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.
View 2 RepliesLooking for info on ole/requirement of primary and secondary replica under SQL Server 2012 AlwaysOn.
View 4 Replies View RelatedI 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
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?
Secondary server is offline due to a hardware issue and the log files are growing on Primary sever for availability databases. The log drive is running out of space. How can I stop the log growth for the primary databases?
View 4 Replies View RelatedWe 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?
View 9 Replies View RelatedHow to find when (date/time) a database was last removed from AlwaysOn Listener?
Is there any query (DMV) to find the details easily?
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.
View 0 Replies View Relatedhow to check the errors when a database is configured in Always on in sql 2012?
View 1 Replies View RelatedSecondary 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)
I would like to do partitioning one of my client, but that primary database is participating in log shipping.
If I do partitioning on primary, automatically apply those changes on secondary db? if not, what is the way?
Note: I am adding new filegroups and ndf file in different drives on primary database.
I have set up a 2 node availability group to take advantage of using the secondary node for a read-only replica. I actually am having two issues. The first being I can connect to the primary node using the listener dns name and ip address, but no longer can connect via its actual host name or ip address. I can ping the address with no problem, but I can't connect to port 1433 using the actual host name or ip address.
I am no problem connecting to the secondary node using its host name, but can not get to it through the listener using the applicationintent=readonly. Eventually I would like for everything to connect through the listener name, but for now still need to connect via the server's host name and don't understand why; everything I read is that the primary node should be able to be connected via both the host name and the listener name.
choosing a primary key for the database which i am designing.
I have few tables which contains 5 -15 fields out of it 3 - 9 columns combined to form the uniqueness of the row.
All are un-related tables. Three parent tables connect with 20 child non-related child tables.
I believe it would not be a wise choice to choose 3 to 9 fields for primary key. But if i use an auto increment as a key will there be of any use as it might never be used to fetch rows. Then why do i still have to go with that?
Or Is it ok to create a primary key of upto 5 attributes?
We have several Sql Server 2014 AlwaysOn Availability Groups set up in our test lab and use a combination of SCDPM and Maintenance Plans to back up the databases in them.
Our applications always work well regardless of which of the physical servers are, at any given time, designated the "Primary" for a database. Automatic failover works fine.
There are other applications, such as SQL Server built-in backup and System Center DPM that only work properly when the databases are currently hosted where originally intended.
During the normal course of Windows Updates, etc., machines will occasionally be rebooted in the middle of the night. When they come back up, we would like them to "reclaim" the databases that properly belong to them, in an orderly fashion of course (when the "Synchronization State = Sychronized"). We have lots of these test servers and we do not have staff watching the servers in the middle of the night.
Is there an automatic way to accomplish this?
How can I Export Database with foreing Key and primary key.
Operation is that
SQL2005 Management Studio/Database/Tasks/Export Data
Before Version is SQL2000 we can Selected Copy Object and data between server and then Use Default Options click checked and Select Copy Index, Copy Foreing Primary key vs vs
But this options is not found in the SQL2005 Management Studio/Database/Tasks/Export Data wizard or I can't found it.
How can I export foreing Key and primary key with SQL2005 Management Studio/Database/Tasks/Export Data wizard.
Best Regards,
Athena.
In SQL Server Management Studio, it is possible to do the following:
a) In Object Explorer, connect to a particular SQL Server Database Engine, let's call it X.
b) Use that connection to generate many SQL queries, connected to X, in the right-hand pane.
c) In Object Explorer, connect to a particular SQL Server Database Engine, let's call it Y.
d) Use that connection to generate many SQL queries, connected to Y, in the right-hand pane.
e) Close the connection to X, which was created in step (a), from within Object Explorer.
In the right-hand pane, I am now left with a bunch of queries connected to X, and a similar bunch of queries connected to Y. Any quick way to shut all the queries connected to X, but none of the queries connected to Y?
This question can assume real practical importance if server X is a Live Production Server, and server Y is a Test Server, and my next job of the day is to run a change script against server Y....
I have looked for an option in Management Studio to "Close all queries connected to Server X", but haven't found one.
How to find the pending transactions to be applied on secondary in Always On? Can i get those details from dashboard?
View 2 Replies View RelatedWe 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?
I'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 RelatedI 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?
We 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?
While configuring SQL Server 2012 Cluster with Always on, why do we need two secondary replicas.
The attached link will describe the actual query. [URL] ....
I have an A & B node set up and running. I now want to add a C NODE.
The catch is the C NODE is in a SQL Cluster Environment.
I am guessing I add the Virtual Name of the C node to the current Always ON Cluster?
I tried adding it...the error message says" the Virtual Node is really the A node and to add the A NODE"?
What are differences between always on and SQL Server Clustering
View 1 Replies View RelatedWe have 4 Servers which have SQL SERVER 2012 and "AlwaysOn" have been enabled on all 4 servers:
Server1,Server2,Server3,Server4
Server1 is the Primary node and thr rest are secondaries. There is a Sync relation between Server1 and Server2 and also there is aSync relation between Server1 and Server3 & Server4.
Is it possible to setup log shipping from Server2 & Server3(secondaries) to two new servers?
I have four instances and each instance have its own Availability Group with its own listener.
Would like to know if you can have one listener for multiple Availability groups?
How many nodes can you have in a cluster with SQL 2012 alwaysOn.
I understand that availability groups are limited to 5 nodes but if you had a 10 node cluster and decided to create multiple availability groups using various nodes within the 10 nodes but never exceeding 5, is that possible?
Or is there a counter or some validation from SQL AlwaysOn that actually hard limits to a grand total of 5 nodes in a cluster?
We had 3 Availability Groups set up in SQL 2012 last year but they were poorly named so I am just looking to rename them but there doesn't seem to be any command for it that I can find.Can they not be renamed once created? I guess I could just create new ones and move the DB's into them but just thought I would check!
View 1 Replies View RelatedConsidering trying to move 2008 acitve/passive cluster with log ship to day old read only 2008 server to 2012 active/passive to 2012 AG Read only server. Only problem is that read only instance may have to be a 2nd instance on a server. The new box is a beast 64 core 256 gig of RAM hp so this is no dog. So I have these choices
migrate 2008 active/passive cluster to 2012 active passive (this will be it's own ordeal)take new monster box and build two instances, one that will run the AG read only database, the other will house reporitng services and analysis services and a few dw databases. We are not heavy into deep dive analysis services yet kind of in it's infancy. Not sure if this other instance will be sql 2008R2 , may be able to do 2012. MY also have a few small sharepoint databases but they barely use it.
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.
View 0 Replies View RelatedIn 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'm setting up AG replication over our WAN (1GB MPLS). Using sql stress, AG replication quickly falls behind. Network throughput plateaus at ~14Mbs.
The problem ISN'T NETWORK
using conventional mirroring, the same workload never falls behind, throughput plateaus at ~26Mbs.
it's almost like log stream compression isn't happening for AG...
both mirroring and AG are using async.