A cluster consists of a group of computers connected so that in many respects they can be viewed as a single system.

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Restart the active node services without failover [on hold]

On a 2 node cluster configuration, How to restart the SQL services on the Active node without failing over on to another node?
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mysql sharding techniques

I have developed one website for social network and I have used mysql for data storage. Now a days, many tables become a very huge (2-3 tables has 30 million records & 3-4 table has 300k records) ...
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246 views

Multiple IPs registered for listener when using AlwaysOn AGs w/ multi-subnet clustering

We are testing AlwaysOn Availability Groups on a WSFC multi-subnet cluster and using dynamic DNS registration. Our issue is that sometimes the IP for the Availability Group Listener (AGL) in the ...
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2answers
178 views

MySQL CLuster SETUP

Good day! About MySQL Cluster, is it possible to set it up on only two machines? Is it advisable? We currently have MySQL replication setup on our two databases, and we would like to implement R/W ...
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3answers
21 views

Clustering MySQL with InnoDB engine

I have a MySQL single server setup with all tables using the InnoDB engine (because I need support for foreign keys). As response times are getting longer, I now believe I need to create a cluster of ...
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2answers
26 views

Disabling sql services while performing maintenance on SQL Server 2008 R2 cluster

Our storage team is performing updates on an MPIO driver for our SQL Server 2008 R2 cluster. They suggested disabling the sql server service on the node they are doing the update on - will disabling ...
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1answer
36 views

Oracle RAC, unable to connect to node vip [closed]

I have a new oracle RAC installation running 11.2.0.4 on redhat 6. I can connect to sqlplus from a client using the node name but it is timing out when i use the node vip eg. first one works, second ...
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2answers
1k views

SQL Server cluster questions please

We have SQL Server 2008 R2 cluster active/active/active (a, b, c) and three instances run on this environment. We did a test on one of the instances, and failover test. Manual failover from node c ...
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1answer
1k views

SQL Cluster Resources Disappear After Removing Disk Resource

In the process of removing an usused disk resource from cluster, I would follow these steps: 1) remove dependencies on the disks by the SQL Server resource, 2) take the disk resource offline, 3) ...
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14 views

Failover Cluster Instance work without quorum

I have a environment with three nodes with installed SQL Server on them. All three nodes are parts of FCI and quorum setting is Node Majority. In start, first node is role owner, and all three nodes ...
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1answer
52 views

Is Service Pack 2 completely installed on Passive Node of SQL Server 2012 Instance?

We are applying SQL Server 2012 Service Pack 2 (SP2) to a two-node active/passive cluster, starting with the passive node (as per best practices): How to install a Service Pack at a SQL Server 2012 ...
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30 views

Query to Find Cluster Nodes for an Instance

I need a way, using T-SQL, to find the nodes available to a SQL instance. I have 3 nodes in a cluster running several instances of SQL Server, each instance is 2012 Standard and so can only be ...
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302 views

Active/ Active SQL Server Clustering on AWS

I need to design and implement a highly available SQL Server 2012 clustering on Amazon AWS. In the white paper presented by Amazon, they provided an example of Active/ Passive SQL Cluster. Do you know ...
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“Access is denied” when connecting SSMS to Integration Services

I receive the following error when attempting to connect SSMS to Integration Services using a particular SQL Server cluster's network name: Connecting to Integration Services service on the ...
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0answers
26 views

Alwayson cannot fail over using tsql

I have an Alwayson test environment with the following settings. My test goals are as follows: When SqlNod1 is primary instance, I want SqlNod2 to answer read-only queries. When SqlNod2 is primary ...
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1answer
48 views

Risk in evicting node from SQL Server cluster without prior uninstalling of SQL Server binaries

I have to perform upgrade of a SQL Server failover cluster with several SQL Server 2005 instances running on two Windows Server 2003. Since the plan is to have servers running Windows Server 2008 and ...
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1answer
557 views

Error installing Clustering with SQL Server 2012 on Windows Server 2012

We are installing SQL Server 2012 on Windows Server 2012 and trying to accomplish clustering. We've setup all the core functionality on the servers: advanced cluster preparation on all nodes and ...
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28 views

Filestream on a SQL Cluster during failover sits at 'Pending Recovery'

