[sclug] Mirror disks across machines like distributed RAID?

Keith Edmunds kae at midnighthax.com
Tue Jan 5 18:42:35 UTC 2010

On Tue, 05 Jan 2010 16:49:16 +0000, tom at randominter.net said:

> Anyone else got any other experiences with high availability disk 
> solutions either at home or in work?

Yes, we've rolled out DRBD a few times. We use it in an HA cluster
configuration and seems to work very well.

On Tue, 5 Jan 2010 17:04:01 +0000, dickon-ml at fluff.org said:

> I have had at work, and my conclusion is this: in all cases I've ever
> seen, don't bother. Do it at the application layer instead: you'll save
> yourself a hell of a headache, and a bundle of cash.

You seem to be very against DRBD but without stating any real reason. In
the case, for example, of an HA web server, putting the websites on a DRBD
device seems straightforward and reliable. How would you propose doing
that in the application layer (and saving the aforesaid bundle)?

Keith Edmunds

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