SQL 2012 :: Renamed Failover Nodes For Cluster And Broke It

Apr 17, 2014

I had a cluster running on 3 nodes (windows failover cluster) with server 2012 and SQL server 2012 running in the cluster. Well, I thought I'd just go ahead and rename all 3 of the hosts with new hostnames and it apparently broke the cluster pretty bad. Now when I open failover cluster manager I cannot see anything nor can I connect to the cluster object in AD. I re-named all of the hosts back to their original names but that didn't work.

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SQL 2012 :: Server Cluster Without Windows Failover Cluster

Feb 18, 2014

I´ve been reading that SQL Server 2012 Always On is dependent on having a Windows Failover Cluster setup. Is that correct ?

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SQL 2012 :: Maximum Cluster Nodes In AlwaysOn

Mar 17, 2014

How many nodes can you have in a cluster with SQL 2012 alwaysOn.

I understand that availability groups are limited to 5 nodes but if you had a 10 node cluster and decided to create multiple availability groups using various nodes within the 10 nodes but never exceeding 5, is that possible?

Or is there a counter or some validation from SQL AlwaysOn that actually hard limits to a grand total of 5 nodes in a cluster?

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SQL 2012 :: Same Database On Multiple Cluster Nodes For Performance?

Aug 6, 2014

Is it possible to create a cluster configuration, where 2 (or more) SQL Server instances running on different servers will simultaneously serve the same database attached to the same storage? Something like this:

Instance A Instance B Instance C
(active) (active) (active)
| /
| /
| /
SAN for Database and Quorum

The point would be to improve reliability and performance at the same time. All nodes would share load. If a node fails, the other nodes still work and take over the load.

I know a failover cluster can be done, where 1 instance is active and others are passive (active/passive) which improves reliability, but in this configuration just 1 instance is serving at the same time.

(As far as I understand, the active/active configuration is meant to run different databases on 2 (or more) instances such that the databases on a failing node are taken over by any other instances in the cluster.)

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SQL 2012 :: Failover Cluster Using Virtual Box

Mar 29, 2014

I have virtualbox installed on my notebook. For testing purpose, is it possible to setup SQL Server Fail-Over cluster using virtual box? I don't have a shared storage. How can I simulate that?

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SQL 2012 :: How To Create Failover Cluster Using VMs

May 5, 2014

How to create a SQL 2012 Failover cluster using VMs?

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SQL 2012 :: Create Failover Cluster Without Log Shipping

Jan 21, 2015

I am trying to create a failover cluster without the log shipping in 2012 as i've done it with a static instance with some database.Is the "AlwaysON" feature the solution when an application creates random and numerous databases within the instance and we need a failover scenario ?

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SQL 2012 :: Availability Groups And Failover Cluster Instances

Mar 21, 2014

I'm reading up on Always on and I am confused what is the difference between AlwaysOn Availability Groups and AlwaysOn Failover Cluster Instances.

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SQL 2012 :: Multi-Site AlwaysOn Failover Cluster

Oct 6, 2014

We are implementing a multi-site (Windows Server Failover Cluster) WSFC to enable Always On between our primary and DR site. We are not going to use SQL clustered instances. We are not planning to use shared disks. Each node is running a standalone instance of SQL 2012.

I have successfully configured a 3 node multi-site Windows failover cluster with no shared storage. For quorum, I have defined a File Share Witness (FSW). The FSW has voting rights and is in the DR site. The setup looks like this –

WSFC –

•Node A – Site #1 (voting right = 1)
•Node B – Site #1 (voting right = 1)
•Node C – Site #2 (voting right = 0)
•FSW – Site #2 (voting right = 1)

Again - There are no shared disks in our setup. We are not going to use SQL clustered instance. We are going to use Always On with these 3 nodes.

SQL Always On –

•Node A – Site #1 (Primary Replica)
•Node B – Site #1 (Readable Secondary)
•Node C – Site #2 (Readable Secondary)

All the setup including the “availability group” works properly under this setup. However, a failover to site #2 under DR situation is not working and I know why but don’t know what needs to be done to fix the problem.

