Hi all, A couple of questions about atomic batch: 1. If an atomic batch (logged batch) contains a bunch of row mutations and all of them have the same partition key, can I assume all those changes have the same isolation as the row-level isolation? According to the post here http://www.mail-archive.com/user%40cassandra.apache.org/msg42434.html, it seems that we can get strong isolation. e.g. *BEGIN BATCH* * UPDATE a IF condition_1;* * INSERT b;* * INSERT c;* *APPLY BATCH*
So at any replica, we expect isolation for the three changes on *a*, *b*, *c* (*a* , *b*, *c* have the same partition key *k1*) -- i.e. either none or all of them are visible. Can someone help confirm? 2. Say in the above batch, we include two extra row mutations d and e for another partition key *k2*. Will the changes on (*a*, *b*, *c*) and (*d*, *e*) still atomic respectively in terms of isolation? I understand there is no isolation between (*a*, *b*, *c*) and (*d*, *e*). I.e. is there a per-parition-key isolation guaranteed? 3. I assume CL SERIAL or LOCAL_SERIAL on reads will try applying the above logged batch if it is committed but not applied. Right? Thanks Yawei
