SQL 2012 :: AlwaysOn Secondary Database In Restricted Mode?
Jun 27, 2015
Secondary replica database(setup in async mode) of AlwaysON went in "restricted mode" during weekly reindex operation.
So I have tried below steps
1) Executed following statement on the same secondary replica database where the issue exists
alter database <DBNAME> set multi_user with rollback immediate
but it failed with the error saying "The operation cannot be performed on database "dbname" because it is involved in a database mirroring session or an availability group. Some operations are not allowed on a database that is participating in a database mirroring session or in an availability group. ALTER DATABASE statement failed."
2) Primary database is multi_user but still tried following command on primary replia database(thinking it will replicate)
alter database <DBNAME> set multi_user
but no luck. The secondary alwaysON database shows (synchronizing) as the alwaysON is set in async mode but the command doesn't replicate across secondary
so we are left with the only option to re-setup alwaysON but I want to avoid it as database size is huge..
In always on under availability group server name properties can see the option Readable Secondary. In that for secondary server the Readable Secondary Option is YES and for Primary it is Read-Intent. I believe Read-Intent allows only read only connections and YES allows all user connections.
In always on under availability group server name properties can see the option Readable Secondary. In that for secondary server the Readable Secondary Option is YES and for Primary it is Read-Intent. I believe Read-Intent allows only read only connections and YES allows all user connections.
What exactly it means for the primary and secondary?
I have an AlwaysOn Availability group configured between 2 nodes (Synchronous)
Automatic failover was working fine until recently
I can failover between the nodes manually but automatic failover doesn't seem to be working. In my earlier test, I would shut down the SQL Service on the primary and within seconds, the secondary replica would take over. Recently I have performed the same test and the secondary replica enters the resolving state and the DB in unavailable.
I have tried everything here: [URL] ....
The only change I made was changing the availability mode from Synchronous to Asynchronous - Could that be the cause?
I have a SP that runs on the primary in 18 min and 45 min on the secondary( poorly written cursor,trying to fix it).Both machines are Exactly the same.I ran them in the middle of the night when no one was on the Sec. Node as we use it for reporting.
PLE: 7,000+ AVG Disk sec/write below .01 AVG Disk sec/read below .01 CPU below 5% both machines set a max dop 4
What happens when an automatic failover occurs, in a two server AlwaysOn Availability Group configuration, where the secondary replica is configured as read-only?
Will it only allow read-only connections, or will it become read-write and can accept INSERT, UPDATES and DELETES when assigned the new role as Primary?
Is it correct that adding a third server/node, that just acts as passive and should be used for automatic failover, to support true HADR, would NOT need another license .. and that licenses would only be required for the previous Primary and Secondary (Read-Only) replicas?
I was working on a job to send me info each morning about database file free space and was noticing some odd things when looking at the log file VLFs for one of my databases in an AlwaysOn availability group.When I run DBCC LOGINFO on the secondary replica for this database, I get what I expect and most VLFs have a status of 0 (indicating the VLFs are reusable or unused). When I run DBCC LOGINFO on the primary replica, all of the VLFs have a status of 2 (active or recoverable).
Since log backups on the secondary replica in AlwaysOn still truncate the log in the primary replica, I would expect that the VLFs in the primary replica would also be mostly in a reusable or unused state. My log file sizes are the same size on each server and my backups are completing successfully. what might be causing the VLFs on the primary replica to have a status of 2 in DBCC LOGINFO when taking log backups from the secondary replica?
I know now that AlwaysOn feature HAS to be installed/configured on a Windows Clustering environment, BUT the secondary replicas, like the Disaster recovery replica residing in a different Data Center HAS to be also in a Windows Clustering environment or can it reside on a SINGLE SQL Server INSTANCE?.
windows is sql server 2012 64 bit edition and sql server is 2012 64 bit edition.
RAM installed on both server is around 65 gb of which 49 gb is max server memory allocated for sql services on both servers.
database related to reporting services are also in always on group .
We have also configured for reporting services and both are running on their respecting server.
Issue is on primary server reporting service is using almost 7 gb while on secondary it is using 10 gb even when there are 5 reports and its used within offices .
what issue and how to check why ssrs is using high memory..
any query , perfmon counters
reports are randomly used at client side
i have checked memory utilization through task manger..
I am doing a logshipping in sqlserver2000. I have PrimaryServer database A and Secondaryserver A which is already existing. Now if i am trying to establish logshipping with this existing db in secondaryserver it says db A in destination is not in standy mode.
Please help me how to bring the db in standy mode that can be used to do logshipping.
i have created a new login in primary server and provided dbowner permission to primary db.how do i transfer this login to secondary server and assign the same permission to secondary db ?
We had a big issue today during maintenance work in our SQL environment.
So our environment: - 2x SQL Server 2014 Enterprise on Windows Server 2012 R2 (SRV1 and SRV2) -- Both Hyper-V VMs on different Hosts -- Both configured to an Windows Failover Cluster and AlwaysOn Availability Group (AG1) -- AG Listener: AG1_lis -- No shared storage (each Hyper-V Host has its own local storage) -- Asynchronous Mode -- SRV1 is primary, SRV2 is secondary SQL node
What happened? - Shutting down Windows on SRV2 due hardware maintenance - Cluster goes offline, AG1 goes offline -- Error message: "Stopped listening on virtual network name 'AG1_lis'." -- Error message: "The availability group database "DatabaseXY" is changing roles from "PRIMARY" to "RESOLVING" because the mirroring session or availability group failed over due to role synchronization."
Results? - AG1_lis wasn't available for our applications and they stopped working properly because database connection was lost!
I think, I HOPE, this is not the normale behaviour when one node is shutting down (especially the secondary node!)
