SQL 2012 :: Data Collection Fails For 1 Of 4 AlwaysOn AG Groups
Jun 5, 2014
I have a two node SQL 2012 AlwaysOn HADR cluster (v11.0.3412) with 4 availability groups configured. The AG groups are set to synchronous mode and the secondary is not readable (we do not want the synchronous replica readable so we do not risk any reads causing contention so we maintain fast performance).
On the secondary we are getting a persistent failure with the Data Collector job called Collection_Set_3_Upload. The failure occurs within the second job step. That job step is executing the following command:
dcexec -u -s 3 -i "$(ESCAPE_DQUOTE(MACH))$(ESCAPE_DQUOTE(INST))"
The error message is as follows:
Log Job History (collection_set_3_upload) Step ID 2 Server CLUSTERNODE2
Job Name collection_set_3_upload
Step Name collection_set_3_upload_upload
Duration 00:00:07
[Code] ....
I know I can prevent this error message by enabling readable secondaries, but we do not want this.
I have tried stopping the data collection jobs and purging the cache directory but to no avail. It will succeed the first time then persistently fail again with the same message every time after that.
In addition, if I set the one failing AG group to readable secondary the job succeeds. So that means that 3/4 work fine, only this one is having an issue.
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Jul 9, 2015
I am setting up a 3 node cluster as part of an availability group.Initially I tested failover between nodes using SQL Management Studio and everything failed over successfully when I stopped a node, and I was still able to write queries. I started to test with an application which connects using an SQL user and whenever I would switch nodes, I would get login failed. I believe the cause of this issue is because the server logins SID's which are tied to the database are different than the server logins on the other nodes which resulted in login failed.how can I ensure that the server logins SID's are the same between nodes? Is there a way of copying this over or how is this supposed to be done? I read a little about contained databases where I could just set the login on the database itself vs. creating a server login but I would rather not go down that route.
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Feb 13, 2014
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?
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Apr 28, 2014
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!
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Sep 15, 2015
We have multiple SQL 2012 SQL servers setup in an alwaysOn availability groups. Where should we schedule the re-index? We have Server1 as the primary and 2 secondaries Server2 and Server3. Are their any tricks to have it run on which ever one is the primary?
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Mar 30, 2014
It is possible that Data Collection can cause massive increasing MB/sec to tempdb ? I cannot find connection with tempdb and I set cash file, but on same disk.
Or it can be something different? Last two weeks what I checked was Read/Write MB/s to tempdb increasing progressively.
One time it was about 20MB/sec
After it was reseting and again 1MB/sec..
What I checked , External company which install SQL Server made one file for tempdb, next week or during breaktime(it will be possible), I would like make 8files next weekend work.
Now I saw that TempDB mdf was still increased, but using was just 8-10%
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Apr 17, 2014
I Enabled Data Collection on one of the server and planned to make it as Centralised Management Data Warehouse I configured data collection on it and can view reports. Next, I went to other server and configured "Set up data collection" to use my first instance as the centralised Database. But the issue is I can only see reports of first server. Am I missing something here.
I did exactly as explained in this video [URL] .....
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Oct 26, 2015
Last weekend many of our severs had a failed job "collection_set_3_upload". The error that occured is: "Violation of PRIMARY KEY constraint 'PK_ active_ sessions_ and_requests'. Cannot insert duplicate key in object 'snapshots.active_sessions_and_requests'. The duplicate key value is (2824333, 2015-10-25 02:54:49.7630000 +02:00, 1)."Last weekend we happened to go from summer time to winter time. i.e. the clock passed 02:00 - 3:00 two times during this night.
I.e. there is a bug in the Data Collector component that collects data for the Management Data Warehouse: it uses local time instead of UTC. I've created a Connect item to report it to Microsoft.URL...how do you get your process running again? the job will no longer run because it will every 5 minutes keep on trying to upload the conflicting data for the 2nd 2:00 - 3:00 period. I've only found one solution: get rid of all data collected but not yet uploaded.
