SQL 2012 :: AlwaysOn Two Secondary Replicas
Apr 14, 2014While configuring SQL Server 2012 Cluster with Always on, why do we need two secondary replicas.
The attached link will describe the actual query. [URL] ....
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SQL 2012 :: Does Secondary Replicas In AlwaysOn Have To Reside In Windows Cluster Servers
Sep 18, 2014I 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?.
View 6 Replies View RelatedSQL 2012 :: AlwaysOn - Readable Secondary Option
Aug 21, 2014In 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.
View 0 Replies View RelatedSQL 2012 :: AlwaysOn - Readable Secondary Options
Aug 21, 2014In 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?
SQL 2012 :: AlwaysOn Secondary Replica - Resolving State
May 21, 2013I 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?
SQL 2012 :: Clustering AlwaysOn - Primary And Secondary Replica
Apr 11, 2014Looking for info on ole/requirement of primary and secondary replica under SQL Server 2012 AlwaysOn.
View 4 Replies View RelatedSQL 2012 :: AlwaysOn Secondary Node Slower Than Primary
Oct 3, 2014I 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
SQL 2012 :: AlwaysOn Secondary Database In Restricted Mode?
Jun 27, 2015Secondary 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..
any other options or am I missing anything?
MCP,MCDBA(SQL 2000),MCTS(SQL 2005),MCITP(SQL 2005)
SQL 2012 :: Failover On 2 Servers AlwaysOn AG With Read-only Secondary Replica
Mar 28, 2014What 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?
SQL 2012 :: VLFs On AlwaysOn Primary Replica After Log Backup From Secondary
Aug 6, 2014I 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?
SQL 2012 :: How To Transfer Login To Secondary Server And Assign Same Permission To Secondary DB
Jan 24, 2015i 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 ?
View 2 Replies View RelatedSQL Server Admin 2014 :: AlwaysOn Secondary Down -> Whole Cluster Goes Down
Oct 25, 2015We 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!)
SQL Tools :: Adding Secondary Data File In AlwaysOn?
Jul 27, 2015how to add the Secondary Data file to the Database that is a part of the Always on Availability on SQL Server 2012.
View 3 Replies View RelatedRecovery :: AlwaysOn DB Going Into Restoring State On Secondary Server
Jun 22, 2015I 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.
Recovery :: AlwaysOn Secondary Operational State Unknown
Sep 30, 2013I 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.
SQL Server Admin 2014 :: AlwaysON Secondary Full Backup?
Nov 12, 2014Recently I have faced one DBA interview, below is the question they asked me.
" Does AlwaysON secondary replica support Full backup, if it is not why"?
I know AlwaysON secondary replicas support only copy_only and tlog backups, why they wont support full backup?
Recovery :: AlwaysOn Listener - Force Connection To Secondary For AD Group
Nov 6, 2015I 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?
View 6 Replies View RelatedSQL 2012 :: Secondary Replica In AG
May 27, 2015in my secondary server the database which is in restoring state , when i checked in always on dash board "This secondary database is not joined to the availability group" ,
View 3 Replies View RelatedSQL 2012 :: Load Log File To Secondary DB
Mar 11, 2015I am after T-SQL code which will simply load the next T-log backup file from a network share folder to a warm standby db on a secondary server.What is needed is a Third server (server x), to participate in log shipping (MULTIPLE TARGETS).
Primary SERVER (SERVER A)
Secondary SERVER (SERVER B) Log shipped to via GUI.
THIRD SERVER (SERVER X) which will contain the same log shipped db from server A.
This will simply restore the logs from a network share to keep the db up to date.
SQL 2012 :: AG Making Secondary The New Primary
Sep 23, 2015"If we fail over a SQL AG group on a failover cluster from one node to another making the secondary the new primary, is there any reason why we would have to fail it back over to the old primary node?"
View 2 Replies View RelatedSQL 2012 :: Slow Backup On HA Secondary
Nov 2, 20152 Boxes in HA, identical hardware (VMs) and both utilising identical storage systems (Nimble SANs).Was needing to do a copy only backup of a few databases for an escrow environment we have, so decided to perform this on the secondary box.Small ~10GB ish database first, seemed to be really slow, so opened resource monitor and noticed that disk read / write was getting limited to about 15MB/s so took a little while (the big one is over 1TB)
Tried this again on the primary it was done in seconds disk rate in the order of 250MB/s (same settings re compression etc).. I decided to make a copy of the backup file on the secondary, the copy disk to disk went in the region of 150MB/s , so it appears that SQL Server is the bottleneck?
SQL 2012 :: Create Secondary Database On The Server?
Dec 12, 2014How can I create secondary database on the server i.e. .ndf file?
View 2 Replies View RelatedSQL 2012 :: Connecting To Readable Secondary With SSRS
Dec 21, 2014I have been working with a BI colleague to access the readable secondary through SSRS. For some reason it keeps complaining that ApplicationIntent is not recognized keyword. I am starting to think it's something to do with the driver for SSRS.
View 1 Replies View RelatedSQL 2012 :: Dump Every 1 Minute In Secondary Replica?
Jun 9, 2015SQL is generating dump every 1 min with error
EXCEPTION_ACCESS_VIOLATION reading address 0000000000000020 at
Server is running SP2 CU2.
Replication :: Remove Secondary Available Replica From 2012?
