From 39c16c8a1e9292d26669ea4faeedc09ad4ece1ea Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Kurk=C3=B3=20Mih=C3=A1ly?= Date: Thu, 8 Mar 2018 14:59:00 +0200 Subject: [PATCH] cmd, ethdb, vendor: integrate leveldb iostats (#16277) * cmd, dashboard, ethdb, vendor: send iostats to dashboard * ethdb: change names * ethdb: handle parsing errors * ethdb: handle iostats syntax error * ethdb: r -> w --- cmd/geth/chaincmd.go | 13 +++ dashboard/dashboard.go | 8 +- ethdb/database.go | 102 ++++++++++-------- .../github.com/syndtr/goleveldb/leveldb/db.go | 6 ++ .../syndtr/goleveldb/leveldb/iterator/iter.go | 2 +- .../syndtr/goleveldb/leveldb/memdb/memdb.go | 2 +- .../syndtr/goleveldb/leveldb/session.go | 4 +- .../syndtr/goleveldb/leveldb/storage.go | 63 +++++++++++ .../leveldb/storage/file_storage_plan9.go | 4 +- .../syndtr/goleveldb/leveldb/util/util.go | 2 +- vendor/vendor.json | 58 +++++----- 11 files changed, 180 insertions(+), 84 deletions(-) create mode 100644 vendor/github.com/syndtr/goleveldb/leveldb/storage.go diff --git a/cmd/geth/chaincmd.go b/cmd/geth/chaincmd.go index 85d0c3acaa..c9ab72b6df 100644 --- a/cmd/geth/chaincmd.go +++ b/cmd/geth/chaincmd.go @@ -225,6 +225,13 @@ func importChain(ctx *cli.Context) error { utils.Fatalf("Failed to read database stats: %v", err) } fmt.Println(stats) + + ioStats, err := db.LDB().GetProperty("leveldb.iostats") + if err != nil { + utils.Fatalf("Failed to read database iostats: %v", err) + } + fmt.Println(ioStats) + fmt.Printf("Trie cache misses: %d\n", trie.CacheMisses()) fmt.Printf("Trie cache unloads: %d\n\n", trie.CacheUnloads()) @@ -255,6 +262,12 @@ func importChain(ctx *cli.Context) error { } fmt.Println(stats) + ioStats, err = db.LDB().GetProperty("leveldb.iostats") + if err != nil { + utils.Fatalf("Failed to read database iostats: %v", err) + } + fmt.Println(ioStats) + return nil } diff --git a/dashboard/dashboard.go b/dashboard/dashboard.go index 7d65514135..399fa34c08 100644 --- a/dashboard/dashboard.go +++ b/dashboard/dashboard.go @@ -270,8 +270,8 @@ func (db *Dashboard) collectData() { prevNetworkEgress = metrics.DefaultRegistry.Get("p2p/OutboundTraffic").(metrics.Meter).Count() prevProcessCPUTime = getProcessCPUTime() prevSystemCPUUsage = systemCPUUsage - prevDiskRead = metrics.DefaultRegistry.Get("eth/db/chaindata/compact/input").(metrics.Meter).Count() - prevDiskWrite = metrics.DefaultRegistry.Get("eth/db/chaindata/compact/output").(metrics.Meter).Count() + prevDiskRead = metrics.DefaultRegistry.Get("eth/db/chaindata/disk/read").(metrics.Meter).Count() + prevDiskWrite = metrics.DefaultRegistry.Get("eth/db/chaindata/disk/write").(metrics.Meter).Count() frequency = float64(db.config.Refresh / time.Second) numCPU = float64(runtime.NumCPU()) @@ -289,8 +289,8 @@ func (db *Dashboard) collectData() { curNetworkEgress = metrics.DefaultRegistry.Get("p2p/OutboundTraffic").(metrics.Meter).Count() curProcessCPUTime = getProcessCPUTime() curSystemCPUUsage = systemCPUUsage - curDiskRead = metrics.DefaultRegistry.Get("eth/db/chaindata/compact/input").(metrics.Meter).Count() - curDiskWrite = metrics.DefaultRegistry.Get("eth/db/chaindata/compact/output").(metrics.Meter).Count() + curDiskRead = metrics.DefaultRegistry.Get("eth/db/chaindata/disk/read").(metrics.Meter).Count() + curDiskWrite = metrics.DefaultRegistry.Get("eth/db/chaindata/disk/write").