SQL ServerHigh Availability

Hi
We have different office has its own set of legacy databases, for functions like HR, Finance etc. While each office has fortuitously chosen the Microsoft application stack, that they have, until recently, been independent organisations means that each office’s
databases relies on different versions of the underlying technologies. For example, some offices are running SQL server 2005, some running 2012. Some have chosen to implement clustering, some have not.
I have been asked to advise on a plan to consolidate these local databases into a global solution. the role is to ensure that the end result is ‘fit for purpose’ as a production level solution for the firm.
so My question is
What aspects of the behaviour or structure of the final system you believe?
Any Assumptions ?
Thanks

The canonical architecture on the Microsoft stack would be to run a small number of Hyper-V clusters (or subset of an existing cluster) purpose-built for running SQL Server VMs. Then consolidate existing databases/instance onto the new cluster.
You should consolidate multiple databases onto shared SQL Server instances where practicle, and use dedicated VMs for where it is not.
You can then add-on self-service provisioning of SQL VMs and SQL Databases, and Management with System Center. If you do, you end up with what we call a "SQL Server Private Cloud".
http://channel9.msdn.com/Events/TechEd/NorthAmerica/2014/DBI-B383#fbid=
http://www.microsoft.com/en-us/server-cloud/solutions/virtualization-private-cloud.aspx
David
David http://blogs.msdn.com/b/dbrowne/

Similar Messages

SQL AlwaysOn Availability Group modifies preferred owner node on move/failover

I have a two node Windows Server 2012 R2 failover cluster with two SQL Server 2012 Enterprise AlwaysOn Availability groups configured. Within the cluster I have configured a preference order on which node a AlwaysOn Availability Group should run.
Get-ClusterGroup -Name "AlwaysOn1" | Set-ClusterOwnerNode -Owners "node1","node2";
Get-ClusterGroup -Name "AlwaysOn2" | Set-ClusterOwnerNode -Owners "node2","node1";
After configuring the preference and retrieving the preference order it is configured as it should be. When I do a failover the preference order is adjusted to first the node it currently runs on and second the other node instead of leaving the preference
order as it was. It doesn't matter if I use the PowerShell "Move-ClusterGroup" or the "ALTER AVAILABILITY GROUP [AlwaysOn1] FAILOVER" T-SQL command. From the cluster log it is shown that the preference is modified after the resource
has been moved.
INFO [GUM] Node 2: executing request locally, gumId:15859, my action: /rcm/gum/SetGroupPreferredOwners, # of updates: 1
INFO [RCM] rcm::RcmGum::SetGroupPreferredOwners(AlwaysOn1,<vector len='2'>
The default groups within the cluster "Available Storage" and "Cluster Group" keep their preference setting when configured (only configured for testing to verify it has to do with the SQL Server Availability Group resource type).
The Windows Server 2012 R2 servers are updated using the latest Windows Updates and SQL 2012 has build number 11.0.5556.
For other cluster groups which I have configured in the past like file, Hyper-V (used for affinity to get VM's which have a lot of traffic between them within the same virtual switch to reduce latency and additional hops. it would be nice if vNext will have
a affinity option for cluster groups besides the anti-affinity within the current version)
I would like to know if someone could explain why the SQL Server Availability Group resource always modifies the group preference. I might understand this with a three node cluster where the first two are running in Synchronous commit mode and the third
one in Asynchronous commit mode.
Thanks in advance,
Dennis van den Akker

Hi Dennis van den Akker,
Do not use the Failover Cluster Manager to manipulate availability groups, for example:
Do not add or remove resources in the clustered service (resource group) for the availability group.
Do not change any availability group properties, such as the possible owners and preferred owners. These properties are set automatically by the availability group.
Do not use the Failover Cluster Manager to move availability groups to different nodes or to fail over availability groups. The Failover Cluster Manager is not aware of the synchronization status of the availability replicas, and doing so can lead to extended
downtime. You must use Transact-SQL or SQL Server Management Studio.
The related KB:
Failover Clustering and AlwaysOn Availability Groups (SQL Server)
https://msdn.microsoft.com/en-us/library/ff929171.aspx
The similar thread:
SQL Server Clustering 2008 (Multi Node)
https://social.msdn.microsoft.com/Forums/sqlserver/zh-CN/c35fe863-3fed-4a6e-830b-b79aa032c198/sql-server-clustering-2008-multi-node?forum=sqldisasterrecovery
Best Regards,
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

