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IDS Forum

RE: HDR problem - ontape -p

Posted By: Support Informix
Date: Monday, 27 June 2005, at 8:42 a.m.

In Response To: HDR problem - ontape -p (SAGAR THANAWALA)

1] When I do ontape -p , it does ask me "take logical backup [Y/N] ?"
What should I do ?

answer No.
This means that your secondary server has been initialised and has some
logs that are not been backuped. Your secondary server may be new, without
a first initialisation. We do a complete restore, don't we ?

2] Why doesnt the restore complete ? Have you wait enough time ? do you see
disk activity with iostat or something else ?

I have made 2 litte informixservers and constructs HDR between them. So i
knew which behaviour and messages to expect.

3] The level-0 backup on primary takes around 10 hours , should the restore
take more than that or how much time should the "ontape -p" run ?

Almost more, if both servers have the same hardware and same applications.
My experience :the restore of the logs take a long, long time.

4] When it does complete, whats should be the status of the informix server
i.e. "onstat - " should show what output ?

After completion the secondary server will always stays in Recovery Mode
(Read Only). I'm not so sure from the "Read Only" in the banner.



I've tested HDR in informix7.3 as follows :

on primary :
ontape -s -L 0
onmode -d primary g_oebarrep # set as primary

on secondary :
ontape -p (in log file : Recovery mode)
onmode -d secondary g_oebar (in log : DR: Start failure recover from
tape)
ontape -l
rollforward should start at log 6
another tape : N
(in log DR: in log failure recover from disk)

the secondary log files :
14:48:29 Event alarms enabled. ALARMPROG = '/usr/informix/etc/no_log.sh'
14:48:29 VP pid=41056 priority fixed at 65, former = 65
14:48:29 VP pid=39526 priority fixed at 65, former = 65
14:48:34 DR: DRAUTO is 0 (Off)
14:48:34 Informix Dynamic Server Version 7.31.UD2 Software Serial Number
AAD#A244485
14:48:34 Dynamically allocated new virtual shared memory segment (size
8192KB)
14:48:34 Informix Dynamic Server Initialized -- Shared Memory Initialized.
14:48:35 Dataskip is now OFF for all dbspaces
14:48:35 Restartable Restore has been DISABLED
14:48:35 Recovery Mode
14:48:37 Physical Restore of rootdbs started.

14:48:47 Checkpoint Completed: duration was 0 seconds.
14:48:47 Checkpoint loguniq 6, logpos 0x2b018

14:48:47 Physical Restore of rootdbs Completed.
14:48:47 Checkpoint Completed: duration was 0 seconds.
14:48:47 Checkpoint loguniq 6, logpos 0x2b018

14:48:47 Physical Restore of datadbs started.

14:49:17 Checkpoint Completed: duration was 0 seconds.
14:49:17 Checkpoint loguniq 6, logpos 0x2b018

14:49:17 Physical Restore of datadbs Completed.
14:49:17 Checkpoint Completed: duration was 0 seconds.
14:49:17 Checkpoint loguniq 6, logpos 0x2b018

14:55:53 DR: new type = secondary, primary server name = oebar
14:55:53 DR: Trying to connect to primary server ...
14:55:58 DR: Secondary server connected
14:55:59 DR: Start failure recovery from tape ...
14:56:35 Logical Recovery Started.
14:56:35 Start Logical Recovery - Start Log 6, End Log ?
14:56:35 Starting Log Position - 6 0x2b018
14:56:35 Clearing the physical and logical logs has started
14:57:28 Cleared 11 MB of the physical and logical logs in 53 seconds
14:57:29 Checkpoint Completed: duration was 1 seconds.



-----Original Message-----
From: nobody@ace.iiug.org [mailto:nobody@ace.iiug.org]
Sent: 27 June 2005 08:47
To: ids@iiug.org
Subject: HDR problem - ontape -p [5257]


1] When I do ontape -p , it does ask me "take logical backup [Y/N] ?"

What should I do ?
I gave "N" and proceeded with the cold restore.

Is the above right action ?

2] Why doesnt the restore complete ?

3] The level-0 backup on primary takes around 10 hours , should the restore
take more than that or how much time should the "ontape -p" run ?

4] When it does complete, whats should be the status of the informix server
i.e. "onstat - " should show what output ?

PLEASE give the answers pointwise .

Thanks in advance for ur help/suggestions ...

