5737: Merge branch 'master' into 5737-ruby231

[arvados.git] / tools / keep-exercise / keep-exercise.go

diff --git a/tools/keep-exercise/keep-exercise.go b/tools/keep-exercise/keep-exercise.go
index a94c01e55b7ddeaf37d574b2d2d60152ece75854..6d791bf9876a5b84a2b1b642025b730771f76da2 100644 (file)
--- a/tools/keep-exercise/keep-exercise.go
+++ b/tools/keep-exercise/keep-exercise.go
@@ -36,6 +36,8 @@ var (
        VaryThread    = flag.Bool("vary-thread", false, "use -wthreads different data blocks")
        Replicas      = flag.Int("replicas", 1, "replication level for writing")
        StatsInterval = flag.Duration("stats-interval", time.Second, "time interval between IO stats reports, or 0 to disable")
+       ServiceURL    = flag.String("url", "", "specify scheme://host of a single keep service to exercise (instead of using all advertised services like normal clients)")
+       ServiceUUID   = flag.String("uuid", "", "specify UUID of a single advertised keep service to exercise")
 )
 
 func main() {
@@ -45,18 +47,20 @@ func main() {
        if err != nil {
                log.Fatal(err)
        }
-       kc, err := keepclient.MakeKeepClient(&arv)
+       kc, err := keepclient.MakeKeepClient(arv)
        if err != nil {
                log.Fatal(err)
        }
        kc.Want_replicas = *Replicas
        kc.Client.Timeout = 10 * time.Minute
 
-       nextBuf := make(chan []byte, *WriteThreads)
+       overrideServices(kc)
+
        nextLocator := make(chan string, *ReadThreads+*WriteThreads)
 
        go countBeans(nextLocator)
        for i := 0; i < *WriteThreads; i++ {
+               nextBuf := make(chan []byte, 1)
                go makeBufs(nextBuf, i)
                go doWrites(kc, nextBuf, nextLocator)
        }
@@ -102,22 +106,28 @@ func countBeans(nextLocator chan string) {
        }
 }
 
-func makeBufs(nextBuf chan []byte, threadID int) {
+func makeBufs(nextBuf chan<- []byte, threadID int) {
        buf := make([]byte, *BlockSize)
        if *VaryThread {
                binary.PutVarint(buf, int64(threadID))
        }
+       randSize := 524288
+       if randSize > *BlockSize {
+               randSize = *BlockSize
+       }
        for {
                if *VaryRequest {
-                       if _, err := io.ReadFull(rand.Reader, buf); err != nil {
+                       rnd := make([]byte, randSize)
+                       if _, err := io.ReadFull(rand.Reader, rnd); err != nil {
                                log.Fatal(err)
                        }
+                       buf = append(rnd, buf[randSize:]...)
                }
                nextBuf <- buf
        }
 }
 
-func doWrites(kc *keepclient.KeepClient, nextBuf chan []byte, nextLocator chan string) {
+func doWrites(kc *keepclient.KeepClient, nextBuf <-chan []byte, nextLocator chan<- string) {
        for buf := range nextBuf {
                locator, _, err := kc.PutB(buf)
                if err != nil {
@@ -134,7 +144,7 @@ func doWrites(kc *keepclient.KeepClient, nextBuf chan []byte, nextLocator chan s
        }
 }
 
-func doReads(kc *keepclient.KeepClient, nextLocator chan string) {
+func doReads(kc *keepclient.KeepClient, nextLocator <-chan string) {
        for locator := range nextLocator {
                rdr, size, url, err := kc.Get(locator)
                if err != nil {
@@ -155,3 +165,23 @@ func doReads(kc *keepclient.KeepClient, nextLocator chan string) {
                bytesInChan <- uint64(n)
        }
 }
+
+func overrideServices(kc *keepclient.KeepClient) {
+       roots := make(map[string]string)
+       if *ServiceURL != "" {
+               roots["zzzzz-bi6l4-000000000000000"] = *ServiceURL
+       } else if *ServiceUUID != "" {
+               for uuid, url := range kc.GatewayRoots() {
+                       if uuid == *ServiceUUID {
+                               roots[uuid] = url
+                               break
+                       }
+               }
+               if len(roots) == 0 {
+                       log.Fatalf("Service %q was not in list advertised by API %+q", *ServiceUUID, kc.GatewayRoots())
+               }
+       } else {
+               return
+       }
+       kc.SetServiceRoots(roots, roots, roots)
+}