[DRBD-user] Better performance with meta-data at the beginning of the device?

paddy paddy at panici.net
Wed Sep 13 19:14:13 CEST 2006

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

On Wed, Sep 13, 2006 at 01:05:16PM -0400, Diego Julian Remolina wrote:
> >>This does not seem to make sense; the inner tracks have lower performance 
> >>because the linear speed is slower there and the amount of data you can 
> >>store is less. 
> >
> >
> >what about seeks ?
> And to make things even harder to figure out, how about the effect of NCQ 
> on seeks and performance?
> I guess there are way too many factors to know for sure other than 
> performing benchmarks. 


or just buy more drives ;-) ...

> Personally, I have two servers with 12 Drives in raid 10 using the ARECA 
> ARC-1160 raid controllers. Running benchmarks with drbd on those servers I 
> found the bottleneck to be the Gigabit card. Bonnie maxed out at ~120MB/s 
> using drbd while I got ~230MB/s without drbd (no need to channel bond, I am 
> happy with 120MB/s writes), so even having the metadata at the end of the 
> disk does not matter that much on my systems. 

Perl 6 will give you the big knob. -- Larry Wall

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