seaweedfs/go/storage/replica_placement.go
Chris Lu b9aee2defb add TTL support
The volume TTL and file TTL are not necessarily the same. as long as
file TTL is smaller than volume TTL, it'll be fine.

volume TTL is used when assigning file id, e.g.
http://.../dir/assign?ttl=3h

file TTL is used when uploading
2014-09-20 12:38:59 -07:00

54 lines
1.2 KiB
Go

package storage
import (
"errors"
"fmt"
)
type ReplicaPlacement struct {
SameRackCount int
DiffRackCount int
DiffDataCenterCount int
}
func NewReplicaPlacementFromString(t string) (*ReplicaPlacement, error) {
rp := &ReplicaPlacement{}
for i, c := range t {
count := int(c - '0')
if 0 <= count && count <= 2 {
switch i {
case 0:
rp.DiffDataCenterCount = count
case 1:
rp.DiffRackCount = count
case 2:
rp.SameRackCount = count
}
} else {
return rp, errors.New("Unknown Replication Type:" + t)
}
}
return rp, nil
}
func NewReplicaPlacementFromByte(b byte) (*ReplicaPlacement, error) {
return NewReplicaPlacementFromString(fmt.Sprintf("%03d", b))
}
func (rp *ReplicaPlacement) Byte() byte {
ret := rp.DiffDataCenterCount*100 + rp.DiffRackCount*10 + rp.SameRackCount
return byte(ret)
}
func (rp *ReplicaPlacement) String() string {
b := make([]byte, 3)
b[0] = byte(rp.DiffDataCenterCount + '0')
b[1] = byte(rp.DiffRackCount + '0')
b[2] = byte(rp.SameRackCount + '0')
return string(b)
}
func (rp *ReplicaPlacement) GetCopyCount() int {
return rp.DiffDataCenterCount + rp.DiffRackCount + rp.SameRackCount + 1
}