Replication, Mirroring And Log Ship
Jul 3, 2006
dear all,
I have a case.
I have 1 production server and wanto to add 1 more server.
my production server is using sql 2000 stnd edition.
I want to have an indentical database from my production server.
the problem is my second server is using sql 2005 stnd edition.
I have try to use replication but because the my production database didn't have relationship on the database so I can't use transaction replication, I can't use mirroring and log ship too because the sql use the different version.
any idea or suggestion will be great....
regards,
-dedys
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Feb 22, 2006
Hello all,
Many people are angry at MS for promising and not delivering on the mirroring feature of SQL 2005.
Does anyone have any idea - officially or unofficially when this feature will be available for reliable use, as we would like to use it.
Thanks,
S.
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Dec 17, 2007
when shipping data from one place to another, without complicated merge needs, do service broker and replication differ in what they offer?
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Oct 2, 2007
We have a sql server 2000 sp3 server on a win2k3 server standardedition. This is on dell hardware with a dell scsi dasd enclosuredirectly attached. We want to duplicate the hardware and replicate ormirror the database to the backup server and do a manual or automaticfailover in case of outage(more than likely manual). Wondering rightnow if replication - with say software like doubletake - is preferredover sql database mirroring or vice versa. Thanks
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May 22, 2007
I am setting up transactional replication on a database A with read only subscriber database B (for reporting purpose). I have also setup mirror on database A. I tried to manually failover to mirror...mirroring works fine but transactional replication is interrupted.
I have followed the steps as in article
http://msdn2.microsoft.com/en-us/library/ms151799.aspx
I have also used PublisherFailoverPartner parameter...but replication still complains that it cannot connect to publishing database.
Any ideas or direction is greatly appreciated.
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Nov 24, 2006
Hi MSSQL friend,
We have a SQL2005 server which contains some replicated databases. We use merge replication and the publications are all local.
In order to make the server failsafe we need some kind of mirroring. Is this possible with replication?
Any ideas how to accomplish a failsafe scenario with replication?
Sincerely Edward
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Aug 28, 2007
Does anyone have an opinion on which is more efficient?
Currently have a cluster setup and I'd like to setup mirroring or transactional replication on top of that to replicate/mirror the data to an offsite building that is still on the local LAN as a DR solution to a SAN failure.
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Jan 14, 2007
I'm using replication and want to mirror my publisher to get high availability. As I understand the documentation the principal and the mirror must both use the same distributor instance. So if the distributor fails the replication fails. This seem like a big weakness. Maybe I'm missing some thing. Is there a way to set it up so that replication continues if a distributor fails -- some mechanism that will switch in a "back-up" distributor? I'm looking for a configuration that will continue to run in the event of any single failure. This means that both the publisher and the distributor must be covered by mechanisms that keeps them going in the event of a failure. Mirroring covers the failure of the publisher but I don't see a mechanism that will conver the failure of the distributor.
My application is developed in .net / c#. Data is accessed through .net sql server data provider etc.
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May 14, 2008
Hello y'all,
Can someone tell me what's the main difference between mirroring and replication?
Thanks! Kindest Regards
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Feb 14, 2008
Looking for anyone that has had any experience with using SQL Merge replication while mirroring the publisher database. Thinking about doing this as a recovery plan in the event of a publisher failure.
Any advice would be appreciated.
Thank you!
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Dec 28, 2006
After reading about it, i'm still confused. Is replication and database mirroring the same? they seem to accomplish the same thing.
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Jun 21, 2007
Hi all,
Can a publisher be mirrored? What are the implications, issues, gotchas? Transactional, Merge or Transactional w/ Updating Subscribers is what I'm considering.
Bottom line is I would like to use mirroring, but only one mirror will not suffice.
Thank you in advance.
Ray Nichols
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May 8, 2015
We are doing Reporting for a transaction system. since we do not want to hamper the live database we are planning to do the transactional replication.
Few questions for transactional system.
