Active/Active Clustering - W2K - Adding More Instances

We currently have two W2K Enterprise servers running MSCS and each of these
is running MS SQL2000 enterprise.
The Cluster is Active/Active and we have a single instance of SQL running on
each server.
The question I have is would it be possible to add another Instance of SQL
on both Boxes, as I understand you can have up to 16 instances on a Single
machine but did not know whether this applied in a Clustered environment,
especially in a Active/Active clustered environment, and what the
implications of this would be.
I also understand we will have to up the resources on the Server, if it is
possible to add the extra instances; we are looking at a minimum of 4
Gigabytes of RAM per server with Three 2.5 GHz Xeon Processors per server.
It is possible and, like you say, it becomes a resourcing issue. Give the
boxes as much as you can, keeping in mind a worse-case scenario of all
instances running on one node.
Tom
Thomas A. Moreau, BSc, PhD, MCSE, MCDBA
SQL Server MVP
Columnist, SQL Server Professional
Toronto, ON Canada
www.pinnaclepublishing.com
"Mike@.Synergy" <Mike@.Synergy@.discussions.microsoft.com> wrote in message
news:E3ADAAA6-9B7F-45CE-9D4A-D382936A82F4@.microsoft.com...
We currently have two W2K Enterprise servers running MSCS and each of these
is running MS SQL2000 enterprise.
The Cluster is Active/Active and we have a single instance of SQL running on
each server.
The question I have is would it be possible to add another Instance of SQL
on both Boxes, as I understand you can have up to 16 instances on a Single
machine but did not know whether this applied in a Clustered environment,
especially in a Active/Active clustered environment, and what the
implications of this would be.
I also understand we will have to up the resources on the Server, if it is
possible to add the extra instances; we are looking at a minimum of 4
Gigabytes of RAM per server with Three 2.5 GHz Xeon Processors per server.
|||Hi
In the case of a cluster, the supported limit is 16 instances per cluster.
Regards
Mike Epprecht, Microsoft SQL Server MVP
Zurich, Switzerland
IM: mike@.epprecht.net
MVP Program: http://www.microsoft.com/mvp
Blog: http://www.msmvps.com/epprecht/
"Tom Moreau" <tom@.dont.spam.me.cips.ca> wrote in message
news:O0mQmvx0EHA.3452@.TK2MSFTNGP14.phx.gbl...
> It is possible and, like you say, it becomes a resourcing issue. Give the
> boxes as much as you can, keeping in mind a worse-case scenario of all
> instances running on one node.
> --
> Tom
> Thomas A. Moreau, BSc, PhD, MCSE, MCDBA
> SQL Server MVP
> Columnist, SQL Server Professional
> Toronto, ON Canada
> www.pinnaclepublishing.com
>
> "Mike@.Synergy" <Mike@.Synergy@.discussions.microsoft.com> wrote in message
> news:E3ADAAA6-9B7F-45CE-9D4A-D382936A82F4@.microsoft.com...
> We currently have two W2K Enterprise servers running MSCS and each of
these
> is running MS SQL2000 enterprise.
> The Cluster is Active/Active and we have a single instance of SQL running
on
> each server.
> The question I have is would it be possible to add another Instance of SQL
> on both Boxes, as I understand you can have up to 16 instances on a Single
> machine but did not know whether this applied in a Clustered environment,
> especially in a Active/Active clustered environment, and what the
> implications of this would be.
> I also understand we will have to up the resources on the Server, if it is
> possible to add the extra instances; we are looking at a minimum of 4
> Gigabytes of RAM per server with Three 2.5 GHz Xeon Processors per server.
>
|||In a symmetrical multi processing (SMP) OS such as Windows you need an even
number of processors, so 3 CPUs in each box is not an option - you'll need 2
or 4 (or more).
"Mike Epprecht (SQL MVP)" <mike@.epprecht.net> wrote in message
news:ei2RYA00EHA.2316@.TK2MSFTNGP15.phx.gbl...
> Hi
> In the case of a cluster, the supported limit is 16 instances per cluster.
> Regards
> --
> Mike Epprecht, Microsoft SQL Server MVP
> Zurich, Switzerland
> IM: mike@.epprecht.net
> MVP Program: http://www.microsoft.com/mvp
> Blog: http://www.msmvps.com/epprecht/
> "Tom Moreau" <tom@.dont.spam.me.cips.ca> wrote in message
> news:O0mQmvx0EHA.3452@.TK2MSFTNGP14.phx.gbl...
> these
> on
>
|||Hi
Those Xeons ate HT so most likely, it will look like 6 processors. There are
some know issues under NT4.0 and earlier when using an odd number of
processors, but w2k and w2k3, odd number of processors is supported and runs
well. Some hardware is not capable of supporting odd number of processors,
but that is not a Windows limitation.
SQL is very happy with an odd number of processors, as on most big boxes (8
ways), usually SQL is setup to only use 7 processors to give the OS a
dedicated processors for Disk and memory management.
Regards
Mike Epprecht, Microsoft SQL Server MVP
Zurich, Switzerland
IM: mike@.epprecht.net
MVP Program: http://www.microsoft.com/mvp
Blog: http://www.msmvps.com/epprecht/
"Mike Hodgson" <mwh_junk@.hotmail.com> wrote in message
news:O8EimD30EHA.132@.tk2msftngp13.phx.gbl...
> In a symmetrical multi processing (SMP) OS such as Windows you need an
even
> number of processors, so 3 CPUs in each box is not an option - you'll need
2[vbcol=seagreen]
> or 4 (or more).
> "Mike Epprecht (SQL MVP)" <mike@.epprecht.net> wrote in message
> news:ei2RYA00EHA.2316@.TK2MSFTNGP15.phx.gbl...
cluster.[vbcol=seagreen]
message[vbcol=seagreen]
running[vbcol=seagreen]
environment,
>
|||"Mike Hodgson" <mwh_junk@.hotmail.com> wrote in message
news:O8EimD30EHA.132@.tk2msftngp13.phx.gbl...
> In a symmetrical multi processing (SMP) OS such as Windows you need an
even
> number of processors, so 3 CPUs in each box is not an option - you'll need
2
> or 4 (or more).
Do you have any cite for this?

