jiangpengcheng commented on issue #3071: delete old activations doesn't free disk space URL: https://github.com/apache/incubator-openwhisk/issues/3071#issuecomment-349890597 below is my thought with rolling update deployment: 1. create continuous replication of activations database with selector: ```json { ... "selector": { "start": { "$gte": "1512630323343" } } ... } ``` 2. create new replication from new database to old one, then the replication is bidirectional 3. configure new deployment using new activation database 4. start deployment, the new component will use new database, and old ones still use old database, as the two database are replicated between each other, so it's ok to use different database 5. after deployment is over, the old database is useless, we can delete it
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