You do this by stopping the Collection set (in SSMS go to Object Explorer -> <the server you want to fix> -> Management -> Data Collection -> System Data Collection Sets. Right click "Query Statistics" and select "Stop Data Collection Set").Then you delete the cached results from the sql server machine's harddisk. These cached results are in files located in a Temp folder on the sql machine itself, inside the AppData folder for the service account SQL Server Agent is running under. Usually it will be something like: c:Users<sql agent service account>AppDataLocalTemp.
Inside this folder delete all files that have 'QueryActivity' in their name. You'll loose all data collected since the start of wintertime, but at least your data collection process will work again.After this you can start the Collection set again by right clicking it and select "Start Data Collection Set". Every 5 minutes the data will be summarised and uploaded into your management data warehouse.
Posting Data Etiquette - Jeff Moden
Posting Performance Based Questions - Gail Shaw
Hidden RBAR - Jeff Moden
Cross Tabs and Pivots - Jeff Moden
Catch-all queries - Gail Shaw
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May 30, 2014
i am trying to configure data collector on my server. so i configured data collector on server A and setup on server B. but the "Query statistics collection set" do not show me any data.
i right click and select "collect and upload now " item and get success result for this. but in the report i cant see any data...
also in the log page of data collection i see so many errors with messages like this:
"Failed to create kernel event for collection set: {2DC02BD6-E230-4C05-8516-4E8C0EF21F95}. Inner Error ------------------> Cannot create a file when that file already exists."
i tried some solution like disabling and enabling again, re-configuring, removing and configuring again .... but none of them work right.
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Sep 16, 2015
Can we set up always on availability groups in server 2012 standard edition.
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Apr 2, 2015
The MSDN doc makes it sound like after a failover of the primary, the CDC data won't "keep working" on the secondary unless you "To allow the logreader to proceed further and still have disaster recovery capacity, remove the original primary replica from the availability group using ALTER AVAILABITY GROUP <group_name> REMOVE REPLICA. Then add a new secondary replica to the availability group."
We have a few CDC tracked tables that we use and the general idea of AlwaysOn I thought was to minimize all the overhead and let things "just work" so your apps just connect and the listener re-routes everything where it needs to go.
It looks like to get this working properly an automated job /trigger would have to wait for a failover event and then kick off tasks to remove and re-add the replica and perhaps start up the CDC job on the secondary?
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Oct 19, 2015
I'm doing a certification process using AlwaysOn, and was using the link below, and on the lower 90 hotfix, and instead of downloading one by one, and then upgrade one by one updates, is there any way to make it more faster or practical, or unfortunately have to do this one by one, so the download as the update? This rollup contains the latest version of the Windows system files that are updated after the release of SP1. URL...
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Apr 28, 2014
I am looking for the easiest way of rebalancing data across multiple files.
Instead of creating a secondary filegroup and then dropping and recreating all indexes in the database which is going to take ages (we have a lot of tables and indexes), I am trying to just add more files to the primary file group and then rebalance data evenly between these.
I guessed that adding the new files to the primary file group and then rebuilding all indexes on a table should redistribute the table over these multiple file groups evenly. This is not the case though. It does rebalance data a bit but I still end up with the majority on the first file that existed.
I have attached the script I am running, maybe it is something in the create database/file statements that is the issue.
Basically what I am seeing is to start off with the table is 160MB. I then add the file groups and rebuild all indexes on the table. The first file is then about 100MB and each of the three other files are about 20MB. I would expect them all to be the same size.
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Sep 15, 2015
I am planning to have AlwaysON Availability Groups setup between Server 1 and Server 2
Server 1 -->Publisher-->2014 SQL Enterprise edition-->Windows Std 2012 --> Always on Primary Replica
Server 2 -->Publisher(when DR happens)-->2014 SQL Enterprise edition-->Windows Std 2012 --> Secondary Primary
Server 4 as Subscriber
Server X as Remote Distributor ..
If i create Publications on Server1 (primary replica) to subscriber 4 servcer, will the publication be created automatically in Secondary Replica Server2 ? or do i have to create manullay using GUI/T Sql on Both Servers?
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Dec 1, 2015
I have configured replication between Always ON Availability Groups (Listener) (PUBLISHER), remote distributor to XYZ SUBSCRIBER...with above link ...
