[DRBD-user] difference in speed when using external metadata

Bart Coninckx bart.coninckx at telenet.be
Mon Jan 10 14:57:00 CET 2011

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


On Monday 10 January 2011 14:39:53 Felix Frank wrote:
> On 01/09/2011 05:03 PM, Bart Coninckx wrote:
> > Hi all,
> > 
> > am reading the Novell docs on DRBD and one of the ways they mention to
> > speed up DRBD is using external metadata. Possibly a hard question to
> > answer but could someone indicate by what degree this would enhance
> > speed (provided using a sufficient fast disk for the metadata, like a
> > SSD)?
> 
> Hi,
> 
> I'd believe that the greater part of the benefit stems from having
> seperate physical devices write data vs. metadata. Think of all the
> seeks necessary to flush the activity log all the time.
> 
> Being such, I'd also expect SSD to suffer no penalty from internal
> metadata. But I'd be happy to stand corrected.
> 
> Cheers,
> Felix

Hi,

I don't mean the actual DRBD would be on SSD (way too expensive), but just the 
metadata.


thx,

B.



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