Regards,
Sagar

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<TITLE>RE: HDR problem - ontape -p [5257] </TITLE>
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<P><FONT SIZE=3D2>1] When I do ontape -p , it does ask me &quot;take =
logical backup [Y/N] ?&quot; </FONT>
<BR><FONT SIZE=3D2>&nbsp;&nbsp; What should I do ? </FONT>
</P>

<P><FONT SIZE=3D2>&nbsp;&nbsp; answer No.</FONT>
<BR><FONT SIZE=3D2>&nbsp;&nbsp; This means that your secondary server =
has been initialised and has some logs that are not been =
backuped.&nbsp; Your secondary server may be new, without a first =
initialisation. We do a complete restore, don't we ?&nbsp; </FONT></P>

<P><FONT SIZE=3D2>2] Why doesnt the restore complete ?&nbsp; Have you =
wait enough time ? do you see disk activity with iostat or something =
else ?</FONT></P>

<P><FONT SIZE=3D2>&nbsp; I have made 2 litte informixservers and =
constructs HDR between them. So i knew which behaviour and messages to =
expect.</FONT></P>

<P><FONT SIZE=3D2>3] The level-0 backup on primary takes around 10 =
hours , should the restore take more than that or how much time should =
the &quot;ontape -p&quot; run ?</FONT></P>

<P><FONT SIZE=3D2>Almost more, if both servers have the same hardware =
and same applications.&nbsp; My experience :the restore of the logs =
take a long, long time.</FONT></P>

<P><FONT SIZE=3D2>4] When it does complete, whats should be the status =
of the informix server i.e. &quot;onstat -&nbsp; &quot; should show =
what output ?</FONT>
</P>

<P><FONT SIZE=3D2>After completion the secondary server will always =
stays in Recovery Mode (Read Only).&nbsp; I'm not so sure from the =
&quot;Read Only&quot; in the banner. </FONT></P>
<BR>
<BR>

<P><FONT SIZE=3D2>I've tested HDR in informix7.3 as follows :</FONT>
</P>

<P><FONT SIZE=3D2>on primary : </FONT>
<BR><FONT SIZE=3D2>ontape -s -L 0</FONT>
<BR><FONT SIZE=3D2>onmode -d primary g_oebarrep&nbsp;&nbsp; # set as =
primary</FONT>
</P>

<P><FONT SIZE=3D2>on secondary :</FONT>
<BR><FONT SIZE=3D2>ontape -p&nbsp;&nbsp;&nbsp; (in log file : Recovery =
mode)</FONT>
<BR><FONT SIZE=3D2>onmode -d secondary g_oebar&nbsp;&nbsp;&nbsp; (in =
log : DR: Start failure recover from tape)</FONT>
<BR><FONT SIZE=3D2>ontape -l </FONT>
<BR><FONT SIZE=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rollforward =
should start at log 6</FONT>
<BR><FONT SIZE=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; another tape : =
N</FONT>
<BR><FONT =
SIZE=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp; (in log DR: in log failure recover from =
disk)</FONT>
</P>

<P><FONT SIZE=3D2>the secondary log files :</FONT>
<BR><FONT SIZE=3D2>14:48:29&nbsp; Event alarms enabled.&nbsp; ALARMPROG =
=3D '/usr/informix/etc/no_log.sh'</FONT>
<BR><FONT SIZE=3D2>14:48:29&nbsp; VP pid=3D41056 priority fixed at 65, =
former =3D 65</FONT>
<BR><FONT SIZE=3D2>14:48:29&nbsp; VP pid=3D39526 priority fixed at 65, =
former =3D 65</FONT>
<BR><FONT SIZE=3D2>14:48:34&nbsp; DR: DRAUTO is 0 (Off)</FONT>
<BR><FONT SIZE=3D2>14:48:34&nbsp; Informix Dynamic Server Version =
7.31.UD2&nbsp;&nbsp;&nbsp; Software Serial Number AAD#A244485</FONT>
<BR><FONT SIZE=3D2>14:48:34&nbsp; Dynamically allocated new virtual =
shared memory segment (size 8192KB)</FONT>
<BR><FONT SIZE=3D2>14:48:34&nbsp; Informix Dynamic Server Initialized =
-- Shared Memory Initialized.</FONT>
<BR><FONT SIZE=3D2>14:48:35&nbsp; Dataskip is now OFF for all =
dbspaces</FONT>
<BR><FONT SIZE=3D2>14:48:35&nbsp; Restartable Restore has been =
DISABLED</FONT>
<BR><FONT SIZE=3D2>14:48:35&nbsp; Recovery Mode</FONT>
<BR><FONT SIZE=3D2>14:48:37&nbsp; Physical Restore of rootdbs =
started.</FONT>
</P>

<P><FONT SIZE=3D2>14:48:47&nbsp; Checkpoint Completed:&nbsp; duration =
was 0 seconds.</FONT>
<BR><FONT SIZE=3D2>14:48:47&nbsp; Checkpoint loguniq 6, logpos 0x2b018</=
FONT>
</P>

