mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-05 01:01:09 +01:00
102 lines
2.9 KiB
Go
102 lines
2.9 KiB
Go
package storage
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/encoding"
|
|
)
|
|
|
|
// TSID is unique id for a time series.
|
|
//
|
|
// Time series blocks are sorted by TSID.
|
|
//
|
|
// All the fields except MetricID are optional. They exist solely for better
|
|
// grouping of related metrics.
|
|
// It is OK if their meaning differ from their naming.
|
|
type TSID struct {
|
|
// MetricGroupID is the id of metric group.
|
|
//
|
|
// MetricGroupID must be unique.
|
|
//
|
|
// Metric group contains metrics with the identical name like
|
|
// 'memory_usage', 'http_requests', but with different
|
|
// labels. For instance, the following metrics belong
|
|
// to a metric group 'memory_usage':
|
|
//
|
|
// memory_usage{datacenter="foo1", job="bar1", instance="baz1:1234"}
|
|
// memory_usage{datacenter="foo1", job="bar1", instance="baz2:1234"}
|
|
// memory_usage{datacenter="foo1", job="bar2", instance="baz1:1234"}
|
|
// memory_usage{datacenter="foo2", job="bar1", instance="baz2:1234"}
|
|
MetricGroupID uint64
|
|
|
|
// JobID is the id of an individual job (aka service).
|
|
//
|
|
// JobID must be unique.
|
|
//
|
|
// Service may consist of multiple instances.
|
|
// See https://prometheus.io/docs/concepts/jobs_instances/ for details.
|
|
JobID uint32
|
|
|
|
// InstanceID is the id of an instance (aka process).
|
|
//
|
|
// InstanceID must be unique.
|
|
//
|
|
// See https://prometheus.io/docs/concepts/jobs_instances/ for details.
|
|
InstanceID uint32
|
|
|
|
// MetricID is the unique id of the metric (time series).
|
|
//
|
|
// All the other TSID fields may be obtained by MetricID.
|
|
MetricID uint64
|
|
}
|
|
|
|
// marshaledTSIDSize is the size of marshaled TSID.
|
|
var marshaledTSIDSize = func() int {
|
|
var t TSID
|
|
dst := t.Marshal(nil)
|
|
return len(dst)
|
|
}()
|
|
|
|
// Marshal appends marshaled t to dst and returns the result.
|
|
func (t *TSID) Marshal(dst []byte) []byte {
|
|
dst = encoding.MarshalUint64(dst, t.MetricGroupID)
|
|
dst = encoding.MarshalUint32(dst, t.JobID)
|
|
dst = encoding.MarshalUint32(dst, t.InstanceID)
|
|
dst = encoding.MarshalUint64(dst, t.MetricID)
|
|
return dst
|
|
}
|
|
|
|
// Unmarshal unmarshals t from src and returns the rest of src.
|
|
func (t *TSID) Unmarshal(src []byte) ([]byte, error) {
|
|
if len(src) < marshaledTSIDSize {
|
|
return nil, fmt.Errorf("too short src; got %d bytes; want %d bytes", len(src), marshaledTSIDSize)
|
|
}
|
|
|
|
t.MetricGroupID = encoding.UnmarshalUint64(src)
|
|
src = src[8:]
|
|
t.JobID = encoding.UnmarshalUint32(src)
|
|
src = src[4:]
|
|
t.InstanceID = encoding.UnmarshalUint32(src)
|
|
src = src[4:]
|
|
t.MetricID = encoding.UnmarshalUint64(src)
|
|
src = src[8:]
|
|
|
|
return src, nil
|
|
}
|
|
|
|
// Less return true if t < b.
|
|
func (t *TSID) Less(b *TSID) bool {
|
|
// Do not compare MetricIDs here as fast path for determining identical TSIDs,
|
|
// since identical TSIDs aren't passed here in hot paths.
|
|
if t.MetricGroupID != b.MetricGroupID {
|
|
return t.MetricGroupID < b.MetricGroupID
|
|
}
|
|
if t.JobID != b.JobID {
|
|
return t.JobID < b.JobID
|
|
}
|
|
if t.InstanceID != b.InstanceID {
|
|
return t.InstanceID < b.InstanceID
|
|
}
|
|
return t.MetricID < b.MetricID
|
|
}
|