(metrics.Meter).Count() deltaNetworkIngress = float64(curNetworkIngress - prevNetworkIngress) deltaNetworkEgress = float64(curNetworkEgress - prevNetworkEgress) diff --git a/ethdb/database.go b/ethdb/database.go index 57d38f7f5f..8c557e4820 100644 --- a/ethdb/database.go +++ b/ethdb/database.go @@ -37,15 +37,11 @@ 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 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 + diskReadMeter metrics.Meter // Meter for measuring the effective amount of data read + diskWriteMeter metrics.Meter // Meter for measuring the effective amount of data written quitLock sync.Mutex // Mutex protecting the quit channel access quitChan chan chan error // Quit channel to stop the metrics collection before closing the database @@ -94,16 +90,9 @@ func (db *LDBDatabase) Path() string { // Put puts the given key / value to the queue func (db *LDBDatabase) Put(key []byte, value []byte) error { - // Measure the database put latency, if requested - if db.putTimer != nil { - defer db.putTimer.UpdateSince(time.Now()) - } // Generate the data to write to disk, update the meter and write //value = rle.Compress(value) - if db.writeMeter != nil { - db.writeMeter.Mark(int64(len(value))) - } return db.db.Put(key, value, nil) } @@ -113,32 +102,17 @@ func (db *LDBDatabase) Has(key []byte) (bool, error) { // Get returns the given key if it's present. func (db *LDBDatabase) Get(key []byte) ([]byte, error) { - // Measure the database get latency, if requested - if db.getTimer != nil { - defer db.getTimer.UpdateSince(time.Now()) - } // Retrieve the key and increment the miss counter if not found dat, err := db.db.Get(key, nil) if err != nil { - if db.missMeter != nil { - db.missMeter.Mark(1) - } return nil, err } - // Otherwise update the actually retrieved amount of data - if db.readMeter != nil { - db.readMeter.Mark(int64(len(dat))) - } return dat, nil //return rle.Decompress(dat) } // Delete deletes the key from the queue and database func (db *LDBDatabase) Delete(key []byte) error { - // Measure the database delete latency, if requested - if db.delTimer != nil { - defer db.delTimer.UpdateSince(time.Now()) - } // Execute the actual operation return db.db.Delete(key, nil) } @@ -178,15 +152,11 @@ func (db *LDBDatabase) Meter(prefix string) { return } // Initialize all the metrics collector at the requested prefix - db.getTimer = metrics.NewRegisteredTimer(prefix+"user/gets", nil) - db.putTimer = metrics.NewRegisteredTimer(prefix+"user/puts", nil) - db.delTimer = metrics.NewRegisteredTimer(prefix+"user/dels", nil) - db.missMeter = metrics.NewRegisteredMeter(prefix+"user/misses", nil) - db.readMeter = metrics.NewRegisteredMeter(prefix+"user/reads", nil) - db.writeMeter = metrics.NewRegisteredMeter(prefix+"user/writes", nil) db.compTimeMeter = metrics.NewRegisteredMeter(prefix+"compact/time", nil) db.compReadMeter = metrics.NewRegisteredMeter(prefix+"compact/input", nil) db.compWriteMeter = metrics.NewRegisteredMeter(prefix+"compact/output", nil) + db.diskReadMeter = metrics.NewRegisteredMeter(prefix+"disk/read", nil) + db.diskWriteMeter = metrics.NewRegisteredMeter(prefix+"disk/write", nil) // Create a quit channel for the periodic collector and run it db.quitLock.Lock() @@ -207,12 +177,17 @@ func (db *LDBDatabase) Meter(prefix string) { // 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 +// +// This is how the iostats look like (currently): +// Read(MB):3895.04860 Write(MB):3654.64712 func (db *LDBDatabase) meter(refresh time.Duration) { - // Create the counters to store current and previous values - counters := make([][]float64, 2) + // Create the counters to store current and previous compaction values + compactions := make([][]float64, 2) for i := 0; i < 2; i++ { - counters[i] = make([]float64, 3) + compactions[i] = make([]float64, 3) } + // Create storage for iostats. + var iostats [2]float64 // Iterate ad infinitum and collect the stats for i := 1; ; i++ { // Retrieve the database stats @@ -233,8 +208,8 @@ func (db *LDBDatabase) meter(refresh time.Duration) { 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 j := 0; j < len(compactions[i%2]); j++ { + compactions[i%2][j] = 0 } for _, line := range lines { parts := strings.Split(line, "|") @@ -247,19 +222,60 @@ func (db *LDBDatabase) meter(refresh time.Duration) { db.log.Error("Compaction entry parsing failed", "err", err) return } - counters[i%2][idx] += value + compactions[i%2][idx] += value } } // Update all the requested meters if db.compTimeMeter != nil { - db.compTimeMeter.Mark(int64((counters[i%2][0] - counters[(i-1)%2][0]) * 1000 * 1000 * 1000)) + db.compTimeMeter.Mark(int64((compactions[i%2][0] - compactions[(i-1)%2][0]) * 1000 * 1000 * 1000)) } if db.compReadMeter != nil { - db.compReadMeter.Mark(int64((counters[i%2][1] - counters[(i-1)%2][1]) * 1024 * 1024)) + db.compReadMeter.Mark(int64((compactions[i%2][1] - compactions[(i-1)%2][1]) * 1024 * 1024)) } if db.compWriteMeter != nil { - db.compWriteMeter.Mark(int64((counters[i%2][2] - counters[(i-1)%2][2]) * 1024 * 1024)) + db.compWriteMeter.Mark(int64((compactions[i%2][2] - compactions[(i-1)%2][2]) * 1024 * 1024)) } + + // Retrieve the database iostats. + ioStats, err := db.db.GetProperty("leveldb.iostats") + if err != nil { + db.log.Error("Failed to read database iostats", "err", err) + return + } + parts := strings.Split(ioStats, " ") + if len(parts) < 2 { + db.log.Error("Bad syntax of ioStats", "ioStats", ioStats) + return + } + r := strings.Split(parts[0], ":") + if len(r) < 2 { + db.log.Error("Bad syntax of read entry", "entry", parts[0]) + return + } + read, err := strconv.ParseFloat(r[1], 64) + if err != nil { + db.log.Error("Read entry parsing failed", "err", err) + return + } + w := strings.Split(parts[1], ":") + if len(w) < 2 { + db.log.Error("Bad syntax of write entry", "entry", parts[1]) + return + } + write, err := strconv.ParseFloat(w[1], 64) + if err != nil { + db.log.Error("Write entry parsing failed", "err", err) + return + } + if db.diskReadMeter != nil { + db.diskReadMeter.Mark(int64((read - iostats[0]) * 1024 * 1024)) + } + if db.diskWriteMeter != nil { + db.diskWriteMeter.Mark(int64((write - iostats[1]) * 1024 * 1024)) + } + iostats[0] = read + iostats[1] = write + // Sleep a bit, then repeat the stats collection select { case errc := <-db.quitChan: diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/db.go b/vendor/github.com/syndtr/goleveldb/leveldb/db.go index ea5595eb3a..3655418ad3 100644 --- a/vendor/github.com/syndtr/goleveldb/leveldb/db.go +++ b/vendor/github.com/syndtr/goleveldb/leveldb/db.go @@ -906,6 +906,8 @@ func (db *DB) GetSnapshot() (*Snapshot, error) { // Returns the number of files at level 'n'. // leveldb.stats // Returns statistics of the underlying DB. +// leveldb.iostats +// Returns statistics of effective disk read and write. // leveldb.writedelay // Returns cumulative write delay caused by compaction. // leveldb.sstables @@ -959,6 +961,10 @@ func (db *DB) GetProperty(name string) (value string, err error) { level, len(tables), float64(tables.size())/1048576.0, duration.Seconds(), float64(read)/1048576.0, float64(write)/1048576.0) } + case p == "iostats": + value = fmt.Sprintf("Read(MB):%.5f Write(MB):%.5f", + float64(db.s.stor.reads())/1048576.0, + float64(db.s.stor.writes())/1048576.0) case p == "writedelay": writeDelayN, writeDelay := atomic.LoadInt32(&db.cWriteDelayN), time.Duration(atomic.LoadInt64(&db.cWriteDelay)) value = fmt.Sprintf("DelayN:%d Delay:%s", writeDelayN, writeDelay) diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/iterator/iter.go b/vendor/github.com/syndtr/goleveldb/leveldb/iterator/iter.go index 3b55532746..b16e3a7045 100644 --- a/vendor/github.com/syndtr/goleveldb/leveldb/iterator/iter.go +++ b/vendor/github.com/syndtr/goleveldb/leveldb/iterator/iter.go @@ -88,7 +88,7 @@ type Iterator interface { // its contents may change on the next call to any 'seeks method'. Key() []byte - // Value returns the key of the current key/value pair, or nil if done. + // Value returns the value of the current key/value pair, or nil if done. // The caller should not modify the contents of the returned slice, and // its contents may change on the next call to any 'seeks method'. Value() []byte diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/memdb/memdb.go b/vendor/github.com/syndtr/goleveldb/leveldb/memdb/memdb.go index 18a19ed424..b661c08a93 100644 --- a/vendor/github.com/syndtr/goleveldb/leveldb/memdb/memdb.go +++ b/vendor/github.com/syndtr/goleveldb/leveldb/memdb/memdb.go @@ -329,7 +329,7 @@ func (p *DB) Delete(key []byte) error { h := p.nodeData[node+nHeight] for i, n := range p.prevNode[:h] { - m := n + 4 + i + m := n + nNext + i p.nodeData[m] = p.nodeData[p.nodeData[m]+nNext+i] } diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/session.go b/vendor/github.com/syndtr/goleveldb/leveldb/session.go index ad68a87039..3f391f9346 100644 --- a/vendor/github.com/syndtr/goleveldb/leveldb/session.go +++ b/vendor/github.com/syndtr/goleveldb/leveldb/session.go @@ -42,7 +42,7 @@ type session struct { stTempFileNum int64 stSeqNum uint64 // last mem compacted seq; need external synchronization - stor storage.Storage + stor *iStorage storLock storage.Locker o *cachedOptions icmp *iComparer @@ -68,7 +68,7 @@ func newSession(stor storage.Storage, o *opt.Options) (s *session, err error) { return } s = &session{ - stor: stor, + stor: newIStorage(stor), storLock: storLock, fileRef: make(map[int64]int), } diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/storage.go b/vendor/github.com/syndtr/goleveldb/leveldb/storage.go new file mode 100644 index 0000000000..d45fb5dfeb --- /dev/null +++ b/vendor/github.com/syndtr/goleveldb/leveldb/storage.go @@ -0,0 +1,63 @@ +package leveldb + +import ( + "github.com/syndtr/goleveldb/leveldb/storage" + "sync/atomic" +) + +type iStorage struct { + storage.Storage + read