Multi Site SQL High Availability group

Hi,
We have our primary Data Centre where we have 2 MS SQL 2012 Enterprise Servers and 2 SharePoint 2013 Enterprise servers.
We have SQL High Availability group implemented on our primary Site (Site A)
Site A has subnet of 192.168.0.0.
We recently added a new DR Site (Site B). Site B we have MS SQL 2012 Enterprise Servers. Site B have a subnet of
172.1.1.0
Both sites are connected via a VPN Tunnel. MS SQL 2012 Enterprise Server on Site B has been added in have SQL High Availability
group of Site A.
SQL High Availability group have 2 IPs 192.168.0.32 and 172.1.1.32. SQL Listener have 2 IPs 192.168.0.33 and 172.1.1.33
We want to make sure that if Site A completely down then Site B work as an active Site. But when Site A down we are unable
to ping High Availability group and Site B is unable to work as active site. SQL and SharePoint services are completely down.
Site A has AD(Primary Domain Controller) and Site B has ADC(Additional Domain Controller).
Site A has witness server.
We are using Server 2012 Data Centre
Please suggest.
Farooq

SharePoint is not the same as any other applications. The DR site has to be a completely different farm from your production. This means that the SharePoint_AdminContent and config databases on both farms are different and should not be included in the Availability
Group (they do not support asynchronous Availability Group.) Only content databases and other SharePoint databases supported in an Availability Group should be included as per this
TechNet article. Have a look at this
blog post for your networking configuration.
The reason your Windows cluster service goes down in the DR data center when the when your primary data center goes down is because the cluster has no majority votes. You have 4 available votes in your cluster - 3 in the primary data center in the form of
the 2 Availability Group replicas and the witness server and 1 in the DR data center. If the Windows cluster does not have majority of votes, it automatically shuts down the cluster. This is by design. That is why when this situation happens, you need to force
the cluster to start without a quorum as described in
this article (Windows Server 2012 R2 introduced the concept of dynamic witness and dynamic quorum to address this concern.) By default, the IP address of the Availability Group listener name will be registered on all of the DNS servers if the cluster is
running Windows Server 2012 and higher (this is the RegisterAllProvidersIP property that Samir mentioned.) However, you need to flush the DNS cache on the SharePoint web and application servers and point them to the correct IP address on the DR server after
failover. This is because the default TTL value of the Availability Group listener name is 20 minutes.
It is important to define your DR strategies and objectives when designing the architecture to make sure that the solution will meet your goals. This will also help you automate some of the processes in the DR data center when failover or a disaster occurs.
Edwin Sarmiento SQL Server MVP | Microsoft Certified Master
Blog |
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SQL Server High Availability and Disaster Recover Deep Dive Course

SCOM 2012 R2 Management Servers and SQL Server Availability Groups

My team is in the middle of rolling out a brand new install of System Center Operations Manager 2012 R2.
I have set up a SQL Server Availability group that is spread across multiple subnets and installed the initial management server per
here.
As I have gone through attaching new management servers, I have noticed disturbing behavior. When the AG fails over to another node, the management servers will lose connectivity unless I either recycle the service or it fails back to the original
node. This is not a security issue as I have set up permissions. It says it cannot connect to the database anymore at all.
Has anyone else seen this behavior? Is there a setting I am missing somewhere?
Thanks for your help.
Dale

Hi Dale,
What about ApplicationIntent\Readonly?
http://msdn.microsoft.com/en-us/library/hh205662(v=vs.110).aspx
Still thinking about DNS, may be this could be for your case:
http://www.sqlservercentral.com/Forums/Topic1449216-2799-1.aspx
Natalya

Backup Maintenance Plan on SQL AlwaysOn Availability Group Secondary Read-Only node

