I really appreciate your concerns on new thread but I thought my queries would be in harmony of previous questions.
Nonetheless, what happens on critical production servers like high frequency trading server where you are getting live and critical data. Sometimes, data itself is corrupted and causing some issues in processing corrupted data or some corner cases that might not encountered during development.
In this case, there should be some techniques to debug on production server with the live feeds with some kind of hook to the main process.
Is there any specific debugging tool or techniques available to debug highly critical production server, where data might be corrupted or OS is behaving crazy?
Lets consider the scenario, where the back up server is not present in infrastructure of the business process.
Thanks,
Dev Null
On Fri, Dec 3, 2010 at 7:28 PM, Mulyadi Santosa <mulyadi.santosa@xxxxxxxxx> wrote:
Hi
On Sat, Dec 4, 2010 at 05:19, Dev Null <devnullfin@xxxxxxxxx> wrote:
> Hello,
BTW, is it your daily behaviour to hijack someones' else message
thread? Is it hard for you to press "Compose Mail" button and start
fresh new thread by your own?
Do you have the debuginfo or debug symbol of those modules? Then maybe
> How to debug the running kernel module on any production server?
you can use SystemTap....
First of all, you have to ask to yourself "why can I found it earlier
> In general, what are the debugging techniques of any running production
> server?
on the development server?" lack of stress test? lack of test cases?
Secondly, suppose it is a newly found bug...likely a corner case
bug..... Then before you debug it, if I were you, I will activate
(read: make it the master production) backup server first. Update it
with latest data from current master production. Hopefully ...and it's
a must nowadays I guess...you already prepare somekind of High
Availability setup between those servers.
And then? Same like you debug your casual user space programs. So I
ask you back, how do you usually do that such job?
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
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