|
|
|
|
@ -1,6 +1,8 @@ |
|
|
|
|
package ethdb |
|
|
|
|
|
|
|
|
|
import ( |
|
|
|
|
"strconv" |
|
|
|
|
"strings" |
|
|
|
|
"time" |
|
|
|
|
|
|
|
|
|
"github.com/ethereum/go-ethereum/compression/rle" |
|
|
|
|
@ -19,12 +21,15 @@ type LDBDatabase struct { |
|
|
|
|
fn string // filename for reporting
|
|
|
|
|
db *leveldb.DB // LevelDB instance
|
|
|
|
|
|
|
|
|
|
GetTimer metrics.Timer // Timer for measuring the database get request counts and latencies
|
|
|
|
|
PutTimer metrics.Timer // Timer for measuring the database put request counts and latencies
|
|
|
|
|
DelTimer metrics.Timer // Timer for measuring the database delete request counts and latencies
|
|
|
|
|
MissMeter metrics.Meter // MEter for measuring the missed database get requests
|
|
|
|
|
ReadMeter metrics.Meter // Meter for measuring the database get request data usage
|
|
|
|
|
WriteMeter metrics.Meter // Meter for measuring the database put request data usage
|
|
|
|
|
GetTimer metrics.Timer // Timer for measuring the database get request counts and latencies
|
|
|
|
|
PutTimer metrics.Timer // Timer for measuring the database put request counts and latencies
|
|
|
|
|
DelTimer metrics.Timer // Timer for measuring the database delete request counts and latencies
|
|
|
|
|
MissMeter metrics.Meter // Meter for measuring the missed database get requests
|
|
|
|
|
ReadMeter metrics.Meter // Meter for measuring the database get request data usage
|
|
|
|
|
WriteMeter metrics.Meter // Meter for measuring the database put request data usage
|
|
|
|
|
CompTimeMeter metrics.Meter // Meter for measuring the total time spent in database compaction
|
|
|
|
|
CompReadMeter metrics.Meter // Meter for measuring the data read during compaction
|
|
|
|
|
CompWriteMeter metrics.Meter // Meter for measuring the data written during compaction
|
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
// NewLDBDatabase returns a LevelDB wrapped object. LDBDatabase does not persist data by
|
|
|
|
|
@ -45,6 +50,7 @@ func NewLDBDatabase(file string) (*LDBDatabase, error) { |
|
|
|
|
fn: file, |
|
|
|
|
db: db, |
|
|
|
|
} |
|
|
|
|
go database.meter(3 * time.Second) |
|
|
|
|
|
|
|
|
|
return database, nil |
|
|
|
|
} |
|
|
|
|
@ -53,8 +59,7 @@ func NewLDBDatabase(file string) (*LDBDatabase, error) { |
|
|
|
|
func (self *LDBDatabase) Put(key []byte, value []byte) error { |
|
|
|
|
// Measure the database put latency, if requested
|
|
|
|
|
if self.PutTimer != nil { |
|
|
|
|
start := time.Now() |
|
|
|
|
defer self.PutTimer.UpdateSince(start) |
|
|
|
|
defer self.PutTimer.UpdateSince(time.Now()) |
|
|
|
|
} |
|
|
|
|
// Generate the data to write to disk, update the meter and write
|
|
|
|
|
dat := rle.Compress(value) |
|
|
|
|
@ -69,8 +74,7 @@ func (self *LDBDatabase) Put(key []byte, value []byte) error { |
|
|
|
|
func (self *LDBDatabase) Get(key []byte) ([]byte, error) { |
|
|
|
|
// Measure the database get latency, if requested
|
|
|
|
|
if self.GetTimer != nil { |
|
|
|
|
start := time.Now() |
|
|
|
|
defer self.GetTimer.UpdateSince(start) |
|
|
|
|
defer self.GetTimer.UpdateSince(time.Now()) |
|
|
|
|
} |
|
|
|
|
// Retrieve the key and increment the miss counter if not found
|
|
|
|
|
dat, err := self.db.Get(key, nil) |
|
|
|
|
@ -91,8 +95,7 @@ func (self *LDBDatabase) Get(key []byte) ([]byte, error) { |
|
|
|
|
func (self *LDBDatabase) Delete(key []byte) error { |
|
|
|
|
// Measure the database delete latency, if requested
|
|
|
|
|
if self.DelTimer != nil { |
|
|
|
|
start := time.Now() |
|
|
|
|
defer self.DelTimer.UpdateSince(start) |
|
|
|
|
defer self.DelTimer.UpdateSince(time.Now()) |
|
|
|
|
} |
|
|
|
|
// Execute the actual operation
|
|
|
|
|
return self.db.Delete(key, nil) |
|
|
|
|
@ -111,7 +114,6 @@ func (self *LDBDatabase) Close() { |
|
|
|
|
if err := self.Flush(); err != nil { |
|
|
|
|
glog.V(logger.Error).Infof("error: flush '%s': %v\n", self.fn, err) |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
self.db.Close() |
|
|
|
|
glog.V(logger.Error).Infoln("flushed and closed db:", self.fn) |
|
|
|
|
} |
|
|
|
|
@ -119,3 +121,72 @@ func (self *LDBDatabase) Close() { |
|
|
|
|
func (self *LDBDatabase) LDB() *leveldb.DB { |
|
|
|
|
return self.db |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
// meter periodically retrieves internal leveldb counters and reports them to
|
|
|
|
|
// the metrics subsystem.