Now, I want to know how to replicate Data from XYZ SERVER a PUBLISHER to Always ON Availability Groups (Listener) (SUBSCRIBER)? Distributor Database being on XYZEX:
XYZ SQL SERVER as PUBLISHER, and DISTRIBUTOR
to
Always ON Availability Groups (Listener) SUBSCRIBER...
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Sep 14, 2015
I am planning to have AlwaysON Availability Groups setup between Server 1 and Server 2
Server 1 -->Publisher-->2014 SQL Enterprise edition-->Windows Std 2012 --> Always on Primary Replica
Server 2 -->Publisher(when DR happens)-->2014 SQL Enterprise edition-->Windows Std 2012 --> Secondary Primary
Server 4 as Subscriber
Server X as Remote Distributor ..
as of now , In the event of Disaster happens on Node 1 i will have to manage JOBS on Node 2 (backups, Maintenance, replication, day-day other Jobs)..Is there a way i can call all jobs to run from a remote server which executes on Active NODE(which ever is active)? so that in the event of disaster happens on node1, when node 2 becomes online and i don't have to do anything with SQL Agent or jobs on Node 2?
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Jan 9, 2015
I'm trying to move a log file of a database that is part of an availability group. I have been following steps from the article: [URL]
At first this worked fine for me in a test environment. When I tried it in a production environment the database on the secondary went into "Recovery Pending" state and I can't get it out.
I checked to ensure that the dB is looking in the right place for the log file, and it is. It just doesn't seem to actually use the new file. If I start and stop SQL service, the dB comes back up and is fine.
Here are the steps I'm going through and what is happening at each step:
--------------------------------------
:Connect DEVSQL --This is currently PRIMARY
USE[master]
GO
ALTER AVAILABILITY GROUP [DP-AG-DEV] MODIFY REPLICA ON N'DEVSQL' WITH (SECONDARY_ROLE(ALLOW_CONNECTIONS = NO))
[Code] ....
All is good so far. Both the Primary and the Secondard have had their logical files changed, which has not taken affect yet because there has been no failover.
--Make SQL10 the PRIMARY
:Connect SQL10
ALTER AVAILABILITY GROUP [DP-AG-DEV] FAILOVER;
GO
SQL10 is now the Primary for this AG. And, as expected, the database [AG-Test] is in "Recovery Pending" because it is now looking for the log file in the new location. I need to move the file to the new location.
:Connect DEVSQL
--Enable XP_CMDSHELL
sp_configure 'show advanced options',1
go
reconfigure
go
sp_configure 'xp_cmdshell',1
[code].....
This is where the script is failing, returning the error:
Msg 1468, Level 16, State 5, Line 5
The operation cannot be performed on database "AG-Test" 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.
Msg 5069, Level 16, State 1, Line 5
ALTER DATABASE statement failed.
I can not get the dB to recognize the log file at it's new location.
If I restart the SQL Service, it comes back fine, which seems to indicate to me that it is not a permission problem and confirms that the file is in the right place.
How do I force SQL to look for the log file again without restarting the service?
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Oct 16, 2014
This is my first deployment of an always on availability group for SQL 2014 and I'm trying to get my custom backup procedure to handle all databases appropriately depending on the primary group. Basiscally I want the system databases and all databases that don't participate in the availability group to be backed up on both nodes and those that do participate backed up ONLY on the primary server. I've looked at the sys.fn_hadr_backup_is_preferred_replica funcation, but would like to only have to test for a single databases existance in the availability group. If the one database is in the group, only backup the system databases and those that don't participate, otherwise backup everydatabase. This would be the case for both full backups and transaction logs.
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Jul 26, 2006
I'm trying to set the value of the SelectedDatabases collection property of an Update Statistics Task using an expression for the task, basing it on a user variable. Ultimately, I'll set that variable's value from a configuration file at run time and thereby specify the database whose statistics I want to update.
When I set this up in the designer, I get an error at the time I try to save the package:
TITLE: Microsoft Visual Studio
------------------------------
Nonfatal errors occurred while saving the package:
Error at Update Statistics Task: The result of the expression "@[User::SelectedDatabase]" on property "SelectedDatabases" cannot be written to the property. The expression was evaluated, but cannot be set on the property.
