Combining two Zabbix instances

Note-to-self:

1. Create hosts to the new instance with items you want to monitor
2. Map itemids between instances to specify item data you want to copy from the old instance
3. Copy history(_log,_str,_text, _uint)- and trends(_uint) data, enjoy:

•  INSERT INTO zabbix2.history (itemid,clock,value,ns) SELECT ‘25188’,clock,value,ns FROM zabbix1.history WHERE itemid=’90090000000025470′;
• INSERT IGNORE INTO zabbix2.trends (itemid,clock,num,value_min,value_avg,value_max) SELECT ‘25188’,clock,num,value_min,value_avg,value_max FROM zabbix1.trends where itemid=’90090000000025470′;