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git-svn-id: https://weed-fs.googlecode.com/svn/trunk@4 282b0af5-e82d-9cf1-ede4-77906d7719d0

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This commit is contained in:
chris.lu@gmail.com
2011-12-11 08:42:21 +00:00
parent 8fade18e40
commit da97f86447
7 changed files with 199 additions and 67 deletions
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18
weed-fs/src/pkg/directory/volume_mapping.go
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@@ -3,13 +3,17 @@ package directory
import (
"gob"
"os"
"rand"
"log"
)
type Machine struct {
Server string //<server name/ip>[:port]
}
type Mapper struct {
dir string
fileName string
Virtual2physical map[uint32][]uint32
Virtual2physical map[uint32][]Machine
}
func NewMapper(dirname string, filename string) (m *Mapper) {
@@ -21,17 +25,21 @@ func NewMapper(dirname string, filename string) (m *Mapper) {
if e != nil {
log.Fatalf("Mapping File Read [ERROR] %s\n", e)
} else {
m.Virtual2physical = make(map[uint32][]uint32)
m.Virtual2physical = make(map[uint32][]Machine)
decoder := gob.NewDecoder(dataFile)
decoder.Decode(m.Virtual2physical)
dataFile.Close()
}
return
}
func (m *Mapper) Get(vid uint32) []uint32 {
func (m *Mapper) PickForWrite() []Machine {
vid := uint32(rand.Intn(len(m.Virtual2physical)))
return m.Virtual2physical[vid]
}
func (m *Mapper) Get(vid uint32) []Machine {
return m.Virtual2physical[vid]
}
func (m *Mapper) Add(vid uint32, pids ...uint32) {
func (m *Mapper) Add(vid uint32, pids ...Machine) {
m.Virtual2physical[vid] = append(m.Virtual2physical[vid], pids...)
}
func (m *Mapper) Save() {
@@ -41,7 +49,7 @@ func (m *Mapper) Save() {
log.Fatalf("Mapping File Save [ERROR] %s\n", e)
}
defer dataFile.Close()
m.Virtual2physical = make(map[uint32][]uint32)
m.Virtual2physical = make(map[uint32][]Machine)
encoder := gob.NewEncoder(dataFile)
encoder.Encode(m.Virtual2physical)
}