1. If we replicate a database , then what ever changes happened for the source db will be transferred automatically?
for ex: If i change a column name of a table in source system, then will it transferred automatically to the replicated db?
2. If we do any change to any of the tables in source system, do we need to recreate the replication and reload the entire data?
3. Also we are planning to enable cdc on this replicated db to enable incremental load to my warehouse. So if we disable the cdc and do a full load into the replicated db, then do we need to perform full refresh on warehouse?
4. Can we replicate on a table level? so that if we reload only the changed table and then reload then there wont be any impact on the over all flow of other tables.
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Jan 11, 2008
Here is the situation we are trying to resolve. The client has 2 locations, each has local appliations running on a database. db schema on both locations are the same, data is different and won't overlap.
The requirements are:
1. at each location the application can read and write
2. near zero down time for applications on each site
3. db on one site also has the data from the other site for DR purpose
The client is running on SQL 2005 STD SP2
We looked at the approach of setting up db mirroring on each location + 2-way transactional replication between both locations. The mirroring was fine, and I was able to set up transactional replication from mirrored publisher to a non-mirrored subscriber. But, from what I experienced and from reading, there is no way to have the subscriber db to be mirrored, since Distribution Agents simply doesn't have the option to specify Failover Partnr for mirroring, so I guess it is not supported. Any comments on that?
Assuming that's correct, then the only way of using SQL out-of-box technique seems to be using Clustering on each location instead of mirroring, then the 2-way transactional replication works on clustered subscribers I think (although I haven't tested it). Peer-2-Peer replication would have been a good candidate between sites in this case, but STD version of sql 2005 ruled that out.
Any suggestions and comments are welcome.
Thanks
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Sep 20, 2006
Hi everyboby,
Can anybody tell me the differences, advantages and disadvantages between these three solutions? When do I may use one or another?
Could you recommend me any documentation?
Thanks a lot,
Radamante71.
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Sep 28, 2007
I am developing an enterprise class solution using SQL Server 2005 and MS .NET v2 and am tying determine if SQL Server 2005 (which edition and if so how) would be adequate for my proposed solution. Any feedback, tips, comments would be greatly appreciated.
As a background the solution I am developing will be web services based and used by multiple offices around the globe by over 500 users. I have already developed a prototype using a single SQL Server 2005 instance but as this solution is going to be used by offices around the world I want to have an IIS Server and SQL Server 2005 server instance in each office with "links" back to the primary SQL Server 2005 cluster in Australia.
One of my thoughts was to set up replication between the offices that would happen at midnight remote office local time and then set up triggers to update the primary cluster when assoociated data was changed on the remote sites or on the primary cluster. Does anyone know or can anyone suggest alternatives to this strategy?
I effectively need some sort of inter site caching functionality with store and foreward capabilities ...
Thanks
Andrew
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Aug 8, 2006
Up to now we have gotten by without having any local DR copies of servers (if a sql server goes down we are usually able to get it back in less than 3 hours). But I want more now. I want to trim the "down" window to no more than 5 or 10 minutes. (Immedate failover would be nice but is not an essential requirement. The essential requirement is to loose no data!)
I have a spec of knowledge in these areas:
SQL 2005 Clustering (requires approved hardware, quorum disk, etc. involved)
SQL 2005 Replicaiton
SQL 2005 Log Shipping.
SQL 2005 Database mirroring. ( needs three servers)
Which approach do you think is the most straightforward, sparing of hardware, yet reliable way to get us back up and running after a sql server failure.
TIA,
barkingdog
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Mar 12, 2007
I want to create a mirrored DB set for data entry in a extremely busy OLTP DB. I want to add transactional replication between the production server and a staging server outside my quorum that I will use to index the data and prepare it for reporting and warehousing purposes.
If/when fail-over takes place, what happens to my transactional replication between the former production sever (now presumably offline) and my staging DB? Does it switch to the new production server automatically or do I have to manually set the replication between the new production server and the staging DB?
