# HG changeset patch
# User Laman
# Date 2016-03-26 12:56:44
# Node ID 3a359a8a2134889673ba6d2d9e8b0a7404daf9ed
# Parent  72963904714e2c92b1a0e0b744800d162db1eb87

optimizing disk access

diff --git a/work.py b/work.py
--- a/work.py
+++ b/work.py
@@ -86,7 +86,7 @@ def transferChanges(targetPath):
 			
 		# transfer modified sectors and mark them as clean
 		sectorIds=handle.fetchall()
-		for (sectorId,) in sectorIds:
+		'''for (sectorId,) in sectorIds:
 			path=targetPath / getPath(sectorId)
 			try: path.parent.mkdir(parents=True)
 			except FileExistsError: pass
@@ -94,16 +94,31 @@ def transferChanges(targetPath):
 			sf.seek(sectorId)
 			df.write(sf.read(BLOCK_SIZE))
 			handle.execute("""update `hashes` set `dirty`=0 where `sector_id`=?""",(sectorId,))
-			db.commit()
+			db.commit()'''
+		sector=sf.read(BLOCK_SIZE)
+		i=j=0
+		while sector and j<len(sectorIds):
+			if i==sectorIds[j][0]:
+				path=targetPath / getPath(sectorId)
+				try: path.parent.mkdir(parents=True)
+				except FileExistsError: pass
+				df=path.open(mode="wb")
+				df.write(sector)
+				handle.execute("""update `hashes` set `dirty`=0 where `sector_id`=?""",(sectorIds[j][0],))
+				db.commit()
+				j+=1
+			i+=1
+			sector=sf.read(BLOCK_SIZE)
 
 def getPath(index):
 	nodeIds=[]
 	k=1
 	while k<=FILE_COUNT:
-		nodeIds.append(index//k)
+		paddedLen=int(math.log10(FILE_COUNT/k))
+		nodeIds.append("{0:0{1}}",index//k,paddedLen)
 		k*=FILES_PER_DIR
 	nodeIds.reverse()
-	return pathlib.Path(*[str(id) for id in nodeIds])
+	return pathlib.Path(*[id for id in enumerate(nodeIds)])
 
 action=sys.argv[1]
 fileName=sys.argv[2]