ok please find bellow an example: Lets suppose that i have a cassandra cluster of 4 nodes / one DC / replication factor = 4, So in this architecture i have on full copy of the data on each node.
Imagine now that one node have been hacked and in some way with full access to cqlsh session, if data is changed on that node, data will be changed on the three other, am i right ? imagine now that i am able to know (using cryptographic bases) if one column was modified by my API ( => normal way) or not ( => suspicious way), and i want to execute this check function just before any replication of a keyspace to avoid that all the replica will be affected by that and so a rollback will be not easy and the integrity of all the system will be down, the check will for example kill the local cassandra service ... Hope that my question is more clear now. Many thanks for any help. 2017-11-16 21:59 GMT+01:00 Nate McCall <zznat...@gmail.com>: > On Fri, Nov 17, 2017 at 9:11 AM, Abdelkrim Fitouri <abdou....@gmail.com> > wrote: > > Trigger does not resolve my problem because it is not a format validation > > issue but an integrity constraint ... > > > > My purpose is to check data integrity before replication, by returning an > > error and killing the service, so i am killing the node that is supposed > to > > replicate data after a write action ... > > I'm a little confused. Can you provide some specific examples of your > requirements? > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@cassandra.apache.org > For additional commands, e-mail: dev-h...@cassandra.apache.org > > -- Cordialement / Best Regards. *Abdelkarim FITOURI* LPIC/CEH/ITIL System And Security Engineer
