2010 at 6:04 PM, Roger Schildmeijer
<schildmeijer@gmail.com>wrote:

> take a look at get_range_slices and start with "".
> then invoke get_range_slices again, but this time use the last key as the
> start key
>
> // Roger Schildmeijer
>
> On 29 apr 2010, at 16.28em, David Boxenhorn wrote:
>
> How do I do that???
>
> On Thu, Apr 29, 2010 at 4:31 PM, Jesse McConnell <
> jesse.mcconnell@gmail.com> wrote:
>
>> apparently there is now range query support for getting all keys using the
>> RP...
>>
>> cheers,
>> jesse
>>
>> --
>> jesse mcconnell
>> jesse.mcconnell@gmail.com
>>
>>
>>
>> On Thu, Apr 29, 2010 at 08:16, David Boxenhorn <david@lookin2.com> wrote:
>> > We want to store objects in Cassandra. In general, the mapping is quite
>> > easy. But for some kinds of objects, we want to be able to read all of
>> them
>> > into memory.
>> >
>> > We want to use random partitioning, which means that we can't do a range
>> > query over keys (is this right?). Is there any way to get ALL the keys
>> > directly (order is not important)? Or do I need to define a separate
>> column
>> > family, and save all the keys in a single column of that family? Or...
>> > something else?
>> >
>>
>
>
>

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<div dir=3D"ltr">So now we can do any kind of range queries, not just &quot=
;for getting all keys&quot; as Jesse said?<br><br><div class=3D"gmail_quote=
">On Thu, Apr 29, 2010 at 6:04 PM, Roger Schildmeijer <span dir=3D"ltr">&lt=
;<a href=3D"mailto:schildmeijer@gmail.com">schildmeijer@gmail.com</a>&gt;</=
span> wrote:<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 style=3D"wor=
d-wrap: break-word;"><div style=3D"margin: 0px;">take a look at get_range_s=
lices and=A0start with &quot;&quot;.=A0</div>
<div style=3D"margin: 0px;">then invoke get_range_slices again, but this ti=
me use the last key as the start key</div><div style=3D"margin: 0px;"><br><=
/div><font color=3D"#888888"><div style=3D"margin: 0px;">// Roger Schildmei=
jer</div>
</font><div><div></div><div class=3D"h5"><div><div><br></div><div>On 29 apr=
 2010, at 16.28em, David Boxenhorn wrote:</div><br><blockquote type=3D"cite=
"><div dir=3D"ltr">How do I do that??? <br><br><div class=3D"gmail_quote">O=
n Thu, Apr 29, 2010 at 4:31 PM, Jesse McConnell <span dir=3D"ltr">&lt;<a hr=
ef=3D"mailto:jesse.mcconnell@gmail.com" target=3D"_blank">jesse.mcconnell@g=
mail.com</a>&gt;</span> wrote:<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;">apparently there =
is now range query support for getting all keys using the RP...<br>
<br>
cheers,<br>
jesse<br>
<font color=3D"#888888"><br>
--<br>
jesse mcconnell<br>
<a href=3D"mailto:jesse.mcconnell@gmail.com" target=3D"_blank">jesse.mcconn=
ell@gmail.com</a><br>
</font><div><div></div><div><br>
<br>
<br>
On Thu, Apr 29, 2010 at 08:16, David Boxenhorn &lt;<a href=3D"mailto:david@=
lookin2.com" target=3D"_blank">david@lookin2.com</a>&gt; wrote:<br>
&gt; We want to store objects in Cassandra. In general, the mapping is quit=
e<br>
&gt; easy. But for some kinds of objects, we want to be able to read all of=
 them<br>
&gt; into memory.<br>
&gt;<br>
&gt; We want to use random partitioning, which means that we can&#39;t do a=
 range<br>
&gt; query over keys (is this right?). Is there any way to get ALL the keys=
<br>
&gt; directly (order is not important)? Or do I need to define a separate c=
olumn<br>
&gt; family, and save all the keys in a single column of that family? Or...=
<br>
&gt; something else?<br>
&gt;<br>
</div></div></blockquote></div><br></div>
</blockquote></div><br></div></div></div></blockquote></div><br></div>

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