Re: tail policy question

[Hans Reiser <reiser@namesys.com>]

Zhihui Zhang wrote:

>Hi,
>
>I spent a little time on Reiser4 tail code and was surprised to find out
>that the default policy given in reiser4.h is ALWAYS_TAIL_ID not
>DEFAULT_TAIL_ID.
>
>/* default tail policy plugin */
>#define REISER4_TAIL_PLUGIN       (ALWAYS_TAIL_ID)
>
>Does this mean Reiser4 always use tails no matter how large a file is by
>default?  I must be wrong somewhere.
>  
>
Umh,  we are often capable of incredible stupidity as a result of 
someone testing some setting and then checking it in by accident.  You 
want the default not the always.

>Anyway, when tails are in use, will they incur more or less performance
>penalty on files using them when compared to ReiserFS V3 (remember that
>-notail mount option is sometimes preferred)? 
>
It is not nearly that bad, but you want the default.

I'll let Saveliev comment further.   Thanks for finding this.


-- 
Hans