Example #1
0
// NewClient creates a new Client for a given project and instance.
func NewClient(ctx context.Context, project, instance string, opts ...option.ClientOption) (*Client, error) {
	o, err := btopt.DefaultClientOptions(prodAddr, Scope, clientUserAgent)
	if err != nil {
		return nil, err
	}
	// Default to a small connection pool that can be overridden.
	o = append(o, option.WithGRPCConnectionPool(4))
	o = append(o, opts...)
	conn, err := transport.DialGRPC(ctx, o...)
	if err != nil {
		return nil, fmt.Errorf("dialing: %v", err)
	}
	return &Client{
		conn:     conn,
		client:   btpb.NewBigtableClient(conn),
		project:  project,
		instance: instance,
	}, nil
}
Example #2
0
// WithGRPCConnectionPool returns a ClientOption that creates a pool of gRPC
// connections that requests will be balanced between.
// This is an EXPERIMENTAL API and may be changed or removed in the future.
func WithGRPCConnectionPool(size int) ClientOption {
	return wrapOpt{option.WithGRPCConnectionPool(size)}
}
Example #3
0
func main() {
	var err error
	config, err = cbtrc.Load()
	if err != nil {
		log.Fatal(err)
	}
	config.RegisterFlags()

	flag.Parse()
	if err := config.CheckFlags(); err != nil {
		log.Fatal(err)
	}
	if config.Creds != "" {
		os.Setenv("GOOGLE_APPLICATION_CREDENTIALS", config.Creds)
	}
	if flag.NArg() != 0 {
		flag.Usage()
		os.Exit(1)
	}

	var options []option.ClientOption
	if *poolSize > 1 {
		options = append(options, option.WithGRPCConnectionPool(*poolSize))
	}

	var csvFile *os.File
	if *csvOutput != "" {
		csvFile, err = os.Create(*csvOutput)
		if err != nil {
			log.Fatalf("creating csv output file: %v", err)
		}
		defer csvFile.Close()
		log.Printf("Writing statistics to %q ...", *csvOutput)
	}

	log.Printf("Dialing connections...")
	client, err = bigtable.NewClient(context.Background(), config.Project, config.Instance, options...)
	if err != nil {
		log.Fatalf("Making bigtable.Client: %v", err)
	}
	defer client.Close()
	adminClient, err = bigtable.NewAdminClient(context.Background(), config.Project, config.Instance)
	if err != nil {
		log.Fatalf("Making bigtable.AdminClient: %v", err)
	}
	defer adminClient.Close()

	// Create a scratch table.
	log.Printf("Setting up scratch table...")
	if err := adminClient.CreateTable(context.Background(), *scratchTable); err != nil {
		log.Fatalf("Making scratch table %q: %v", *scratchTable, err)
	}
	if err := adminClient.CreateColumnFamily(context.Background(), *scratchTable, "f"); err != nil {
		log.Fatalf("Making scratch table column family: %v", err)
	}
	// Upon a successful run, delete the table. Don't bother checking for errors.
	defer adminClient.DeleteTable(context.Background(), *scratchTable)

	log.Printf("Starting load test... (run for %v)", *runFor)
	tbl := client.Open(*scratchTable)
	sem := make(chan int, *reqCount) // limit the number of requests happening at once
	var reads, writes stats
	stopTime := time.Now().Add(*runFor)
	var wg sync.WaitGroup
	for time.Now().Before(stopTime) {
		sem <- 1
		wg.Add(1)
		go func() {
			defer wg.Done()
			defer func() { <-sem }()

			ok := true
			opStart := time.Now()
			var stats *stats
			defer func() {
				stats.Record(ok, time.Since(opStart))
			}()

			row := fmt.Sprintf("row%d", rand.Intn(100)) // operate on 1 of 100 rows

			switch rand.Intn(10) {
			default:
				// read
				stats = &reads
				_, err := tbl.ReadRow(context.Background(), row, bigtable.RowFilter(bigtable.LatestNFilter(1)))
				if err != nil {
					log.Printf("Error doing read: %v", err)
					ok = false
				}
			case 0, 1, 2, 3, 4:
				// write
				stats = &writes
				mut := bigtable.NewMutation()
				mut.Set("f", "col", bigtable.Now(), bytes.Repeat([]byte("0"), 1<<10)) // 1 KB write
				if err := tbl.Apply(context.Background(), row, mut); err != nil {
					log.Printf("Error doing mutation: %v", err)
					ok = false
				}
			}
		}()
	}
	wg.Wait()

	readsAgg := stat.NewAggregate("reads", reads.ds, reads.tries-reads.ok)
	writesAgg := stat.NewAggregate("writes", writes.ds, writes.tries-writes.ok)
	log.Printf("Reads (%d ok / %d tries):\n%v", reads.ok, reads.tries, readsAgg)
	log.Printf("Writes (%d ok / %d tries):\n%v", writes.ok, writes.tries, writesAgg)

	if csvFile != nil {
		stat.WriteCSV([]*stat.Aggregate{readsAgg, writesAgg}, csvFile)
	}
}