private void initZK() {
        db.create(root);
        db.create(nodesPath);
        db.create(applicationsPath);
        db.create(inactiveJobsPath);
        db.create(infrastructureVersionsPath);
        db.create(osVersionsPath);
        db.create(firmwareCheckPath);
        db.create(archiveUrisPath);
        db.create(loadBalancersPath);
        db.create(snapshotsPath);
        provisionIndexCounter.initialize(100);
        loadBalancerPoolHead.initialize(1);
        loadBalancerPoolTail.initialize(1);
    }
Simple cache for deserialized node objects, based on their ZK node version.
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/persistence/CuratorDb.java