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14 June 07 - Resellernews - IBM: Informix database alive and kicking... Read
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12 June 07 - IBM - IDS 11 release announcement (pdf)... Read
12 June 07 - ChannelWeb Network - IBM Uncages IDS 11, Aka Cheetah, Database... Read
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IDS Forum

Re: HDR (crash recovery)

Posted By: Madison Pruet
Date: Thursday, 2 July 2009, at 10:39 a.m.

In Response To: HDR (crash recovery) (KAMRAN HAQ)

It sounds like 1) you might be using buffered logging, 2) You are runni=
ng
HDR in ASYNC mode, and/or 3) that you restarted the secondary by runni=
ng
oninit -PHY.

Are any of these the case?

=

"KAMRAN HAQ" =

<khaq@i2cinc.com> =

Sent by: =
To

ids-bounces@iiug. ids@iiug.org =

org =
cc

=

Subj=
ect

07/02/2009 08:11 HDR (crash recovery) [16215] =

AM =

=

=

Please respond to =

ids@iiug.org =

=

=

Hi,
We conducted a test to see the business impact if primary server crashe=
s in
an
HDR.
We inserted 200 independant inserts in a table. And killed the informix=

instance session (got from "onstat -g glo" command).
Here are our findings:
After crash of primary server the table on secondary node was containin=
192

rows (out of 200).
We restarted the secondary server, Now the count reduces to 100.
Then we shutdown the secondary server (onmode -sky), and initialized th=
e
primary server(oninit).
Now the primary node showing all 200 rows.
Then we initialized the secondary server as well, the number of rows(in=

that
table) increased to 200 on secondary server also.
Our questions are:
1- Why 192 rows on secondary server reduced after restart.
2- Why there is difference between commited transactions at primary ser=
ver
and
secondary server after crash of primary server.
regards,
Kamran

***********************************************************************=
********

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