Oct 14, 2015Environment:-
Windows 2012 R2,
SQL 2012 (Primary Replica)
SQL 2012 (Seondary Replica)
SQL 2012 (Secondary Replica over WAN site)
There are database replicating on three SQL servers. WAN line is having performance issue because of limited bandwidth I have to remove SQL secondary replica over WAN site temporarily and add it again later when the WAN line is upgraded with between bandwidth What is the best practice to remove secondary replica and replicating database and add later from SQL management studio without interruptions on databases?
SQL 2012 :: Scramble Data While Inserting Onto Secondary Table
Sep 24, 2014Do we have any way to insert,update,delete data from one table and update the changes onto second table. Also, while updating records into second table, can the data be encrypted.
I tried using view and it can insert, update, delete without any issues. But if i tried to encrypt any fields after inserting data into view, I am unable to do it.
For ex:
Table A:
EMPID LNAME FNAME
1 ABC DEF
2 DCE SKL
3 CKL DOP
Expecting output: by scrambling Lname FILED
Table B - vIEW TABLE
EMPID LNAME FNAME
1 CBD DEF
2 ECD SKL
3 LKC DOP
Tried below methods
CREATE Tableb_vw ON TableB
Instead of Insert
AS
Begin
update TableA
set Lname = (
--UserName = 'User' + substring(convert(varchar(32), UsersTrID), 1, 8)
SELECT REPLACE(LEFT(Lname, 2), '''', 'Z') AS LNAME)
FROM TableA
end
What I would like to get:
1. Can we update base tables and encrypt second table data while inserting or updating data
2. If not supported using base tables, can we do using views to encrypt view data [Some fields]
SQL 2012 :: AlwaysOn Pending Changes
Aug 18, 2014How to find the pending transactions to be applied on secondary in Always On? Can i get those details from dashboard?
View 2 Replies View RelatedSQL 2012 :: AlwaysOn A/G Across Two Clusters
Oct 22, 2014We are looking to setup an AlwaysOn A/G between two SQL instances across two SQL clusters - one cluster has two nodes the other has three nodes.
Is this possible using WSFC? Does the A/G wizard just handle this?
SQL 2012 :: Log-shipping Secondary Server Is Out Of Sync And LSRestore Job Failing
Jun 3, 2015I checked the server and found that LS restore job failing and Backup and copy jobs running fine without any issue. and also observed that Copy folder the trn file existing on secondary server. i try to restore trn file im getting the error. and observed that last log backup file that it restored at the secondary database on May2nd,2015.
2015-06-02 12:25:00.72*** Error: The log in this backup set begins at LSN 761571000000022500001, which is too recent to apply to the database. An earlier log backup that includes LSN 721381000002384200001 can be restored.
From Restore job histort details below.
Message
2015-06-02 12:25:00.72*** Error: The file 'xxxx\_20150530104503.trn' is too recent to apply to the secondary database 'database'.(Microsoft.SqlServer.Management.LogShipping) ***
2015-06-02 12:25:00.72*** Error: The log in this backup set begins at LSN 761571000000022500001, which is too recent to apply to the database. An earlier log backup that includes LSN 721381000002384200001 can be restored.
RESTORE LOG is terminating abnormally.(.Net SqlClient Data Provider) ***
2015-06-02 12:25:00.73Searching for an older log backup file. Secondary Database: 'database'
2015-06-02 12:25:00.73*** Error: Could not find a log backup file that could be applied to secondary database 'database'.(Microsoft.SqlServer.Management.LogShipping) ***
2015-06-02 12:25:00.74Deleting old log backup files. Primary Database: 'database'
SQL 2012 :: Failover - Secondary Server Acting As Primary Role
Jul 20, 2015In my environment always on is there. Today I observed that primary server fail over to secondary server .now the secondary server acting as primary role.
Can I know when is fail over is happened and who did the fail over. Is there any script to find this?
SQL 2012 :: Backup Setup With AlwaysOn?
May 13, 2013I'm setting up my first pair of Sql 2012 servers using AlwaysOn. I set up backups to run on the primary and I understand that you can set up backups to run on both the primary and secondary servers but the secondary will fail. Is there a way I can stop the secondary server from sending out error messages about failed backups? Is it possible to script it so that the server looks at whether it's primary or secondary and turns on or off alerts based on that?
View 8 Replies View RelatedSQL 2012 :: AlwaysOn With Clustered Disks
Mar 13, 2014I am trying to build the 2 node 2 clusters with the AlwaysOn.
Here isthe landscape.
2 nodes PROD failover cluster (running once instance)
2 nodes DR failover cluster (running 2 instances - DR and PRE-PROD)
Both clusters are in different geographies.
PRE-PROD can be editable. So out of scope of Always On.
One instance on PROD -> DR of the other box. [Want to achive thru AlwaysON]
Now my Question:
1) Do i need to have all the 4 nodes in same failover cluster group? If yes, then this would become MultiSubnet cluster Or Is there any way those 2 diffrerent failover clusters (one DR and one PROD) can be part of AlwaysOn.
2) Can i use the clustered disks as in the above landscape for always on?
SQL 2012 :: Creating 2 AlwaysOn Clusters For 1 App
Apr 11, 2014We have 2 SQL 2012 servers. Our application has 2 databases. We are creating an AlwaysOn cluster. Is it good to create 2 AlwaysOn clusters to have 1 database primary on one of the servers and the other database primary on the other server?
I have been asked if it is possible to have one database running on one server and the other database on the other server. Is this possible without creating 2 separate AlwaysOn clusters?