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  3. November 2013

Re: Back ups with High Availability Web Server

Because that's the simple way to guarantee a consistent backup without
regard to the applications running on the server.

As with VSS, SWA has some application participation requirements. Without
application participation, the most you can hope for is "crash-consistent"
backups, to use the VSS term. That may be good enough for Windows users
and MS certainly doesn't mind saying "use at your own risk".

But IBM prefers to play it safe with your systems. Thus the simple "save
entire system".

If you can't afford the downtime for simple and easy, then you go for
medium or complex backup plans which use SWA.

Charles




On Wed, Nov 13, 2013 at 9:43 AM, Matt Olson <Matt.Olson@xxxxxxxx> wrote:

Why is it then that GO SAVE, option 21 ends all subsystems? That is
definitely not save while active.



-----Original Message-----
From: Charles Wilt [mailto:charles.wilt@xxxxxxxxx]
Sent: Tuesday, November 12, 2013 7:04 PM
To: Midrange Systems Technical Discussion
Subject: Re: Back ups with High Availability Web Server

I don't see much difference between VSS and IBM i's Save While Active...

Except that SWA has been available since at least 1997 or 1996...probably
longer.

The problem is too many shops don't bother to use it.

Charles


On Tue, Nov 12, 2013 at 4:25 PM, Matt Olson <Matt.Olson@xxxxxxxx> wrote:

First question is have you ever restored one of these? How does the
operating system come up when you do that?

Yes, comes up in recovery mode the first bootup, subsequent bootups
are normal.

Second is what are you doing with those servers? Are these hosting
large Oracle or MSSQL Databases or are they file and print servers? Or
are they just AD members that are used for remote desktop for example.

100GB database servers, print servers, file servers, web servers, you
name it. Everything in windows these days have volume shadow copy
providers.

IBM i really needs something like Windows volume shadow copy service
so you can achieve 100% up time during backups.

This is the only reason why I see AS400 shops are down periodically,
had the database been hosted on one of a windows box we would have
much better uptime.

-----Original Message-----
From: DrFranken [mailto:midrange@xxxxxxxxxxxx]
Sent: Tuesday, November 12, 2013 3:21 PM
To: Midrange Systems Technical Discussion
Subject: Re: Back ups with High Availability Web Server

Matt,

First question is have you ever restored one of these? How does the
operating system come up when you do that?

Second is what are you doing with those servers? Are these hosting
large Oracle or MSSQL Databases or are they file and print servers? Or
are they just AD members that are used for remote desktop for example.

There is a large difference between a transaction oriented system
and a system hosting many flat (or 'stream') files.

- Larry "DrFranken" Bolhuis

www.frankeni.com
www.iDevCloud.com
www.iInTheCloud.com

On 11/12/2013 4:06 PM, Matt Olson wrote:

IBM really needs to fix this issue. Put in a Design Change Request
to
allow for online backups like you can do with Windows. We do full
(bare
metal) backups of our windows machines all the time, no downtime
required.

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