#3032 NORM Untriag: JFFS2 performance on content bundles.

[Zarro Boogs per Child]

#3032: JFFS2 performance on content bundles.
---------------------+------------------------------------------------------
  Reporter:  dwmw2   |       Owner:  dwmw2    
      Type:  defect  |      Status:  assigned 
  Priority:  normal  |   Milestone:  Untriaged
 Component:  kernel  |     Version:           
Resolution:          |    Keywords:           
  Verified:  0       |  
---------------------+------------------------------------------------------
Old description:

> We need to study JFFS2 and overall system performance for content
> bundles.
>
> Some questions are: should we have large files with lots of content, or
> multiple small files (which depends on performance of large directories
> vs. performance of large files). Should we compress the whole file and
> implement the chattr ioctl interface we've spoken about for so long to
> tell JFFS2 not to bother? etc.
>
> We need to fix whatever performance issues exist, and give coherent
> guidelines to those providing content.
>
> Some samples of potential content are at...
>
> http://arael.shtooka.net/bundles/01mb.html
>
> http://arael.shtooka.net/bundles/abridged_wikipedia/
>
> http://arael.shtooka.net/olpc/abridged_wikipedia.xol
>
> http://arael.shtooka.net/fi/html/1mb.html
>
> http://arael.shtooka.net/bundles/featured_pictures/
>
> [02:17] <Arael5> I could stuff a lot more content into XO if I could use
> file.html.gz and iso image for storing thousands of
> small files.
> [02:17] <Arael5> I have tried to open 250kB html file on XO and it took
> 30 seconds to open it on build 406.
> [02:17] <Arael5> 100kB html file loaded in 7 seconds.
>
> [02:23] <Arael5> The 1mb file is here
> http://arael.shtooka.net/fi/html/1mb.html
> [02:24] <Arael5> If XO could open it in less than 10 seconds I will not
> have to use many small files in my bundles.
>

> http://arael.shtooka.net/olpc/abridged_wikipedia.xol
> http://arael.shtooka.net/fi/html/1mb.html
> http://arael.shtooka.net/bundles/featured_pictures/

New description:

 We need to study JFFS2 and overall system performance for content bundles.

 Some questions are: should we have large files with lots of content, or
 multiple small files (which depends on performance of large directories
 vs. performance of large files). Should we compress the whole file and
 implement the chattr ioctl interface we've spoken about for so long to
 tell JFFS2 not to bother? etc.

 We need to fix whatever performance issues exist, and give coherent
 guidelines to those providing content.

 Some samples of potential content are at...

 http://arael.shtooka.net/bundles/01mb.html

 http://arael.shtooka.net/bundles/abridged_wikipedia/

 http://arael.shtooka.net/olpc/abridged_wikipedia.xol

 http://arael.shtooka.net/fi/html/1mb.html

 http://arael.shtooka.net/bundles/featured_pictures/

 [02:17] <Arael5> I could stuff a lot more content into XO if I could use
 file.html.gz and iso image for storing thousands of
 small files.

 [02:17] <Arael5> I have tried to open 250kB html file on XO and it took 30
 seconds to open it on build 406.

 [02:17] <Arael5> 100kB html file loaded in 7 seconds.

 [02:23] <Arael5> The 1mb file is here
 http://arael.shtooka.net/fi/html/1mb.html

 [02:24] <Arael5> If XO could open it in less than 10 seconds I will not
 have to use many small files in my bundles.


 http://arael.shtooka.net/olpc/abridged_wikipedia.xol

 http://arael.shtooka.net/fi/html/1mb.html

 http://arael.shtooka.net/bundles/featured_pictures/

-- 
Ticket URL: <http://dev.laptop.org/ticket/3032#comment:2>
One Laptop Per Child <http://laptop.org/>