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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526 views

Multi-Site clustering on Windows 2012 for SQL Server 2012

I am hoping someone can point me in the right direction here. We are trying to do a proof of concept for a 3 node multi-site cluster on Windows Server 2012 R2 for our SQL Server environment. There ...
3
votes
2answers
948 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 ...
3
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1answer
334 views

Does mongodb automatically move small non-partitoned databases to spread read load?

I have a few hundred small databases, each between 0.2GB and 4.0GB in size. These are sitting on a sharded mongodb environment with 10 or so shards. At any one time, only a very small subset of these ...
3
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1answer
901 views

SQL Server Clustering for HA combined with Log Shipping for DR

Has anyone implemented SQL Server log shipping in a clustered environment? Are there any issues or things to consider when implementing this scenario?
3
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1answer
90 views

SQL Server Clustering - Active/Active or Active/Passive?

What is the logic of the Active/Active cluster vs Active/Passive cluster? I have searched a lot and read lots of documents but have not found the answer. In active active cluster can I have 1 ...
3
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1answer
47 views

Keeping service up while taking drive offline in clustered instance

I have clustered instance with two (2) data drives on it. Drive J has around 50 databases on it and drive K has about 15. One of the system administrators was trying to increase the size on K by 20 GB ...
3
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1answer
560 views

Complete Failover Cluster Failure SQL Server 2012

We have experienced a full cluster failure on our 3 node cluster running SQL Server 2008 R2 with 7 SQL Server instances. It started when we rebooted one of the nodes and it returned an error: Node ...
3
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1answer
182 views

sql server active active configuration with same database names

I have a SQL Server 2008 Enterprice in a clustered environment and in active-active mode. By active-active mode i mean that both instances are active and serving requests to their databases. ...
3
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1answer
2k views

Event 4104, MSDTC Client 2

I am using Idera SQL Diagnostic Manager to monitor a Windows Server Failover Cluster with two SQL Server 2008 R2 clusters configured to run with one SQL Server cluster on each node. It just started ...
3
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1answer
78 views

Can SQL Server 2012 FCI have multiple names?

Is it possible to have multiple names for the same SQL Server Failover Cluster Instance (virtual server)? IT has a naming convention they like, but it hard codes the Windows cluster name into the SQL ...
3
votes
2answers
100 views

SQL SERVER 2014 Standard - High Availability Listener solution

The company has SQL Server 2014 Standard licenses and we're standing the servers up in a VMware environment. My initial plan is to create 2 instances on each DB server and run Instance1 on SQL1 as ...
3
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2answers
281 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: https://www.dropbox....
3
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1answer
3k 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 ...
3
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2answers
338 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 ...
3
votes
1answer
2k views

Does it make sense to run a cluster of database servers in docker containers?

I'm currently looking into setting up a database cluster (MySQL Galera or Percona) but I have only 2 machines. However, according to many sources I've read (This article from the Mariadb KB), the ...
3
votes
1answer
478 views

Can you upgrade a single SQL Server 2008 Failover Cluster Instance to SQL Server 2012?

Or do you have to upgrade every FCI on the Failover Cluster? The documentation doesn't seem to be clear. We have a 7 instances on a 3 node cluster. We want to upgrade only one of the instances from ...
3
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1answer
3k 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 ...
3
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1answer
476 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 ...
3
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1answer
1k views

SQL Server 2008 Cluster Across Two VMWARE Hosts

Vmware ESX 5 from a Vcenter Two Windows 2008 R2 VMs I am attempting to setup Failover Clustering using two VMs from within a Vcenter. Each virtual machine resides on a seperate physical host ...
3
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1answer
412 views

MySQL licensing [closed]

I have looked at a few questions posted in stackoverflow http://stackoverflow.com/questions/225987/can-someone-explain-mysqls-license-and-what-it-means-to-closed-source-developme http://...
3
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1answer
841 views

Dual management node for mysql clustering

I currently have mysql cluster setup and running. Here is my current setup: 1 - management node 2 - data nodes 2 - mysql nodes I wish to incorporate a failover for the management node. The ...
3
votes
1answer
289 views

SQL Server Cluster Failover Making DB Inconsistency Error

I encountered the following DB tables inconsistency error whenever I do a cluster 'move' over from Server-A to Server-B and then do a DBCC CHECKDB on the database in Server-B: SQL Server detected ...
3
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0answers
65 views

Read replica setting giving error “No candidate servers found”

I am running my website with Laravel 5 + MongoDB. I am using mongo cluster to speed up data read and write, and to lower CPU usage of the mongo server. I have set up the replica like this: 10.0.1....
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0answers
21 views

Cluster of Clusters (Not using MySQL-Cluster)

I'll start with an apology, I'm an Ops guy at heart, not a DBA, so I may use the wrong terminology, not in an effort to annoy, merely because I don't know any better. OK, that over with, on to the ...
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0answers
74 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 ...
3
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1answer
2k 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 ...
3
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0answers
2k views

MS SQL Server 2012 Failover Cluster connection issue

I was about to give up with this but I'll give it a go here if anyone can help. I've set up a fail-over cluster SQL Server with 2 SQL nodes, Domain controller and file witness. All seems to work fine,...
3
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1answer
165 views

Distribute MySQL in different cities?