Thanks in advance.
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Mar 22, 2006
You will all have to excuse my ignorance. I'm a developer who also doubles up as a development DBA. I am however not particularly knowedgeable about all the really important DBA stuff.
We've built a small BI solution using SQL Server 2000. Our problem is that our server is getting on in years (5) and doesn't really have enough disk space or grunt. We havce a number of summary cubes that we've optimised quite successfully but our billing line level cubes run to 60 million rows and, well, they're about as quick as a dead ferret. Especially given the stupid queries our data analysts keep running.
We have however proved our point. That this can be done and indeed SQL Server can do it. So we're now looking at some infrastructure spend and some new copies of SQL2005.
But i need some advice. Our user base is climbing through the roof, we originally had 10, now we have closer to 50 and at this rate it'll be a couple of hundred by the end of the year. We're using a plugin called XLCubed to deliver that data into Excel from the Analysis Server.
The OLTP database that sits behind it is fairly robust but we have a number of web based apps (mostly lookup systems) that want to use the nice shiny new accurate tables of data we have created.
So I'm looking at a fairly big server to hold the OLTP DB, this will also serve up live data to our web apps. Its worth pointing out that the source data system is a batch system that processes overnight so we load data from yesterday at 6pm each evening and process our cubes and stuff overnight. Thus the data is a couple of days out of date. Don't laugh they used to use MS Access and got one mangy data set a month so this is a massive leap forward.
I wanted to mirror the DB to another machine but I also want to have a separate Cube Server. I wondered if the cube server could use the mirror to read its data from as opposed to loading the Main Server (the mirror would be an identical box) we would also have a separate box running some of our other systems acting as the witness.
I also wonderd about exporting the Cubes onto file shares for use locally as opposed to via the server which is how they connect now.
We have been using Reporting Services and some of the queries the devs write are not exactly efficient. So I was also planning on clustering a pair of smaller servers into a reporting farm. Could I use another SQL Server to serve data up to them? Could I use a DB snapshot to copy the data required to this server? What are the time / size implications of using a snapshot and replicating it over each night?
Any suggestions for places to read up on this? I've looked at the MS marketing blurb and while its big on buzzwords its light on specifics. Like how it actually works and how you would actually configure it to do some of this and what the implications would be.
Any advice?
many thanks
Steve
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Jan 2, 2001
hi, If I want to make one to many relationship, I put the pk of the parent as a fk in the child . like this
customer table (cust_id, fname,lname)
customer_order table(order_id,cust_id,qty,price)
I do understant this, but what about look up table, can I consider cust_id inthe customer_order table as a lookup field to the customer table?
Thanks
Al
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Jan 10, 2005
I have new client we changed the file retention period on for log ship on SQL 2000. Now the files are not being deleted. I looked at all the sp's but could not finde the one that actually deletes the log file that was copied over. I could just rebuild log ship but this is on a prod box, was trying to figure out what and when the files get deleted, and by what sp
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Feb 15, 2006
This one is a needle in the haystack. I have a fairly robust Dell server running WIn 2003, 16 gig of memory, SQL SP3a using log shipping failing over to a local server and then back to my location across a WAN, using a vb6 app with about 60 users, a 24X7 shop Mon-Sat. 2 times in the past month the production server has created a corrupt log ship file which gets applied to my failover server and then corrupts the failover DB to both failover servers. Of course it is my 20 gig db and the only time I can recreate the failover is Saturday night. The production DB is not corrupt and is fine. Has anyone ever run into this before. Currently working with MS and Dell, but hoping someone had experience with this !
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Feb 22, 2007
Hi,
I tried many times checking "Save password" in connection manager editor. But everytime I open the editor again and I see the password field blank.
I took it as normal, and deployed my IS Package, It couldnt run because of login failed for user 'sa'.
How do I force IS to save password on any ProtectionLevel ?
Thanks,
Fahad
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Jun 26, 2007
Good day to the people who's reading this post!
