[sclug] Mirror disks across machines like distributed RAID?

Tom Carbert-Allen tom at randominter.net
Wed Jan 6 16:52:40 UTC 2010

On 06/01/2010 4:18, Dickon Hood wrote:
> HA webservers can usually be managed happily with the usual tricks:
> clusters of machines, load balancers (if you insist), HSRP-alike failover,
> virtual IP addresses and whatnot.  Or you can simply do what the BBC has
> done for many years, and have a five-minute TTL on the DNS and ifconfig an
> alias on another machine should one of the farm go down.  This sort of
> thing isn't rocket science.
I am very surprised the BBC are using such a manual technique to keep 
there site online, especially as you seem to suggest a human is logging 
in and performing this operation. Then again there site is static, 
doesn't require transactions or a users session to stay open 
transparently during a fail over, so simple old technology would be 
enough for them. Maybe they aren't as hi tech as they would have us believe.


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