Questions tagged [clustering]

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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623 views

Repmgr: Error to promote Standby Cluster to Master Cluster in failover

I maked the configuration of the failover system based in Repmgr, but i don't haved success to promote the Standby Cluster to Master Cluster in case of failover. Following my configurations, this ...
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1answer
646 views

HA PostgreSQL installation using patroni and pgbouncer

I'm not having a problem yet, just searching for advise I want to build installation of PostgreSQL on 3 nodes using patroni: master and 2 standbys (for failover only). There are PostgreSQL and ...
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1answer
242 views

Cannot start MySQL Cluster Management Service

Could not determine which nodeid to use for this node. Specify it with --ndb-nodeid= on command line. This is what EventViewer is saying
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210 views

Automatic MYSQL failover

We have a wordpress environment however this is not a wordpress question. Our scenario is that front Ends connect to a MYSQL backend (MYSQL VM1) which is replicated to a backup vm (MYSQL VM2). The ...
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1answer
391 views

Database Engine and SSISDB architecture advice

I'm seeking some architecture advice involving the database engine and Integration Services components of SQL Server 2017. We have an existing SQL Server environment which is due for an upgrade and ...
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1answer
18k views

How many IP numbers are there for a SQL server active active cluster setup also a active passive setup?

How many IP numbers are required for a SQL server active/ active cluster setup also what in the case of an active/ passive setup? Correct me if I am wrong 2 for private network 2 for public network ......
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43 views

Query on SQL HA/DR

DC1: we have two DB servers (DB1 and DB2) on top of WSFC DC2: 1 DB server (standalone DB machine). I have configured SQL Always-On on DC1 from DB1 to DB2. Now I have to sync/replicate data from DC1-...
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2answers
4k views

Lease Timeout VS HealthCheck Timeout - AlwaysON

After all the reading this is what I understood. Is it correct? LeaseTimeout is a simple heartbeat between SQL Server resource DLL and the SQL Server instance. HealthCheck Timeout is related to ...
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16 views

Multiple Failover Clusters SQL Server 2016 Standard

My requirement is configure SQL Server 2016 (Standard) Failover Clustering (Active/Active) I'm planning to install it on each node, does SQL Server Standard Edition supports multiple Failover Cluster ...
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1answer
415 views

Postgres-XL adding GTM Proxy seems to do nothing

I've set up a Postgres-XL cluster using this recipe: GTM: hostname=host1 nodename=gtm Coordinator: hostname=host2 nodename=coord1 Datanode1: hostname=host3 nodename=datanode1 Datanode2: hostname=...
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146 views

How to setup a SQL Cluster between 2 sites in active passive mode without shared storage

we need to install SQL at 2 sites, 1 primary and 1 DR. We don't to pay for license for the DR and need to know how will we setup a SQL cluster/replication/alwayson/bag or any other method that will ...
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2answers
38 views

Query on SQL Server Always On

DC1: (servers are in WSFC): DB_Server1 and DB_Server2 DC2: DB_Server3 DC1 and DC2 servers are located in different geo locations. Is it possible to configure SQL 2017 Always-On/SQL 2017 Distributed ...
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45 views

Lost data in bulk Insert on Galera Cluster

I have a 2-node fresh Galera Cluster in 2 DCs. I Import a 3GB dump into one node and the other starts to sync. After importing dump, I check the size and rows on both nodes and they are not equal. ...
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27 views

InnoDB Cluster Error

Is anyone encountered this error "Unable to join the group: peers not configured" in creating Innodb cluster? or I need to configure group replication first? I follow the documentation step by step ...
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2answers
632 views

FCI with Alwayson Availability Group (Asymmetric Storage)

I am trying to setup a demo environment where I have a windows cluster with 3 nodes. Node 1 will be standalone sql server and will be the primary replica. Node 2 and 3 will be in a Failover cluster ...
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85 views

SQL Server Cluster Install on Mount Point

I am trying to install a Failover cluster instance and I ran into the following issue: Updating permission setting for folder 'C:\ClusterStorage\PRODSQL\SQLData\MSSQL14.PRODSQL\MSSQL\DATA' failed. ...
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2answers
204 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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3answers
467 views

SQL Server: Multiple Availability Groups, one cluster, how do I keep the primary cluster node as primary?

