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import struct
import sys
# bytes per single LRU entry
blocksize=8
flru = open(sys.argv[1], 'rb')
L = []
while True:
s1 = flru.read(blocksize)
if s1=="":
break;
# InnoDB uses big-endian format for storage
val = struct.unpack('>II', s1)
if (val[0]>0) or (val[1]>0):
L.append(val)
print "Length:", len(L)
L.sort()
flru.close()
fsorted = open(sys.argv[1], 'wb')
for item in L:
# InnoDB uses big-endian format for storage
pk=struct.pack('>II', item[0],item[1])
fsorted.write(pk)
pk=struct.pack('>II',0,0);
for i in range(0, 16*1024 / 8):
fsorted.write(pk)
fsorted.close()
print "Done!"
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