I have 3 node SQL 2012 AlwaysOn Availability nodes with the 3rd node as Read-Only.
The backup job within SQL Maintenance plan is failing with the following error:
Failed:(-1073548784) Executing the query "declare @backupSetId as int
select @backupSetId =..." failed with the following error: "Cannot open backup device 'C:\\SQLDBName_backup_2014_06_08_170156_9292095.bak'. Operating system error 2(The system cannot find the file specified.).
VERIFY DATABASE is terminating abnormally.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
I have verified the SQL AlwaysOn Backup preference to be "Prefer Secondary"
Is there any special steps/settings I need to do to setup and run the backups using maintenance plan in SQL AlwaysOn?

Hi,
I'm marking the reply as answer as there has been no update for a couple of days.
If you come back to find it doesn't work for you, please reply to us and unmark the answer.
Thanks.
Tracy Cai
TechNet Community Support

No SQL datasources available in EAS 11.1.1.3

Hi All,
i try to connect to a SQL source from EAS (11.1.1.3) but it doesn't show up.
I have a SQL server and setup an ODBC connection to that SQL server and a specific database. The ODBC Data source test (System DSN) was succesfull).
But wen opening SQL from the rules file there are not SQL data sources available.
Any suggestions?
Thanks in advance,
Marc

I too have the same problem.
I have setup the Datasource for an Oracle db in the Essbase Server (which is on a Unix Box) using the Oracle Wire Protocol.I tested the ODBC connection in the Server and it connect with the credentials.
But if i choose the same DSN in the EAS and try to connect i get the below error
Error: 1021001 Failed to Establish Connection With SQL Database Server.
I even downloaded a document from the Oracle site.. on the SQL interface in Essbase but i could not find the inst-sql.sh file to enable Essbase SQL Interface on the server. Is this required??
I tried with both the User & System DSN on the server but no luck.
Any help on this will be highly appreciated. Thanks in advance.

SQL Server Availability Groups

Hello,
If we want to use SQL availability groups and have the secondary used only for reporting purposes and not DR, do we still need to use the Windows clustering?
Thanks,
m

Take a look into replication or database snapshots if AG does not fit you,
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
MS SQL optimization: MS SQL Development and Optimization
MS SQL Consulting:
Large scale of database and data cleansing
Remote DBA Services:
Improves MS SQL Database Performance
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2012 SQL AlwaysOn Availability Group - JDBC re-connection not happening in case of Multisubnet failover

Hi There,
Having some problem with MultiSubNet AG failover re-connection using SQL JDBC driver 4. Details given below.
SETUP:
We have a three node 2012 Windows Server Cluster, on top it we have 2012 SQL Sever AlwaysOn Availability Group.
Two nodes are in one subnet and other in a different subnet to make this as a multisubnet AlwaysOn AG.
An AG Listener is configured with a DNS name and two VIP assigned (For two subnet) to it. We were able to failover from one subnet to other using the SQL Studio successfully.
NEED:
We have a java application which will be connected to AG Listener name. In case of failover, automatic re-connection to DB/AG Listener name should happen.
For this we use "sqljdbc4.jar" and added
'multiSubnetFailover=true' in our connection string. The connection String is given below.
cURL="jdbc:sqlserver://testsqlag:1433;databaseName=SalesDB;multiSubnetFailover=true;loginTimeout=200;applicationName=MyApp";
THE PROBLEM:
In case of AG failover, driver is not trying to re-connect to the AG Listener name. Not sure how to make it work.
Is this supported in SQL Server 2012 ?
Thanks,
Krishna.

Hi Sean,
Thanks for your answer.
I looked at the link earlier, but it was not very clear that, whether the mssql jdbc driver will automatically re-connect to AG Listener name in case of failure of Primary replica which will result in Multisubnet failover. Pasted the confusing statements
from the link
http://msdn.microsoft.com/en-us/library/gg558121(v=sql.110).aspx.
Also, because a connection can fail because of an availability group failover, you should implement connection retry logic, retrying a failed connection until it reconnects.
Connecting With MultiSubnetFailover :
During a multi-subnet failover, the client will attempt connections in parallel. During a subnet failover, the Microsoft JDBC Driver for SQL Server will aggressively retry the TCP connection.
Thanks,
Krishna.