I have a database server setup where there are three SQL Server database instances set up on three nodes of a Windows Server Failover Cluster (WSFC). The sysadmin, who is responsible for the ...
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271 views

Need to maintain transactional consistency of the data across both servers, need to achieve these goals without manual intervention

I got this question about MS SQL Server 2012 administration, two production servers in the same data center. You need to ensure that database remains available if a catastrophic server failure or a ...
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1answer
75 views

MySQL Create Index Semantics: Clustered vs. Nonclustered?

I'm new to databases and specifically MySQL, so pardon me if this is a simple question. I'm trying to make sense of what happens with MySQL when I call CREATE INDEX. I know that primary keys are ...
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1answer
3k views

MongoDB replica has no primary

I have an existing MongoDB setup (part of a Graylog installation) where I'm attempting to configure a replica set with a primary, secondary and arbiter. I had the primary and arbiter configured ...
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1answer
239 views

Selective synchronization between distributed clusters

What's the best practice for the following scenario: I've an embeded device with a single, lightweight database; a powerful server with a cluster; a cluster in the cloud. I'd like to synchronize the ...
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1answer
222 views

MySQL Cluster - Data Node Restarting when database corrupt

I initially Have MySQL cluster with 2 Management and 2 Datanode. I added 2 Data node online and redistribute its data. So my current cluster setup is 4 Management Node + SQL and 4 Data node. There ...
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1answer
221 views

MySQL replication with DRBD - Can we use Old master as slave after failover?

I have configured MySQL replication with DRBD, and now its working fine, Incase if something happens to my master then Slave will promote as Master. My question is after the failover(lets assume ...
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165 views

RESTORE VERIFYONLY FROM DISK is failing

We are having WSFC(Windows Server Failover Cluster) configuration for one of database server and from last few days, backup of one of the database is failing. Sometime backup itself fails whereas on ...
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1answer
531 views

I would like to understand better the difference between “sql server stand alone” and “sql server failover instance”

AS these question asks: Are "Always On Failover Cluster Instances" and "SQL Server Failover Clustering" the same thing? Shouldn't Windows Server Failover Clustering already ...
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1answer
500 views

Why configuring automatic failover for SQL availibility group feature on sql failover cluster instance not allowed

I have set up an availability group where a primary is standalone server and replica is SQL failover cluster. This setup allows me only manual failover and when ever I try to set it automatic in FCI ...
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2answers
57 views

SQL Server AlwaysOn and FailoverCluster

We have one project which has Failover Cluster with two nodes and one standalone server in AlwaysON. For example: Project 1 Node1 (ip:192.168.100.101) Node2 (ip:192.168.100.102) in Failover ...
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159 views

SQL Server 2016 SP2 CU9 - WFC Failover failing

I have updated my SQL Server 2016 on one of my Windows Failover Cluster nodes successfully. When I attempted to failover one of my SQL instances onto the newly patched node, SQL Server service fails ...
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452 views

Availability group/Failover cluster failing without signs of errors

So this is the second time it happens. Specs: SQL Server 2014 Enterprise Failover Cluster with 2 nodes No Quorum ( I Think ) Event Viwer has some events as follow: The information one always ...
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2answers
494 views

SQL Server Always-On Availability Groups LeaseTimeout

One of my AG environments encountered the error The lease between availability group XXXXXXX and the Windows Server Failover Cluster has expired. A connectivity issue occurred between the ...
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3answers
2k views

SQL Server Cluster: There is no SQL Server failover cluster available to join

I have set up a SQL Server 2016 Standard cluster (Cluster-SQL) on node 1 (Cluster-Node-1) which is appearing in Windows Failover Cluster manager without issue. When I attempt to add a second node (...
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1answer
16 views

Can I setup several mariadb clusters, each for a schema

I'm planning to use MariaDB Cluster, as a way to sync several databases from different peripherals (raspberry pis). The peripherals don't share data, but all data should be shared with the main ...
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1answer
608 views

Migrate from SQL Server 2016 Failover Cluster to Availability Groups

We have a 16 node SQL Server 2016 failover cluster with around 20 SQL Server instances and total number of databases around 600. Since we are upgrading our hardware to Hyper-Converged infrastructure ...
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1answer
212 views

