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Conference decwet::networker

Title:NetWorker
Notice:kits - 12-14, problem reporting - 41.*, basics 1-100
Moderator:DECWET::RANDALL.com::lenox
Created:Thu Oct 10 1996
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:750
Total number of notes:3361

592.0. "mixed versions, client and server" by LEXS01::GINGER (Ron Ginger) Fri Apr 18 1997 09:21

    My customer is runnig 3.2A NSR. We are starting to look at how to
    upgrade. We have almost 40 clients and 2 servers. My suggestion is to
    fisrt upgrade the development server to 4.2C, but leave the clients 
    at 3.2A. When that looks stable, we will upgrade the Production server
    to 4.2C 
    
    When that is all stable we will finally upgrade the clients to 4.2c
    
    We do NOT trust, nor could we carry out, a concurrent upgrade of
    everything at once. 
    
    My customer wants a specific answer as to these versions being
    commpatiable.
    
    Any problems with 3.2A clients calling 4.2c servers? The customer has
    seen some item on the DEC external WEB page that he reads to mean 4.2C
    servers can only work with 4.2C clients.
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592.1DECWET::SDYLook out!!..Support Rookie sez...Fri Apr 18 1997 12:1122
    Any problems with 3.2A clients calling 4.2c servers? The customer has
    seen some item on the DEC external WEB page that he reads to mean 4.2C
    servers can only work with 4.2C clients.


While there shouldn't be any problems with 3.2A clients using a 4.2C server,
I would warn you that V4.2C requires OS Kernel patches. If the customer does
not intend (in the near future) to use the HSM features, then they might
be better off (reduced amount of transition work) using V4.2B + patch 12.

The items he's probably seen are the kernel hook requirements for the clients
since V4.2C is a DU 4.0 or better release only. If he has DU 3.2x based clients
he'll have to run NetWorker V4.2B on them (or stick with V3.2A, ugh =)

Your listed plan of attack (for upgrading) sounds very reasonable. The only
thing I might suggest, is that prior to upgrading the production server to the
newer version of NetWorker, you might want to consider upgrading a few of the
clients that are pointed at the developmental server to the newer version of
NetWorker. This will give you experience on what your production cut over would
entail. It would also be easier to back out if you find client upgrade problems.

steve.
592.2DECWET::RWALKERRoger Walker - Media ChangersFri Apr 18 1997 15:114
	Also be very carefull to check out the patch list.  There have
	been some problems in the past that have been fixed.  It shouldn't
	be a big deal if it is done with care and verification (like
	doing test recovers on the clients before and after each step).
592.3LEXSS1::GINGERRon GingerTue Apr 22 1997 11:537
    Thanks
    
    This customer (Osram Sylvania) has been hit with some kind of nsr bug
    on every version upgrade we have made. That is why they are waiting so
    long and going so slow on this one. We will follow the suggestion to
    try a few clients before the production upgrade.
    
592.4DECWET::ONOSoftware doesn't break-it comes brokenFri Apr 25 1997 11:484
A way to avoid the kernel patch issue is to use NetWorker V4.2B
plus patch 12. 

Wes