How to configure current SQL high availability cluster using mirroring with dedicated replication NICS?

We have a current HA cluster at center1 which is mirrored to another HA cluster in center2. We have several instances already installed and working which are using one NIC for data and replication. We want to prevent mirror failovers by
configuring a NIC on a replication network which has no DNS server. What are the steps to configure the current SQL instances to use this dedicated NIC for mirror replication?

Hi dskim111,
You can refer the following step by step article to create the dedicated mirroring NIC,
Step by Step Guide to Setup a Dedicated SQL Database Mirroring(DBM on dedicated Nic card)
http://blogs.msdn.com/b/sqlserverfaq/archive/2010/03/31/step-by-step-guide-to-setup-a-dedicated-sql-database-mirroring-dbm-on-dedicated-nic-card.aspx?Redirected=true
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Finally! T-SQL Reference for SQL 2014 available for download!

With a mere delay of four month since the release, it is now possible to download the T-SQL Reference for SQL 2014 for your local copy of Books Online. Due to some reorganisations of the reference material on MSDN, the language reference was misisng from
the initial download.
To get the reference, you need to use Manage Help Settings, which you find the SQL 2014 program group. Select the option "Install content from online". Once all information has been loaded, scroll down to the SQL Server 2014 group and you will
SQL Server Language Reference with an Add option, which you should select.
Now, SQL 2014 uses Help Viewer 1.0, which is very poor, and versions 2.0 and 2.1 which ships with VS 2012/2013 is much more pleasant to use. Thanks to SQL Server MVP Simon Sabin, you can get the SQL 2014 into Help Viewer 2.x in this way. Go to
https://helpviewerredirector.codeplex.com/
save the file to a directory. Open a command prompt in that directory and run "HelpViewerRedirector download". Then in Help View, go to manage settings, and select install content from disk. Browse to the folder and select the files you want to see
in Help Viewer 2.1.
Erland Sommarskog, SQL Server MVP, [email protected]

To get the reference, you need to use Manage Help Settings, which you find the SQL 2014 program group. Select the option "Install content from online". Once all information has been loaded, scroll down to the SQL Server 2014 group and you will
SQL Server Language Reference with an Add option, which you should select.
If you need more detailed instructions on this part, see the comment from Microsoft added today (2014-08-01) to
http://connect.microsoft.com/SQLServer/feedback/details/859047/t-sql-reference-and-xquery-reference-missing-from-downloadable-version-of-bol-2014
Erland Sommarskog, SQL Server MVP, [email protected]

SQL 2014 Linked Servers with Availability Groups

Good afternoon All. Hope your well. We have SQL 2014 Availability group setup over multiple Subnets.
So basically Instance A(In Primary DC), and Instance B (Secondary Replica, in secondary DC), with AG1 (Availability Group)
When I connect to the instance Directly (using SQL management Studio), and attempt to create a linked Server to another SQL 2014 instance (Instance D, Both use the same Service Account), I am able to successfully connect, and run query on the Linked Server.
However when I connect to the Availability group, I attempt to open the linked server (to Instance D) and receive the following error:
Login Failed for User 'NT Authority\Anonymous Logon'
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SPN to the Service account;
Setspn -A MSSQLSVC\AG1.mydomain:1433 mydomain\ServiceAccount
However, Im a little unsure at this stage, should the port in the above command reflect what the AG1 endpoint ports are? As I have done that (as well as trying port 1433), and unfortunately the error still happens. Your assistance would be appreciated,
kind regards,

