重新存储zodbpack错误

Question

每当我尝试运行zobbpack时，我都会生成错误：

column copg2.IntegrityError:列"zoid“中的空值违反了非空约束

你知道是什么原因造成的吗?如何修复它？

relstorage 1.5.1、postgres 8、plone 4.2.1.1

2012-12-03 13:18:03,485 [zodbpack] INFO Opening storage (RelStorageFactory)...
2012-12-03 13:18:03,525 [zodbpack] INFO Packing storage (RelStorageFactory).
2012-12-03 13:18:03,533 [relstorage] INFO pack: beginning pre-pack
2012-12-03 13:18:03,533 [relstorage] INFO pack: analyzing transactions committed Mon Nov 26 12:31:54 2012 or before
2012-12-03 13:18:03,536 [relstorage.adapters.packundo] INFO pre_pack: start with gc enabled
2012-12-03 13:18:03,759 [relstorage.adapters.packundo] INFO analyzing references from objects in 97907 new transaction(s)
2012-12-03 13:18:03,761 [relstorage.adapters.scriptrunner] WARNING script statement failed: '\n        INSERT INTO object_refs_added (tid)\n        VALUES (%(tid)s)\n        '; parameters: {'tid': 0L}
2012-12-03 13:18:03,761 [relstorage.adapters.packundo] ERROR pre_pack: failed
Traceback (most recent call last):
  File "/usr/local/lib64/python2.6/site-packages/RelStorage-1.5.1-py2.6.egg/relstorage/adapters/packundo.py", line 486, in pre_pack
    conn, cursor, pack_tid, get_references)
  File "/usr/local/lib64/python2.6/site-packages/RelStorage-1.5.1-py2.6.egg/relstorage/adapters/packundo.py", line 580, in _pre_pack_with_gc
    self.fill_object_refs(conn, cursor, get_references)
  File "/usr/local/lib64/python2.6/site-packages/RelStorage-1.5.1-py2.6.egg/relstorage/adapters/packundo.py", line 387, in fill_object_refs
    self._add_refs_for_tid(cursor, tid, get_references)
  File "/usr/local/lib64/python2.6/site-packages/RelStorage-1.5.1-py2.6.egg/relstorage/adapters/packundo.py", line 459, in _add_refs_for_tid
    self.runner.run_script_stmt(cursor, stmt, {'tid': tid})
  File "/usr/local/lib64/python2.6/site-packages/RelStorage-1.5.1-py2.6.egg/relstorage/adapters/scriptrunner.py", line 52, in run_script_stmt
    cursor.execute(stmt, generic_params)
IntegrityError: null value in column "zoid" violates not-null constraint

Traceback (most recent call last):
  File "zodbpack.py", line 86, in <module>
    main()
  File "zodbpack.py", line 78, in main
    skip_prepack=options.reuse_prepack)
  File "/usr/local/lib64/python2.6/site-packages/RelStorage-1.5.1-py2.6.egg/relstorage/storage.py", line 1114, in pack
    adapter.packundo.pre_pack(tid_int, get_references)
  File "/usr/local/lib64/python2.6/site-packages/RelStorage-1.5.1-py2.6.egg/relstorage/adapters/packundo.py", line 486, in pre_pack
    conn, cursor, pack_tid, get_references)
  File "/usr/local/lib64/python2.6/site-packages/RelStorage-1.5.1-py2.6.egg/relstorage/adapters/packundo.py", line 580, in _pre_pack_with_gc
    self.fill_object_refs(conn, cursor, get_references)
  File "/usr/local/lib64/python2.6/site-packages/RelStorage-1.5.1-py2.6.egg/relstorage/adapters/packundo.py", line 387, in fill_object_refs
    self._add_refs_for_tid(cursor, tid, get_references)
  File "/usr/local/lib64/python2.6/site-packages/RelStorage-1.5.1-py2.6.egg/relstorage/adapters/packundo.py", line 459, in _add_refs_for_tid
    self.runner.run_script_stmt(cursor, stmt, {'tid': tid})
  File "/usr/local/lib64/python2.6/site-packages/RelStorage-1.5.1-py2.6.egg/relstorage/adapters/scriptrunner.py", line 52, in run_script_stmt
    cursor.execute(stmt, generic_params)
psycopg2.IntegrityError: null value in column "zoid" violates not-null constraint

Answer 1

在没有启用GC的情况下运行zodbpack.py (感谢Martijn)可以工作，并使数据库从3.8 GC压缩到887Mb。

所以我的zodbpack-conf.xml看起来像这样：

<relstorage>
  pack-gc false
  <postgresql>
    dsn dbname='zodb' user='user' host='host' password='password'
  </postgresql>
</relstorage>

我用以下命令运行它：

python zodbpack.py -d 7 zodbpack-conf.xml

注意:包完成后，您仍然需要清空数据库以收回空间。我从命令行运行此命令：

psql zodb postgresuser
zodb=# SELECT pg_database_size('zodb');
zodb=# vacuum full;
zodb=# SELECT pg_database_size('zodb');

有趣的是，当我从ZMI控制面板运行pack命令时，我仍然得到和以前一样的错误：

Site Error

An error was encountered while publishing this resource.

Error Type: IntegrityError
Error Value: null value in column "zoid" violates not-null constraint 

所以我假设ZMI包启用了GC，并且我的站点数据库中仍然存在空值的问题……

我是否应该尝试运行一些SQL来清除它？如果一个对象没有'zoid‘值，那么它实际上是不能访问的垃圾吗？这方面的SQL示例也会很棒:)