The following works fine –

•Automatic failover between nodes A and B (same site – site #1)
•Forced failover to node C in site #2 provided at least one of the nodes in site #1 is up (non – DR situation) - this will ensure the cluster is up

The following is not working –

•Forced failover to node C in site #3 when both nodes in site #1 are lost (true DR situation) – This is because the cluster is not up at this point.

I know I have to bring the cluster up somehow and I have not been able to do so by restarting the cluster service.

I tried to run the command to start cluster service.

Question –

How can I FORCE the cluster to come up in Site #2 on node C when it has no voting rights?

I have always worked with even number of nodes and shared disks with traditional clustering. I am not sure what needs to be done in this scenario with 3 nodes and a FSW.

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SQL 2012 :: AG - How To Find Cluster Failover Count In AlwaysOn

Sep 30, 2015

How can we find the cluster failover count in always on ?

As my AG is configured as synchronous mode , AG went offline and we manually restarted the AG service when we check the properties on AG role they r in default setting ?

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DB Engine :: Server 2012 Failover Cluster New Instance

Aug 6, 2015

I am new to SQL Server 2012 clustering.I added a new instance to one of the two nodes.when I try to move it to the other node it fails.Do I need to install it on both?If so, what options do you install on the second node?

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SQL Server 2012 :: Remove Named Instance From Failover Cluster

Oct 13, 2014

In QA we have a two-node cluster with four instances of sql. In trying to add a fifth, I was given an IP address already in use so the install hung.

I removed it from the cluster but it is still there in the registry etc on the node I was working on.

I read about using the maintenance tab of the sql server install to "remove a node" but the terminology is confusing. To me a node is a physical server and an instance is an instance of sql server -- not the same at all but they are often referred to as the same thing.

I definitely don't want to remove one of the servers from the cluster.

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SQL 2012 :: Failover Cluster Install Hangs On Remote Machine Discovery

Feb 18, 2015

I am trying to install SQL Server 2012 onto an already configured and validated windows failover cluster (server 2012) but the process is hanging after installing the setup files.

The last entry in the log is:

running discovery on remote machine

and I've left it hanging like this for 4 hours and nothing happens.

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Recovery :: IP Change For Cluster / Nodes And Windows Cluster?

Jul 15, 2015

We are planning to change all IPs of PRODUCTION Failover Cluster Setup. In my cluster setup ... we have 2 Physical Nodes with windows-2008, Roles are MSDTC and SQL-2008R2.

IP change for:

1. Both Nodes(Physical)
2. MSDTC
3. SQL Server 
4. windows Cluster 

So Almost... All IPs are going to change.

Im DBA here, I need to take care of SQL cluster and MSDTC. But I haven't performed this activity before.So I'm worrying about Impacts and consequences of this change. steps how should I perform this activity.

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Connections Broke On Cluster

Mar 28, 2002

Hi all,

On one my cluster box, all the previous connections got broke when the cluster service move/roll over to secondary server.The previous connections were on primary server and when the roll over occurs, all these connections didn't roll over but only new connections does.
I want to know that the significance of cluster is only for new connections ?

Any ideas are highly appreciate.

TIA,
Navneet.

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SQL Server Admin 2014 :: AlwaysOn Failover Cluster Session Failover

Oct 29, 2015

1. Once fail over to secondary replica, what will happen to connected session in primary node? can the session fail over to secondary seamlessly or need to re-login. what happen committed transactions which has not write to disk.
2. Assume I have always on cluster with three nodes, if primary fails, how second node make write/ read mode.
3. after fail over done to 2nd secondary node what mode in production(readonly or read write).
4. how to rollback to production primary ,will change data in secondary will get updated in primary.

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Recovery :: AlwaysOn Failover Cluster And Active Sessions Failover Scenario

Oct 29, 2015

1. In alwaysON fail over cluster, Once fail over to secondary replica, what will happen to connected session in primary node? can the session fail over to secondary seamlessly or need to re-login. what happen committed transactions which has not write to disk.

