We have a current HA cluster at center1 which is mirrored to another HA cluster in center2. We have several instances already installed and working which are using one NIC for data and replication. We want to prevent mirror failovers by
configuring a NIC on a replication network which has no DNS server. What are the steps to configure the current SQL instances to use this dedicated NIC for mirror replication?
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How to configure current SQL high availability cluster using mirroring with dedicated replication NICS?
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Managing the Principle and Mirrored DB's across 2 Servers.
We have mirroring set up across 2 servers with a witness server. A1, A2 and W1 respectively. We have 16 Databases. Can half of the DB's on A1 be the Principle, while A2 is the Principle for the other half? Basically I want to understand if I can sort of balance the DB's across the 2 servers. Some DB's being Principle on A1 and others on A2.
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Mirror is disconnected - Connection attempt failed with error: 10060
Hi
I have two sql servers using Database Mirroring. there servers are located on different datacenters . there is no witness so it is an async replication.
Today we had issues with the network connection so DBM was going up and down for a while until it got disconnected.
The WAN link is fully up now but DBM did not resume this time.
The error message on the primary is :
Database mirroring connection error 2 'Connection attempt failed with error: '10060(A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.)'.' for 'TCP://SERVER_DR.mydomain.net:5022'.
I tried PING and TELNET(to the endpoint port 5022) from the Secondary box to the Primary and the other way and that works. I even restarted the Secondary but the connection is still down.
I don't want to reboot the primary so I am asking for ideas to try
Thanks
Javier Villegas | @javier_vill | http://sql-javier-villegas.blogspot.com/
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Identifing Primary Server for Mirrored Database
HI All,
Kindly let me know how to identify Primary Database Server from a Mirrored Database in SQL Server.
Regards,
Varun
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DB Mirroring Listener port different
HI All
Today I setup first time DB mirroring for vCenter application, during failover my application vCenter not able to connect. During investigation I found my listener port is different on both nodes (Principal 5022) and (Mirror 5023). Please suggest if differe port can fail my failover test.
Getting below error -sql server error:- 2146893022 SQL Server native client 10.0 sql server network vcenter.
Please help me and give your valuable suggestion, its bit urgent.
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Maximum Number of Mirrored Databases Decreases as Number of Available Cores Increases?
Hi,
I wonder if you can help me. We're planning a large in-house mirroring deployment and are concerned we may (at some point) run into the limits described in the following KB article:http://support.microsoft.com/kb/2001270/en-gb.
Based on the formulas contained within the above article, I knocked up a quick spreadsheet to see how increasing the number of cores might allow us to increase the number of mirrored databases. However, to my surprise, my calculations imply that as you increase the number of cores, the number of databases you can potentially mirror decreases?
| No. of Logical Cores | Max Worker Threads | Threads Required per Mirrored Database | Max. No. of Databases that can be Mirrored |
| 4 | 512 | 3 | 170.6666667 |
| 8 | 576 | 4 | 144 |
| 12 | 640 | 5 | 128 |
| 16 | 704 | 6 | 117.3333333 |
| 20 | 768 | 7 | 109.7142857 |
| 24 | 832 | 8 | 104 |
| 28 | 896 | 9 | 99.55555556 |
| 32 | 960 | 10 | 96 |
| 64 | 1472 | 18 | 81.77777778 |
Am I missing something here? Have a miscalculated somewhere? This seems counterintuitive.
Regards
Andy
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Cannot remove Mirroring due to Error 3456? SQL 2012
I have a database that was a mirrored partner and went into suspended state. (Mirror Server was shut down).
I took the principal database out of mirroring using SSMS. But now I am unable to restore the mirror database so that I can set up the mirroring again.
When I run ALTER DATABASE X SET PARTNER OFF on the Mirror, SQL logs Error 3456 (Could not redo log record)
When I run RESTORE on this database from a backup - SQL tells me I cannot because the database is involved in mirroring.
Is there any other way to drop this database safely? I cannot take it offline and cannot delete it for the same reasons. It seems I cannot remove mirroring on the Mirror, for some reason. Thank you
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Mirroring Should need identical hard drives?
Hi
I try to m
Thanks & Regards Manoj
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SQL SERVER 2012 Mirroring Failed with NT AUTHORITY\ ANONYMOUS LOGON
Hi
I try to do mirroring with three servers Principal ,Mirror and witness but it ends up with 1418 and event viewer of mirror shows this message
Database Mirroring login attempt by user 'NT AUTHORITY\ANONYMOUS LOGON.' failed with error: 'Connection handshake failed. The login 'NT AUTHORITY\ANONYMOUS LOGON' does not have CONNECT permission on the endpoint.I
I am using Sql server 2012 with sp1 and Windows server 2012. I dont create any domain. All the three machines sql server,browser,agent are running in NT AUTHORITY\NETWORK SERVICE and all service account across three machines have same password. I could
not find what i missed. Please help me to solve.
