Re: [ECOS] jffs2 write in 4kB blocks over the network?

[Gary Thomas <gary@mlbassoc.com>]

Markus Schaber wrote:
> Hi, Gary,
> 
> Gary Thomas <gary@mlbassoc.com> wrote:
> 
>> Markus Schaber wrote:
>>>> the default block size in jffs2 is 4kB. But with FTP, packets have at 
>>>> most 1448 B payload.
>>>> If I put a file of 12kB, is the file then put in 3 nodes if 4kB, or is 
>>>> it put in 9 nodes (because FTP uses 9 packets) ?
>>> Besides what Jürgen wrote, it also depends on how your FTP program
>>> buffers, which parts it writes in a single write call, and when it
>>> syncs/flushes buffers.
>> It still doesn't matter because the file system and/or JFFS2 will
>> be buffering it to suit their needs.
> 
> Do you really say that JFFS2 on eCos ignores calls to fflush() & co?
> 
> So then it is unusable for every application that needs transactional
> consistency.

I'm sure that this is not the case - the FLASH should be consistent
after a flush.

Tha5 said, this discussion should really be on the JFFS2 mailing
list, since they'll be able to better answer the questions
and concerns.  Try taking it to linux-mtd@lists.infradead.org

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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