1 files changed, 122 insertions, 0 deletions
diff --git a/cmd/swarm/swarm-smoke/sliding_window.go b/cmd/swarm/swarm-smoke/sliding_window.go
new file mode 100644
index 000000000..3dd404c50
--- /dev/null
+++ b/cmd/swarm/swarm-smoke/sliding_window.go
@@ -0,0 +1,122 @@
+// Copyright 2018 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// go-ethereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// go-ethereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+
+package main
+
+import (
+	"crypto/md5"
+	crand "crypto/rand"
+	"fmt"
+	"io"
+	"math/rand"
+	"time"
+
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/metrics"
+	"github.com/pborman/uuid"
+
+	cli "gopkg.in/urfave/cli.v1"
+)
+
+var seed = time.Now().UTC().UnixNano()
+
+func init() {
+	rand.Seed(seed)
+}
+
+type uploadResult struct {
+	hash   string
+	digest []byte
+}
+
+func slidingWindow(c *cli.Context) error {
+	defer func(now time.Time) {
+		totalTime := time.Since(now)
+
+		log.Info("total time", "time", totalTime)
+		metrics.GetOrRegisterCounter("sliding-window.total-time", nil).Inc(int64(totalTime))
+	}(time.Now())
+
+	generateEndpoints(scheme, cluster, appName, from, to)
+	hashes := []uploadResult{} //swarm hashes of the uploads
+	nodes := to - from
+	const iterationTimeout = 30 * time.Second
+	log.Info("sliding window test started", "nodes", nodes, "filesize(kb)", filesize, "timeout", timeout)
+	uploadedBytes := 0
+	networkDepth := 0
+	errored := false
+
+outer:
+	for {
+		log.Info("uploading to "+endpoints[0]+" and syncing", "seed", seed)
+
+		h := md5.New()
+		r := io.TeeReader(io.LimitReader(crand.Reader, int64(filesize*1000)), h)
+		t1 := time.Now()
+
+		hash, err := upload(r, filesize*1000, endpoints[0])
+		if err != nil {
+			log.Error(err.Error())
+			return err
+		}
+
+		metrics.GetOrRegisterResettingTimer("sliding-window.upload-time", nil).UpdateSince(t1)
+
+		fhash := h.Sum(nil)
+
+		log.Info("uploaded successfully", "hash", hash, "digest", fmt.Sprintf("%x", fhash), "sleeping", syncDelay)
+		hashes = append(hashes, uploadResult{hash: hash, digest: fhash})
+		time.Sleep(time.Duration(syncDelay) * time.Second)
+		uploadedBytes += filesize * 1000
+
+		for i, v := range hashes {
+			timeout := time.After(time.Duration(timeout) * time.Second)
+			errored = false
+
+		inner:
+			for {
+				select {
+				case <-timeout:
+					errored = true
+					log.Error("error retrieving hash. timeout", "hash idx", i, "err", err)
+					metrics.GetOrRegisterCounter("sliding-window.single.error", nil).Inc(1)
+					break inner
+				default:
+					randIndex := 1 + rand.Intn(len(endpoints)-1)
+					ruid := uuid.New()[:8]
+					start := time.Now()
+					err := fetch(v.hash, endpoints[randIndex], v.digest, ruid)
+					if err != nil {
+						continue inner
+					}
+					metrics.GetOrRegisterResettingTimer("sliding-window.single.fetch-time", nil).UpdateSince(start)
+					break inner
+				}
+			}
+
+			if errored {
+				break outer
+			}
+			networkDepth = i
+			metrics.GetOrRegisterGauge("sliding-window.network-depth", nil).Update(int64(networkDepth))
+		}
+	}
+
+	log.Info("sliding window test finished", "errored?", errored, "networkDepth", networkDepth, "networkDepth(kb)", networkDepth*filesize)
+	log.Info("stats", "uploadedFiles", len(hashes), "uploadedKb", uploadedBytes/1000, "filesizeKb", filesize)
+
+	return nil
+}