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From Michael Pearson <>
Subject Re: column sizes (was: online codes (?))
Date Wed, 03 Feb 2010 22:49:54 GMT
Thanks for the Gossip note, I'll keep reading up on the protocols.
For key/column/disk I meant in terms of the Cassandra limitation -

"The main limitation on column and supercolumn size is that all data
for a single key and column must fit (on disk) on a single machine in
the cluster."

Is it right to think an entire supercolumn (so, possibly a very wide
supercolumn of large object columns depending on the applications data
model) needs to fit on a single node or am I off the mark.


On Thu, Feb 4, 2010 at 8:28 AM, Jonathan Ellis <> wrote:
> On Wed, Feb 3, 2010 at 4:25 PM, Michael Pearson <> wrote:
>> I'd imagine the gossip overhead and key/column per disk limitation is
>> too open for abuse to recommend storing lob columns with any level of
>> predictability, particularly if frequent updates are involved.
> Gossip overhead is constant for a given cluster size.  What do you
> mean by key/column per disk limitation?
> -Jonathan

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