mirror of
https://github.com/0glabs/0g-chain.git
synced 2024-12-25 15:55:18 +00:00
112 lines
2.9 KiB
Go
112 lines
2.9 KiB
Go
//go:build rocksdb
|
|
// +build rocksdb
|
|
|
|
package opendb
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
|
|
"errors"
|
|
)
|
|
|
|
// stat represents one line from rocksdb statistics data, stat may have one or more properties
|
|
// examples:
|
|
// - rocksdb.block.cache.miss COUNT : 5
|
|
// - rocksdb.compaction.times.micros P50 : 21112 P95 : 21112 P99 : 21112 P100 : 21112 COUNT : 1 SUM : 21112
|
|
// `rocksdb.compaction.times.micros` is name of stat, P50, COUNT, SUM, etc... are props of stat
|
|
type stat struct {
|
|
name string
|
|
props map[string]string
|
|
}
|
|
|
|
// parseSerializedStats parses serialisedStats into map of stat objects
|
|
// example of serializedStats:
|
|
// rocksdb.block.cache.miss COUNT : 5
|
|
// rocksdb.compaction.times.micros P50 : 21112 P95 : 21112 P99 : 21112 P100 : 21112 COUNT : 1 SUM : 21112
|
|
func parseSerializedStats(serializedStats string) (map[string]*stat, error) {
|
|
stats := make(map[string]*stat, 0)
|
|
|
|
serializedStatList := strings.Split(serializedStats, "\n")
|
|
if len(serializedStatList) == 0 {
|
|
return nil, errors.New("serializedStats is empty")
|
|
}
|
|
serializedStatList = serializedStatList[:len(serializedStatList)-1]
|
|
// iterate over stats line by line
|
|
for _, serializedStat := range serializedStatList {
|
|
stat, err := parseSerializedStat(serializedStat)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
stats[stat.name] = stat
|
|
}
|
|
|
|
return stats, nil
|
|
}
|
|
|
|
// parseSerializedStat parses serialisedStat into stat object
|
|
// example of serializedStat:
|
|
// rocksdb.block.cache.miss COUNT : 5
|
|
func parseSerializedStat(serializedStat string) (*stat, error) {
|
|
tokens := strings.Split(serializedStat, " ")
|
|
tokensNum := len(tokens)
|
|
if err := validateTokens(tokens); err != nil {
|
|
return nil, fmt.Errorf("tokens are invalid: %v", err)
|
|
}
|
|
|
|
props := make(map[string]string)
|
|
for idx := 1; idx < tokensNum; idx += 3 {
|
|
// never should happen, but double check to avoid unexpected panic
|
|
if idx+2 >= tokensNum {
|
|
break
|
|
}
|
|
|
|
key := tokens[idx]
|
|
sep := tokens[idx+1]
|
|
value := tokens[idx+2]
|
|
|
|
if err := validateStatProperty(key, value, sep); err != nil {
|
|
return nil, fmt.Errorf("invalid stat property: %v", err)
|
|
}
|
|
|
|
props[key] = value
|
|
}
|
|
|
|
return &stat{
|
|
name: tokens[0],
|
|
props: props,
|
|
}, nil
|
|
}
|
|
|
|
// validateTokens validates that tokens contains name + N triples (key, sep, value)
|
|
func validateTokens(tokens []string) error {
|
|
tokensNum := len(tokens)
|
|
if tokensNum < 4 {
|
|
return fmt.Errorf("invalid number of tokens: %v, tokens: %v", tokensNum, tokens)
|
|
}
|
|
if (tokensNum-1)%3 != 0 {
|
|
return fmt.Errorf("invalid number of tokens: %v, tokens: %v", tokensNum, tokens)
|
|
}
|
|
if tokens[0] == "" {
|
|
return fmt.Errorf("stat name shouldn't be empty")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// validateStatProperty validates that key and value are divided by separator and aren't empty
|
|
func validateStatProperty(key, value, sep string) error {
|
|
if key == "" {
|
|
return fmt.Errorf("key shouldn't be empty")
|
|
}
|
|
if sep != ":" {
|
|
return fmt.Errorf("separator should be :")
|
|
}
|
|
if value == "" {
|
|
return fmt.Errorf("value shouldn't be empty")
|
|
}
|
|
|
|
return nil
|
|
}
|