You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
96 lines
3.2 KiB
96 lines
3.2 KiB
package replication
|
|
|
|
import (
|
|
"bytes"
|
|
"code.google.com/p/weed-fs/go/glog"
|
|
"code.google.com/p/weed-fs/go/operation"
|
|
"code.google.com/p/weed-fs/go/storage"
|
|
"code.google.com/p/weed-fs/go/util"
|
|
"net/http"
|
|
"strconv"
|
|
)
|
|
|
|
func ReplicatedWrite(masterNode string, s *storage.Store, volumeId storage.VolumeId, needle *storage.Needle, r *http.Request) (size uint32, errorStatus string) {
|
|
ret, err := s.Write(volumeId, needle)
|
|
needToReplicate := !s.HasVolume(volumeId)
|
|
if err != nil {
|
|
errorStatus = "Failed to write to local disk (" + err.Error() + ")"
|
|
} else if ret > 0 {
|
|
needToReplicate = needToReplicate || s.GetVolume(volumeId).NeedToReplicate()
|
|
} else {
|
|
errorStatus = "Failed to write to local disk"
|
|
}
|
|
if !needToReplicate && ret > 0 {
|
|
needToReplicate = s.GetVolume(volumeId).NeedToReplicate()
|
|
}
|
|
if needToReplicate { //send to other replica locations
|
|
if r.FormValue("type") != "replicate" {
|
|
if !distributedOperation(masterNode, s, volumeId, func(location operation.Location) bool {
|
|
_, err := operation.Upload("http://"+location.Url+r.URL.Path+"?type=replicate&ts="+strconv.FormatUint(needle.LastModified, 10), string(needle.Name), bytes.NewReader(needle.Data), needle.IsGzipped(), string(needle.Mime))
|
|
return err == nil
|
|
}) {
|
|
ret = 0
|
|
errorStatus = "Failed to write to replicas for volume " + volumeId.String()
|
|
}
|
|
}
|
|
}
|
|
if errorStatus != "" {
|
|
if _, err = s.Delete(volumeId, needle); err != nil {
|
|
errorStatus += "\nCannot delete " + strconv.FormatUint(needle.Id, 10) + " from " +
|
|
volumeId.String() + ": " + err.Error()
|
|
} else {
|
|
distributedOperation(masterNode, s, volumeId, func(location operation.Location) bool {
|
|
return nil == util.Delete("http://"+location.Url+r.URL.Path+"?type=replicate")
|
|
})
|
|
}
|
|
}
|
|
size = ret
|
|
return
|
|
}
|
|
|
|
func ReplicatedDelete(masterNode string, store *storage.Store, volumeId storage.VolumeId, n *storage.Needle, r *http.Request) (ret uint32) {
|
|
ret, err := store.Delete(volumeId, n)
|
|
if err != nil {
|
|
glog.V(0).Infoln("delete error:", err)
|
|
return
|
|
}
|
|
|
|
needToReplicate := !store.HasVolume(volumeId)
|
|
if !needToReplicate && ret > 0 {
|
|
needToReplicate = store.GetVolume(volumeId).NeedToReplicate()
|
|
}
|
|
if needToReplicate { //send to other replica locations
|
|
if r.FormValue("type") != "replicate" {
|
|
if !distributedOperation(masterNode, store, volumeId, func(location operation.Location) bool {
|
|
return nil == util.Delete("http://"+location.Url+r.URL.Path+"?type=replicate")
|
|
}) {
|
|
ret = 0
|
|
}
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func distributedOperation(masterNode string, store *storage.Store, volumeId storage.VolumeId, op func(location operation.Location) bool) bool {
|
|
if lookupResult, lookupErr := operation.Lookup(masterNode, volumeId.String()); lookupErr == nil {
|
|
length := 0
|
|
selfUrl := (store.Ip + ":" + strconv.Itoa(store.Port))
|
|
results := make(chan bool)
|
|
for _, location := range lookupResult.Locations {
|
|
if location.Url != selfUrl {
|
|
length++
|
|
go func(location operation.Location, results chan bool) {
|
|
results <- op(location)
|
|
}(location, results)
|
|
}
|
|
}
|
|
ret := true
|
|
for i := 0; i < length; i++ {
|
|
ret = ret && <-results
|
|
}
|
|
return ret
|
|
} else {
|
|
glog.V(0).Infoln("Failed to lookup for", volumeId, lookupErr.Error())
|
|
}
|
|
return false
|
|
}
|