func main() {
namenode := flag.String("namenode", "localhost:9000", "HDFS namenode address.")
webhdfs := flag.String("webhdfs", "localhost:50070", "WebHDFS address.")
user := flag.String("user", "", "HDFS username. Could be empty.")
flag.Parse()
fs.HookupHDFS(*namenode, *webhdfs, *user)
dir := path.Join(fmt.Sprintf("/hdfs/tmp/test/github.com/wangkuiyi/file/%v", time.Now().UnixNano()))
file := path.Join(dir, "hello.txt")
content := "Hello World!\n"
if e := fs.Mkdir(dir); e != nil {
log.Panicf("Mkdir(%v) failed", dir)
}
if w, e := fs.Create(file); e != nil {
log.Panicf("Create(%v) failed", file)
} else {
fmt.Fprintf(w, content)
w.Close()
}
if _, e := fs.Stat(file); os.IsNotExist(e) {
log.Panicf("Expecting file exists, but not")
}
if r, e := fs.Open(file); e == nil {
b, _ := ioutil.ReadAll(r)
fmt.Println(string(b))
r.Close()
}
}
func main() {
freq := flag.String("tf", "", "Token frequency list. Each line consists of frequence and token.")
shards := flag.Int("s", 10, "Hint of number of vshards. Might be less.")
delUnbalanced := flag.Bool("d", true, "Delete singular and unbalanced vshards.")
vocab := flag.String("vocab", "", "Gob encoded Vocab file")
vshdr := flag.String("vshdr", "", "Gob encoded VSharder file.")
flag.Parse()
f, e := fs.Open(*freq)
if e != nil {
log.Fatal(e)
}
defer f.Close()
v, e := fs.Create(*vocab)
if e != nil {
log.Fatal(e)
}
defer v.Close()
s, e := fs.Create(*vshdr)
if e != nil {
log.Fatal(e)
}
defer s.Close()
{
vocab, vshdr, e := algo.BuildVocabAndVSharder(f, *shards, *delUnbalanced)
if e != nil {
log.Fatal(e)
}
fmt.Printf("Generated %v shards\n", vshdr.Num())
if e := gob.NewEncoder(v).Encode(vocab); e != nil {
log.Fatal(e)
}
if e := gob.NewEncoder(s).Encode(vshdr); e != nil {
log.Fatal(e)
}
}
}