<P><FONT SIZE=3D2>14:48:47&nbsp; Physical Restore of rootdbs =
Completed.</FONT>
<BR><FONT SIZE=3D2>14:48:47&nbsp; Checkpoint Completed:&nbsp; duration =
was 0 seconds.</FONT>
<BR><FONT SIZE=3D2>14:48:47&nbsp; Checkpoint loguniq 6, logpos =
0x2b018</FONT>
</P>

<P><FONT SIZE=3D2>14:48:47&nbsp; Physical Restore of datadbs =
started.</FONT>
</P>

<P><FONT SIZE=3D2>14:49:17&nbsp; Checkpoint Completed:&nbsp; duration =
was 0 seconds.</FONT>
<BR><FONT SIZE=3D2>14:49:17&nbsp; Checkpoint loguniq 6, logpos =
0x2b018</FONT>
</P>

<P><FONT SIZE=3D2>14:49:17&nbsp; Physical Restore of datadbs =
Completed.</FONT>
<BR><FONT SIZE=3D2>14:49:17&nbsp; Checkpoint Completed:&nbsp; duration =
was 0 seconds.</FONT>
<BR><FONT SIZE=3D2>14:49:17&nbsp; Checkpoint loguniq 6, logpos =
0x2b018</FONT>
</P>

<P><FONT SIZE=3D2>14:55:53&nbsp; DR: new type =3D secondary, primary =
server name =3D oebar </FONT>
<BR><FONT SIZE=3D2>14:55:53&nbsp; DR: Trying to connect to primary =
server ...</FONT>
<BR><FONT SIZE=3D2>14:55:58&nbsp; DR: Secondary server connected</FONT>
<BR><FONT SIZE=3D2>14:55:59&nbsp; DR: Start failure recovery from tape =
... </FONT>
<BR><FONT SIZE=3D2>14:56:35&nbsp; Logical Recovery Started.</FONT>
<BR><FONT SIZE=3D2>14:56:35&nbsp; Start Logical Recovery - Start Log 6, =
End Log ?</FONT>
<BR><FONT SIZE=3D2>14:56:35&nbsp; Starting Log Position - 6 =
0x2b018</FONT>
<BR><FONT SIZE=3D2>14:56:35&nbsp; Clearing the physical and logical =
logs has started</FONT>
<BR><FONT SIZE=3D2>14:57:28&nbsp; Cleared 11 MB of the physical and =
logical logs in 53 seconds</FONT>
<BR><FONT SIZE=3D2>14:57:29&nbsp; Checkpoint Completed:&nbsp; duration =
was 1 seconds.</FONT>
</P>

<P><FONT SIZE=3D2>&nbsp;</FONT>
</P>

<P><FONT SIZE=3D2>-----Original Message-----</FONT>
<BR><FONT SIZE=3D2>From: nobody@ace.iiug.org [<A =
HREF=3D"mailto:nobody@ace.iiug.org">mailto:nobody@ace.iiug.org</A>] =
</FONT>
<BR><FONT SIZE=3D2>Sent: 27 June 2005 08:47</FONT>
<BR><FONT SIZE=3D2>To: ids@iiug.org</FONT>
<BR><FONT SIZE=3D2>Subject: HDR problem - ontape -p [5257] </FONT>
</P>
<BR>

<P><FONT SIZE=3D2>1] When I do ontape -p , it does ask me &quot;take =
logical backup [Y/N] ?&quot; </FONT>
</P>

<P><FONT SIZE=3D2>&nbsp;&nbsp; What should I do ? </FONT>
<BR><FONT =
SIZE=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp; I gave &quot;N&quot; and proceeded with the cold =
restore.</FONT>
</P>

<P><FONT SIZE=3D2>&nbsp;&nbsp; Is the above right action ?</FONT>
</P>

<P><FONT SIZE=3D2>2] Why doesnt the restore complete ?</FONT>
</P>

<P><FONT SIZE=3D2>3] The level-0 backup on primary takes around 10 =
hours , should the restore take more than that or how much time should =
the &quot;ontape -p&quot; run ?</FONT></P>

<P><FONT SIZE=3D2>4] When it does complete, whats should be the status =
of the informix server i.e. &quot;onstat -&nbsp; &quot; should show =
what output ?</FONT>
</P>

<P><FONT SIZE=3D2>PLEASE give the answers pointwise .</FONT>
</P>

<P><FONT SIZE=3D2>Thanks in&nbsp; advance for ur help/suggestions =
...</FONT>
</P>

<P><FONT SIZE=3D2>Regards,</FONT>
<BR><FONT SIZE=3D2>Sagar</FONT>
</P>

</BODY>
</HTML>
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