[CentOS] How to stagger fsck executions

[Valeri Galtsev]

On Tue, April 21, 2015 2:13 pm, Hugh E Cruickshank wrote:
> From: Gordon Messmer Sent: April 21, 2015 10:30
>>
>> On 04/21/2015 09:40 AM, Hugh E Cruickshank wrote:
>> > I accept that fscks are required on a periodic basis and I
>> am willing
>> > to reboot more often to achieve these but I would like to minimize
>> > downtime (during the reboot) where possible.
>>
>> Why do you accept that?
>
> Every article I have read on the subject has recommended this a good
> practice.
>
>> The default behavior for filesystems set up by Red Hat tools
>> (anaconda) is not to fsck.  Not by mount count, nor by
>> time.  The default behavior for e2fsprogs was changed to disable
>> periodic fsck in Feb 2011.  CentOS 6 includes a version of e2fsprogs
>> from before that change, but the filesystem is considered
>> very stable,
>> and the periodic fsck is not generally considered necessary.
>
> I have confirmed that filesystems setup by anaconda on both CentOS 6
> and RHEL 6 have both boot count and interval disabled however they
> are not disabled for any manually created filesystems (they are set
> to 24 and 6 months, respectively).
>
> I find it interesting that as late as 2014 Red Hat is recommending:
>
> . If automatic filesystem checks are inconvenient, then it is
>   recommended to disable the automated filesystem check as discussed
>   in the following article:
>
>   How to turn off forced/automatic fsck in Red Hat Enterprise Linux?
>
> . Once disabled, it is recommended to schedule regular "human
>   controlled/monitored" filsystem checks, when it is convenient to
>   do so. These checks should not be ignored, or scheduled too far
>   apart.

Thus converting "Enterprise" into more or less home user system - for user
with plenty of time to spare for manual system maintenance... ;-(

Valeri

>
> This is from https://access.redhat.com/solutions/70531
>
> Regards, Hugh
>
> --
> Hugh E Cruickshank, Forward Software, www.forward-software.com
>
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++++++++++++++++++++++++++++++++++++++++
Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247
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