The Overview tab for Teradata Hadoop tasktracker displays detailed information about MapReduce slots, tasks, and shuffle handler use. The tasktracker Overview tab is accessed by clicking the TASKTRACKER row under Components Info.
Slots (Current)
| Slots | Description |
|---|---|
| Map Slots Occupied | Number of occupied map slots out of the total map slots available on the tasktracker |
| Reduce Slots Occupied | Number of occupied reduce slots out of the total reduce slots available on the tasktracker |
Shuffle
| Shuffle | Description | |
|---|---|---|
| Current | Handler Busy % | Percentage of time the handler is busy with the shuffle process |
| Cumulative - Last Hour | Output Bytes | Number of bytes output from shuffle operations in the last hour |
| Failed Outputs | Number of failed shuffle outputs during the last hour | |
| Successful Outputs | Number of successful shuffle outputs during the last hour | |
| Exceptions Caught | Number of shuffle exceptions caught during the last hour | |