"The MySQL site claims that their clusters give "high availability" aka
"5 nines". Looking more closely, "5 nines" means 99.999% up time.
Sounds good. 0.001% of a week is 10 minutes."

Ouch. That means WITH a cluster, every six weeks the DBA needs to spend
an hour fixing something. Or it means they need a restart and basic
maintenance every week.
Sounds right, with a very light load we have to reboot MySQL on RedHat
8.0 about every six weeks. Hence the port to Firebird. That, and
views. And data constraints. And subselects. And...

-----Original Message-----
From: Ann W. Harrison [mailto:aharrison@...]
Sent: Friday, July 30, 2004 5:46 PM
To: firebird-support@yahoogroups.com; firebird-support@yahoogroups.com
Subject: Re: [firebird-support] Down time

At 05:03 PM 7/30/2004, Lester Caine wrote:

>Ann W. Harrison wrote:
>
> > Just out of curiosity, how many of you experience more than
> > 10 minutes a week of non-scheduled down time in your Firebird
> > applications?
>
>Whats down time :)

The reason for my question is MySQL's "cluster" support.
My reading of it is that their "clusters" have nothing to
do with what used to be called clusters - groups of
machines that share disk but not memory. The MySQL site
claims that their clusters give "high availability" aka
"5 nines". Looking more closely, "5 nines" means 99.999%
up time. Sounds good. 0.001% of a week is 10 minutes.


Regards,


Ann





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