2. Assume I have always on cluster with three nodes, if primary fails, how second node make write/ read mode.

3. After fail over done to 2nd secondary node what mode in production(readonly or read write).

4. How to rollback to production primary ,will change data in secondary will get updated in primary.

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SQL Server Admin 2014 :: Manual Failover Of HA Nodes Not Functioning

Jun 29, 2015

I have 3 node HA set up:

-MS Server 2012 R2.
-SQL 2014 EE.
-All windows updates.
-Clean install of both OS and SQL, all 3 nodes are identical.
-SQL Server is running on an alternate port, which I've opened in the firewall. Connections from all network locations are working swimmingly; including connections between all 3 nodes.
-I've got the groups up and running; Listener is set up correctly. Connections work great.
-One node is synchronous, one is asynchronous. Both show synchronized, and synchronizing respectively.
-Data added at the primary node is moved across to all 3 with lightning speed.

When I attempt a manual failover it hangs..and hangs...then pops up an error 41131 and rolls back the failover. Leaving the cluster perfectly intact and working just as it did prior to the failover attempt. What I've checked so far:

-There is absolutely NOTHING in the cluster events log.
-Windows event log shows no errors, just the standard stuff of the primary nodes state changing from primary to resolving and then back again.
-SQL Event log has a few things in there, but nothing that's leading me to a solution, I've attached the log from start to finish on an attempted manual failover:

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Cannot Apply SP2 To 2 New Nodes In A 4 Node Cluster ?

Oct 12, 2007

HI There

We had an existing 2 node active / active cluster, 1 running a default instance of Sql Server 2005 Enterprise Edition 9.0.3152 (SP2 + Hotfixes) and the other running a named instance of the same version.

We recently added 2 new nodes to the cluster, they were successfully added and we tested the cluster group failover successfuly to the new nodes.

Last night we tried to install Sql Server 2005 Enterprise edition on the new nodes.

I followed to proper proceudure of modifying the installation for both instances and selecting the 2 new nodes to apply them to. This went 100%. Sql Server 2005 successfully installed for both instances on the 2 new nodes, all log files were successful.

We then tried to apply SP2, we tried the following:

1. We ran SP2 from the active node, but when we go to the screen to select what you want to apply SP2 too we could not select anything, if you clicked on database engine the message said that these instances were already at a later version and we could not proceed. This is how i successfully applied SP2 to the original 2 node cluster but it does not work for additional nodes to an exisitng cluster.

This is also what all the documentation we could find said, refer to SP2 release notes under the topic "Failover Cluster Installation", it is also the method we found when googling.

2. We then tried what is described under SP2 release notes "Rebuild a SQL Server 2005 SP2 Failover Cluster Node".
We ran SP2 from the new nodes while they were passive, but when we got the screen where you select what to apply the SP2 too we could not select database engine the message at the bottom said that SP2 must be run from the active node and that we were attempting it from the passive node, this is what we tried in step 1 described above.

3. This was a last resort. We were advised to try failing over the instance to the new node and then running SP2. Personally i thought this was a bad idea, one should never fail over a instance of sql server to a node with incompatible binary versions and secondly when we installed sql server on the new nodes a warnng popped up before hand stating that the instances were at a later version and that the new nodes must be at this version before attempting fail over. I thought that sql would not even start, to my surprie we successfully failed over the sql group to the new node, when we ran SP2 it looked good we could select the database engine on the new node to apply SP2 too, BUT after clicking next after a few seconds the SP2 installation just closed, NO INFORMAITONAL MESSAGES NO ERRORS NO WARNINGS it just closed an never came back.

I had never seen this happen on a cluster before, needless to say this made me very nervous so we failed the sql group back to the original nodes and gave up.

PLEASE can some tell me how to apply SP2 to 2 new nodes in a 4 node cluster all methods descibed in SP2 release notes and other documentation as descibed above in step 1 and 2 do not work !

Thank You

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Build A Cluster Consisting Of Two Nodes?

