def getActualSize(self, partitions, diskset):
"""Return the actual size allocated for the request in megabytes."""
# this seems like a check which should never fail...
if not self.raidmembers or not self.raidlevel:
return 0
nummembers = len(self.raidmembers) - self.raidspares
smallest = None
sum = 0
for member in self.raidmembers:
req = partitions.getRequestByID(member)
partsize = req.getActualSize(partitions, diskset)
if raid.isRaid0(self.raidlevel):
sum = sum + partsize
else:
if not smallest:
smallest = partsize
elif partsize < smallest:
smallest = partsize
if raid.isRaid0(self.raidlevel):
return sum
elif raid.isRaid1(self.raidlevel):
return smallest
elif raid.isRaid5(self.raidlevel):
return (nummembers - 1) * smallest
elif raid.isRaid6(self.raidlevel):
return (nummembers - 2) * smallest
elif raid.isRaid10(self.raidlevel):
return (nummembers / 2) * smallest
else:
raise ValueError, "Invalid raidlevel in RaidRequest.getActualSize"
def getActualSize(self, partitions, diskset):
"""Return the actual size allocated for the request in megabytes."""
# this seems like a check which should never fail...
if not self.raidmembers or not self.raidlevel:
return 0
nummembers = len(self.raidmembers) - self.raidspares
smallest = None
sum = 0
for member in self.raidmembers:
req = partitions.getRequestByID(member)
partsize = req.getActualSize(partitions, diskset)
if raid.isRaid0(self.raidlevel):
sum = sum + partsize
else:
if not smallest:
smallest = partsize
elif partsize < smallest:
smallest = partsize
if raid.isRaid0(self.raidlevel):
return sum
elif raid.isRaid1(self.raidlevel):
return smallest
elif raid.isRaid5(self.raidlevel):
return (nummembers-1) * smallest
elif raid.isRaid6(self.raidlevel):
return (nummembers-2) * smallest
elif raid.isRaid10(self.raidlevel):
return (nummembers/2) * smallest
else:
raise ValueError, "Invalid raidlevel in RaidRequest.getActualSize"
def isRaid0(raidlevel):
"""Return whether raidlevel is a valid descriptor of RAID1."""
return raid.isRaid0(raidlevel)