>
|||we currently have 2 active / active SQL Clusters, that are running 2
instances each. Be aware that in addition to the added horsepower, you will
need additional IP Addresses for the extra instances. Also, your second, and
subsequent instances will be named instances, that will need to utilize a
different port(1433 will already be in use by the default instance).
"Greg D. Moore (Strider)" wrote:

> "Mike Hodgson" <mwh_junk@.hotmail.com> wrote in message
> news:O8EimD30EHA.132@.tk2msftngp13.phx.gbl...
> even
> 2
> Do you have any cite for this?
>
>
|||Actually, you can use 1433 sinced you are on a different IP address. Just
to keep things consistant, I don't use the default instance on a cluster.
That way all the instances have a consistant appearance on the network.
Geoff N. Hiten
Microsoft SQL Server MVP
Senior Database Administrator
Careerbuilder.com
I support the Professional Association for SQL Server
www.sqlpass.org
"Tom Mongold." <Tom Mongold.@.discussions.microsoft.com> wrote in message
news:476DE007-517C-40BE-B76A-8C51C59534DD@.microsoft.com...
> we currently have 2 active / active SQL Clusters, that are running 2
> instances each. Be aware that in addition to the added horsepower, you
will
> need additional IP Addresses for the extra instances. Also, your second,
and[vbcol=seagreen]
> subsequent instances will be named instances, that will need to utilize a
> different port(1433 will already be in use by the default instance).
> "Greg D. Moore (Strider)" wrote:
need[vbcol=seagreen]
|||| From: "Geoff N. Hiten" <SRDBA@.Careerbuilder.com>
| References: <E3ADAAA6-9B7F-45CE-9D4A-D382936A82F4@.microsoft.com>
<O0mQmvx0EHA.3452@.TK2MSFTNGP14.phx.gbl>
<ei2RYA00EHA.2316@.TK2MSFTNGP15.phx.gbl>
<O8EimD30EHA.132@.tk2msftngp13.phx.gbl>
<xcIpd.13725$1u.11480@.twister.nyroc.rr.com>
<476DE007-517C-40BE-B76A-8C51C59534DD@.microsoft.com>
| Subject: Re: Active/Active Clustering - W2K - Adding More Instances
| Date: Thu, 2 Dec 2004 23:55:21 -0500
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|
| Actually, you can use 1433 sinced you are on a different IP address. Just
| to keep things consistant, I don't use the default instance on a cluster.
| That way all the instances have a consistant appearance on the network.
|
| --
| Geoff N. Hiten
| Microsoft SQL Server MVP
| Senior Database Administrator
| Careerbuilder.com
|
| I support the Professional Association for SQL Server
| www.sqlpass.org
|
| "Tom Mongold." <Tom Mongold.@.discussions.microsoft.com> wrote in message
| news:476DE007-517C-40BE-B76A-8C51C59534DD@.microsoft.com...
| > we currently have 2 active / active SQL Clusters, that are running 2
| > instances each. Be aware that in addition to the added horsepower, you
| will
| > need additional IP Addresses for the extra instances. Also, your second,
| and
| > subsequent instances will be named instances, that will need to utilize
a
| > different port(1433 will already be in use by the default instance).
| >
| > "Greg D. Moore (Strider)" wrote:
| >
| > >
| > > "Mike Hodgson" <mwh_junk@.hotmail.com> wrote in message
| > > news:O8EimD30EHA.132@.tk2msftngp13.phx.gbl...
| > > > In a symmetrical multi processing (SMP) OS such as Windows you need
an
| > > even
| > > > number of processors, so 3 CPUs in each box is not an option -
you'll
| need
| > > 2
| > > > or 4 (or more).
| > >
| > > Do you have any cite for this?
| > >
| > > >
| > >
| > >
| > >
|
|
|
################################################## ########################33
33
In addition to the resources mentioned you will have to also present the
cluster with more shared disk resources on which the SQL Server data files
will reside.
Regards,
Shashank Pawar
SQL Server Support Engineer, Microsoft
This posting is provided "AS IS" with no warranties, and confers no rights.