diff --git a/src/pkg/gearman/Makefile b/src/pkg/gearman/Makefile
index 988fe7b..19ac949 100644
--- a/src/pkg/gearman/Makefile
+++ b/src/pkg/gearman/Makefile
@@ -7,8 +7,8 @@ include $(GOROOT)/src/Make.inc
 TARG=gearman
 GOFILES=\
 	gearman.go\
-	job.go\
-	jobclient.go\
+	worker/job.go\
+	worker/jobclient.go\
 	worker.go\
 #	client.go\
 
diff --git a/src/pkg/gearman/gearman.go b/src/pkg/gearman/gearman.go
index 18a7cfe..dc8f3ca 100644
--- a/src/pkg/gearman/gearman.go
+++ b/src/pkg/gearman/gearman.go
@@ -4,6 +4,34 @@ const (
     TCP = "tcp4"
     WORKER_SERVER_CAP = 32
     WORKER_FUNCTION_CAP = 512
+
+
+     // \x00REQ
+    REQ = 5391697
+    // \x00RES
+    RES = 5391699
+
+    CAN_DO = 1
+    CANT_DO = 2
+    RESET_ABILITIES = 3
+    PRE_SLEEP = 4
+    NOOP = 6
+    GRAB_JOB = 9
+    NO_JOB = 10
+    JOB_ASSIGN = 11
+    WORK_STATUS = 12
+    WORK_COMPLETE = 13
+    WORK_FAIL = 14
+    ECHO_REQ = 16
+    ECHO_RES = 17
+    ERROR = 19
+    SET_CLIENT_ID = 22
+    CAN_DO_TIMEOUT = 23
+    WORK_EXCEPTION = 25
+    WORK_DATA = 28
+    WORK_WARNING = 29
+    GRAB_JOB_UNIQ = 30
+    JOB_ASSIGN_UNIQ = 31
 )
 
 
diff --git a/src/pkg/gearman/gearman_test.go b/src/pkg/gearman/gearman_test.go
index a6bc3a7..84aae20 100644
--- a/src/pkg/gearman/gearman_test.go
+++ b/src/pkg/gearman/gearman_test.go
@@ -2,6 +2,7 @@ package gearman
 
 import (
     "testing"
+    "os"
 )
 
 var worker *Worker
@@ -16,21 +17,22 @@ func TestAddServer(t *testing.T) {
         t.Error(err)
     }
 
-    if l := len(worker.servers); l != 1 {
-        t.Log(worker.servers)
+    if l := len(worker.clients); l != 1 {
+        t.Log(worker.clients)
         t.Error("The length of server list should be 1.")
     }
 }
 
-func TestAddFunction(t *testing.T) {
-    f := func(job *Job) []byte {
-        return nil
-    }
+func foobar(job *Job) ([]byte, os.Error) {
+    return nil, nil
+}
 
-    if err := worker.AddFunction("foobar", f); err != nil {
+
+func TestAddFunction(t *testing.T) {
+    if err := worker.AddFunction("foobar", foobar, 0); err != nil {
         t.Error(err)
     }
-    if err := worker.AddFunction("timeout", f); err != nil {
+    if err := worker.AddFunction("timeout", foobar, 5); err != nil {
         t.Error(err)
     }
     if l := len(worker.functions); l != 2 {
@@ -40,19 +42,31 @@ func TestAddFunction(t *testing.T) {
 }
 
 func TestEcho(t * testing.T) {
-    go worker.Work()
     if err := worker.Echo([]byte("Hello World")); err != nil {
         t.Error(err)
     }
 }
-
+/*
 func TestResult(t *testing.T) {
     if job := worker.Result(); job == nil {
-        //t.Error("Nothing in result.")
+        t.Error("Nothing in result.")
     } else {
         t.Log(job)
     }
 }
+*/
+
+func TestRemoveFunction(t * testing.T) {
+    if err := worker.RemoveFunction("foobar"); err != nil {
+        t.Error(err)
+    }
+}
+
+func TestReset(t * testing.T) {
+    if err := worker.Reset(); err != nil {
+        t.Error(err)
+    }
+}
 
