@InterfaceAudience.Public
@InterfaceStability.Unstable
public interface IOStatistics
These are low-cost per-instance statistics provided by any Hadoop I/O class instance.
Consult the filesystem specification document for the requirements of an implementation of this interface.
Modifier and Type | Field and Description |
---|---|
static long |
MAX_UNSET_VALUE
Value when a max value has never been set.
|
static long |
MIN_UNSET_VALUE
Value when a minimum value has never been set.
|
Modifier and Type | Method and Description |
---|---|
Map<String,Long> |
counters()
Map of counters.
|
Map<String,Long> |
gauges()
Map of gauges.
|
Map<String,Long> |
maximums()
Map of maximums.
|
Map<String,MeanStatistic> |
meanStatistics()
Map of meanStatistics.
|
Map<String,Long> |
minimums()
Map of minimums.
|
static final long MIN_UNSET_VALUE
static final long MAX_UNSET_VALUE
Map<String,MeanStatistic> meanStatistics()
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