[ZODB-Dev] Problems with Transactions and FileStorage size

[Heiko Hees]

Hi,

i am looking for a switch, to prevent logging of transactions, since 
this seems to heavily grow file size.

if i run the following program (first run generates an object with an 
array, second run changes the array an commits a 1000 times) file size
grows as follows:

heiko@julie:~/tests/persistent$ ls -al a*
-rw-r--r--    1 heiko    heiko        3158 Jul 19 14:08 a
-rw-r--r--    1 heiko    heiko           3 Jul 19 14:08 a.lock
-rw-r--r--    1 heiko    heiko        2966 Jul 19 14:08 a.tmp
heiko@julie:~/tests/persistent$ ./dbsizeTest.py a
heiko@julie:~/tests/persistent$ ls -al a*
-rw-r--r--    1 heiko    heiko     2856903 Jul 19 14:08 a
-rw-r--r--    1 heiko    heiko           3 Jul 19 14:08 a.lock
-rw-r--r--    1 heiko    heiko        2823 Jul 19 14:08 a.tmp

does anyone have a hint other than running db.pack()?

heiko

the program:

#!/usr/bin/python
import ZODB, sys,time
from Persistence import Persistent
from ZODB import FileStorage, DB

class X(Persistent):
     def __init__(self):
         self.a = []
         for i in range(1000):
             self.a.append(i)
         self._p_changed = 1

     def change(self):
         self.a[0] +=1
         self._p_changed = 1



db = DB( FileStorage.FileStorage(sys.argv[1]) )
connection = db.open()
root = connection.root()


if not root.has_key('x'):
     # first run
     root['x'] = X()
     get_transaction().commit()
else:
     # second run
     for i in range(1000):
         root['x'].change()
         get_transaction().commit()

connection.close()


-- 
brainbot technologies ag
schwalbacherstr. 74   65183 wiesbaden . germany
vox +49 611 238505-0  fax ++49 611 238505-1
http://brainbot.com/  mailto:heiko@brainbot.com