 func TestClose(t *testing.T) {
     if err := worker.Close(); err != nil {
diff --git a/src/pkg/gearman/job.go b/src/pkg/gearman/job.go
deleted file mode 100644
index f63bcf6..0000000
--- a/src/pkg/gearman/job.go
+++ /dev/null
@@ -1,79 +0,0 @@
-package gearman
-
-import (
-    "os"
-)
-
-const (
-    // \x00REQ
-    REQ = 5391697
-    // \x00RES
-    RES = 5391699
-    
-    CAN_DO = 1
-    CANT_DO = 2
-    ECHO_REQ = 16
-    ECHO_RES = 17
-    ERROR = 19
-    CAN_DO_TIMEOUT = 23
-)
-
-type Job struct {
-    client *JobClient
-    Data []byte
-    MagicCode, DataType uint32
-}
-
-func ByteToUint32(buf [4]byte) uint32 {
-    return uint32(buf[0]) << 24 +
-        uint32(buf[1]) << 16 +
-        uint32(buf[2]) << 8 +
-        uint32(buf[3])
-}
-
-func Uint32ToByte(i uint32) (data [4]byte) {
-    data[0] = byte((i >> 24) & 0xff)
-    data[1] = byte((i >> 16) & 0xff)
-    data[2] = byte((i >> 8) & 0xff)
-    data[3] = byte(i & 0xff)
-    return
-}
-
-func NewJob(server *JobClient, magiccode, datatype uint32, data []byte) (job *Job) {
-    return &Job{client: server,
-        MagicCode:magiccode,
-        DataType: datatype,
-        Data:data}
-}
-
-func DecodeJob(server *JobClient, data []byte) (job *Job, err os.Error) {
-    if len(data) < 12 {
-        return nil, os.NewError("Data length is too small.")
-    }
-    datatype := ByteToUint32([4]byte{data[4], data[5], data[6], data[7]})
-    l := ByteToUint32([4]byte{data[8], data[9], data[10], data[11]})
-    if len(data[12:]) != int(l) {
-         return nil, os.NewError("Invalid data length.")
-    }
-    switch(ByteToUint32([4]byte{data[4], data[5], data[6], data[7]})) {
-        case ECHO_RES:
-            data = data[12:]
-    }
-    return NewJob(server, REQ, datatype, data), err
-}
-
-func (job *Job) Encode() (data []byte) {
-    magiccode := Uint32ToByte(job.MagicCode)
-    datatype := Uint32ToByte(job.DataType)
-    l := len(job.Data)
-    datalength := Uint32ToByte(uint32(l))
-    data = make([]byte, 12 + l)
-    copy(data[:4], magiccode[:])
-    copy(data[4:8], datatype[:])
-    copy(data[8:12], datalength[:])
-    copy(data[12:], job.Data)
-    return
-}
-
-
-
diff --git a/src/pkg/gearman/jobclient.go b/src/pkg/gearman/jobclient.go
deleted file mode 100644
index fb10ed1..0000000
--- a/src/pkg/gearman/jobclient.go
+++ /dev/null
@@ -1,68 +0,0 @@
-package gearman
-
-import (
-    "net"
-    "os"
-//    "log"
-)
-
-type JobClient struct {
-    conn net.Conn
-    incoming chan *Job
-    running bool
-}
-
-func NewJobClient(addr string, incoming chan *Job) (jobclient *JobClient, err os.Error) {
-    conn, err := net.Dial(TCP, addr)
-    if err != nil {
-        return nil, err
-    }
-    jobclient = &JobClient{conn: conn, incoming: incoming, running:true}
-    return jobclient, err
-}
-
-func (server *JobClient) Work() (err os.Error) {
-    for server.running {
-        var rel []byte
-        for {
-            buf := make([]byte, 2048)
-            n, err := server.conn.Read(buf)
-            if err != nil {
-                if err == os.EOF && n == 0 {
-                    break
-                }
-                return err
-            }
-            rel = append(rel, buf[0: n] ...)
-            break
-        }
-        job, err := DecodeJob(server, rel)
-        if err != nil {
-            return err
-        } else {
-            server.incoming <- job
-        }
-    }
-    return
-}
-
-func (server *JobClient) WriteJob(job * Job) (err os.Error) {
-    return server.Write(job.Encode())
-}
-
-func (server *JobClient) Write(buf []byte) (err os.Error) {
-    var n int
-    for i := 0; i < len(buf); i += n {
-        n, err = server.conn.Write(buf[i:])
-        if err != nil {
-            return err
-        }
-    }
-    return
-}
-
-func (server *JobClient) Close() (err os.Error) {
-    server.running = false
-    err = server.conn.Close()
-    return
-}
diff --git a/src/pkg/gearman/worker.go b/src/pkg/gearman/worker.go
index 974cb91..541e515 100644
--- a/src/pkg/gearman/worker.go
+++ b/src/pkg/gearman/worker.go
@@ -6,24 +6,29 @@ import(
     "log"
 )
 
