Running OpenDC results in three output files. The first file ([Server](#server)) contains metrics related to the jobs being executed. The second file ([Host](#host)) contains all metrics related to the hosts on which jobs can be executed. Finally, the third file ([Service](#service)) contains metrics describing the overall performance. An experiment in OpenDC has ### Server The server output file, contains all metrics of related to the servers run. | Metric | Datatype | Unit | Summary | |--------------------|----------|--------|-------------------------------------------------------------------------------| | timestamp | int64 | ms | Timestamp of the sample since the start of the workload | | absolute timestamp | int64 | ms | The absolute timestamp based on the given workload | | server_id | binary | string | The id of the server determined during runtime | | server_name | binary | string | The name of the server provided by the Trace | | host_id | binary | string | The id of the host on which the server is hosted or `null` if it has no host. | | mem_capacity | int64 | Mb | | | cpu_count | int32 | count | | | cpu_limit | double | MHz | The capacity of the CPUs of Host on which the server is running. | | cpu_time_active | int64 | ms | The duration that a CPU was active in the server. | | cpu_time_idle | int64 | ms | The duration that a CPU was idle in the server. | | cpu_time_steal | int64 | ms | The duration that a vCPU wanted to run, but no capacity was available. | | cpu_time_lost | int64 | ms | The duration of CPU time that was lost due to interference. | | uptime | int64 | ms | The uptime of the host since last sample. | | downtime | int64 | ms | The downtime of the host since last sample. | | provision_time | int64 | ms | The time for which the server was enqueued for the scheduler. | | boot_time | int64 | ms | The time the server took booting. | ### Host The host output file, contains all metrics of related to the host run. | Metric | DataType | Unit | Summary | |--------------------|----------|------------|-------------------------------------------------------------------------------------------------| | timestamp | int64 | ms | Timestamp of the sample | | absolute timestamp | int64 | ms | The absolute timestamp based on the given workload | | host_id | binary | string | The id of the host given by OpenDC | | cpu_count | int32 | count | The number of available cpuModel cores | | mem_capacity | int64 | Mb | The amount of available memory | | guests_terminated | int32 | count | The number of guests that are in a terminated state. | | guests_running | int32 | count | The number of guests that are in a running state. | | guests_error | int32 | count | The number of guests that are in an error state. | | guests_invalid | int32 | count | The number of guests that are in an unknown state. | | cpu_limit | double | MHz | The capacity of the CPUs in the host. | | cpu_usage | double | MHz | The usage of all CPUs in the host. | | cpu_demand | double | MHz | The demand of all vCPUs of the guests | | cpu_utilization | double | ratio | The CPU utilization of the host. This is calculated by dividing the cpu_usage, by the cpu_limit | | cpu_time_active | int64 | ms | The duration that a CPU was active in the host. | | cpu_time_idle | int64 | ms | The duration that a CPU was idle in the host. | | cpu_time_steal | int64 | ms | The duration that a vCPU wanted to run, but no capacity was available. | | cpu_time_lost | int64 | ms | The duration of CPU time that was lost due to interference. | | power_draw | double | Watt | The current power draw of the host. | | energy_usage | double | Joule (Ws) | The total energy consumption of the host since last sample. | | carbon_intensity | double | gCO2/kW | The amount of carbon that is emitted when using a unit of energy | | carbon_emission | double | gram | The amount of carbon emitted since the previous sample | | uptime | int64 | ms | The uptime of the host since last sample. | | downtime | int64 | ms | The downtime of the host since last sample. | | boot_time | int64 | ms | The time the host took to boot. | ### Service The service output file, contains metrics providing an overview of the performance. | Metric | DataType | Unit | Summary | |--------------------|----------|-------|------------------------------------------------------------------------| | timestamp | int64 | ms | Timestamp of the sample | | absolute timestamp | int64 | ms | The absolute timestamp based on the given workload | | hosts_up | int32 | count | The number of hosts that are up at this instant. | | hosts_down | int32 | count | The number of hosts that are down at this instant. | | servers_pending | int32 | count | The number of servers that are pending to be scheduled. | | servers_active | int32 | count | The number of servers that are currently active. | | attempts_success | int32 | count | The scheduling attempts that were successful. | | attempts_failure | int32 | count | The scheduling attempts that were unsuccessful due to client error. | | attempts_error | int32 | count | The scheduling attempts that were unsuccessful due to scheduler error. |