We have our main MySQL server in city A. We have the bulk of our customer service staff in city B. The staff are complaining that the connection is too slow to the server. The options are: Have them ...
2
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2answers
850 views

Experience using ScaleArc in test or production?

Has anyone had any experience using ScaleArc? My CTO has asked my thoughts on it, and I have seen no information out there regarding real-world experiences.
2
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1answer
1k views

TempDB on Solid State Drives on SQL Server Cluster

Can solid state drives be used for the TempDB on a SQL Server failover cluster if they are local drive on both machines? It is supported in 2012 but our cluster is a SQL 2005. The application that it ...
2
votes
1answer
607 views

Restarting SQL Server Agent on a cluster installation

I've just enabled the mail profile in SQL Server Agent and I need to restart the service for it to take affect but the Agent is running as part of a SQL Server cluster and I don't want the cluster ...
2
votes
2answers
6k views

Creating High Availability Cluster with PostgreSQL

I am new to database design. I have a task to create a high-availability cluster. I Googled a lot, however I haven't found any good way to do this on PostgreSQL. Where should I start and what are ...
2
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1answer
2k views

Syncing two (or more) PostgreSQL 9.1 clusters

This question assumes the use of PostgreSQL 9.1. Say I have two PostgreSQL database clusters. Each cluster contains three PostgreSQL servers. A master, a slave synced via synchronous replication and ...
2
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2answers
642 views

Can I implement clustering with just 2 servers and one NAS?

I have the following architecture, it consists in only 2 servers, connected to a NAS. I'm having trouble in implementing clustering because I can't have a domain controller in any of them (if I do ...
2
votes
2answers
23 views

SQL Server 2014 - Add Node inherits wrong configuration

I'm setting up a simple 2-node failover cluster with SQL 2014 on Server 2012 R2 in Core mode (no GUI). I have the cluster configured with identical machines, and I have the first node configured and ...
2
votes
1answer
47 views

Sql Server Cluster with multiple nodes

Does it make sense to think about a failover cluster configuration where less than 50% of all included nodes are standby? For example instead of setting up 4 clusters with two nodes each where one is ...
2
votes
1answer
143 views

Can't recycle the ERRORLOG - error 17049

When we attempted to run sp_cycle_errorlog we get the following: Msg 17049, Level 16, State 1, Procedure sp_cycle_errorlog, Line 9 Unable to cycle error log file from 'G:\SQL_DATA1\MSSQL10_50....
2
votes
1answer
74 views

Is it possible to have a SQL Server cluster with Hadoop?

I know how Hadoop works. Is there any possible way to have SQL Server run under Hadoop to build a cluster based on SQL Server and not Drill or Hive. Just a wild question. Any good tutorial/...
2
votes
1answer
111 views

SQL Server (2014) Failover Cluster Performance with many databases

We are considering implementing SQL failover clustering and I have a question about how SQL Failover clustering works with regards to performance. Specifically, we would have about 1000 dbs mounted ...
2
votes
2answers
3k views

SQL Server 2008 upgrade to SQL Server 2012 on a cluster

I have a Windows 2008R2 2 node cluster with SQL Server 2008 clustered. How do I prevent the cluster from failing over while I am applying the SQL Server 2012 to the alternate node first? Any pointers ...
2
votes
1answer
6k views

What operating systems are certified for Oracle 11gr2 RAC?

How can this information be found?
2
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1answer
172 views

The right way of starting up a Galera Cluster

I am confused about the bootstrap process of MariaDB Galera Cluster. Let's say we have 3 nodes of a MariaDB Galera Cluster, working and functioning normally on CentOS6/7. However, at some point we ...
2
votes
1answer
120 views

Change port number for SQL 2012 Cluster

I have been trying to change the port number of a SQL 2012 cluster with little success. I had thought that I could just do this the same way as normal through configuration manager however, even with ...
2
votes
1answer
376 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 mariadb-5.5.41-2....
2
votes
1answer
116 views

Temporarily splitting a SQL Server cluster

I currently have a pair of database servers up and running separately, but with the same structure and (hopefully) the same data on both of them. The applications that utilize the data from these ...
2
votes
1answer
656 views

When changing startup parameters on a cluster, does each node have to be updated manually?

When moving a SQL 2005 instance to new disks on a two-node Windows 2003 cluster, I changed startup params on the active node to reflect the new paths for the master DB files and error logs. I ...
2
votes
1answer
960 views

Moving DBs (including System DBs) to new LUNs on a single node cluster

We have a single node cluster (SQL2K8 R2) currently utilizing storage on our old SAN. We'd like to migrate to storage on the new SAN without rebuilding or moving the user DB. The infrastructure team'...
2
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1answer
196 views

Data usage increases initially when reorganize partition mysql cluster

In my MySQL cluster, the data usage of 4 data nodes is approximately 77%. I added a new data node online, and attempted to reorganize partition to redistribute data among all data nodes. But before ...
2
votes
1answer
663 views

AlwaysOn Availability Groups: Confusion with some concepts

In Sql Server 2012, I am trying to install Failover Clustering to configure AlwaysOn Availability Groups. When I run Cluster Validation test wizard, it comes back with a lot of errors. One of them ...
2
votes
1answer
2k views

How many database licenses do we need for setting 2 servers (nodes) into a cluster?

Suppose we have a server that has only 1 CPU with 1 core, so we need 1 Oracle database license for installing a database into it. Now, if we would need to add a second server, combine them into ...