Just in case, here is a documentation that explains why we have the cluster activation and lists several supported activation options: https://apacheignite.readme.io/docs/cluster-activation <https://apacheignite.readme.io/docs/cluster-activation>
— Denis > On Dec 15, 2017, at 3:43 AM, Alexey Kukushkin <[email protected]> > wrote: > > Manuel, you just need to activate your cluster on startup as the error > message suggests. In addition to the Ignite.active(true) API, there is an > option to use a script: "$IGNITE_HOME/bin/control.sh --activate". > > Whether you need persistence is for you to decide. For me persistence is > needed if: > The data are too big to fit in memory. > You want your data to survive entire cluster going down (not just some nodes, > which is addressed by configuring backups). > You do not want to spend time for initial data load. > You have legal requirements to persist data (like bank transactions info) > For me typical web session data do not require persistence since they should > fit in memory, you can configure backups for fault tolerance and there are no > legal requirements to persist web data. Maybe you have some specific scenario. > >
