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IDS Forum

Re: Logical Log files MISSING

Posted By: VIKAS HIVARKAR
Date: Wednesday, 15 October 2008, at 1:56 a.m.

In Response To: Re: Logical Log files MISSING (Martin Fuerderer)

Hi,

Here is some content of the log file.

Program over.
Backup to directory error: Cannot rename file from /db/informix/logicallog/ONTL_proddb_1_Tue_Oct_14_22_24_36_2008 to /
db/informix/logicallog/proddb_1_Log0000021945, errno = 2
Backup to directory error: Cannot remove file /db/informix/logicallog/ONTL_proddb_1_Tue_Oct_14_22_24_36_2008, errno =
2

Performing automatic backup of logical logs.

File created: /db/informix/logicallog/proddb_1_Log0000021942
File created: /db/informix/logicallog/proddb_1_Log0000021943
File created: /db/informix/logicallog/proddb_1_Log0000021944
Logbackup failed -

Program over.

Performing automatic backup of logical logs.

Program over.

Performing automatic backup of logical logs.

Program over.
Backup to directory error: Cannot rename file from /db/informix/logicallog/ONTL_proddb_1_Tue_Oct_14_22_24_48_2008 to /
db/informix/logicallog/proddb_1_Log0000021949, errno = 2
Backup to directory error: Cannot remove file /db/informix/logicallog/ONTL_proddb_1_Tue_Oct_14_22_24_48_2008, errno =
2

Performing automatic backup of logical logs.

File created: /db/informix/logicallog/proddb_1_Log0000021946
File created: /db/informix/logicallog/proddb_1_Log0000021947
File created: /db/informix/logicallog/proddb_1_Log0000021948
Logbackup failed -

Program over.

Performing automatic backup of logical logs.

File created: /db/informix/logicallog/proddb_1_Log0000021950
Do you want to back up the current logical log? (y/n) n

Program over.

Performing automatic backup of logical logs.

Program over.
Backup to directory error: Cannot rename file from /db/informix/logicallog/ONTL_proddb_1_Tue_Oct_14_22_24_59_2008 to /
db/informix/logicallog/proddb_1_Log0000021952, errno = 2
Backup to directory error: Cannot remove file /db/informix/logicallog/ONTL_proddb_1_Tue_Oct_14_22_24_59_2008, errno =
2

Performing automatic backup of logical logs.

File created: /db/informix/logicallog/proddb_1_Log0000021951
Logbackup failed -

Program over.

and the files are missing :(

Martin, now can we 100% say that the respective defect is: idsdb00165611 (for IDS 11.10)?

Regards
Vikas
--------------------------------------------------------
-------------------------

Hi,

most likely (> 98%), the problem is what Davis described
in his answer (see below). If you want to be 100% sure,
then you have to modify your alarm program script (or
whatever script/program actually executes the ontape
command) to capture the output of the ontape processes
in a file. If you see messages indicating that some
temporary file cannot be renamed and/or removed
because it does not exist (errno 2), then this is the
described problem.

Besides taking a level-0 archive when the situation of
log file backup loss occured, you may consider the
following to improve the situation:

a) in your script/program add some code to first
check whether an "ontape -a -d" command is already
being executed (e.g. using "ps ..." output). If so, then
do not start a new "ontape -a -d". The one that is
running will backup all the used log files anyway
(except the current log file).
Note: this is not 100% error proof as there still is a

gap between checking for a running "ontape -a -d"

process and starting a new one.

b) Capture all ontape output (stdout and stderr) to a
file and put in your alarm program some additional
code to check this file for above dscribed errors.
If such an error is detected, write a warning (to online.log
or whatever) because now surely it is time to do a
level-0 archive ...
Note: this may also not bee 100% error proof. An error

may still slip your attention. It highly depends on the

implementation of the error checking/scanning ...

c) The respective defect is: idsdb00165611 (for IDS 11.10).
While in the upcoming 11.50.xC3 this is fixed already,
you may contact IBM Informix Tech Support (check
your contract) to get a fix of this problem for
your IDS 11.10 ...

Regards,
Martin

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