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adjust replica placement after move

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This commit is contained in:
Chris Lu 2020-09-12 01:01:19 -07:00
parent 2a0925590c
commit e2c741f76f
1 changed files with 22 additions and 7 deletions
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29
weed/shell/command_volume_balance.go
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@ -40,12 +40,12 @@ func (c *commandVolumeBalance) Help() string {
}
func balanceWritableVolumes(){
idealWritableVolumes = totalWritableVolumes / numVolumeServers
idealWritableVolumeRatio = totalWritableVolumes / totalNumberOfMaxVolumes
for hasMovedOneVolume {
sort all volume servers ordered by the number of local writable volumes
pick the volume server B with the highest number of writable volumes y
for any the volume server A with the number of writable volumes x +1 <= idealWritableVolume {
if y > idealWritableVolumes and x +1 <= idealWritableVolumes {
sort all volume servers ordered by the localWritableVolumeRatio = localWritableVolumes to localVolumeMax
pick the volume server B with the highest localWritableVolumeRatio y
for any the volume server A with the number of writable volumes x + 1 <= idealWritableVolumeRatio * localVolumeMax {
if y > localWritableVolumeRatio {
if B has a writable volume id v that A does not have, and satisfy v replication requirements {
move writable volume v from A to B
}
@ -242,8 +242,7 @@ func attemptToMoveOneVolume(commandEnv *CommandEnv, volumeReplicas map[uint32][]
}
if _, found := emptyNode.selectedVolumes[v.Id]; !found {
if err = moveVolume(commandEnv, v, fullNode, emptyNode, applyBalancing); err == nil {
delete(fullNode.selectedVolumes, v.Id)
emptyNode.selectedVolumes[v.Id] = v
adjustAfterMove(v, volumeReplicas, fullNode, emptyNode)
hasMoved = true
break
} else {
@ -312,3 +311,19 @@ func isGoodMove(placement *super_block.ReplicaPlacement, existingReplicas []*Vol
return true
}
func adjustAfterMove(v *master_pb.VolumeInformationMessage, volumeReplicas map[uint32][]*VolumeReplica, fullNode *Node, emptyNode *Node) {
delete(fullNode.selectedVolumes, v.Id)
emptyNode.selectedVolumes[v.Id] = v
existingReplicas := volumeReplicas[v.Id]
for _, replica := range existingReplicas {
if replica.location.dataNode.Id == fullNode.info.Id &&
replica.location.rack == fullNode.rack &&
replica.location.dc == fullNode.dc {
replica.location.dc = emptyNode.dc
replica.location.rack = emptyNode.rack
replica.location.dataNode = emptyNode.info
return
}
}
}