Yes, we try to rely on conditional batches when possible but in this case
it could not be used :
We did some tests with the conditional batches and they could not be
applied when several tables are involved in the batch, even if the tables
use the same partition key : we had the following error "ba
Again, a lot of potential problems can be solved with data modeling - in
particular consider things like conditional batches where the condition is on a
static cell/column and writes go to different CQL rows.
--
Jeff Jirsa
> On Dec 14, 2017, at 9:57 PM, Mickael Delanoë wrote:
>
> Thanks Je
Thanks Jeff,
I am a little disappointed when you said the guarantee are even weeker.But
I will take a look on this and try to understand what is really done.
Le 13 déc. 2017 18:18, "Jeff Jirsa" a écrit :
Entry point is here: https://github.com/apache/cassandra/blob/trunk/
src/java/org/apache/c
Entry point is here:
https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/cql3/statements/BatchStatement.java#L346
, which will call through to
https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/service/StorageProxy.java#L938-L953
I believe the gua
Hi Nicolas,
Thanks for you answer.
Is your assumption 100% sure ?
Because the few test I did - using nodetools getendpoints - shown that the
data for the two tables when I used the same partition key went to the same
"nodes" . So I would have expected cassandra to be smart enough to apply
them in t
Hi Mickael,
Partition are related to the table they exist in, so in your case, you are
targeting 2 partitions in 2 different tables.
Therefore, IMHO, you will only get atomicity using your batch statement
On 11 December 2017 at 15:59, Mickael Delanoë wrote:
> Hello,
>
> I have a question regard
Hello,
I have a question regarding batch isolation and atomicity with query using
a same partition key.
The Datastax documentation says about the batches :
"Combines multiple DML statements to achieve atomicity and isolation when
targeting a single partition or only atomicity when targeting multi
