Return-Path: 
 <user-return-22179-apmail-cassandra-user-archive=cassandra.apache.org@cassandra.apache.org>
X-Original-To: apmail-cassandra-user-archive@www.apache.org
Delivered-To: apmail-cassandra-user-archive@www.apache.org
Received: from mail.apache.org (hermes.apache.org [140.211.11.3])
	by minotaur.apache.org (Postfix) with SMTP id 6ECDC7F76
	for <apmail-cassandra-user-archive@www.apache.org>;
 Wed,  9 Nov 2011 19:18:13 +0000 (UTC)
Received: (qmail 57811 invoked by uid 500); 9 Nov 2011 19:18:11 -0000
Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org
Received: (qmail 57784 invoked by uid 500); 9 Nov 2011 19:18:11 -0000
Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:user-help@cassandra.apache.org>
List-Unsubscribe: <mailto:user-unsubscribe@cassandra.apache.org>
List-Post: <mailto:user@cassandra.apache.org>
List-Id: <user.cassandra.apache.org>
Reply-To: user@cassandra.apache.org
Delivered-To: mailing list user@cassandra.apache.org
Received: (qmail 57776 invoked by uid 99); 9 Nov 2011 19:18:11 -0000
Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136)
    by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 09 Nov 2011 19:18:11 +0000
X-ASF-Spam-Status: No, hits=1.5 required=5.0
	tests=FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS
X-Spam-Check-By: apache.org
Received-SPF: pass (athena.apache.org: domain of vijay2win@gmail.com
 designates 209.85.215.172 as permitted sender)
Received: from [209.85.215.172] (HELO mail-ey0-f172.google.com)
 (209.85.215.172)
    by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 09 Nov 2011 19:18:06 +0000
Received: by eyg24 with SMTP id 24so2046656eyg.31
        for <user@cassandra.apache.org>; Wed, 09 Nov 2011 11:17:45 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=gamma;
        h=mime-version:in-reply-to:references:from:date:message-id:subject:to
         :content-type;
        bh=Z+s/851E1XMrj6AqBzyk9vBB6z2Zh1Zt/+vevB0NIUs=;
        b=WUAmA7olHEJEimNVXifCLRlOET+qPG3LkEFGKqPyl2KpIggsZk4SlQL+sU8FCCHQLY
         5XbjjQq7/vy1QB3shwmDJ6s5zSCQ2ZPjxX79fCkOKNkvGsxDzn3COuTSEpBRS23YkRPH
         h2/Ey5INA0W1xX6XlNzhtMevmEIPIyzZA51oo=
Received: by 10.213.8.71 with SMTP id g7mr296480ebg.108.1320866264133; Wed, 09
 Nov 2011 11:17:44 -0800 (PST)
MIME-Version: 1.0
Received: by 10.213.22.1 with HTTP; Wed, 9 Nov 2011 11:17:23 -0800 (PST)
In-Reply-To: 
 <CALdd-zjvWsd4r7fS8xL0D2JDzP9Vok2+w7u_4wCyPkfGMxKbPg@mail.gmail.com>
References: 
 <CALdd-zjvWsd4r7fS8xL0D2JDzP9Vok2+w7u_4wCyPkfGMxKbPg@mail.gmail.com>
From: Vijay <vijay2win@gmail.com>
Date: Wed, 9 Nov 2011 11:17:23 -0800
Message-ID: 
 <CAFisTNZRRVPzpSfLO4o3NzqJA8--AEU5JwWocLC=zzbTh-TcnQ@mail.gmail.com>
Subject: Re: Second Cassandra users survey
To: user@cassandra.apache.org
Content-Type: multipart/alternative; boundary=0015174c18f2782ebb04b1522494

--0015174c18f2782ebb04b1522494
Content-Type: text/plain; charset=UTF-8

My wish list:

1) Conditional updates: if a column has a value then put column in the
column family atomically else fail.
2) getAndSet: on counters: a separate API
3) Revert the count when client disconnects or receives a exception (so
they can safely retry).
4) Something like a freeze API for updates to a row/CF (this can be used as
a lock).

