We are planning to built a DR on a different WSFC
We have a server on a WSFC and we need to create a DR that will be on a different WSFC. We will be using Microsoft SQL server 2017 standard edition. We are trying to find out if we can use an...
View ArticleSQL Server AG Automatic and Manual failover detection
I am looking to find ways to detect when a SQL Server AG failovers manually by a user or automatically by the SQL Server.I am in need to of this detection to trigger some post AG switchover logic when...
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Always-on last_harden_time vs last_commit_time
May I know why the last_harden_time is later than the last_commit_time in the sync node.
View Articlebest practices to backup always on cluster databases
Hi guys, i want to migrate a single node server (sql 2016 standard) to 2 nodes cluster with basic availability group. So i know that i can create snapshots on secondary replica server, so i guess that...
View ArticleTest 2014 Always On cluster - applied CU incorrect procedure
Thank goodness I'm dealing with a test cluster - 2014 SP2 CU 10. This is a multi-instance cluster. Two local synchronous replicas, and one remote async replica. I impulsively ran SP2 CU13...
View Articlewhat's the purpose of REQUIRED_SYNCHRONIZED_SECONDARIES_TO_COMMIT
I am just confuse the actual usage of the AG parameter REQUIRED_SYNCHRONIZED_SECONDARIES_TO_COMMIT ?what's the main usage of this ?supposing all the sync_commit nodes are required to complete the...
View Article2014 Always On cluster - applied CU on primary out of order
I have a 3-node, multi-instance Always On cluster is 2014 SP2 CU 10. Two local synchronous replicas, and one remote async replica. I impulsively ran SP2 CU13 executable on the primary. I expected...
View Articletrace flag 3923
Any one know if trace flag 3923 still have to be explicitly added to SQL Server instance 2017 ??...
View ArticleSQL Server Mirroring, witness server requirement.
I'm planning to implement a SQL Mirroring with failover to 1 of my database. I would want to confirm, for a witness server does it need to be in the same spec as the primary & secondary server? Do...
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Event ID 35201 and 35206
What's the difference between these two error? If using the default session timeout 10s. disabling the replication network interface more than 10s will have Event 35201 and 35206However disabling the...
View ArticleDatabase level health detection on system database
My replicas have3 drives D: SYstem databaseE: Data mdfL: Log ldfAnd the AG has enabled "Database Level health detection". I offline the disk D on primary replica.The AG doesn't failover.... , and the...
View ArticleSQL 2017 Always On High Availability logins clear out
I have two Always On High Availability Group environments Dev and Prod. When the systems fail over from node 1 primary to node 2 secondary, the SQL Logins get cleared out. The users are still in the...
View ArticleSQL 2016 Enterprise Availability Group Chaining Question
We are in the process of upgrading a set of servers from SQL2008R2 to SQL2016.The source SRV1 is SQL2008R2 and the target SRV2 is SQL2016. Right now I replicate the data in a single database DB1 using...
View ArticleAvailability Group limits for Sql Server 2017 Standard
Hi,I am trying to figure out what are the limits for AG with Sql Server standard 2017 edition.How many AG can you create or BAG?How many databases in each AG's?How many node can an AG have, Primary and...
View ArticleSQL 2017 HA Architecture
Hi,We are planning to deploy a Single Two Node SQL2017 Ent Edition Always On Availability cluster with all/sufficient local SSD storage on both Nodes.The SQL Always On Availability cluster will be...
View Articledelete data from a read only partition
Hi, our database is partitioned and data older than 12 months goes into a read only partition by the DBA. However, i now have a requirement to start deleting data, will probably be older than 7 years....
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Always-on Cluster : Prevent Failback setting
Hi All. Anyone know why "Allow Failback" is the default values for Always-on AG ROLES ?
View ArticleAvailability Group and Distributed Availability Licensing
I read a document here https://cloudblogs.microsoft.com/sqlserver/2019/10/30/new-high-availability-and-disaster-recovery-benefits-for-sql-server/And I just need the clarification.Fist, they are talking...
View ArticleDo we require clustered DTC for Always on AG on SQL 2017?
Before I get into the question, let me explain what exactly I am trying to do. <o:p></o:p>I have a two-node failover cluster (Windows Server 2016) on VMware and I am setting up SQL Server...
View ArticleHow to apply patch for SQL server Always ON
Always on(SQL server 2016) is configured between four standalone servers Server1,Server2,Server3,Server4. These servers contains one availability Group(AG01) which contains 3 databases. How to apply...
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