Hi Jan,

 

Unfortunately, no crashdump was generated from either host freezing event..

 

Regards,

 

Angelo.

 

 

From: Jan Paul [mailto:[email protected]] 
Sent: Friday, 04 August 2017 14:24
To: [email protected]
Subject: Re: [smartos-discuss] Best practice for SmartOS build selection..

 

Hi Angelo,

 

Taking a step aside from your questions,

 

have you managed to gather crashdump for analysis? Usually generating NMI is 
the way to go in this sort of hang situation,

and per my check of /etc/system smartos kernel is configured to panic on 
sending NMI.

 

If we had one we could try to take a look at where was your machine frozen,

 

cheers,

 

-Jan

 

On 4 Aug 2017, at 13:44, Dr. Angelo Roussos <[email protected] 
<mailto:[email protected]> > wrote:

 

Hi All,

 

In the last week or so, we have had two host ‘freezes’ – both hosts running 
image SmartOS 20160330T234717Z, and running fine (up until this point) for well 
over a year.

 

Both host servers required a power down and power up, and have been bought up 
using the following image – 20161013T025521Z - purely because all our other 
hosts are running this image and we haven’t tested anything more recent than 
that in our environment.

 

My questions are:

 

1.      What is considered best practice in respect of which image build to put 
onto operational hosts?
2.      If the response (as I expect) is for the most recent released build, 
what is considered a ‘reasonable’ time frame to wait after a build is released 
until it is considered operationally stable?
3.      What ‘testing’ procedures (if any) are considered best practice before 
a ‘stable’ build is deployed in an operational environment?
4.      How frequently does it make sense to boot hosts into a ‘current’ build 
or do you leave hosts running older builds until they either require a reboot 
(for whatever reason), or hosts are end-of-life’d?

 

Thanks and regards,

 

Angelo.

 

 


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