> > Hello
> > We are trying to evaluate a cluster software for our SUN/Solaris environment.
> > At present, we tend to the VERITAS cluster software as we already successfully run VxFS und VxVM
> > on our systems ( SF480, SF4800, Solaris 8, Solaris 9).
> > Does anyone have any comments to the VERITAS Cluster server or SUN Cluster ?
> > What cluster softare are you running and why ?
We have both in our farms. Since my company manages systems on behalf
of other customers, typically we provide the specific cluster solution
that the customer requests. Or, if the customer is only seeking
clustered resources, but dont care about the software providing it, we
go the VCS route.
Quote:> It would help to know what application or service you will be running
> and trying to make highly available.
It also helps to know what other things you might want to do that are
-related- to that application. For example: say you wish to have a
cluster that makes one application highly available, yet not have an
idle node, but the second application is non-critical. With VCS it's
fairly trivial to set up the cluster with the application running on
one node, but kills the non-critical application on the other node, in
the event that the primary application needs to fail over (and yes,
I've seen this requested). SunCluster is a little bit more onerous in
setting something like this up.
Quote:> In general both offer the basic failover features that you expect. VCS
> does come at a much higher price. I would look at what functionality
> you expect to get and what price you have to pay for that.
Id have to argue that: Veritas does not require that Veritas engineers
install the cluster in order for Veritas to support it. Currently, Sun
requires that either their PS or ES groups install the cluster if they
are going to support it. The contract to get Sun PS to come in and do
the work -more- than washes out any price differentials in the
software. And yes, you can get Sun ES to come in and do it, but I'd
personally recommend against it.
Quote:> Just because you run VxFS and VxVM doesn't mean you should look more at
> VCS. Sun Cluster was designed to operate with VxVM, VxFS, Veritas
> NetBackup, and many other VRTS products.
And, in fact, some of Sun's installation personnel (most of the ones
I've seen) seem to be more comfortable working in Veritas mediums and
seem completely out of their depth in SDS mediums.
Quote:> You should probably not pay too much attention to the features and
> functions of each that you won't be using and concentrate on what
> matters to your organization and your application.
For example, if you dont use Sun storage, dont even think about Sun
Cluster. If, on the other hand, you are end-to-end Sun and have all
the (many) prerequisites already in place or easily put in place, then
the Sun Cluster option may be good.
Quote:> Then look at the
> total cost of ownership over a period of time; say 3 years. Consider
> things like maintenance costs, future growth, and most important the
> professional services costs to implement it.
From experience, our VCS clusters have been a lot less trouble than
our Sun Clusters, and Veritas -seems- to have a higher level of
expertise with their clustering solutions than Sun -seems- to have
with theirs (your mileage may vary).
Quote:> No matter how tempted you
> are it is not a good idea to do this yourself. This type of software is
> not trivial to install or to configure.
Not sure I can agree with this statement.
1. I know for a fact that, compared to the last couple sets of
'engineers' that Sun sent out to install Sun Cluster, I could have
installed and configured it more quickly and with less errors. As it
was, I had to do all of the SDS work, because they were totally
baffled by the metasets (they weren't great with more traditional
ODS/SDS/SVM tasks like mirroring, for that matter).
2. VCS is dead simple to set up. Once you get your LLT and GAB choices
made so that you can start a null cluster framework, you can use
either the GUI, or script all the hares/hagrp/hasys/etc. commands.
Although, I should note that, if you wish to do either 1 or 2, go take
the appropriate classes and make sure that youre well grounded in high
availability fundamentals. If you are going to have multiple clusters
(such that you can observe Sun/Veritas install the first so that you
can apply what you see to your own, later installs) and can set
yourself up a lab environment to practice on, then DIY is definitely
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