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From Andrey Ilinykh <ailin...@gmail.com>
Subject Re: Last Modified Time Series in cassandra
Date Fri, 21 Dec 2012 17:37:12 GMT
You can select a column slice (specify time range wich for sure has last
data), but ask cassandra to return only one column. It is latest one. To
have the best performance use reversed sorting order.

Andrey


On Fri, Dec 21, 2012 at 6:40 AM, Ravikumar Govindarajan <
ravikumar.govindarajan@gmail.com> wrote:

> How do we model a timeseries data in cassandra for last modified time?
>
> -- ExampleCF
>        | -- SomeKey = Key
>             | -- TimeUUID = Column-Name
>             | -- PKID = Column-Value
>
> -- ExampleReverseIndexCF
>        | -- SomeKey = Key
>             | -- PKID = Column-Name
>             | -- TimeUUID = Column-Value
>
> To correctly reflect "last-modified-time", I need to read existing
> timeuuid, delete it and add incoming timeuuid
>
> Are there alternatives to the above approach, because it looks a bit
> heavy-weight
>
> --
> Ravi
>

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