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[rdiff-backup-users] What happens if rdiff-backup crashes during a backu

From: Vahid Pazirandeh
Subject: [rdiff-backup-users] What happens if rdiff-backup crashes during a backup?
Date: Mon, 25 Jun 2007 15:32:32 -0700

Hi All,

I love rdiff-backup.  However, I don't like how fragile it is when it crashes during a backup.  Let's say the client pushes some backup data to a remote server, but in the middle of a file transfer, the remote server's network goes out.  The next time rdiff-backup is executed, it immediately gets an error (I've pasted it below).  The error is due to some files in the remote rdiff-backup-data dir being corrupt / out of sync.

The FAQ says to manually clean up the dirty files: http://rdiff-backup.nongnu.org/FAQ.html#regress_failure
This works, but I have two problems with it: it requires manual intervention; and I can't seem to clean my files without losing some backup data (maybe I'm just doing it wrong, since the FAQ claims it can be done without any data loss).  Actually I have a third problem: it doesn't always work.  I'm doing some crash tests and I'm having difficulty bringing my data back to life.  =/

I've seen some others with the same problems, but I don't see any response:

rsync handles this fine, since it doesn't have to deal with all these meta files.  But it obviously doesn't have file revision history, which is a feature I'd like.

So, how does everyone deal with problems like this?
(please CC my gmail email address in your reply)

Here's the actual error I receive.  This occurs every time rdiff-backup is run since the files in rdiff-backup-data (on the destination server) are corrupt.  The most recent call is on the bottom:

------- snip snip ------
Exception '' raised of class '<type 'exceptions.AssertionError'>':
  File "/usr/local/lib/python2.5/site-packages/rdiff_backup/Main.py", line 299, in error_check_Main
    try: Main(arglist)
  File "/usr/local/lib/python2.5/site-packages/rdiff_backup/Main.py", line 319, in Main
  File "/usr/local/lib/python2.5/site-packages/rdiff_backup/Main.py", line 275, in take_action
    elif action == "backup": Backup(rps[0], rps[1])
  File "/usr/local/lib/python2.5/site-packages/rdiff_backup/Main.py", line 332, in Backup
  File "/usr/local/lib/python2.5/site-packages/rdiff_backup/Main.py", line 432, in backup_final_init
  File "/usr/local/lib/python2.5/site-packages/rdiff_backup/Main.py", line 827, in checkdest_if_necessary
    need_check = checkdest_need_check(dest_rp)
  File "/usr/local/lib/python2.5/site-packages/rdiff_backup/Main.py", line 817, in checkdest_need_check
    if not force: curmir_incs[0].conn.regress.check_pids(curmir_incs)
  File "/usr/local/lib/python2.5/site-packages/rdiff_backup/connection.py", line 448, in __call__
    return apply(self.connection.reval , (self.name,) + args)
  File "/usr/local/lib/python2.5/site-packages/rdiff_backup/connection.py", line 367, in reval
    for arg in args: self._put(arg, req_num)
  File "/usr/local/lib/python2.5/site-packages/rdiff_backup/connection.py", line 139, in _put
    else: self._putobj(obj, req_num)
  File "/usr/local/lib/python2.5/site-packages/rdiff_backup/connection.py", line 144, in _putobj
    self._write("o", pickle.dumps(obj, 1), req_num)
  File "/usr/local/lib/python2.5/pickle.py", line 1366, in dumps
    Pickler(file, protocol).dump(obj)
  File "/usr/local/lib/python2.5/pickle.py", line 224, in dump
  File "/usr/local/lib/python2.5/pickle.py", line 286, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/local/lib/python2.5/pickle.py", line 600, in save_list
  File "/usr/local/lib/python2.5/pickle.py", line 633, in _batch_appends
  File "/usr/local/lib/python2.5/pickle.py", line 286, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/local/lib/python2.5/pickle.py", line 723, in save_inst
    stuff = getstate()
  File "/usr/local/lib/python2.5/site-packages/rdiff_backup/rpath.py", line 760, in __getstate__
    assert self.conn is Globals.local_connection
------- snip snip ------

Vahid Pazirandeh

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