Hi Nsaneone,
>> Setspn -A MSSQLSVC\AG1.mydomain:1433 mydomain\ServiceAccount
>>However, Im a little unsure at this stage, should the port in the above command reflect what the AG1 endpoint ports are?
The port in the above command should reflect the port which the availability group listener is listening on, but not the endpoint port.
>> Login Failed for User 'NT Authority\Anonymous Logon'
According to the error message, it always occurs when the Kerberos authentication fails in SQL Server, there are proposals for you troubleshooting the issue.
1. Make sure that your service accounts have “Trust this user for delegation to any service (Kerberos only)” enabled in Active Directory.
2. Make sure that SPN’s are registered successfully for all SQL Server instances.
3. The server must be using TCP/IP or named pipes network connectivity.
For more details about the error, please review the following links.
http://mssqlwiki.com/tag/login-failed-for-user-nt-authority-anonymous/
http://blogs.msdn.com/b/karthick_pk/archive/2009/01/23/kerberos-authentication-in-sqlserver.aspx
Thanks,
Lydia Zhang

Alwayson Availability groups for a WSFC hosting mutliple SQL FCI's

Hello,
I have a question regarding SQL server FCI's and alwayson availability groups.
Today I have a customer running a 2 node WSFC hosting 9 different SQL FCI's.
Plan is to introduce on this setup SQL alwayson availability groups one per SQL FCI.
Per SQL FCI, running on the 2 node WSFC, we are planning to introduce a dedicated
alwayson availability group with 2 replicas. On replica as primary linked with the
FCI and one replica as secondary on 1 extra node added to the WSFC.
Question i have is, is this a supported configuration?
Thanks in advance
Regards
Raf

This is a supported scenario. However, make sure that no FCI node will run a SQL Server instance acting as a replica. This means you cannot install a standalone instance on one of the FCI nodes and make it an AG replica. You also cannot configure another
FCI in the same WSFC to be a secondary replica in an AG. If you intend to configure AG per SQL Server FCI, you need to add another node in the WSFC and install a SQL Server instance on that node. This can be a SQL Server FCI (which means you need to add two
more nodes instead of just one) or a standalone instance. Also, having an FCI in an AG configuration means that you lose the ability to do automatic failover on the AG-level. This is because the FCI takes care of automatic failover on the instance-level.
Edwin Sarmiento SQL Server MVP | Microsoft Certified Master
Blog |
Twitter | LinkedIn
SQL Server High Availability and Disaster Recover Deep Dive Course

SQL 2014 Always On Availability Groups

It appears to be working. I've attached a picture of the role that was created when I was finished configuring WSFC. Is there something that would I can check that would give me a definitive answer?

I am testing SQL 2014 availability groups and I have run into a snag. I setup a win2k8 r2 DC and two windows 2012 R2 servers running SQL 2014 standard. I setup failover clustering for the two SQL servers. In SQL Management Studios I have setup the availability group and everything seems to have been successful. except when the wizard completes I get an error Creating availability group listener resulted in an error.....Error 41009.The AG seems to be working I can connect to the AG in SSMS using the listener name. But in the Availability Group Listener section there is no listener setup. Also the databases also seem to be read only if I connect thru the listener name. The AD computer account seems to be setup correctly. I am just unable to create the listener in SQL. Is there a security permission in SQL that I could have missed. Any...
This topic first appeared in the Spiceworks Community

SQL 2012 Always On Availability Create Key for Dynamics CRM syntax

Hi I am trying to follow this terribly written article to setup CRM to be part of a SQL alwayson availability group.
The part that is pissing me off is the create SQL logins. http://technet.microsoft.com/en-us/library/jj822357.aspx#BKMK_always_updateorg
So many errors with this post causing so much frustration. What is the actual correct Syntax for creating the key?
Obviously you have to use a UNC path to the CRM front end server. SQL doesnt like UNC and I think an earlier guy said it doesnt like double quotes. Here is what I have and it does not like it. Its hard to see but right before end I have two
single quotes to close it. It's complaining about the \\ in the UNC path.
IF NOT EXISTS (SELECT * FROM sys.asymmetric_keys WHERE name = 'MSCRMSqlClrKey') BEGIN EXECUTE ('CREATE ASYMMETRIC KEY MSCRMSqlClrKey FROM EXECUTABLE FILE ='\\CRM2013\C$\Program Files\Microsoft Dynamics CRM\tools\Microsoft.Crm.SqlClr.Helper.dll'')END

I finally got it working not by using the syntax in that article though. First I did the select all from to see if the key existed by itself
SELECT * FROM sys.asymmetric_keys WHERE name = 'MSCRMSqlClrKey'
NO key was there so then I did
CREATE ASYMMETRIC KEY MSCRMSqlClrKey FROM EXECUTABLE FILE ='C:\Program Files\Microsoft Dynamics CRM\tools\Microsoft.Crm.SqlClr.Helper.dll'

CF Standard, MS Exchange and SQL on one computer - best practices?

