[DRBD-user] DRBD write throughput very very bad

Tobias Appel tappel at eso.org
Fri Apr 24 11:01:00 CEST 2009

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


Lars Ellenberg wrote:

> the users guide is always for the current release of DRBD,
> which is 8.3.1 at the time of writing this email.
> 
> the "wo:" thing is only available in 8.3 (since 8.2.something) it was
> introduced when the barrier method has been introduced, at the same time
> as the explicit "drain" and "none" methods have been introduced.
> 
> drbd 8.0 has only the concept of drain,
> and since 8.0.9 the "flush" concept.
> in 8.0 you can only disable the "flush",
> which means you get "drain".
> 
> the documentation is correct, though maybe misleading.
> drain was the only concept implemented before 8.0.9.
> that does not mean all other methods have been introduced with 8.0.9.
> e.g. options to disable the flush method again have only been
> introduced with 8.0.12.  (as written in the changelog)
> 

Thanks for the clarification. I will try to upgrade then to 8.3.1. Wish 
me luck!



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