Regards,
</VJ>



On Tue, Nov 1, 2011 at 3:59 PM, Jonathan Ellis <jbellis@gmail.com> wrote:

> Hi all,
>
> Two years ago I asked for Cassandra use cases and feature requests.
> [1]  The results [2] have been extremely useful in setting and
> prioritizing goals for Cassandra development.  But with the release of
> 1.0 we've accomplished basically everything from our original wish
> list. [3]
>
> I'd love to hear from modern Cassandra users again, especially if
> you're usually a quiet lurker.  What does Cassandra do well?  What are
> your pain points?  What's your feature wish list?
>
> As before, if you're in stealth mode or don't want to say anything in
> public, feel free to reply to me privately and I will keep it off the
> record.
>
> [1]
> http://www.mail-archive.com/cassandra-dev@incubator.apache.org/msg01148.html
> [2]
> http://www.mail-archive.com/cassandra-user@incubator.apache.org/msg01446.html
> [3] http://www.mail-archive.com/dev@cassandra.apache.org/msg01524.html
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of DataStax, the source for professional Cassandra support
> http://www.datastax.com
>

--0015174c18f2782ebb04b1522494
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

My wish list:<div><br><div>1) Conditional updates: if a column has a value =
then put column in the column family atomically else fail.</div><div>2) get=
AndSet: on counters: a=C2=A0separate=C2=A0API</div><div>3) Revert the count=
 when client disconnects or=C2=A0receives=C2=A0a exception (so they can saf=
ely retry).</div>

<div>4) Something like a freeze API for updates to a row/CF (this can be us=
ed as a lock).</div><div><br></div>Regards,<br>&lt;/VJ&gt;<br><br>
<br><br><div class=3D"gmail_quote">On Tue, Nov 1, 2011 at 3:59 PM, Jonathan=
 Ellis <span dir=3D"ltr">&lt;<a href=3D"mailto:jbellis@gmail.com">jbellis@g=
mail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">

Hi all,<br>
<br>
Two years ago I asked for Cassandra use cases and feature requests.<br>
[1] =C2=A0The results [2] have been extremely useful in setting and<br>
prioritizing goals for Cassandra development. =C2=A0But with the release of=
<br>
1.0 we&#39;ve accomplished basically everything from our original wish<br>
list. [3]<br>
<br>
I&#39;d love to hear from modern Cassandra users again, especially if<br>
you&#39;re usually a quiet lurker. =C2=A0What does Cassandra do well? =C2=
=A0What are<br>
your pain points? =C2=A0What&#39;s your feature wish list?<br>
<br>
As before, if you&#39;re in stealth mode or don&#39;t want to say anything =
in<br>
public, feel free to reply to me privately and I will keep it off the<br>
record.<br>
<br>
[1] <a href=3D"http://www.mail-archive.com/cassandra-dev@incubator.apache.o=
rg/msg01148.html" target=3D"_blank">http://www.mail-archive.com/cassandra-d=
ev@incubator.apache.org/msg01148.html</a><br>
[2] <a href=3D"http://www.mail-archive.com/cassandra-user@incubator.apache.=
org/msg01446.html" target=3D"_blank">http://www.mail-archive.com/cassandra-=
user@incubator.apache.org/msg01446.html</a><br>
[3] <a href=3D"http://www.mail-archive.com/dev@cassandra.apache.org/msg0152=
4.html" target=3D"_blank">http://www.mail-archive.com/dev@cassandra.apache.=
org/msg01524.html</a><br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
--<br>
Jonathan Ellis<br>
Project Chair, Apache Cassandra<br>
co-founder of DataStax, the source for professional Cassandra support<br>
<a href=3D"http://www.datastax.com" target=3D"_blank">http://www.datastax.c=
om</a><br>
</font></span></blockquote></div><br></div>

--0015174c18f2782ebb04b1522494--