Re: [RFC] periodic self-tests on short-uptime machines

Lukasz Stelmach <[email protected]> Tue, 11 Nov 2014 21:23:54 +0100
Newsgroups	gmane.linux.utilities.smartmontools
Message-ID	<[email protected]>
On 09.11.2014 19:29, Christian Franke wrote:
> Lukasz Stelmach wrote:
>>
>> The way `-s' directive in smartd.conf works is good for long-running
>> machines but somewhat inappropriate for desktops or laptops which may be
>> turned on and off and suspended quite often. This is the very same issue
>> that lead to development of special scripts that run daily (weekly,
>> monthly) cron jobs and save timestamps across reboots.
> 
> Try -s PREFIX command line option to enable state persistence. Then
> tests "forgotten" during downtime will be started after second(!) device
> polling. See section starting with "If the scheduled tests are used in
> conjunction with state persistence ..." on smartd.conf man page.

I see, nice.

How about using the state persistence instead of self-test logs to keep
track of power-on-hours and to run once-N-hours tests. Take for example
such schedule (suppose the machine is working 24/7 for a moment):

* run a short test every 24 power-on-hours

* run a long test every 168 power-on-hours (a week)

For a machine without 100% duty cycle there should also be maximum spans
between tests (something like forcing fsck after some span of real-time):

* run a short test if the last time it was ran is longer than 672
real-time-hours (4 weeks) ago,

* force running a long test after 2016 real-time-hours (3 months).

If nothing else such mode of scheduling seems to me more relevant for
machines that don't work all the time and more intuitive for (me) their
operators to set up.

BTW. Do self-tests impair performance. Is it important to schedule them
when the least load on a server is expected?

Kind regards,
-- 
Było mi bardzo miło.                   Twoje oczy lubią mnie
>Łukasz<                                     i to mnie zgubi  (c)SNL

REKLAMA: http://ars-fabrica.eu/ sklep z rękodziełem

------------------------------------------------------------------------------
Comprehensive Server Monitoring with Site24x7.
Monitor 10 servers for $9/Month.
Get alerted through email, SMS, voice calls or mobile push notifications.
Take corrective actions from your mobile device.
http://pubads.g.doubleclick.net/gampad/clk?id=154624111&iu=/4140/ostg.clktrk

_______________________________________________
Smartmontools-support mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/smartmontools-support
signature.asc (application/pgp-signature, 538 B)