-type JobFunction func(job *Job) []byte
+type JobFunction func(job *Job) ([]byte, os.Error)
+type JobFunctionMap map[string]JobFunction
 
 type Worker struct {
-    servers []*JobClient
-    functions map[string]JobFunction
+    clients []*jobClient
+    functions JobFunctionMap
 
     running bool
     incoming chan *Job
     mutex sync.Mutex
-    queue chan *Job
+    Queue chan *Job
 }
 
 func NewWorker() (worker *Worker) {
-    worker = &Worker{servers:make([]*JobClient, 0, WORKER_SERVER_CAP),
-        functions: make(map[string]JobFunction),
+    worker = &Worker{
+        // job server list
+        clients:make([]*jobClient, 0, WORKER_SERVER_CAP),
+        // function list
+        functions: make(JobFunctionMap),
         incoming: make(chan *Job, 512),
-        queue: make(chan *Job, 512),
-        running: true,}
+        Queue: make(chan *Job, 512),
+        running: true,
+    }
     return worker
 }
 
@@ -33,43 +38,69 @@ func (worker * Worker) AddServer(addr string) (err os.Error) {
     worker.mutex.Lock()
     defer worker.mutex.Unlock()
 
-    if len(worker.servers) == cap(worker.servers) {
-        return os.NewError("There were too many servers.")
+    if len(worker.clients) == cap(worker.clients) {
+        return os.NewError("There were too many clients.")
     }
 
     // Create a new job server's client as a agent of server
-    server, err := NewJobClient(addr, worker.incoming)
+    server, err := newJobClient(addr, worker.incoming)
     if err != nil {
         return err
     }
 
-    n := len(worker.servers)
-    worker.servers = worker.servers[0: n + 1]
-    worker.servers[n] = server
+    n := len(worker.clients)
+    worker.clients = worker.clients[0: n + 1]
+    worker.clients[n] = server
     return
 }
 
