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can now delete a collection! Is this a dangerous feature? Only enabling

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deleting "benchmark" collections for now.
This commit is contained in:
Chris Lu
2014-03-10 11:43:54 -07:00
parent a121453188
commit cd10c277b2
13 changed files with 130 additions and 8 deletions
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18
go/topology/volume_layout.go
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@@ -8,6 +8,7 @@ import (
"sync"
)
// mapping from volume to its locations, inverted from server to volume
type VolumeLayout struct {
rp *storage.ReplicaPlacement
vid2location map[storage.VolumeId]*VolumeLocationList
@@ -56,6 +57,13 @@ func (vl *VolumeLayout) Lookup(vid storage.VolumeId) []*DataNode {
return nil
}
func (vl *VolumeLayout) ListVolumeServers() (nodes []*DataNode) {
for _, location := range vl.vid2location {
nodes = append(nodes, location.list...)
}
return
}
func (vl *VolumeLayout) PickForWrite(count int, dataCenter string) (*storage.VolumeId, int, *VolumeLocationList, error) {
len_writers := len(vl.writables)
if len_writers <= 0 {
@@ -134,10 +142,12 @@ func (vl *VolumeLayout) SetVolumeUnavailable(dn *DataNode, vid storage.VolumeId)
vl.accessLock.Lock()
defer vl.accessLock.Unlock()
if vl.vid2location[vid].Remove(dn) {
if vl.vid2location[vid].Length() < vl.rp.GetCopyCount() {
glog.V(0).Infoln("Volume", vid, "has", vl.vid2location[vid].Length(), "replica, less than required", vl.rp.GetCopyCount())
return vl.removeFromWritable(vid)
if location, ok := vl.vid2location[vid]; ok {
if location.Remove(dn) {
if location.Length() < vl.rp.GetCopyCount() {
glog.V(0).Infoln("Volume", vid, "has", location.Length(), "replica, less than required", vl.rp.GetCopyCount())
return vl.removeFromWritable(vid)
}
}
}
return false