Jul 15, 2015

I'm setting up a cluster to test a new deployments of SQL2K14 on a WSFC cluster (W2K12R2). Starwinds VS. the built in iSCSI service?Will either one allow me to build a cluster consisting of two nodes?  Do I need to dedicate a third node to run the iSCSI storage?

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Install Fails On X64 Cluster Nodes.

Feb 13, 2006

I can't seem to install SQL Server 2005 (x64 version) on an x64 Win2k3 two node cluster.

I get all the way through the configuration and setup fails because it cannot start a task on the remote node. The error message indicates to check the task scheduler log file, which I have and I cannot find any 'errors' in the file.

Google/MSDN/Technet turn up nothing on multiple searches. Has anyone else run into this problem?

My installation account is a local admin on both machines, so is the sql cluster account. For the life of me I cannot figure out what's different for an x64 install vs 32bit....

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Adding Nodes To An Existing Cluster

Mar 13, 2008



Hello,

We currently have a 2 node Active/Passive 2 named instance SQL 2000 cluster. We will be chaning the configuration to Active/Active, basically moving 1 instance to the passive node (so we can take advantage of the resources on the passive node).

We would also like to add 3 nodes to the cluster making it a 5 node SQL cluster. What we are thinking of doing is basically making it an Active/Active/Active/Active with the 5th server being passive. The question I have is will I be able to add and install the 3 new nodes without having to redo the SQL cluster? Should I install the two new active nodes with the default SQL instace or do I have to install SQL with named instances? (actually I think the named instances is the way to go but then I wouldn't be posting here if I was sure about the answer).

Thx!

-Albert-

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SQL 2012 :: Transactional Replication Publisher Tables Renamed?

Apr 1, 2015

I am using SQL 2012 SE and implementing transactional replication. I need to insert the rows from publisher database tables to new tables, drop the old tables and rename the new tables with the old table names.

For example:

Publisher database tables that are being replicated:

Table1
Table2
Table3

and I am going to create new tables in publisher database

Table1_new
Table2_new
Table3_new

Move data from

Table1--->Table1_new
Table2--->Table2_new
Table3--->Table3_new

Drop constraints from and then tables (does this require articles to be removed from replication?)

Table1
Table2
Table3

Rename

Table1_new to Table1
Table2_new to Table2
Table3_new to Table3

Does this require replication to set up from scratch or add the three articles only to replication? Is there a way this can be done without pausing or reinitializing replication or without removing articles and adding them back?

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SQL Server 2005 Standard On 2 Nodes Of A 4 Node Cluster

May 23, 2006

My question is, I'd like my actual cluster to have 4 servers. The virtual server that will be running SQL 2005 will only be installed on 2 of those nodes. Will this work or do I have to split my cluster in to 2 to meet the SQL Server 2005 2 node failover limitation? A basic config for the cluster would be like below....

ClusterSQLNode
Active SQL 2005 Server
ClusterExchNode
Active Exchange Server
ClusterAppNode
Active Application Server
ClusterFailoverNode
Failover SQL 2005
Failover Exchange
Failover Application

Will SQL 2005 install in a 4 server cluster if I only install it on to two of the nodes? Any potential gotchas?

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SQL Server Admin 2014 :: Add Physical Nodes And VMs To Windows Cluster?

Jan 21, 2015

Can we add physical nodes and VMs to windows cluster?

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How To Install SS2005 On New Nodes In Existing Cluster For Multiple Instances ???

Oct 5, 2007

Hi There

I have found no real documentation on this, so any links would be greatly appreciated.

We have an existing 2 node active active cluster.

A default and and named instance SS2005 Enterprise Edition are installed on the cluster.

Recently we acquired new hardware, 2 servers, which we added to the cluster so we now have a 4 node cluster.

The 2 new nodes have OS etc installed.

Now i have installed sql on a new multi node cluster, i have upgraded sql server in an existing cluster BUT i have never installed sql on an existing cluster for new nodes for multiple instances.

Now i presume you simply run the install on one of the new nodes, do this for a default instance, selecting both 2 new nodes to installl on. And do this again for the named instance.

