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?
Hi
I want to suspect database
stop server first
I try to rename C:Program Files (x86)Microsoft SQL ServerMSSQL.1MSSQLDatamsdbdata.mdf to msdbdata.sav
and then start the server
use command to check:
SELECT status & 256 FROM master.dbo.sysdatabases WHERE name = database_name
if the result is 256,it means the msdb is suspect,but the result is 0,it same as the normal status
do you know how to set database suspect with this way, or do you know other way to suspect databse.
absolutely,I could re-back my server noraml with your way
Thanks
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 Replies View RelatedWe 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've been working with sql server for some time, but couldn't find any way to fix this problem without rebooting the production and secondary sql servers, which is not very good for uptime .
I'm running a primary and secondary availability group on sql 2012 enterprise edition on windows server 2012, and it runs fine except when a network outage occurs.
Then the handshaking keeps failing, and the secondary databases all show not synchronizing.
The primary DBs all show synchronized.
I tried following several different troubleshooting guides for always on, but nothing I tried fixed the issue.
The only way to get them in sync is to reboot both primary and secondary. Just rebooting the secondary didn't fix it.
The secondary server error log showed AlwaysOn Availability Groups connection with primary DB established, then DB mirroring login succeeded, then error 35250, the connection to the primary replica is not active, then connection timeout.
I increased query connection timeouts to 60, but that didn't work.
I'm writing a site in ASP.NET 2.0. I have business logic that contains two methods:ModifyUserInDB() // Modifies user data in a SQL 2005 tableandGetUserFromDB() // Gets user data from the SQL 2005 user tableIf the two methods above get executed at the same time by two different users (but on the same record in SQL 2005), how do I prevent the data from being corrupted? Does SQL do this automatically?If I make the methods static, and synchronize them, will it fix the issue? Are static objects the same instance for all users?
View 5 Replies View RelatedWe found an interesting 'issue' in one of our productive user database:
The output of msdb..suspect_pages table:
db_idfile_idpage_idevent_typeerror_countlast_update
16 2 22 32015.06.12 10:40
16 2 3 3 3 2015.06.12 10:40
16 2 6 3 3 2015.06.12 10:40
16 2 7 3 3 2015.06.12 10:40
16 2 1 3 3 2015.06.12 10:40
The problem is, that this user database only has one data file and file_id 2 is the log file.I understand that the event_type shows checksum and torn page error but in the log file? DBCC CHECKDB shows no errors and the database is part of an AOAG in synchronized state.We have log backups in every 15 minutes.
Hi All,
I will have to setup two windows 2000 servers at separate locations. Each server will host the MS SQL 2000 database. The data on both database will need to be in sync in real time. Is it possible to do? If yes, any suggestions of how do do it?
Thanks
Khen
Can someone recommend a utility (preferably open-source) tosynchronize changes across servers? I need to bring only data over insome cases, and only objects in other cases. Any ideas?Thx!
View 5 Replies View RelatedHi, I have developed a software which is to run on multiple PCs on a network sharing the same database on an inhouse server. There is another database which has some similar tables that sites on a server where the website is. I need to have the common tables synchronized. How is this possible and what issues will I have in doing this?
Well there be a problem if the synchronization happens when someone is using our software which is making some changes to that table at the same time? Or if someone on the website is entering some information that updates the database?
I am using Visual Studio 2005 with C#. Access Database.
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 RelatedHi!
I have some questions about the MSDN article "Step by Step: Developing a SQL Mobile Application with Visual Studio 2005 and SQL Server 2005" (it is msdn2.microsoft.com/en-us/library/Aa454892.aspx).
Everything works good up to Exercise 3: Synchronizing Data Between Any Backend Database and SQL Mobile Database Using a Web Service. It is said that we need a DataService.asmx file to be enetered into "Web reference name". Unfortunately I can't find the HOL302_SQL_Mobile to download and install this file. Where I can find this file?
Can anyone tell me how can I do such a replication(C#)?
How can I synchronise data from mobile device to SQL Server using GPRS connection? (I only know replicating over USB).
We 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.
Can we make SQL 2012 Always ON over the normal SQL Cluster 2012.
View 3 Replies View RelatedI have setup SQL AlwaysOn between primary and DR data centers. Here is the setup:
Primary data center: Server1 (Primary), Server2 (Sync Commit Secondary), Server3 (ASync Commit Secondary)
DR data center: Server4 (ASync Commit Secondary)
Data synchronization and manual failover works fine. But, sometimes, the AlwaysOn cluster automatically fails over to Sync Commit Secondary on Primary data center. Here is the error message from Failover Cluster Manager->Cluster Events:
"Cluster has missed two consecutive heartbeats for the local endpoint xx.xx.xx.yy:~3343~ connected to remote endpoint xx.xx.xx.zz:~3343~"
"Cluster has lost the UDP connection from local endpoint xx.xx.xx.yy:~3343~ connected to remote endpoint xx.xx.xx.zz:~3343~"
I had our network engineer check all connections multiple times and he confirmed everything is fine. But he was also able to confirm (using monitoring tools) that right at the time of a failover, there is almost 2GB worth of traffic going from Primary Server to DR server. That happens every time. I had checked the times of all failovers and there is no job or process occuring that will produce 2GB worth of data. Also, this happens regardless of which server is primary.
Even though the failover works fine, this unexpected automatic failover due to missed heartbeats are occurring often (2-3 times a month).
Here is the list of errors from the Cluster Validation Report:
Under Network Section, I see the following error messages in Red:
Validate Network Communication
Network interfaces Server4 (DR) - SAN_Team and Server1 (Primary) - SAN_Team - VLAN 20 are on the same cluster network, yet address xx.xx.xx.pp is not reachable from xx.xx.xx.yy using UDP on port 3343.
Network interfaces Server4 (DR) - SAN_Team and Server2 (Secondary) - SAN_Team - VLAN 20 are on the same cluster network, yet address xx.xx.xx.qq is not reachable from xx.xx.xx.yy using UDP on port 3343.
[Code] ....