Thanks & Regards Manoj
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Incorrect Alert Raised: Connection With Mirror Lost WHEN state change was to Syncrhonizing
Observations:
- Strange / Incorrect Alert Recordings
- As can be seen from the Screenshots in the Word Document – the Windows Event Log reported a TCP/IP Connection Failure
- The Alert is set to monitor a State of 6 “Connection with Mirror Lost”
- The Mirror monitor however shows that there was a state change but change was as follows:
- i. 06:00 – State = Synchronized
- ii. 06:03 to 06:07 – State = Synchronizing
- iii. 06:08 Onwards – State = Synchronized
- NO “Mirror Lost” State in the Mirror Monitor
- The AppLog SP Cleanup ran at that time – as can be seen by the Negative Growth in Table Size at 06:00
Possibilities:
- The Mirror Connection Lost Alert was incorrectly trigger by a State Change (Synchronized to Synchronizing to Synchronized)
- The Transaction Log Backlog was 8MB at the time of the Alert
- The SSMS connection to the Mirror at the time of the Alerts as active and operational
- The Mirror Monitor showed the State to be “Synchronizing” and NOT Lost
Thanks Howard Diesel
I have a Word Document with all the screenshots - not sure how to attach↧
Database Mirorring
Hello,
we have security issue for administrator on SQL Server, where we have mirroring up and running for 2 years. But since today it just started to show error message below.
Could you please give me some advice what I can do with this?
Thank you in advance,
Radek
Date 27.8.2010 16:31:01
Log Job History (Database Mirroring Monitor Job)
Step ID 0
Server XXXYY
Job Name Database Mirroring Monitor Job
Step Name (Job outcome)
Duration 00:00:00
Sql Severity 0
Sql Message ID 0
Operator Emailed
Operator Net sent
Operator Paged
Retries Attempted 0
Message
The job failed. The owner (Domain\administrator) of job Database Mirroring Monitor Job does not have server access.
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SQL Server Availability Groups
Hello,
If we want to use SQL availability groups and have the secondary used only for reporting purposes and not DR, do we still need to use the Windows clustering?
Thanks,
m
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Different Drive Structure Between Principal and Mirror
We havea 2-node (active/active) cluster with four failover instances installed. We use a dedicated drive for data files, one for log files and one for tempdb per instance .Predicting that we will be adding more instances in the future, we realized that we would run out of drive letters to set up. We intend to switch over and use mounted volumes instead that way we only use 1 drive letter per instance and will be able to add many more failover instances in the future. However, seen as we have over 150 databases across all current instances, reconfiguring the cluster drive setup will require a lot of time and work and is not in the immediate plans for our team (me :( ). I need to mirror as many databases as possible, based on priority, to a DR server on a geographically remote location. Since this server isn't setup with SQLServer yet, I was wondering if it would be a good idea to have the DR server set up with mount volumes now and establish mirroring between our production environment and the DR server that way so that at least half the battle is won. I am aware that the best practice for mirroring is to have the same drive structure between the principal and mirror server, however it is not a requirement. The only example issue I have seen with this set up is when you add a data file to a database and the DDL statements get sent over to the mirror and will fail since the drive setup will not be the same. This is something I am willing to deal with since adding data files to our databases is not something we do often, or at all. As new databases are added and mirrored, the WITH MOVE clause of the RESTORE statement can be used to place the files in their correct location in the mirror server.
Other than this, are there any other things to consider for this kind of mirroring set up?
Leroy G. Brown
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Sql Server Synchronization from Local Server to Web Server
Hi All frnds
All the day we are entering data in our local Sql server 2008 and at the evening time I want to synchronize my Webserver also, so How I can synchronize my database on the webserver from my local database. Please someone help in this regards, I will thankful to him, Thanks in Advance.
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how to bring principle server to offline in mirroring
hi, I configured mirroring and now intentionally I tried to bring the principle to offline. how can I do this?
help me..
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mirroring error
hai,
I tried to solve problem by
1) allowing sqlserver through windows firewalls.
2)giving sys admin permissions to all the users and in server logins also for accessing database.
3)before that I successfully restored in mirror with no recovery.
please help me how to solve this problem.
thanks.
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checking latency in mirroring
hi,
how do you see latency? what are the causes of it in mirroring? how to over come from it?
please provide me a basic idea with any scenarios.
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replication with push subscriptions
hi,
My replication is configured with push subscription, the data is replicated to subscriber server and unfortunately data was deleted at subscriber and now the subscriber needs that data instantly.so how can subscriber will get data?
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MyFileName.mdf is not a primary database file
While accessing to an .mdf file, I receive this: MyFileName.mdf is not a primary database file. Does it mean the file is corrupted?
Please help in repairing this file. I heard about some manual tricks to fix SQL database corruption, but I'm not aware of it.
Please share it.
Thanks.
Please help in repairing this file. I heard about some manual tricks to fix SQL database corruption, but I'm not aware of it.
Please share it.
Thanks.
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How To Recover Data From A Corrupt Mdf File?
Hi All,
By mistake i delete database from sql server. Due to which the the mdf and ldf file of the datbase are removed from my system. Then i used file recover utility and retrived my mdf and ldf files.But now i am not able to attach those files into databse. These mdf and ldf files has been corrupted. Now how can i recover my data from those mdf and ldf files.Please answer me if you have any solution on this problem.
By mistake i delete database from sql server. Due to which the the mdf and ldf file of the datbase are removed from my system. Then i used file recover utility and retrived my mdf and ldf files.But now i am not able to attach those files into databse. These mdf and ldf files has been corrupted. Now how can i recover my data from those mdf and ldf files.Please answer me if you have any solution on this problem.
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