|
|
|
|
|
//
|
|
|
|
|
// This is how a stats table look like (currently):
|
|
|
|
|
// Compactions
|
|
|
|
|
// Level | Tables | Size(MB) | Time(sec) | Read(MB) | Write(MB)
|
|
|
|
|
// -------+------------+---------------+---------------+---------------+---------------
|
|
|
|
|
// 0 | 0 | 0.00000 | 1.27969 | 0.00000 | 12.31098
|
|
|
|
|
// 1 | 85 | 109.27913 | 28.09293 | 213.92493 | 214.26294
|
|
|
|
|
// 2 | 523 | 1000.37159 | 7.26059 | 66.86342 | 66.77884
|
|
|
|
|
// 3 | 570 | 1113.18458 | 0.00000 | 0.00000 | 0.00000
|
|
|
|
|
func (self *LDBDatabase) meter(refresh time.Duration) { |
|
|
|
|
// Create the counters to store current and previous values
|
|
|
|
|
counters := make([][]float64, 2) |
|
|
|
|
for i := 0; i < 2; i++ { |
|
|
|
|
counters[i] = make([]float64, 3) |
|
|
|
|
} |
|
|
|
|
// Iterate ad infinitum and collect the stats
|
|
|
|
|
for i := 1; ; i++ { |
|
|
|
|
// Retrieve the database stats
|
|
|
|
|
stats, err := self.db.GetProperty("leveldb.stats") |
|
|
|
|
if err != nil { |
|
|
|
|
glog.V(logger.Error).Infof("failed to read database stats: %v", err) |
|
|
|
|
return |
|
|
|
|
} |
|
|
|
|
// Find the compaction table, skip the header
|
|
|
|
|
lines := strings.Split(stats, "\n") |
|
|
|
|
for len(lines) > 0 && strings.TrimSpace(lines[0]) != "Compactions" { |
|
|
|
|
lines = lines[1:] |
|
|
|
|
} |
|
|
|
|
if len(lines) <= 3 { |
|
|
|
|
glog.V(logger.Error).Infof("compaction table not found") |
|
|
|
|
return |
|
|
|
|
} |
|
|
|
|
lines = lines[3:] |
|
|
|
|
|
|
|
|
|
// Iterate over all the table rows, and accumulate the entries
|
|
|
|
|
for j := 0; j < len(counters[i%2]); j++ { |
|
|
|
|
counters[i%2][j] = 0 |
|
|
|
|
} |
|
|
|
|
for _, line := range lines { |
|
|
|
|
parts := strings.Split(line, "|") |
|
|
|
|
if len(parts) != 6 { |
|
|
|
|
break |
|
|
|
|
} |
|
|
|
|
for idx, counter := range parts[3:] { |
|
|
|
|
if value, err := strconv.ParseFloat(strings.TrimSpace(counter), 64); err != nil { |
|
|
|
|
glog.V(logger.Error).Infof("compaction entry parsing failed: %v", err) |
|
|
|
|
return |
|
|
|
|
} else { |
|
|
|
|
counters[i%2][idx] += value |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
// Update all the requested meters
|
|
|
|
|
if self.CompTimeMeter != nil { |
|
|
|
|
self.CompTimeMeter.Mark(int64((counters[i%2][0] - counters[(i-1)%2][0]) * 1000 * 1000 * 1000)) |
|
|
|
|
} |
|
|
|
|
if self.CompReadMeter != nil { |
|
|
|
|
self.CompReadMeter.Mark(int64((counters[i%2][1] - counters[(i-1)%2][1]) * 1024 * 1024)) |
|
|
|
|
} |
|
|
|
|
if self.CompWriteMeter != nil { |
|
|
|
|
self.CompWriteMeter.Mark(int64((counters[i%2][2] - counters[(i-1)%2][2]) * 1024 * 1024)) |
|
|
|
|
} |
|
|
|
|
// Sleep a bit, then repeat the stats collection
|
|
|
|
|
time.Sleep(refresh) |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
Jeffrey Wilcke
10 years ago