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tracker.go
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tracker.go
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package main
import (
"fmt"
"log"
"runtime"
"sync"
"sync/atomic"
"time"
"github.com/influxdata/influxdb/cmd/influx_tsm/stats"
"github.com/influxdata/influxdb/cmd/influx_tsm/tsdb"
)
// tracker will orchestrate and track the conversions of non-TSM shards to TSM
type tracker struct {
Stats stats.Stats
shards tsdb.ShardInfos
opts options
pg ParallelGroup
wg sync.WaitGroup
}
// newTracker will setup and return a clean tracker instance
func newTracker(shards tsdb.ShardInfos, opts options) *tracker {
t := &tracker{
shards: shards,
opts: opts,
pg: NewParallelGroup(runtime.GOMAXPROCS(0)),
}
return t
}
func (t *tracker) Run() error {
conversionStart := time.Now()
// Backup each directory.
if !opts.SkipBackup {
databases := t.shards.Databases()
fmt.Printf("Backing up %d databases...\n", len(databases))
t.wg.Add(len(databases))
for i := range databases {
db := databases[i]
go t.pg.Do(func() {
defer t.wg.Done()
start := time.Now()
log.Printf("Backup of database '%v' started", db)
err := backupDatabase(db)
if err != nil {
log.Fatalf("Backup of database %v failed: %v\n", db, err)
}
log.Printf("Database %v backed up (%v)\n", db, time.Now().Sub(start))
})
}
t.wg.Wait()
} else {
fmt.Println("Database backup disabled.")
}
t.wg.Add(len(t.shards))
for i := range t.shards {
si := t.shards[i]
go t.pg.Do(func() {
defer func() {
atomic.AddUint64(&t.Stats.CompletedShards, 1)
t.wg.Done()
}()
start := time.Now()
log.Printf("Starting conversion of shard: %v", si.FullPath(opts.DataPath))
if err := convertShard(si, t); err != nil {
log.Fatalf("Failed to convert %v: %v\n", si.FullPath(opts.DataPath), err)
}
log.Printf("Conversion of %v successful (%v)\n", si.FullPath(opts.DataPath), time.Since(start))
})
}
done := make(chan struct{})
go func() {
t.wg.Wait()
close(done)
}()
WAIT_LOOP:
for {
select {
case <-done:
break WAIT_LOOP
case <-time.After(opts.UpdateInterval):
t.StatusUpdate()
}
}
t.Stats.TotalTime = time.Since(conversionStart)
return nil
}
func (t *tracker) StatusUpdate() {
shardCount := atomic.LoadUint64(&t.Stats.CompletedShards)
pointCount := atomic.LoadUint64(&t.Stats.PointsRead)
pointWritten := atomic.LoadUint64(&t.Stats.PointsWritten)
log.Printf("Still Working: Completed Shards: %d/%d Points read/written: %d/%d", shardCount, len(t.shards), pointCount, pointWritten)
}
func (t *tracker) PrintStats() {
preSize := t.shards.Size()
postSize := int64(t.Stats.TsmBytesWritten)
fmt.Printf("\nSummary statistics\n========================================\n")
fmt.Printf("Databases converted: %d\n", len(t.shards.Databases()))
fmt.Printf("Shards converted: %d\n", len(t.shards))
fmt.Printf("TSM files created: %d\n", t.Stats.TsmFilesCreated)
fmt.Printf("Points read: %d\n", t.Stats.PointsRead)
fmt.Printf("Points written: %d\n", t.Stats.PointsWritten)
fmt.Printf("NaN filtered: %d\n", t.Stats.NanFiltered)
fmt.Printf("Inf filtered: %d\n", t.Stats.InfFiltered)
fmt.Printf("Points without fields filtered: %d\n", t.Stats.FieldsFiltered)
fmt.Printf("Disk usage pre-conversion (bytes): %d\n", preSize)
fmt.Printf("Disk usage post-conversion (bytes): %d\n", postSize)
fmt.Printf("Reduction factor: %d%%\n", 100*(preSize-postSize)/preSize)
fmt.Printf("Bytes per TSM point: %.2f\n", float64(postSize)/float64(t.Stats.PointsWritten))
fmt.Printf("Total conversion time: %v\n", t.Stats.TotalTime)
fmt.Println()
}