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From Sasha Dolgy <>
Subject Re: limit on rows in a cf
Date Wed, 16 Feb 2011 09:16:26 GMT
Thanks Sylvain

On Wed, Feb 16, 2011 at 10:05 AM, Sylvain Lebresne <>wrote:

> Sky is the limit.
> Columns in a row are limited to 2 billion because the size of a row is
> recorded in a java int. A row must also fit on one node, so this also limit
> in a way the size of a row (if you have large values, you could be limited
> by this factor much before reaching 2 billions columns).
> The number of rows is never recorded anywhere (no data type limit). And
> rows are balanced over the cluster. So there is no real limit outside what
> your cluster can handle (that is the number of machine you can afford is
> probably the limit).
> Now, if a single node holds a huge number of rows, the only factor that
> comes to mind is that the sparse index kept in memory for the SSTable can
> start to take too much memory (depending on how much memory you have). In
> which case you can have a look at index_interval in cassandra.yaml. But as
> long as you don't start seeing node EOM for no reason, this should not be a
> concern.
> --
> Sylvain
> On Wed, Feb 16, 2011 at 9:36 AM, Sasha Dolgy <> wrote:
>> is there a limit or a factor to take into account when the number of rows
>> in a CF exceeds a certain number?  i see the columns for a row can get
>> upwards of 2 billion ... can i have 2 billion rows without much issue?
>> --
>> Sasha Dolgy

Sasha Dolgy

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