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From Brandon Williams <>
Subject Re: Strategies for storing lexically ordered data in supercolumns
Date Sat, 13 Mar 2010 01:50:34 GMT
On Fri, Mar 12, 2010 at 7:46 PM, Peter Chang <> wrote:

> Yes, I can update that one entry. But what if that subcolumn key is used
> across many different places?
> ['Jones-Bob']['connections']
> ['Hacker-Alyssa-1ab54760-2ca8-11df-aabd-005056c00001']
> ['Crabtree-Sam']['connections']
> ['Hacker-Alyssa-1ab54760-2ca8-11df-aabd-005056c00001']
> ['Rice-Brown']['connections']
> ['Hacker-Alyssa-1ab54760-2ca8-11df-aabd-005056c00001']
> ...
> I can update every single entry but now I need to keep track of them (which
> I guess I'm doing anyway). I was wondering if there was a more elegant
> solution but it seems unlikely based on the given constraints.

You have to update them all and track them, correct.  What you're looking
for sounds like transaction support, which Cassandra does not have.  On the
bright side, writes are cheap.


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