uint64 + write uint64 +} + +func (c *iStorage) Open(fd storage.FileDesc) (storage.Reader, error) { + r, err := c.Storage.Open(fd) + return &iStorageReader{r, c}, err +} + +func (c *iStorage) Create(fd storage.FileDesc) (storage.Writer, error) { + w, err := c.Storage.Create(fd) + return &iStorageWriter{w, c}, err +} + +func (c *iStorage) reads() uint64 { + return atomic.LoadUint64(&c.read) +} + +func (c *iStorage) writes() uint64 { + return atomic.LoadUint64(&c.write) +} + +// newIStorage returns the given storage wrapped by iStorage. +func newIStorage(s storage.Storage) *iStorage { + return &iStorage{s, 0, 0} +} + +type iStorageReader struct { + storage.Reader + c *iStorage +} + +func (r *iStorageReader) Read(p []byte) (n int, err error) { + n, err = r.Reader.Read(p) + atomic.AddUint64(&r.c.read, uint64(n)) + return n, err +} + +func (r *iStorageReader) ReadAt(p []byte, off int64) (n int, err error) { + n, err = r.Reader.ReadAt(p, off) + atomic.AddUint64(&r.c.read, uint64(n)) + return n, err +} + +type iStorageWriter struct { + storage.Writer + c *iStorage +} + +func (w *iStorageWriter) Write(p []byte) (n int, err error) { + n, err = w.Writer.Write(p) + atomic.AddUint64(&w.c.write, uint64(n)) + return n, err +} diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_plan9.go b/vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_plan9.go index bab62bfcee..b829798012 100644 --- a/vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_plan9.go +++ b/vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_plan9.go @@ -8,7 +8,6 @@ package storage import ( "os" - "path/filepath" ) type plan9FileLock struct { @@ -48,8 +47,7 @@ func rename(oldpath, newpath string) error { } } - _, fname := filepath.Split(newpath) - return os.Rename(oldpath, fname) + return os.Rename(oldpath, newpath) } func syncDir(name string) error { diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/util/util.go b/vendor/github.com/syndtr/goleveldb/leveldb/util/util.go index f35976865b..80614afc58 100644 --- a/vendor/github.com/syndtr/goleveldb/leveldb/util/util.go +++ b/vendor/github.com/syndtr/goleveldb/leveldb/util/util.go @@ -19,7 +19,7 @@ var ( // Releaser is the interface that wraps the basic Release method. type Releaser interface { // Release releases associated resources. Release should always success - // and can be called multipe times without causing error. + // and can be called multiple times without causing error. Release() } diff --git a/vendor/vendor.json b/vendor/vendor.json index d09fa5323c..bf55bc437f 100644 --- a/vendor/vendor.json +++ b/vendor/vendor.json @@ -406,76 +406,76 @@ "revisionTime": "2017-07-05T02:17:15Z" }, { - "checksumSHA1": "rpu5ZHjXlV13UKA7L1d5MTOyQwA=", + "checksumSHA1": "3QsnhPTXGytTbW3uDvQLgSo9s9M=", "path": "github.com/syndtr/goleveldb/leveldb", - "revision": "211f780988068502fe874c44dae530528ebd840f", - "revisionTime": "2018-01-28T14:04:16Z" + "revision": "169b1b37be738edb2813dab48c97a549bcf99bb5", + "revisionTime": "2018-03-07T11:33:52Z" }, { "checksumSHA1": "EKIow7XkgNdWvR/982ffIZxKG8Y=", "path": "github.com/syndtr/goleveldb/leveldb/cache", - "revision": "b89cc31ef7977104127d34c1bd31ebd1a9db2199", - "revisionTime": "2017-07-25T06:48:36Z" + "revision": "169b1b37be738edb2813dab48c97a549bcf99bb5", + "revisionTime": "2018-03-07T11:33:52Z" }, { "checksumSHA1": "5KPgnvCPlR0ysDAqo6jApzRQ3tw=", "path": "github.com/syndtr/goleveldb/leveldb/comparer", - "revision": "b89cc31ef7977104127d34c1bd31ebd1a9db2199", - "revisionTime": "2017-07-25T06:48:36Z" + "revision": "169b1b37be738edb2813dab48c97a549bcf99bb5", + "revisionTime": "2018-03-07T11:33:52Z" }, { "checksumSHA1": "1DRAxdlWzS4U0xKN/yQ/fdNN7f0=", "path": "github.com/syndtr/goleveldb/leveldb/errors", - "revision": "b89cc31ef7977104127d34c1bd31ebd1a9db2199", - "revisionTime": "2017-07-25T06:48:36Z" + "revision": "169b1b37be738edb2813dab48c97a549bcf99bb5", + "revisionTime": "2018-03-07T11:33:52Z" }, { "checksumSHA1": "eqKeD6DS7eNCtxVYZEHHRKkyZrw=", "path": "github.com/syndtr/goleveldb/leveldb/filter", - "revision": "b89cc31ef7977104127d34c1bd31ebd1a9db2199", - "revisionTime": "2017-07-25T06:48:36Z" + "revision": "169b1b37be738edb2813dab48c97a549bcf99bb5", + "revisionTime": "2018-03-07T11:33:52Z" }, { - "checksumSHA1": "8dXuAVIsbtaMiGGuHjzGR6Ny/5c=", + "checksumSHA1": "weSsccMav4BCerDpSLzh3mMxAYo=", "path": "github.com/syndtr/goleveldb/leveldb/iterator", - "revision": "b89cc31ef7977104127d34c1bd31ebd1a9db2199", - "revisionTime": "2017-07-25T06:48:36Z" + "revision": "169b1b37be738edb2813dab48c97a549bcf99bb5", + "revisionTime": "2018-03-07T11:33:52Z" }, { "checksumSHA1": "gJY7bRpELtO0PJpZXgPQ2BYFJ88=", "path": "github.com/syndtr/goleveldb/leveldb/journal", - "revision": "b89cc31ef7977104127d34c1bd31ebd1a9db2199", - "revisionTime": "2017-07-25T06:48:36Z" + "revision": "169b1b37be738edb2813dab48c97a549bcf99bb5", + "revisionTime": "2018-03-07T11:33:52Z" }, { - "checksumSHA1": "j+uaQ6DwJ50dkIdfMQu1TXdlQcY=", + "checksumSHA1": "MtYY1b2234y/MlS+djL8tXVAcQs=", "path": "github.com/syndtr/goleveldb/leveldb/memdb", - "revision": "b89cc31ef7977104127d34c1bd31ebd1a9db2199", - "revisionTime": "2017-07-25T06:48:36Z" + "revision": "169b1b37be738edb2813dab48c97a549bcf99bb5", + "revisionTime": "2018-03-07T11:33:52Z" }, { "checksumSHA1": "UmQeotV+m8/FduKEfLOhjdp18rs=", "path": "github.com/syndtr/goleveldb/leveldb/opt", - "revision": "b89cc31ef7977104127d34c1bd31ebd1a9db2199", - "revisionTime": "2017-07-25T06:48:36Z" + "revision": "169b1b37be738edb2813dab48c97a549bcf99bb5", + "revisionTime": "2018-03-07T11:33:52Z" }, { - "checksumSHA1": "tQ2AqXXAEy9icbZI9dLVdZGvWMw=", + "checksumSHA1": "QCSae2ub87f8awH+PKMpd8ZYOtg=", "path": "github.com/syndtr/goleveldb/leveldb/storage", - "revision": "b89cc31ef7977104127d34c1bd31ebd1a9db2199", - "revisionTime": "2017-07-25T06:48:36Z" + "revision": "169b1b37be738edb2813dab48c97a549bcf99bb5", + "revisionTime": "2018-03-07T11:33:52Z" }, { "checksumSHA1": "gWFPMz8OQeul0t54RM66yMTX49g=", "path": "github.com/syndtr/goleveldb/leveldb/table", - "revision": "b89cc31ef7977104127d34c1bd31ebd1a9db2199", - "revisionTime": "2017-07-25T06:48:36Z" + "revision": "169b1b37be738edb2813dab48c97a549bcf99bb5", + "revisionTime": "2018-03-07T11:33:52Z" }, { - "checksumSHA1": "4zil8Gwg8VPkDn1YzlgCvtukJFU=", + "checksumSHA1": "V/Dh7NV0/fy/5jX1KaAjmGcNbzI=", "path": "github.com/syndtr/goleveldb/leveldb/util", - "revision": "b89cc31ef7977104127d34c1bd31ebd1a9db2199", - "revisionTime": "2017-07-25T06:48:36Z" + "revision": "169b1b37be738edb2813dab48c97a549bcf99bb5", + "revisionTime": "2018-03-07T11:33:52Z" }, { "checksumSHA1": "TT1rac6kpQp2vz24m5yDGUNQ/QQ=",