[GitHub] [incubator-pegasus] empiredan opened a new issue, #1334: Feature(new_metrics): migrate replica-level metrics for capacity_unit_calculator

["empiredan (via GitHub)" <gi...@apache.org>]

empiredan opened a new issue, #1334:
URL: https://github.com/apache/incubator-pegasus/issues/1334

   As is described in https://github.com/apache/incubator-pegasus/issues/1326, the constructor of `capacity_unit_calculator` has a parameter of `replica_base`, which owns the *replica* entity that can be used to instantiate replica-level metrics for `capacity_unit_calculator`.
   
   Following metrics are the members of `capacity_unit_calculator` ([capacity_unit_calculator.cpp](https://github.com/apache/incubator-pegasus/blob/master/src/server/capacity_unit_calculator.cpp)), which is created at `pegasus_server_impl::start()`. Their variables in current source files and new types/computations in new framework are listed as below:
   
   | Variables | Types/Computations |
   | :--------: | :--------------------: |
   | _pfc_recent_read_cu |  increase(Counter) |
   | _pfc_recent_write_cu|  increase(Counter) |
   | _pfc_get_bytes | rate(Counter) |
   | _pfc_multi_get_bytes | rate(Counter)  |
   | _pfc_batch_get_bytes | rate(Counter)  |
   | _pfc_scan_bytes | rate(Counter)  |
   | _pfc_put_bytes | rate(Counter)  |
   | _pfc_multi_put_bytes | rate(Counter)  |
   | _pfc_check_and_set_bytes | rate(Counter) |
   | _pfc_check_and_mutate_bytes | rate(Counter) |
   | _pfc_backup_request_bytes | rate(Counter) |


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