[LON-CAPA-admin] Regular Server Restarts

[Stuart Raeburn]

Lee,

For the LON-CAPA domains I manage, I find that I typically need to  
restart my LON-CAPA VMs about once a month because of kernel security  
updates for the Linux distros I use.  The individual VMs restart very  
rapidly as compared with the time needed for the host itself to  
restart when I reboot that.

I typically restart the VMs between 5.30 am and 6.30 am so users are  
not impacted, but I avoid taking the MSU LON-CAPA library instance  
offline around 5.10 am and 6.10 am local time, as it is one of the  
authoritative "DNS servers" in the LON-CAPA network contacted daily by  
other servers to retrieve information about cluster membership when  
/home/httpd/perl/loncron runs.

> If we are shutting down apache and lon-capa anyway, we are also   
> considering clearing the temporary files on the access servers.

Which temporary files are you considering clearing?

Stuart Raeburn
LON-CAPA Academic Consortium

Quoting "Bynum, Lee Hamilton" <leebynum at illinois.edu>:

> Hello Everyone,
>
> We are discussing implementing a cron job that will restart our   
> lon-capa servers every so often in order to flush out any issues   
> that pop up over time.  How often do other domains do this, if at   
> all?  Is this a reasonable idea or crazy?
>
> If we are shutting down apache and lon-capa anyway, we are also   
> considering clearing the temporary files on the access servers.    
> What are your thoughts on that?
>
> Thanks,
>
> Lee
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