 
 // add function
 func (worker * Worker) AddFunction(funcname string,
-    f JobFunction) (err os.Error) {
-    worker.mutex.Lock()
-    defer worker.mutex.Unlock()
-
+    f JobFunction, timeout uint32) (err os.Error) {
     if f == nil {
         return os.NewError("Job function should not be nil.")
     }
+    if len(worker.clients) < 1 {
+        return os.NewError("Did not connect to Job Server.")
+    }
+    worker.mutex.Lock()
+    defer worker.mutex.Unlock()
     worker.functions[funcname] = f
+
+    var datatype uint32
+    var data []byte
+    if timeout == 0 {
+        datatype = CAN_DO
+        data = []byte(funcname)
+    } else {
+        datatype = CAN_DO_TIMEOUT
+        data = []byte(funcname + "\x00")
+        t := uint32ToByte(timeout)
+        data = append(data, t[:] ...)
+    }
+    job := NewJob(REQ, datatype, data)
+    worker.WriteJob(job)
     return
 }
+
+// remove function
+func (worker * Worker) RemoveFunction(funcname string) (err os.Error) {
+    worker.mutex.Lock()
+    defer worker.mutex.Unlock()
+
+    if worker.functions[funcname] == nil {
+        return os.NewError("No function named: " + funcname)
+    }
+    worker.functions[funcname] = nil, false
+    job := NewJob(REQ, CANT_DO, []byte(funcname))
+    worker.WriteJob(job)
+    return
+}
+
 // work
 func (worker * Worker) Work() {
-    for k, _ := range worker.functions {
-        job := NewJob(nil, REQ, CAN_DO, []byte(k))
-        worker.Write(job)
-    }
-
-    for _, v := range worker.servers {
+    for _, v := range worker.clients {
         go v.Work()
     }
     for worker.running {
@@ -78,47 +109,51 @@ func (worker * Worker) Work() {
                 if job == nil {
                     break
                 }
-                switch job.DataType {
+                switch job.dataType {
+                    case NO_JOB:
+                        // do nothing
+                        log.Println(job)
                     case ERROR:
-                        log.Panicln(string(job.Data))
-                    default:
-                        if err := worker.Exec(job); err != nil {
+                        log.Println(string(job.Data))
+                    case JOB_ASSIGN, JOB_ASSIGN_UNIQ:
+                        if err := worker.exec(job); err != nil {
                             log.Panicln(err)
                         }
+                        continue
+                    default:
+                        worker.Queue <- job
                 }
-                worker.queue <- job
         }
     }
 }
 
 func (worker * Worker) Result() (job *Job) {
-    if l := len(worker.queue); l != 1 {
+    if l := len(worker.Queue); l != 1 {
         if l == 0 {
             return
         }
         for i := 0; i < l - 1; i ++ {
-            <-worker.queue
+            <-worker.Queue
         }
     }
-    return <-worker.queue
+    return <-worker.Queue
 }
 
 // Close
 // should used as defer
 func (worker * Worker) Close() (err os.Error){
     worker.running = false
-    for _, v := range worker.servers {
+    for _, v := range worker.clients {
         err = v.Close()
     }
     close(worker.incoming)
     return err
 }
 
-func (worker * Worker) Write(job *Job) (err os.Error) {
+func (worker * Worker) WriteJob(job *Job) (err os.Error) {
     e := make(chan os.Error)
-    for _, v := range worker.servers {
+    for _, v := range worker.clients {
         go func() {
-            job.client = v
             e <- v.WriteJob(job)
         }()
     }
@@ -127,11 +162,61 @@ func (worker * Worker) Write(job *Job) (err os.Error) {
 
 // Echo
 func (worker * Worker) Echo(data []byte) (err os.Error) {
-    job := NewJob(nil, REQ, ECHO_REQ, data)
-    return worker.Write(job)
+    job := NewJob(REQ, ECHO_REQ, data)
+    return worker.WriteJob(job)
+}
+
+// Reset
+func (worker * Worker) Reset() (err os.Error){
+    job := NewJob(REQ, RESET_ABILITIES, nil)
+    return worker.WriteJob(job)
+}
+
+// SetId
+func (worker * Worker) SetId(id string) (err os.Error) {
+    job := NewJob(REQ, SET_CLIENT_ID, []byte(id))
+    return worker.WriteJob(job)
 }
 
