Re: Database Outages - Best Practices
- From: stephen booth <stephenbooth.uk@xxxxxxxxx>
- To: ryan_gaffuri@xxxxxxxxxxx
- Date: Mon, 14 Feb 2005 21:16:17 +0000
On Mon, 14 Feb 2005 20:38:11 +0000, ryan_gaffuri@xxxxxxxxxxx
<ryan_gaffuri@xxxxxxxxxxx> wrote:
> most outages are typically related to builds. your adding tables, dropping
> tables, data migration, or the application is deploying a new version.
> standard is outside of regular business hours. negotiate notice in advance.
> Negotiated frequency. Negotiated downtime. Negotiated notification process if
> there is a delay in bringing the system back up.
>
> you want it all written down in advance, with appropriate phone numbers and
> you want a client signature.
Ditto on all of the above.
One useful way I've found of getting management to agree outages is to
not call them outages. Call them 'Power Possession'. A power
possession is a period when you or any of the other techs and
engineers associated with a system (database, OS, hardware, network,
power, building management &c) have the option or downing the system,
the datacentre or even the network for maintenence.
Schedule them well inadvance (try for a year), as frequently as
possible, for times time the system isn't busy and for a good long
period of time. Most times you won't need them and will be able to
tell the business "It's OK, we don't need to take the service down,
this time". When work needs to be done try to get as much
non-interfering work into that window as possible (obviously don't try
to upgrade the OS and database software at the same time but you
should be OK working on the database whilst a network switch is being
upgraded or after a test firing of the backup generators (always make
sure that your backup generators are test fired on the manufacturers
reccommended schedule, this is the voice of bitter experience
speaking), for example).
Stephen
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