Error at Update Statistics Task: The result of the expression "@[User::SelectedDatabase]" on property "SelectedDatabases" cannot be written to the property. The expression was evaluated, but cannot be set on the property.
------------------------------
BUTTONS:
OK
------------------------------
I used the expression editor's expression builder to select the user variable, so I assume the syntax is correct. However, I'm suspecting that there's some additional syntax required to store that value in the collection's array. I cannot find any references to any special formats and am wondering if anyone know's how to do this correctly. On the other hand, maybe it is telling me setting this property from an expression is not even allowed. If it's not allowed, why is it in the list of properties to set? In any case, none of this is clear.
Any ideas or suggestions are appreciated. Thanks,
Joe
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Aug 21, 2014
OK, so I have:
- 500 GB DW
- 5 GB in smaller DBs
- 220 GB TempDB
- 350 GB in Log files.
My machine is Fujitsu Primergy 64 cores (with HT) and 192 GB RAM.
I have several IO locations:
- 540 GB in-server HDD 15k RAID10
- 1 TB HDD 15k RAID10 on SAN (separete controller)
- 2 TB HDD 15k RAID10 on SAN (same controlller as below)
- 800GB SSD RAID10 on SAN (same controller as above)
Data warehouse has 2 fact tables that are absolutely crucial and quite large.
Now i want to organize DB into several Filegroups and put them on different drives. Filegroups I'm thinking of:
- FILEGROUP1: for 1st crucial Fact Table
- FILEGROUP2: for 2nd crucial Fact Table
- FILEGROUP3: for tempDB
- FILEGROUP4: for dimensions data
- FILEGROUP5: for the rest of facts data
- FILEGROUP6: for dimensions indexes
- FILEGROUP7: for the rest of facts indexes
- FILEGROUP8: for 1 log file of one smaller DB (its in full-recovery and its quite large)
- FILEGROUP9: for the rest of log files
- FILEGROUP10: others
How should I organize them across available drives? I was thinking about sth like:
800 GB SSD: FILEGROUPS 1-3
2 TB RAID10: FILEGROUPS 5+7+8
1 TB RAID10: FILEGROUPS 4+6+10
540 GB in-server: FILEGROUP 9
I know that having multiple filegroups on the same drive is pointless regarding performance, but in future i could actually add some more drives, so i want to separate them now.
Also - how much files per filegroups should i create? Considering 1 or 2. Except TempDB where I am going for 4.
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Jan 25, 2008
I have a new SQL 2005 (SP2) Reporting Services server to which I've just upgraded and deployed some SSRS 2000 reports.
I have a subreport that contains a matrix with two groups. The report data seems to be inexplicably repeating the data for the first row in the group for all rows in the group. Example:
ID1
ID2
DisplayData
1
1
A
1
2
B
1
3
C
2
1
A
2
2
B
2
3
C
Parent group is on ID1, child group is on ID2, report would show:
1
1
A
2
A
3
A
2
1
A
2
A
3
A
Is this a matrix bug in 2005 SP2, or do I need to do something differently? I can no longer pull a comparison version from an SSRS 2000 server to verify, but I believe it was working as expected before...
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Jun 17, 2014
Is there a way to query the LDAP from inside the CMS? I know I can add a linked server in a singular instance but I'd like to do it inside a server group. I haven't found anything so far about querying the LDAP inside a server group so it might not be possible?
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Aug 18, 2014
How to find the pending transactions to be applied on secondary in Always On? Can i get those details from dashboard?
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Oct 22, 2014
We 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?
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May 13, 2013
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?
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Mar 13, 2014
I 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?
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Apr 11, 2014
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?
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Apr 14, 2014
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] ....
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Apr 28, 2014
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"?
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Apr 24, 2015
What are differences between always on and SQL Server Clustering
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Sep 20, 2005
What is the better table design for a data collection application.1. Vertical model (pk, attributeName, AttributeValue)2. Custom columns (pk, custom1, custom2, custom3...custom50)Since the data elements collected may change year over year, whichmodel better takes of this column dynamicness
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Jan 23, 2013
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?
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Mar 17, 2014
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?
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