Availability Group Clustering - Cluster Group Preferred Owner

We have a three node AG. Two nodes in a local data center, one in a different subnet DR site. Am I correct that the Cluster Name should have two IPs, just like the listener? Also, is there a way to ...
5
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1answer
13k views

Always On Failover Clustering vs Always On Availability Groups

I have some concerns over my understanding of SQL Server Always On. Kindly can you correct me (conceptually) where needed: Always On Clustering and Always On Availability Groups are 2 separate ...
5
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2answers
2k views

Failover Cluster Diagnostic Logs

I know there must be a simple answer to this question, but I cannot find it anywhere. Our SQL 2012 FCI have SQLDIAG .XEL files in their MSSQL\LOG folder. In some instances, these files are often ...
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1answer
379 views

Availability Groups automatic failover is not so automatic

Behavior when I stop SQL Server Service : The availability group fails (resolving on SECONDARY SQL SERVER and fail state on Cluster management). SQL Server does not connect with the Cluster ip (I'm ...
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3answers
577 views

Do I need “New SQL Server Failover Cluster installation” to run Availability groups with manual failover?

I'm trying to set up a test environment here to learn more and apply this on our production environment. I've created and installed the Windows Cluster with CLuster manager. Now I'm going to install ...
3
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1answer
27k views

Cluster network name resource 'Cluster Name' failed registration

I have a fail-over cluster set between two Windows Server 2016 machines, and I'm seeing errors regarding the DNS record, both for the cluster itself and for any listener I try to add in SQL high ...
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0answers
20 views

Neo4j cluster - kubernetes, helm - no load to replicas

I have neo4j in kubernetes cluster deployed via official helm chart, core stateful set works fine, but when readonly replicas are deployed, there is no load to them. Anyone was already solving this ...
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1answer
77 views

remove Analysis service from a SQL 2014 cluster

Is it possible to uninstall Analysis service from a SQL 2014 cluster. I’ve seen that it cannot be done in 2008/12. I’m hoping that this maybe fixed now
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11 views

Cassandara ec2 Number of Nodes and autoscale for increasing 70Gb of Data

I am beginner in Cassandra, I currently have 72 GBs of Data that is growing and i will have approximately 1gbs inserted into database daily. How can i decide number of nodes in the cluster and how ...
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3answers
2k views

Cannot create login on cluster

I have a SQL Server 2008 R2 cluster on Win2008 R2. I am unable to add a login for the service account. Any other login I add to this instance works fine and I have been able to add the same ...
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2answers
22k views

What are the differences between Mirroring and Failover Clustering and when is each one recommended over the other?

What are the main differences between Mirroring and Failover Clustering? What kind of problem each one solves and in what kind of scenarios is each one recommended over the other?
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192 views

Not able to add a node into windows failover cluster

I had two node cluster but due to disk corruption one node was removed. After maintenance when second node came back we tried to add it into the cluster but getting exception. I checked the even log ...
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2answers
105 views

Error in WSFC Role while applying SQL 2016 CU7 in Multiple SQL instance environment

Kindly advise on following error: Cluster resource 'AG1_NAME' of type 'SQL Server Availability Group' in clustered role 'AG1_NAME' failed Based on the failure policies for the resource and ...
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1answer
220 views

SQL Server 2016 Cluster - mail works in alerts; sp_send_dbmail dosen't send in jobs

I upgraded from 2008 R2 to a 2016 cluster [Microsoft SQL Server 2016 (SP1) (KB3182545) - 13.0.4001.0 (X64)]. We have some scheduled emails that happen from the agent that are reporting success as the ...
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1answer
194 views

SQLDIAG File in the SQL log folder

There were few inconsistency issues in our database and this happened because of unsuccessful fail-over of DB server(WSFC), same was asked in this question and is resolved last night after dropping ...
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1answer
67 views

SQL Server takes an hour to fail over to secondary node

I am at a new job, we have a 2008 R2 (SP1) WSFC which hosts SQL Server 2008 FCI. Each node has it's own storage, nodes are 32 core with 32 GB memory (don't ask me why it is configured this way). ...

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