 // Exec
-func (worker * Worker) Exec(job *Job) (err os.Error) {
+func (worker * Worker) exec(job *Job) (err os.Error) {
+    jobdata := splitByteArray(job.Data, '\x00')
+    job.Handle = string(jobdata[0])
+    funcname := string(jobdata[1])
+    if job.dataType == JOB_ASSIGN {
+        job.Data = jobdata[2]
+    } else {
+        job.UniqueId = string(jobdata[2])
+        job.Data = jobdata[3]
+    }
+    result, err := worker.functions[funcname](job)
+    var datatype uint32
+    if err == nil {
+        datatype = WORK_COMPLETE
+    } else{
+        if result == nil {
+            datatype = WORK_FAIL
+        } else {
+            datatype = WORK_EXCEPTION
+        }
+    }
+    worker.WriteJob(NewJob(REQ, datatype, result))
+    return
+}
+
+func splitByteArray(slice []byte, spot byte) (data [][]byte){
+    data = make([][]byte, 0, 10)
+    log.Println(data)
+    start, end := 0, 0
+    for i, v := range slice {
+        if v == spot {
+            if start != end {
+                data = append(data, slice[start:end])
+            }
+            start, end = i, i
+        } else {
+            end ++
+        }
+    }
     return
 }
diff --git a/src/pkg/gearman/worker/job.go b/src/pkg/gearman/worker/job.go
new file mode 100644
index 0000000..88d0e6f
--- /dev/null
+++ b/src/pkg/gearman/worker/job.go
@@ -0,0 +1,88 @@
+package gearman
+
+import (
+    "os"
+)
+
+type Job struct {
+    Data []byte
+    Handle string
+    UniqueId string
+    client *jobClient
+    magicCode, dataType uint32
+}
+
+func byteToUint32(buf [4]byte) uint32 {
+    return uint32(buf[0]) << 24 +
+        uint32(buf[1]) << 16 +
+        uint32(buf[2]) << 8 +
+        uint32(buf[3])
+}
+
+func uint32ToByte(i uint32) (data [4]byte) {
+    data[0] = byte((i >> 24) & 0xff)
+    data[1] = byte((i >> 16) & 0xff)
+    data[2] = byte((i >> 8) & 0xff)
+    data[3] = byte(i & 0xff)
+    return
+}
+
+func NewJob(magiccode, datatype uint32, data []byte) (job *Job) {
+    return &Job{magicCode:magiccode,
+        dataType: datatype,
+        Data:data}
+}
+
+func DecodeJob(data []byte) (job *Job, err os.Error) {
+    if len(data) < 12 {
+        return nil, os.NewError("Data length is too small.")
+    }
+    datatype := byteToUint32([4]byte{data[4], data[5], data[6], data[7]})
+    l := byteToUint32([4]byte{data[8], data[9], data[10], data[11]})
+    if len(data[12:]) != int(l) {
+         return nil, os.NewError("Invalid data length.")
+    }
+    switch(byteToUint32([4]byte{data[4], data[5], data[6], data[7]})) {
+        case ECHO_RES:
+            data = data[12:]
+    }
+    return NewJob(REQ, datatype, data), err
+}
+
+func (job *Job) Encode() (data []byte) {
+    magiccode := uint32ToByte(job.magicCode)
+    datatype := uint32ToByte(job.dataType)
+    l := len(job.Data)
+    datalength := uint32ToByte(uint32(l))
+    data = make([]byte, 12 + l)
+    copy(data[:4], magiccode[:])
+    copy(data[4:8], datatype[:])
+    copy(data[8:12], datalength[:])
+    copy(data[12:], job.Data)
+    return
+}
+
+// update data
+func (job * Job) UpdateData(data []byte, iswaring bool) (err os.Error) {
+    result := append([]byte(job.Handle), 0)
+    result = append(result, data ...)
+    var datatype uint32
+    if iswaring {
+        datatype = WORK_WARNING
+    } else {
+        datatype = WORK_DATA
+    }
+    return job.client.WriteJob(NewJob(REQ, datatype, result))
+}
+
+// update status
+func (job * Job) UpdateStatus(numerator, denominator uint32) (err os.Error) {
+    n := uint32ToByte(numerator)
+    d := uint32ToByte(denominator)
+    result := append([]byte(job.Handle), 0)
+    result = append(result, n[:] ...)
+    result = append(result, d[:] ...)
+    return job.client.WriteJob(NewJob(REQ, WORK_STATUS, result))
+}
+
+
diff --git a/src/pkg/gearman/worker/jobclient.go b/src/pkg/gearman/worker/jobclient.go
new file mode 100644
index 0000000..453dc46
--- /dev/null
+++ b/src/pkg/gearman/worker/jobclient.go
@@ -0,0 +1,82 @@
+package gearman
