Re: High Availability -- True 7x24x365

  • From: Tanel Põder <tanel.poder.003@xxxxxxx>
  • To: "ORACLE-L" <oracle-l@xxxxxxxxxxxxx>
  • Date: Thu, 7 Jul 2005 15:02:15 +0100

Hi,

Well, if we speak about true high availability (close to 100% stuff), everything from power supply up to user itself has to be involved. For example TP monitors multiplexing all transactions to different databases, or even the client program sending transactions to multiple locations and not returning before all database have committed the transaction. But this has do be considered from IS strategic planning stage and it is very expensive - usually the companies with definite need for 99.99999% availability will reduce their requirement to 99.5% or even lower, after seeing the cost and effort required for having a true high-availability system.

Tanel.

----- Original Message ----- From: "Goulet, Dick" <DGoulet@xxxxxxxx>
To: <regdba@xxxxxxxxx>; "Oracle-l" <oracle-l@xxxxxxxxxxxxx>
Sent: Thursday, July 07, 2005 2:48 PM
Subject: RE: High Availability -- True 7x24x365


Pete,

We're close to your wants, mainly by accident.  We purchased
reliable servers (HP 9000) and good disk subsystems (EMC Symmetric), a
good battery backup UPS with a fast start generator.  With that we've
got 90% uptime with no unscheduled down time.  Scheduled downtime is
still a need.  We're looking into RAC with 10g to give us the remaining
10% but I'm skeptical.

-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Peter Barnett
Sent: Thursday, July 07, 2005 9:35 AM
To: Oracle-l
Subject: High Availability -- True 7x24x365

We have finally moved into the modern digital world.
Outages of our company web site are being noticed by
our customers which is causing management to ask about
maintaining 7x24x365 up time.

There are several ideas being circulated but I was
wondering how others are doing it?

The requirement is true 7x24x365.  Patches, upgrades,
maintenance need to be transparent to the users of our
web sites.





Pete Barnett
Lead Database Administrator
The Regence Group
pnbarne@xxxxxxxxxxx

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