[PC-BSD Dev] Wild idea to speed up boot process

Fabrizio Parrella fabrizio at bibivu.com
Sat Aug 10 07:37:51 PDT 2013


Oh... My signature ? Ok.  I'll try to remember to remove it when
sending from phone.

Fabry

On Aug 10, 2013, at 9:44, Lars Engels <lars.engels at 0x20.net> wrote:

>
>
> Fabrizio Parrella <fabrizio at bibivu.com> schrieb:
>> Spam ?? Where ??
>>
>> Sent from Fabry's iPhone
>> (note: all responses from this device might be addressed w/ one line
>> sentences and may be in shorthand format.)
>>
>> On Aug 10, 2013, at 9:30, "Radio młodych bandytów"
>> <radiomlodychbandytow at o2.pl> wrote:
>>
>>> P.S.
>>> If you want help, be respectful enough to not include spam in your
>> messages.
>>> --
>>> Twoje radio
>>>
>>> On 10/08/2013 14:28, Fabrizio Parrella wrote:
>>>> If you do it at shut down then we need to add something that checks
>> at
>>>> boot if it is still valid as MANY of my users like to just press the
>>>> power button until the computer shuts off (lots of FSCK each day....
>>>> On a side note, what is the FSCK for ZFS ? I had a computer that
>> needs
>>>> it with the beta version installed as it is not starting anymore)
>>>>
>>>>
>>>> Sent from Fabry's iPhone
>>>> (note: all responses from this device might be addressed w/ one line
>>>> sentences and may be in shorthand format.)
>>>>
>>>> On Aug 10, 2013, at 5:21, Luca Ferrari <fluca1978 at infinito.it>
>> wrote:
>>>>
>>>>> On Fri, Aug 9, 2013 at 8:00 PM, Claudio L. <claudio at hpgcc3.org>
>> wrote:
>>>>>
>>>>>> Once it's in RAM, any file that exists in this ram disk would be
>> used
>>>>>> instead of the underlying root file system.
>>>>>>
>>>>>> On system shutdown, or actually as soon as boot process is
>> finished, this
>>>>>> ramdisk can be dumped back to disk, to preserve any changes.
>>>>>>
>>>>>> All we would need is some hook to detect which files are read
>> during boot,
>>>>>> and copy them to the ram disk on the fly if they are not already
>> there.
>>>>>
>>>>>
>>>>> Uhm...sounds to me like a duplicate of the vnode cache layer: each
>>>>> time access to a file is detected you have to map it to the
>> ramdisk,
>>>>> and then the system maps it into the vnode cache. I don't know if
>> this
>>>>> will produce a real gain considering the complexity it adds.
>>>>> Something that could work better, in my opinion, is an autonomous
>>>>> system able to "adjust" a ramdisk each time the system powers off
>> so
>>>>> that the next time it boots the ramdisk would be still valid
>>>>> considering any changes the user has done in the system itself
>> (e.g.,
>>>>> configuration files).
>>>>>
>>>>> Luca
>>>>> _______________________________________________
>>>>> Dev mailing list
>>>>> Dev at lists.pcbsd.org
>>>>> http://lists.pcbsd.org/mailman/listinfo/dev
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>
> There:
>
>
> Sent from Fabry's iPhone
> (note: all responses from this device might be addressed w/ one line
> sentences and may be in shorthand format.)
>


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