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  1. Connection Establish { "type":"client/slave" }

  2. Message Format for Create User { "purpose":"create_user", "username":"", "password":"" }

  3. Login { "purpose":"login", "username":"", "password":"" }

  4. Logout { "purpose":"logout", "username":"" }

  5. Get { "purpose":"get", "key":"" }

  6. Get Response { "value":"If value exist then value else failure" }

  7. Create_user Response { "value":"exists/success" }

  8. Delete { "purpose":"delete", "key":"" }

  9. Delete Response { "purpose":"delete", "value":"success/failure/nexists" }

  10. Put { "purpose":"put", "key":"", "value":"" }

    Put Response { "purpose":"put" "response":"Success/Exists" }

  11. Update { "purpose":"update", "key":"", "value":"" }

    Update Response { "purpose":"update", "value":"exists/added/failure" }

  12. Value in Put/Update (Nested JSON String) { "col_name":"col_value", "col_name":"col_value", . . . }

  13. Put Response { "value":"success/exists/failure" }

  14. Update Response { "value":"success/failure" }

  15. HeartBeat { "purpose":"heartbeat" }

  16. Connection Termination { "purpose":"termination" }

  17. Migration msg1: From coor. to slave { "purpose":"migration", "task":"get", "ip":"", "port":"", "what":"prev/curr", "addTo":"prev/curr" } msg2: From slave to slave { "purpose":"migration", "task":"send", "what":"prev/curr" } msg3: From coord. to slave { "purpose":"migration", "task":"merge" }

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