After attending Ryan Favro's session on vmware, I realized my
one box should function to it's full capacity (it's a dual physical
processor Supermicro/AMD Opteron w/ 8 hotswap Raptors, expandable
to a quad 2.6Ghz/8Gb RAM).
I had planned on running CF Standard (bought it), SQL
Express, and in fact all of my development stuff (Flex/Photoshop
CS2, which I also bought)) on this box, but that idea blew up when
I realized my PNY Quadro wouldn't run under Server 2003SBS (which,
you guess it, I also bought LOL). So, I've stripped out the
GUI-stuff - it's just going to be a server (web/email and database)
now. Webserver for my own sites, so no reason to spend money I
don't have on Enterprise CF. I will probably run a bunch of stuff
for friends under my domain in folders, i.e.,
faceitphoto.ca/mystuff, faceitphoto.ca/friend1stuff,
faceitphoto.ca/friend3 stuff...not more advanced than that. They
can forward/cloak however they see fit at their expense.
I see SQL Is available in a version that offers web services
- is that valid to me at all? Or am I good with just the MS SQL
Express?
Is MS Exchange going to function fine as the email server in
CF, i.e., can I point it as the source in Administrator? I have the
MX entry or whatever it's called from my ISP for faceitphoto.ca
pointed to my static IP.
Most importantly, as per the title, how would you recommend
setting this up? Should I buy XP Pro and run SQL under it, and CF
under my Server 2003 with the mailserver (Exchange) running in the
same environment? Is vmware the answer here?
Any other suggestions? I'm pretty much out of money after the
laptop comes...
And yes, I'm a bit out of my league here, so I will take the
recommendations to someone who knows what they are doing. I want
the OS/Apps drives all Ghosted when it's done (running, configured,
current updates applied). This isn't for a business (yet), so
please keep your $$$ recommendations with that in mind...but I am
very serious about trying to buildng something I COULD turn into a
small business down the road, i.e., I like to build photo galleries
and have 'informal' expectations at work to maybe cobble together a
dashboard with CF/SQL/Flex2/FDS2, and a few mgmt/reporting areas
(they'd run it from there, this would be a development
environment). Who knows from there...
Shawn

hi
"I see SQL Is available in a version that offers web services
- is that valid to me at all? Or am I good with just the MS SQL
Express?"
>Sql express is just fine for start, if you are not happy
stripped sql you can allways start to use other version and import
db's there.
"Is MS Exchange going to function fine as the email server in
CF, i.e., can I point it as the source in Administrator? I have the
MX entry or whatever it's called from my ISP for faceitphoto.ca
pointed to my static IP."
>yes you can. you can still use your isp mailserver if you
dont want to use/maintain exchange.
"Most importantly, as per the title, how would you recommend
setting this up? Should I buy XP Pro and run SQL under it, and CF
under my Server 2003 with the mailserver (Exchange) running in the
same environment? Is vmware the answer here?"
>same enviroment is fine. you can spend $ to dedicated sql
box but why?
you can use wmvare too, it up to yours how you want to
maintain you dev/prod enviroment.
"I want the OS/Apps drives all Ghosted when it's done
(running, configured, current updates applied)."
>set some raid to your disks like 2 system disks and rest
for data and/or apps.
wmvare and you can have easy machine images, it make life
easy when troubles come..
if you do not select wmvare you can use symantec ghost
software to create images
select some backup software and maybe external hd (network
capable) where you do your daily backups
and firewall to protect your stuff!
cheers
kim

SQL ServerHigh Availability

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