Rudder

Node configuration serialization is quite large, using a lot of space & memory

{"modes":{"globalPolicyMode":{"mode":"enforce","overridable":true},"globalComplianceMode":"full-compliance","globalHeartbeatPeriod":1,"globalAgentRunInterval":{"interval":15,"startMinute":0,"splayHour":0,"splaytime":4}},"rules":[{"ruleId":"7a57d357-0821-46aa-86b8-b20806915ebf","directives":[{"directiveId":"3be9f8d1-c7ee-4766-8a44-b795762c5899","isSystem":false,"components":[{"componentName":"Variable definition","values":["load148"],"unexpanded":["load148"]}]},{"directiveId":"8d0a6374-baf3-4006-bba9-d2587698199e","isSystem":false,"components":[{"componentName":"File","values":["/tmp/test60"],"unexpanded":["/tmp/test60"]},{"componentName":"Enforce content by section","values":["/tmp/test60"],"unexpanded":["/tmp/test60"]},{"componentName":"Line deletion regular expressions","values":["/tmp/test60"],"unexpanded":["/tmp/test60"]},{"componentName":"Line replacement regular expressions","values":["/tmp/test60"],"unexpanded":["/tmp/test60"]},{"componentName":"Permission adjustment","values":["/tmp/test60"],"unexpanded":["/tmp/test60"]},{"componentName":"Post-modification hook","values":["/tmp/test60"],"unexpanded":["/tmp/test60"]}]},{"directiveId":"77ec2114-8c9b-4839-8cb2-7dd55e665265","isSystem":false,"components":[{"componentName":"File or directory to monitor","values":["/etc/passwd"],"unexpanded":["/etc/passwd"]}]}]},{"ruleId":"inventory-all","directives":[{"directiveId":"inventory-all","isSystem":true,"components":[{"componentName":"inventory","values":["None"],"unexpanded":[]}]}]},{"ruleId":"hasPolicyServer-root","directives":[{"directiveId":"common-root","isSystem":true,"components":[{"componentName":"Update","values":["None"],"unexpanded":["None"]},{"componentName":"ncf Initialization","values":["None"],"unexpanded":["None"]},{"componentName":"Security parameters","values":["None"],"unexpanded":["None"]},{"componentName":"Log system for reports","values":["None"],"unexpanded":["None"]},{"componentName":"CRON Daemon","values":["None"],"unexpanded":["None"]},{"componentName":"Binaries update","values":["None"],"unexpanded":["None"]},{"componentName":"Process checking","values":["None"],"unexpanded":["None"]},{"componentName":"Monitoring","values":["None"],"unexpanded":["None"]}]}]},{"ruleId":"025fc9a2-6185-4f28-ae2e-850e9936a5fb","directives":[{"directiveId":"f894d24b-5646-4fd1-9c6b-c1c7a62dd810","isSystem":false,"components":[{"componentName":"File","values":["/tmp/test102"],"unexpanded":["/tmp/test102"]},{"componentName":"Enforce content by section","values":["/tmp/test102"],"unexpanded":["/tmp/test102"]},{"componentName":"Line deletion regular expressions","values":["/tmp/test102"],"unexpanded":["/tmp/test102"]},{"componentName":"Line replacement regular expressions","values":["/tmp/test102"],"unexpanded":["/tmp/test102"]},{"componentName":"Permission adjustment","values":["/tmp/test102"],"unexpanded":["/tmp/test102"]},{"componentName":"Post-modification hook","values":["/tmp/test102"],"unexpanded":["/tmp/test102"]}]},{"directiveId":"16b7fade-0019-4409-8cde-3c8cc0c5bb19","isSystem":false,"components":[{"componentName":"File","values":["/tmp/test29"],"unexpanded":["/tmp/test29"]},{"componentName":"Enforce content by section","values":["/tmp/test29"],"unexpanded":["/tmp/test29"]},{"componentName":"Line deletion regular