Regarding UBI scalability

[Amit Kumar Sharma]

Hi
----- Original Message ----- 
From: "Artem Bityutskiy" <dedekind at infradead.org>
To: <brij.singh at samsung.com>
Cc: <linux-mtd at lists.infradead.org>
Sent: Monday, February 02, 2009 3:01 PM
Subject: Re: Regarding UBI scalability


> On Fri, 2009-01-30 at 12:45 +0000, BRIJESH SINGH wrote:
>> Hi,
>>     I have gone through UBI documentation which clearly 
>> mentions that
>> UBI doesn't scale very well.(Boot time and Memory 
>> consumption
>> increases with size of device.)This is very similar to 
>> JFFS2
>> scalability issues. Log, journal(like UBIFS LPT) 
>> combination might
>> surely help on this issue.
>
> Right
>
>>   I would like to work on this enhancement with the 
>> community. Before
>> that I just wanted to check if any one is already working 
>> on it.
>
> No, I do not think so.
>
>>   As this a well known issue, I am sure somebody will 
>> have some design
>> suggestions. Any design suggestions will be appreciated.
>
> You could look at the old JFFS3 design document:
>
> http://www.linux-mtd.infradead.org/doc/JFFS3design.pdf
>
> at the "The superblock" section, which describes the idea 
> of how to have
> a data structure which refers everything else in the 
> media: journal,
> root nodes of the trees, etc.
>
> An then you should think about how to store the EBA table 
> on flash. And
> how to store the erase counters on the flash. Many ideas 
> may be borrowed
> from UBIFS in this area.
>
> I may help you in terms of design suggestions / review, 
> and some code
> review. But I do not really have time to seriously work on 
> this.
>
> -- 
> Best regards,
> Artem Bityutskiy (???????? ?????)

Thanks for your comments Brijesh will check all your 
suggestion and we will discuss final design with you for 
your comments.

Thanks
Amit
>
>
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