I noticed that after a SQL AlwaysOn failover, one of the DB in the secondary replica is stuck in Restoring state. The primary replica shows that it is in a synchronized state. These are the error logs from SSMS. How do I trace the cause of the problem?
Error: 5901, Severity: 16, State: 1. Nonqualified transactions are being rolled back in database for an AlwaysOn Availability Groups state change. Estimated rollback completion: 0%. This is an informational message only. No user action is required Error: 18400, Severity: 16, State: 1.
One or more recovery units belonging to database failed to generate a checkpoint. This is typically caused by lack of system resources such as disk or memory, or in some cases due to database corruption. Examine previous entries in the error log for more detailed information on this failure.
The background checkpoint thread has encountered an unrecoverable error. The checkpoint process is terminating so that the thread can clean up its resources. This is an informational message only. No user action is required.
I recently configured SQL Server 2012 AlwaysOn Availability group using two nodes - a primary and one secondary read only replica. The group is residing on a windows 2012 cluster with an smb file share as the quorum. I am able to successfully failover through SQL and through the windows 2012 cluster. When I look at the group dashboard on the primary server and view the Operational state of each node I notice an odd value. The secondary role server is listed as Unknown. I also noticed that the Availability replicas node icons in object explorer are displaying the same icon on the primary server but on the secondary server, the primary server is shown as a server with a question mark.
Am I missing a permissions setting or is this normal behavior.
For example:
ServerA is the primary ServerB is the secondary ServerA lists the servers in Object Explorer as:
ServerA (Primary)ServerB (Secondary) ServerB lists the servers in Object Explorer as:
ServerA ServerB (Secondary)
The primary is never listed a primary on the secondary server. Again failovers are working properly, but I want to be sure I am not missing a setting somewhere.
I have a two node HA Always on group using a Listener. I would like to force a certain AD group to always be forced to the secondry node as they would only ever need to run select statements. If there an easy way to do this without using logon triggers?
In always on docs in msdn they mention only about backup of secondary.. explain the backup of primary or how logs are managed in primary database. My doubt is a normal database in full recovery mode the log file will grow if we didnt take proper log backup,how the same is managed in primary in Always On.
We have a database in an AlwaysOn Availability Group that has gone into a state of Not Synchronizing / Suspect on the secondary.
The reason why this happened is because the secondary ran out of disk space so the log file wasn't able to be written to. The database was set to synchronous mode.
Is the only way to recover from this to do a re-initialization or is there another way to recover?
We are planning to upgrade our production servers from mirroring to alwayson. Our current mirror setup gives the advantage that it can failover a single database.To have a similar setup in alwayson we are probably going to create an availability group per database. Any other disadvantage in this except for the extra initial configuration work?
I've configured log shipping to use for DR purposes. I'm concerned that the physical location of the secondary is mis-reported by SQL Server Management Studio.
Viewing the secondary location (with Studio DB_name Properties Files) shows the path of the primary DB (I expected it to show the path of the secondary).
This SQL command shows the correct/actual paths of both primary and secondary DB's when run on their host servers.
SELECT name, physical_name AS CurrentLocation, state_desc FROM sys.master_files
Is this just cosmetic?
Here is an Example of how the Studio shows the incorrect path for the secondary.
If there is a history kept somewhere of failover events of a database in an AO group? I have 2 replicas with automatic failover and I'm looking for a history of failovers.
I received an alert from one of my two secondary servers (all servers are running 2012 SP1):
File 'E:SQLMS SQL ServerMSSQL11.MSSQLSERVERMSSQLDATAMyDatabaseName_DateTime.tuf' is not a valid undo file for database 'MyDatabaseName (database ID 8). Verify the file path, and specify the correct file.
The detail in the job step shows this additional information:
*** Error: Could not apply log backup file 'MyDatabaseName_DateTime.trn' to secondary database 'MyDatabaseName'.(Microsoft.SqlServer.Management.LogShipping) ***
*** Error: Table error: Page (0:0). Test (m_headerVersion == HEADER_7_0) failed. Values are 0 and 1.
Table error: Page (0:0). Test ((m_type >= DATA_PAGE && m_type <= UNDOFILE_HEADER_PAGE) || (m_type == UNKNOWN_PAGE && level == BASIC_HEADER)) failed. Values are 0 and 0.
Table error: Page (0:0). Test (m_freeData >= PageHeaderOverhead () && m_freeData <= (UINT)PAGESIZE - m_slotCnt * sizeof (Slot)) failed. Values are 0 and 8192. Starting a few minutes later, the Agent Job named LSRestore_MyServerName_MyDatabaseName fails every time it runs. The generated log backup, copy, and restore jobs run every 15 minutes.
I fixed the immediate problem by running a copy-only full backup on the primary, deleting the database on the secondary and restoring the new backup on the secondary with NORECOVERY. The restore job now succeeds and all seems fine. The secondaries only exists for DR purposes - no one runs reports against them or uses them at all. I had a similar problem last weekend on a different database that is also replicated between the same servers. I've been here for over a year, and these are the first instances of this problem that I've seen. However, I've now seen it twice in a week on the same server.
We are using MSSQL 2005 and Log Shipping. After making our secondary SQL server primary, how can we put the secondary SQL server back into standby mode?
We have a reporting database which is refreshed daily from prod backup and later creating new tables/views/indexes as part of the refresh job. Is there a better approach we can implement in sql 2012/2014 for this scenario since we are planning to migrate to sql2014.
Is it possible to put master database to single mode, if yes then whats the procedure. The reason behind the scenario is to restore master database from backup for which its strictly recommended to put the database in single mode. But I m not able to do so.
I need to change the authentication mode from 'windows' to mixed, its a 4-node participating in always-on... Will this brake/impact alwayson in any way? I know I have to restart the sql instance.