But in the past I have never been promoted for which nodes to install sql on, it simply does all the nodes BUT i do not want this.

And how will the cluster know where the binary files are for each instance on the new nodes?

In a nutshell, how do i install sql server 2005 for 2 new nodes in an existing 4 node cluster for multiple instances ?

Thanx

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Recovery :: FCI Number Of Cluster Nodes Supported For Edition Failed

Nov 22, 2015

I have encountered issue by add a node to SQL cluster

Server 2012 R2 Datacenter version
SQL 2012 Enterprise edition

Error Status>
number of cluster nodes supported for edition - failed

I have failed to bypass with Setup /SkipRules=Cluster_VerifyForErrors /Action=AddNode

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Recovery :: Availability Group Quorum - Majority Of Nodes Down But Cluster Still Up?

Sep 9, 2015

I'm just starting to work with AlwaysOn Availability and WSFC.

I have in my environment (in Azure) a DC, WSFC and to SQL instances, so I have 3 nodes in my Failover Cluster:

WSFC 
SQL1
SQL2

If I simulate failure by shutting down one of the SQL boxes my Availability group seamlessly fails over to the other SQL instance - which is great.

However, I'm starting to look into the workings of the Quorum, my envt has the default settings and when I shutdown both of my SQL servers I expected the Cluster itself to go offline as 2 out of the 3 votes will be negative, but the Cluster is still up - Screenshot below when SQL1 and SQL2 are  shutdown:

Going through the Wizard (but not changing anything) it shows following config:

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Cluster Failover ?

Oct 2, 2007

Hi I just set up a new cluster and everything was working. Now when I try to test failovers like unplug the public network card etc...

The cluster group fails over correctly but my data and log array's dont failover.

So I unplug the network cable from node 1 (active) the cluster group with the IP, name, and Quorum disk fails over to node 2 but the other groups sql data and sql log stay on node1 and dont failover.

Any ideas?

TIA

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Cluster Failover

Mar 9, 2007

Hi all:

I was wondering what will happend to the transaction when the cluster failover from one node to another?

In my case the database is in node-001 and I need to restart the server on node-001. So I need to have the database failover to node-002, so I can work on node-001. During this process, will it effect to end-user?

Thanks
vua

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Cluster Failover Testing

Feb 29, 2000

We need to start testing our Microsoft cluster servers.
Has anyone heard of any plan or products one can use to test
the failovers?
Please advise
Thanks
Susan

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Failover Cluster Not Using All Allocated RAM

Apr 23, 2007

We are running on SQL 2000 on Windows 2003. We have active-passiveclustering set up. We have 16 GB of RAM on each box. This pastweekend, we failed over. I noticed that the Total Server Memory wentfrom about 15.5 GB to 8 GB. I have been trying to figure out why thishas occurred. Any help would be greatly appreciated.

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SSRS On A Failover Cluster

Apr 9, 2008



We need to install the webservice and the database on a failover cluster. Our plan was to install the web service on node 1 and the database would naturally be on the cluster aware sql service. We know the RS will not be cluster aware and if node1 bites the dust, reports will be out of business.

We were planning to do this tommorow on development, but then found this little tidbit - read the very last paragraph

http://www.microsoft.com/dynamics/crm/using/deploy/clusteringssrs.mspx

SQL Server Reporting Services failover cluster configurations that are not supported

Do not deploy both SQL Server Report Services and the reporting services databases on each node of a multi-node cluster. Moreover, do not deploy SQL Server Reporting Services in a two-node cluster environment that consists of an active node and a passive node where the passive node becomes active during a failover.



They don't explain why not to do it - as if it will destroy your machine! This is our main dev cluster and we don't need it to go down.

We will not be installing the RS on each node, just one. But I was thinking that if the dns entry for the service points to N1, it will continue to function and make successfull DB calls to the sql server cluster name.


Could this work? I've found posts of people installing RS on both nodes and having success - but this would probably require another license...which we don't have.

Thanks so much for your help - it is greatly appreciated.

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