We have an application using FILESTREAM storage which is also hosted on a SQL cluster. Unfortunately, when we fail the SQL cluster over between say, node 1 and node 2, it works on one node, but when ...
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92 views

Multi-Instance Windows Failover Cluster - Min / Max Memory Allocation Dilemma

We run numerous 2 node SQL Server 2008 R2 Failover Clusters in Windows Server 2008 R2 on a VMWare eSXi virtual platform. Each cluster hosts 3-4 SQL instances with varying degrees of memory ...
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47 views

Couldn't setup postgresql cluster with heartbeat pgsql ra

I'm trying to install postgresql cluster with the following configuration: 2 virtual hosts with RHEL 6.6 x64: postgresql 9.1 with hot standby replication pacemaker 1.1.12 resource-agents 3.9.6 I ...
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83 views

SQL Server 2008 R2 Cluster Service pack 3 fail to failover node

I have a SQL Server R2 cluster on Windows 2008 R2 boxes, and today i was to install SP3. I installed it without any errors and rebooted the passive node. When i then try to failover to the passive ...
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1answer
131 views

Mysql Cluster vs Percona/Maridb Cluster [closed]

We want to setup a mysql cluster with master-master sync replication, to provide HA so that one db for write from one app, other for write from other app. It is a webapp with high write and medium ...
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1answer
1k views

Problems with clustered DTC server 2008 R2 when failed over or restarted

I had a working clustred DTC, but due to a disk migration, I had to delete the service and recreate it. Thats how the problem started. When I recreate the service, it comes online perfectly. But when ...
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69 views

SQL Server cluster instance restarted twice, need help digging through cluster logs

Scenario: two Windows Server 2012 Standard boxes, housing 4 SQL Server 2012 Standard instances (2 active on each node). Housed in Cisco UCS B200 blades and on a Hitachi HUS 110 SAN (all cluster drives ...
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1answer
39 views

In mongodb cluster, Can I shut down one config server and one data server in the shard at the same time

I have one mongodb cluster, including 3 config servers, and one shard (3 data servers in this shard). One data server and one config server are on the same machine. Can I shut both of them down to ...
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70 views

Oracle 11g xe replication/cluster free license?

I am new to db clustering/replication and I want to set up a cluster/replication of a database backed by t2 nodes. I used docker and spun up a preconfigured oracle 11g xe database ...
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41 views

Single node SQL Server 2014 cluster at DR environment

We are setting up a new Disaster Recovery environment. On Production we have SQL Server cluster with two nodes. For DR we decided that one node should be enough. The plan is to add the second node ...
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54 views

Mirroring via dedicated NIC between two multi-instance clusters

Scenario: Two node SQL Server 2012 cluster in Primary Site. Two node SQL Server 2012 cluster in DR site. Both sites connected via general MPLS network. Replication line available between the two. ...
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1answer
40 views

Agent service account shows as not clustered

One of the SQL Server 2008 R2 instances I administer is running on a two node Windows Cluster (Windows Server 2008 R2 Enterprise) When I run the DMV sys.dm_server_services, SQL Server Service Account ...
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52 views

ComputerNamePhysicalNetBIOS and “Current Host Server” shows different machines

I have a SQL Server 2008 R2 instance on a two node (say names X and Y) windows server cluster (Windows Server 2008 R2 Enterprise). Server Manager on both nodes shows 'X' as the 'Current Host ...
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44 views

SQL Cluster, AlwaysOn AG, or Something Else? [closed]

I really needs some help with Setting up SQL servers. We are re-configuring our network and have no clue how to resolve our SQL issue. My Network Admin. wants an "Active/Active" with shared storage ...
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1answer
40 views

Setup MongoDB replica servers with different power?

Is it a good practice to setup replicas with the same machine size (wrt. CPUs, RAM, Bandwidth, etc.) or can replicas be based on smaller machines? One usecase might be to have a small non-voting ...
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96 views

How to configure an instance to listen on port 1433 to allow remote connection

Trying to connect using SQL Server Management Studio 2012 on a Windows 8.1 Client computer from outside the cluster's domain. Cluster is a two node Virtual Cluster made from Windows Server 2012 R2. ...
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Understanding two NICs requirement for SQL fail over cluster

I am trying to make an SQL Server 2013 fail over cluster. I have two DB machines. I understand that both machines need 2 NICs each. In my organization the IP scheme assigned is something like ...
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2answers
294 views

Change SQL Server 2000 from Active/Active to Active/Passive

I know it's cringe-worthy to use this term, but I have a SQL Server 2000 cluster with one clusetered instance running on it with multiple resources running on one of the two servers in the cluster all ...
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2answers
455 views

Experience with Scalearc sharding?

