>Brian wisely observed,
>You have to test it.......no matter what. Thats like having a "Tape
>backup" system, but never actually trying to do a restore until you *have*
>to.
In the great tradition of sea stories, "Hey, this really happened!"
A couple of years ago, I had a consulting client that INSISTED on
reliable Internet connectivity. So, we implemented dual BGP routers,
one to AT&T and one to a local provider, and made sure the AT&T links
were provisioned over dual SONET.
I had done most of this design offsite. When I finally visited the
computer room, I discovered one server. When, rather shocked, I
asked what happened if the server failed, I was told they had a tape
backup. When I continued probing, and asked to what server they
would restore the tape backup, shocked looks broke out.
Incidentally, tape backup, for large transaction processing systems,
is increasingly being regarded as a secondary or legacy method.
Given the decreasing cost of mirrored disks, and the increasing
amount of time it takes to restore from a (serial) tape backup, the
restoral time with tape backup alone is unacceptable. What is
increasingly comon is to implement the database either with a doubly
or (preferably) triply redundant RAID server, or across backup
datacenters.
In the event of failure, the database fails over to a backup disk
system. With triple redundancy, that still gives you a backup while
maintenance is performed on the failed server. Tape is reasonable
for restoring the failed system once it has been repaired. After
repair, the previously failed system usually becomes a backup, rather
than taking over from the current primary server.
>
>
>On Thu, 22 Feb 2001, Z wrote:
>
>> Question... Anybody know how I can test to see if our dial backup on our =
>> devices actually kicks up when the primary interface goes down? We have =
>> dialer interfaces as our backup and I want to see if they work. I just =
>> got to this place a month ago and have noticed that in most of the =
>> devices, they don't even have the backup statements configured on the =
>> primary int. Here's the kicker. I can't take the primary down to do this =
>> and I don't feel like coming in on the weekend =3Do) I remember =
>> somebody said something about creating a floating static and pinging =
>> something but I forget what was said. Is there just an easy way to do =
>> this? I would imagine there is. Thanks all,
>>
>> ********************************************************************
>> This has been an Eyez Only streaming e-mail broadcast...We are watching.
>>
>> ~ NetEyez ~ CCNP, CCDA
>>
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>
>
>-----------------------------------------------
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>Brian Feeny,CCDP,CCNP+VAS Scarlett Parria
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