15
2017
Setting up Always ON Availability Group in Multi Subnet Cluster – Recommendations
While planning to configure always on availability group for first time on a multi subnet cluster found following use articles, it provides clear picture in terms of design and architecture, our requirement was to build SQL 2012 cluster on DC1 along with a reporting standalone SQL instance in same DC1, along with it, we want to have DR solution in DC2 where two standalone SQL instances are present on their respective server, to achieve this […]
3
2017
Windows Cluster Asymmetric Disks – In Always ON Clusters
Starting Windows 2012, Windows cluster supports asymmetric disks which is required for Cluster participating in Always ON technology hence is a useful concept to be aware of, http://www.sqlserverfaq.net/2012/09/16/when-do-we-need-asymmetric-storage-with-alwayson-fci-and-availability-storage/ https://social.technet.microsoft.com/Forums/windows/en-US/493bf438-eb9d-405c-81c5-42aaa31eef8a/configure-asymmetric-storage-for-crosssite-windows-failover-cluster?forum=winserverClustering
15
2013
[sqsrvres] CheckQueryProcessorAlive: sqlexecdirect failed
Found SQL Server 2005 SP4 CU3 A/P failover cluster SQL services are stopping and starting several times in interval of 30mins to 1 hour. Following errors are found, Application Log Errors: [sqsrvres] printODBCError: sqlstate = 08S01; native error = 0; message = [Microsoft][SQL Native Client]Communication link failure [sqsrvres] CheckQueryProcessorAlive: sqlexecdirect failed [sqsrvres] OnlineThread: QP is not online. [sqsrvres] printODBCError: sqlstate = 08S01; native error = 2746; message = [Microsoft][SQL Native Client]Communication link failure [sqsrvres] […]
14
2013
SQL SERVER 2005 Resource Fails to come online on cluster after SQL Resource removed and re-added in cluster group
In my case System admin accidently deleted SQL Server 2005 SQL Service resource from SQL cluster group (when trying to remove a disk from cluster) and re-added again but after re-adding SQL server failed to come up and following error noted in SQL Error log, ———– Error: 26054, Severity: 16, State: 1. Could not find any IP address that this SQL Server instance depends upon. Make sure that the cluster service is running, that the […]
1
2012
sqlstate = HYT00; native error = 0; message = [Microsoft][ODBC SQL Server Driver]Timeout expired
Error in windows event logs: [sqsrvres] CheckQueryProcessorAlive: sqlexecdirect failed [sqsrvres] printODBCError: sqlstate = HYT00; native error = 0; message = [Microsoft][ODBC SQL Server Driver]Timeout expired —————————- Suggestions from MSDN forum link: Reference link: http://social.msdn.microsoft.com/Forums/en-US/sqldisasterrecovery/thread/e5b8d938-e529-40f5-bdaa-601a8f6d7aca/ From the error it looks like there was issue with your network. Make sure you have a dedicated Heartbeat Network configured and that it is designated as such in Cluster Administrator. The public facing network can be configured for both Public […]
17
2012
MSDTC and SQL Server 2005 Clustering
While searching for questions, Why MSDTC is required, in which it needs to be configured, is it must for SQL Clustering, etc. Please find below the analysis done by going through several forums and msdn articles,
8
2012
SQL Server 2008 and R2 Cluster Best Practices
http://blogs.msdn.com/b/pamitt/archive/2010/11/06/sql-server-clustering-best-practices.aspx Read about this in above article, few highlights to remember,
18
2012
What is Active/Active Cluster means in SQL Server World
Source: http://social.msdn.microsoft.com/Forums/en-US/sqldatabasemirroring/thread/b6787cbc-e165-4730-9fba-7898af1716a6/ MSCS (Microsoft Cluster Services) is not a load-balancing product, it is simply a high-availability solution. Load balancing does not come in to play at all with clustering a Sql database…the term Active/Active seems to imply that this would be the case, which is why we typically try to refer to them as Multi-instance clusters now instead of the Active/Active label. Active/Active in the MSCS world basically means that you have 2 independent Sql […]
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