cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jonathan Lacefield <>
Subject Re: row caching for frequently updated column
Date Tue, 29 Apr 2014 11:43:50 GMT

  Iirc writing a new value to a row will invalidate the row cache for that
value.  Row cache is only populated after a read operation.

  Cassandra provides the ability to "preheat" key and page cache, but I
don't believe this is possible for row cache.

  Hope that helps.


Jonathan Lacefield
Solutions Architect, DataStax
(404) 822 3487


On Mon, Apr 28, 2014 at 10:27 PM, Jimmy Lin <> wrote:

> I am wondering if there is any negative impact on Cassandra write
> operation, if I turn on row caching for a table that has mostly 'static
> columns' but few frequently write columns (like timestamp).
> The application will frequently write to a few columns, and the
> application will also frequently query entire row.
> How Cassandra handle update column to a cached row?
> does it update both memtables value and also the row cached row's
> column(which dealing with memory update so it is very fast) ?
> or in order to update the cached row, entire row need to read back from
> sstable?
> thanks

View raw message