Does anyone have experience with Scalearc sharding and it's ability to scale ? Does Scalearc needs to have the whole data in memory or does it behave well with disk storage ? I'm thinking to big ...
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32 views

What is exactly a uniform server in a galera cluster setup?

In many manuals about performance tuning and avoid Galera's MySQL cluster limitations they write the below suggestion. It is possible for a slow/overloaded master node to affect performance of ...
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“Skipping the default startup of database” SQL notification for AlwaysOn Cluster

So I set up our SQL servers to notify us of alerts at severity 17 or higher (as advised by various SQL Server articles). I've done this to each node of a SQL Server Always On Availability Cluster, ...
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1answer
147 views

How can I achieve clustering of rows without the exclusive lock and logging overhead of the `cluster` command?

The CLUSTER command on a big table can take a long time, and blocks both reads and writes to the table while it runs. I don't need the data in my table to be strictly sorted in index order, I just ...
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190 views

Controlled shutdown/startup of a cluster

My three node SQL Server 2008 R2 physical server cluster needs to be shutdown, moved along with its storage to a new location, and restarted once in the new location. My desire is to have a clean, ...
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1answer
433 views

MariaDB Galera Cluster wsrep_cluster_address not working

I have configured MariaDB galera cluster with three nodes on CentOS-6.5 64bits: db1 - 192.168.1.111 db2 - 192.168.1.112 db3 - 192.168.1.113 My /etc/my.cnf.d/server.cnf file is configured as ...
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2answers
641 views

Within a RHEL 6.3 + High Reliability Add-on, how do I add DB2 (v9.7) into a service group to have the service controlled by the cluster?

I have a cluster of machines running RHEL 6.3 with the High Reliability Add-on. I have configured a Clustered Logical Volume Manager (CLVM) file system for DB2, which is working correctly. Our DBA's ...
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SQL nodes in MySQL Cluster

I running mysql cluster in windows 8.1 on 3 machines 2 mngmd 2 sql node 3 data nodes in the first machine I tried to connect MySQL server with localhost and tried to put my old database it ...
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1answer
161 views

What permissions do I need to grant on service accounts on SQL root path when relocating?

During a Win2012 with SQL Server 2012 two-node cluster installation, I accidentally set the system root to be the mount point volume hosting folders for the various attached LUNs for the system and ...
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1answer
1k views

what is the right way to restart a mariadb galera cluster?

I am trying to restart cluster. I have two problems in stopping cluster and starting cluster In stopping cluster, I follow the instruction ...
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1answer
269 views

MongoDB replica set - no election after primary node failed

For testing I killed the primary node of my two-node replica set while the cluster was under heavy write load. I was expecting the secondary node would take over after a few seconds, but this isn't ...
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1answer
326 views

SQL Server 2012 Install error “The instance selected for installation is already installed and clustered on computer…”

I am trying to setup a new environment for SQL Server 2012 AlwaysOn. I inadvertently used some SQL Server 2008 config files initially to do the installs but ran into too many problems. I un-installed ...
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34 views

Understanding flow control in MariaDB Galera Cluster?

I am not clear how node state changed. What is the different between node state: JOINED, SYNCED, DONOR/DESYNCED, CLOSED, DESTROYED. These are all state I see in log. I am using MariaDB Galera Cluster ...
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1answer
150 views

Perfmon and SQL Server Clustering

I'll be going onsite to run some performance tests for a client. They have a Windows Failover Cluster, which has a clustered instance of SQL Server. Let's assume for this post that my client's ...
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2answers
363 views

SQL Server cluster resource won't come online unless its on port 1433

The 2-node SQL Server 2008 R2 cluster works fine until one of the resources got removed. I successfully added it back. However, the cluster is not able to online the SQL Service unless it is on 1433 ...