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

Josh Smith joshms at pcbsd.org
Sat Aug 10 08:47:15 PDT 2013


Your signature doesn't bother me, but I can't speak for everyone.  Seems like a rather small detail to me.  Lets try to stay on topic though.

Best regards, 

Josh

Sent from my iPhone

On Aug 10, 2013, at 10:37 AM, Fabrizio Parrella <fabrizio at bibivu.com> wrote:

> 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
>>>>> _______________________________________________
>>>>> Dev mailing list
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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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