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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Queries running slower on production (failover cluster) than on homologation env [duplicate]

I have a Windows Server 2012 cluster with two nodes running SQL Server 2012 for production and a Windows 2012 single server with SQL Server 2012 for homologation. I just restored the production ...
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28 views

SQL Server Always On Failover Cluster Design

I have two databases. One I'd like to set up in an availability group between two servers (two instances, one on each server). The database is not huge and I'm not expecting it to grow ...
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1answer
54 views

How can I be sure if MongoDB is doing the balance?

I have the following structure: Two Ubuntu 14.04.2, both with MongoDB v3.0.4 instaled. Both in the same LAN. I want to make them work as a cluster. In the first one, that I call "MC1", I run the ...
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1answer
169 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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2answers
692 views

SQL Server Configuration Manager 2012 - unable to set IP All = No

I have a 4-node SQL Server 2012 SP1 cluster, and under Network Configuration -> TCP/IP -> Protocol (tab), I am able to switch Listen All from Yes to No. However, when I hit OK (or Apply), I get the ...
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20 views

Upgrade MongoDB cluster from 2.4.10 to 3.0.4

I have a MongoDB cluster running on 2.4.10 in production. According to the MongoDB docs, I have to do a step upgrade: from 2.4.10 -> 2.6 -> 3.0.4 For rollback we have to do step rollback: from ...
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0answers
21 views

Cluster node upgrade of SQL Server 2008r2 to SP3 Fails when moving resource

I'm trying to update a cluster to SQL Server 2008 R2 SP3. I've installed SP3 on the passive node but when I fail over the cluster it errors when running through it's upgrade scripts. The messages ...
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3answers
76 views

9 node percona xtradb cluster

We are looking to launch a 9 node percona xtradb cluster on Amazon where each ec2 node uses 20k iops disks. I was afraid if a 9 node cluster will work and mostly what I see is 3 node clusters. We ...
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1answer
38 views

MariaDB Galera Cluster without HAProxy, MYSQL Proxy, etc

I'm looking to deploy a MariaDB galera cluster across three servers. However, I've noticed that the documentation often references HAProxy or the like. Does this not cause a single point of failure ...
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1answer
33 views

SQL Server 2014 - Replica Server not available

I'm new to Sql Server and want to install SQL server alwayson clustering on my test environment. I followed the steps by this site: On each node I can connect to SQL Server but why my 2nd node is not ...
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1answer
2k 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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2answers
52 views

SQL Server 2012 SP2 update failure

I have been having failures to install SQL Server 2012 SP2 on a 2-node active\passive cluster. I have uploaded detail and summary logs for the latest run on the passive node here: ...
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0answers
265 views

How to use Blob Storage as shared storage in a Windows Azure Failover Cluster?

In the context of SQL Server 2012 Standard Edition, is it possible to make Azure Blob storage available to a SQL Failover cluster directly as a shared SCSI resource on a Windows Cluster composed on ...
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27 views

Cluster Quorum Voting [closed]

I have a cluster of 4 SQL Servers setup. 2 of the servers are in RackSpace in Chicago. 1 is in Rackspace, in Reston, VA, and one is in our office in Greenville, SC. I want to change the cluster ...
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28 views

grastate.dat with seqno -1 on a healthy cluster. Why?

We use those versions: # rpm -qa | egrep '(galera|maria)' mariadb-libs-5.5.41-2.el7_0.x86_64 mariadb-galera-common-5.5.40-6.el7ost.x86_64 mariadb-galera-server-5.5.40-6.el7ost.x86_64 ...
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1answer
724 views

Configuring Postgres 9.2 streaming replication with Redhat Clustering Suite for High Availability

I'm in the process of configuring PostgreSQL 9.2 streaming replication with Redhat Clustering Suite for high availability. I have 1 master and 1 hot standby configured to replicate the data from ...
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61 views

SQL Server Setup The network path was not found (uninstall node)

We have a cluster with 8 nodes. this instance is installed on 2 nodes S141 (active) and S142 (passive) I want to uninstall with the command: Setup.exe /Action=RemoveNode /qs /INSTANCENAME="SQL16" ...
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1answer
53 views

when can AG primary replica be a different host to WFC primary?

To set up an Availability Group with two servers, the servers both participate in a Windows Failover Cluster. I've seen cases after certain failover modes where the primary IP address in the cluster ...
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1answer
40 views

Sql Server Licensing & Clustering for AlwaysOn

For Sql Server 2014, reading these MSDN link and Microsoft PDF file about licensing, created a couple of questions. For AlwaysOn do we need WSFC or FCI? How are WSFC and FCI different? If we only ...
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0answers
23 views

PostgreSQL Streaming Replication Tools - Windows

Is there any clusterware available for PostgreSQL clusters running on Windows OS? I'm specifically interested in automatic failover and STONITH functionality. I've done a fairly extensive Google ...
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1answer
39 views

SQL Server Failover cluster installation fails `RequireKerberos` to value '1'

Hi I am trying to create a SQL Server Failover cluster. Windows Cluster is configured and working as expected but now when I try to install SQL Server it throws the following error: OS: ...
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2answers
3k views

MariaDB Galera Cluster Replication error, no state received?

I have a very minimal, fresh out of the box setup for MariaDB with Galera clustering. My master node of the cluster is able to run, and is reporting that there is only one node attached to the ...
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2answers
29 views

Multi server single database access [closed]

We have a database server (8 core + 32gb ram + 2tb hdd + gigabit network). SQL Server 2014 Enterprise Edition processor lic. We also have a web server (4 core + 16gb ram, 2tb hdd + gigabit network). ...
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1answer
746 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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596 views

Postgres database zero down time production deployment

I need some idea about how I can deploy a financial application in production environment using PostgreSQL DB with zero down time. I have two servers in Master-Slave design. Currently I am giving ...
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34 views

Failover timeout problem

I'm looking for an additional bit of help with regard to some problems I'm looking at for one of my company's clients. Basically I have two related problems with regard to a 2-node active/active ...
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2answers
2k 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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98 views

Can't connect to an Active Node in an Active/Passive cluster

While being logged into an active node SQL Server 2012 node, I tried connecting to it from within the SQL Server Management Studio but was unable to do so. I tried the fully qualified name and the IP, ...
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2answers
6k views

Understanding two NICs requirement for SQL fail over cluster

I am trying to make an SQL Server 2012 failover 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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1answer
143 views

Can't remove active node from SQL Server 2008 R2 Clustered Instance

I am trying to remove the active and only node from a SQL Server 2008 R2 failover cluster. Everything checks out and then I get this error Final result: Failed: see details ...
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1answer
697 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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31 views

What is the sequence to enable the authentication in mongodb cluster without stopping the service

Assume that the cluster is running with authentication disabled. There are one mongos instance, 3 config servers, and two replication sets. each replication set has 3 mongod instances. My order is ...
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17 views

MariaDB Galera Cluster Deployment [closed]

I am interesting in MariaDB Galera Cluster. I am curious about the following: Can I have multi master setup and to this multi master cluster to set up a separate node to replicate from it (outside of ...
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1answer
65 views

SQL Server Failover Cluster Instance compatible with VMware HA?

Imaginary Setup: Microsoft SQL Server Failover Cluster Instance on virtual machine in an ESX-Cluster. Question: In case of a hardware failure, what will happen with both high availability ...
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1answer
56 views

Restart the active node services without failover [closed]

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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31 views

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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2answers
189 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
27 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
32 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
219 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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1answer
26 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
234 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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97 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 ...
3
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1answer
354 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 ...
13
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2answers
11k views

“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
33 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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686 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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47 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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180 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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131 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 ...