expressions","values":["/tmp/test29"],"unexpanded":["/tmp/test29"]},{"componentName":"Line replacement regular expressions","values":["/tmp/test29"],"unexpanded":["/tmp/test29"]},{"componentName":"Permission adjustment","values":["/tmp/test29"],"unexpanded":["/tmp/test29"]},{"componentName":"Post-modification hook","values":["/tmp/test29"],"unexpanded":["/tmp/test29"]}]}]},{"ruleId":"ff6435cf-51fb-4166-add4-1c7b09450498","directives":[{"directiveId":"d64879eb-f338-4dad-9aa2-ac1d20607f74","isSystem":false,"components":[{"componentName":"File","values":["/tmp/test136"],"unexpanded":["/tmp/test136"]},{"componentName":"Enforce content by section","values":["/tmp/test136"],"unexpanded":["/tmp/test136"]},{"componentName":"Line deletion regular expressions","values":["/tmp/test136"],"unexpanded":["/tmp/test136"]},{"componentName":"Line replacement regular expressions","values":["/tmp/test136"],"unexpanded":["/tmp/test136"]},{"componentName":"Permission adjustment","values":["/tmp/test136"],"unexpanded":["/tmp/test136"]},{"componentName":"Post-modification hook","values":["/tmp/test136"],"unexpanded":["/tmp/test136"]}]},{"directiveId":"cf6f12cb-a615-4c58-a387-353645f4755b","isSystem":false,"components":[{"componentName":"File","values":["/tmp/test36"],"unexpanded":["/tmp/test36"]},{"componentName":"Enforce content by section","values":["/tmp/test36"],"unexpanded":["/tmp/test36"]},{"componentName":"Line deletion regular expressions","values":["/tmp/test36"],"unexpanded":["/tmp/test36"]},{"componentName":"Line replacement regular expressions","values":["/tmp/test36"],"unexpanded":["/tmp/test36"]},{"componentName":"Permission adjustment","values":["/tmp/test36"],"unexpanded":["/tmp/test36"]},{"componentName":"Post-modification hook","values":["/tmp/test36"],"unexpanded":["/tmp/test36"]}]}]},{"ruleId":"da89882e-8e4c-4094-aa71-20513217ee24","directives":[{"directiveId":"40b89eb7-aab5-4efa-be47-48c14a395722","isSystem":false,"components":[{"componentName":"Variable definition","values":["load106"],"unexpanded":["load106"]}]},{"directiveId":"cfab773b-e330-445a-bb5a-d97aaaee4a83","isSystem":false,"components":[{"componentName":"File","values":["/tmp/test41"],"unexpanded":["/tmp/test41"]},{"componentName":"Enforce content by section","values":["/tmp/test41"],"unexpanded":["/tmp/test41"]},{"componentName":"Line deletion regular expressions","values":["/tmp/test41"],"unexpanded":["/tmp/test41"]},{"componentName":"Line replacement regular expressions","values":["/tmp/test41"],"unexpanded":["/tmp/test41"]},{"componentName":"Permission adjustment","values":["/tmp/test41"],"unexpanded":["/tmp/test41"]},{"componentName":"Post-modification hook","values":["/tmp/test41"],"unexpanded":["/tmp/test41"]}]}]},{"ruleId":"201ca349-6b49-45a5-a585-751d537dcb62","directives":[{"directiveId":"bad998ed-af31-4692-86a8-233c7b219913","isSystem":false,"components":[{"componentName":"Variable definition","values":["load10"],"unexpanded":["load10"]}]},{"directiveId":"3137011e-534b-4758-81c1-9a3dd63b6893","isSystem":false,"components":[{"componentName":"Variable definition","values":["load50"],"unexpanded":["load50"]}]}]}],"overrides":[]}' )

We could do better than that
We need to change SerializeNodeExpectedReportsComposite and parseJsonNodeExpectedReports , while keeping the parsing compatible with previous versions

Also, we would want to use an efficient json parsing/serialisation lib to avoid inneficiencies.