You are close.
On 04/30/2014 12:41 AM, Jimmy Lin wrote:
thanks all for the pointers.
let' me see if I can put the sequences of event together
1.2
people mis-understand/mis-use row cache, that cassandra cached the entire
row of data even if you are only looking for small subset of the row
thanks all for the pointers.
let' me see if I can put the sequences of event together
1.2
people mis-understand/mis-use row cache, that cassandra cached the entire
row of data even if you are only looking for small subset of the row data.
e.g
select single_column from a_wide_row_table
will r
On Tue, Apr 29, 2014 at 1:53 PM, Brian Lam wrote:
> Are these issues 'resolved' only in 2.0 or later release?
>
> What about 1.2 version?
>
As I understand it :
1.2 version has the on-heap row cache and off-heap row cache. It does not
have the new "partition" cache.
2.0 version has only the off
Are these issues 'resolved' only in 2.0 or later release?
What about 1.2 version?
On Apr 29, 2014, at 9:40 AM, Robert Coli wrote:
On Tue, Apr 29, 2014 at 9:30 AM, Jimmy Lin wrote:
> if Cassandra invalidate the row cache upon a single column update to that
> row, that seems very inefficient
On Tue, Apr 29, 2014 at 9:30 AM, Jimmy Lin wrote:
> if Cassandra invalidate the row cache upon a single column update to that
> row, that seems very inefficient.
>
https://issues.apache.org/jira/browse/CASSANDRA-5348?focusedCommentId=13794634&page=com.atlassian.jira.plugin.system.issuetabpanels
>
>
> if Cassandra invalidate the row cache upon a single column update to that
> row, that seems very inefficient.
>
>
>
Yes. For the most recent direction, take a look at:
https://issues.apache.org/jira/browse/CASSANDRA-5357
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder &
hi,
>>> writing a new value to a row will invalidate the row cache for that
value
do you mean the entire row will be invalidate ? or just the column it was
being updated ?
I was reading through
http://planetcassandra.org/blog/post/cassandra-11-tuning-for-frequent-column-updates/
that seems to indi
Hello,
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.
http://www.datastax.com/documentation/cassandra/2.0/cassandra/operations/ops_configuring_caches_c.html?scroll=concept_ds_n35_nnr_ck
Cassandra provides t
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 que