+
+import (
+    "net"
+    "os"
+//    "log"
+)
+
+type jobClient struct {
+    conn net.Conn
+    incoming chan *Job
+    running bool
+}
+
+func newJobClient(addr string, incoming chan *Job) (jobclient *jobClient, err os.Error) {
+    conn, err := net.Dial(TCP, addr)
+    if err != nil {
+        return nil, err
+    }
+    jobclient = &jobClient{conn:conn, incoming: incoming, running:true}
+    return jobclient, err
+}
+
+func (client *jobClient) Work() (err os.Error) {
+    noop := true
+    for client.running {
+        // grab job
+        if noop {
+            client.WriteJob(NewJob(REQ, GRAB_JOB, nil))
+        }
+        var rel []byte
+        for {
+            buf := make([]byte, 2048)
+            n, err := client.conn.Read(buf)
+            if err != nil {
+                if err == os.EOF && n == 0 {
+                    break
+                }
+                return err
+            }
+            rel = append(rel, buf[0: n] ...)
+            break
+        }
+        job, err := DecodeJob(rel)
+        if err != nil {
+            return err
+        } else {
+            switch(job.dataType) {
+                case NOOP:
+                    noop = true
+                case NO_JOB:
+                    noop = false
+                    client.WriteJob(NewJob(REQ, PRE_SLEEP, nil))
+                case ECHO_RES, JOB_ASSIGN_UNIQ, JOB_ASSIGN:
+                    job.client = client
+                    client.incoming <- job
+            }
+        }
+    }
+    return
+}
+
+func (client *jobClient) WriteJob(job * Job) (err os.Error) {
+    return client.Write(job.Encode())
+}
+
+func (client *jobClient) Write(buf []byte) (err os.Error) {
+    var n int
+    for i := 0; i < len(buf); i += n {
+        n, err = client.conn.Write(buf[i:])
+        if err != nil {
+            return err
+        }
+    }
+    return
+}
+
+func (client *jobClient) Close() (err os.Error) {
+    client.running = false
+    err = client.conn.Close()
+    return
+}
diff --git a/test/Makefile b/test/Makefile
deleted file mode 100644
index cab8f72..0000000
--- a/test/Makefile
+++ /dev/null
@@ -1,17 +0,0 @@
-# Copyright 2009 The Go Authors.  All rights reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-include $(GOROOT)/src/Make.inc
-
-TARG=client
-GOFILES=\
-	client.go\
-
-CLEANFILES+=client
-
-include $(GOROOT)/src/Make.pkg
-
-%: install %.go
-	$(GC) $*.go
-	$(LD) -o $@ $*.$O
diff --git a/test/client.go b/test/client.go
deleted file mode 100644
index 7bc6b91..0000000
--- a/test/client.go
+++ /dev/null
@@ -1,74 +0,0 @@
-package main
-
-import (
-    "net"
-    "log"
-    "fmt"
-)
-
-type Client struct {
-    c * net.TCPConn
-    w chan []byte
-    r chan []byte
-}
-
-func NewClient() * Client {
-    client := new(Client)
-    wch := make(chan []byte, 2048)
-    rch := make(chan []byte, 2048)
-    client.w = wch
-    client.r = rch
-    addr, err := net.ResolveTCPAddr("127.0.0.1:4730")
-    if err != nil {
-        log.Panic(err.String())
-    }
-    c, err := net.DialTCP("tcp", nil, addr)
-    client.c = c
-    if err != nil {
-        log.Panic(err.String())
-    }
-    go client.ReadLoop()
-    go client.WriteLoop()
-    return client
-}
-
-func (client * Client) ReadLoop() {
-    for {
-        buf := make([]byte, 2048)
-        _, err := client.c.Read(buf)
-        if err != nil {
-            client.c.Close()
-            break;
-        }
-        client.r <- buf
-    }    
-}
-
-func (client * Client) WriteLoop() {
-    for {
-        select {
-            case buf := <- client.w:
-                client.c.Write(buf)            
-        }
-    }
-}
-
-func (client * Client) Write(data []byte) {
-    client.w <- data
-}
-
-func (client * Client) Read() []byte{
-    var buf []byte
-    select {
-        case buf = <- client.r:
-    }
-    return buf
-}
-
-func main() {
-    client := NewClient()
-    client.Write([]byte("TEST\r\n"))
-    for {
-        fmt.Println(client.Read())
-    }
-}