Subject: Re: msdosfs performance problem
To: None <firstname.lastname@example.org>
From: Christos Zoulas <email@example.com>
Date: 11/28/2005 00:24:06
In article <Pine.BSF.firstname.lastname@example.org>,
Matthew Orgass <email@example.com> wrote:
>On 2005-11-27 firstname.lastname@example.org wrote:
>> email@example.com (Matthew Orgass) writes:
>> > msdosfs does all writes fully synchronously (why, I can't say).
>> As I understand it meta data writes are synchronous but
>> can be asynchronous if you mount -o async. Data writes
>> are done by UBC and are asynchronous.
> You are right, it isn't fully synchronous. I should have tested it more
>(checking directly now does show serious performance loss with -o sync).
>However it doesn't seem to behave quite like normal ffs in that all data
>will be flushed before the writing command completes, and dd seems to show
>accurate times early in the transfer.
And performance degrades dramatically as the file size increases.