I have some trouble with shipping my transaction logs to the secondary database be it on
another server or within the same server to another database instance.
Im using SQL Server 2005 workGroup editions with Service Pack 2.
Here are the problems that i encountered.
I do hope someone has bumped into such a problem and willing to help me out.
I tried on 2 separate servers (not domain environment) and also between 2 separate instances
(which is supposed to be simple!) on
our development server,but was unsuccessful.
Between 2 separate instances on the development server -
No error after configuring Log shipping though.
The configuring went through and it was a success.
Transaction logs was backup every minute and it got copied over to the other folder.
But SQL Agent not doing its last job which is supposed to restore to the secondary database on
another instance.No errors given out in SQL Agent error log files.Anywhere else im supposed to
look to see if there are errors given out?
Both instances SQL Agent has the same log on username and password with Administartive rights
So what went wrong?
Between the 2 servers-
The transaction logs was backup every 1min on the primary server
but it didn't got copied over to to the secondary database.
- Error message given was:Error in restoring database to the secondary
database.Network path given could not be found. Can't open the AxTest.bak file.
(i am very sure i have type the correct network path,even have shared it out and i think the firewall
is blocking incoming traffic since unlike our development server,
which allows us to access when we use Start>Run and type in the ip address,user name
and password,the primary server will only tell me no network path was found)
I also believe it's because the SQL Agent on the secondary database server wasn't given
permission to access the primary database folder.
I've shared out the drive and folder on the secondary server and
even have allowed SQL Agent to read,write and modify on both servers.
For the primary and secondary SQL Agent,
I configure their log on to be the same user account name and password
which have administrative rights.
So what went wrong?
Isit really true that both servers have to be in domain environment before you can configure log
shipping,mirroring and replication?
Hope someone help me out of this predicament.Thank you in advance!
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Sep 24, 2015
I'm looking at a setup where they have server1 and server2 in a mirroring relationship with automatic failover.
Server1 is the principalThey are using transactional replication to replicate asingle databse to server3 is AWS.Distribution database is on Server1All Agents (log reader, snapshot, distributor) run on Server1Server2 has not been set up for replication...My understanding is that in this set up you would normallly place the distribution database on a separate server and enable publication on the mirror, Server2.
What happens if they failover? Replication would stop, and presumably records added while the mirror is the active database would not be marked for replication?How would they recover? Failback and reinintialize
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Mar 5, 2015
I've a SSRS report with the details in regards to shipping information. Currently in my report the 'Scheduled Ship Date' is set to following Monday, if we miss the 'Requested Delivery Date'. However, I need to change this report to set shipment date('Scheduled Ship Date') to Tuesday and Friday for the shipment having 'Requested Delivery Date' for this week or next week(current week and next week).
For example- Jobs that have shipment date between 3/1/2015 - 3/7/2015 will have 'Scheduled Ship Date' as Tuesday and Friday of current week. If we miss the shipment for this week it should be scheduled for next Tuesday(3/9/2015) and Friday (3/13/2015). I need to follow this for current week(3/1/2015-3/8/2015) and following week(3/9/2015-3/15/2015) and after that all the following weeks will have 'Scheduled Ship Date' as Tuesdays.
Below is the SQL:
USE tempdb;
GO
DECLARE @Date datetime;
SET @Date = GETDATE();
--SET @Date = '2014-07-25';
DECLARE @TEST_DATA TABLE
[code]....
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Jun 14, 2006
Hi,
If I perform a point in time restore on a database that is currently a primary log shipping database, will the rollback be reflected on the secondary servers or are extra steps neccesary to accomplish this?
Thanks.
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Mar 16, 2007
I was wondering how I do to insert values in two tables that are related each other by a FK?
That is the procedure that illustrate what I meant to be.
ALTER Procedure [dbo].[new_user]
@master nchar(10),
@nick nchar(10),
@fish nchar(10),
@e_mail nchar(30)
As
Begin
INSERT INTO users
(nick, fish, e_mail)
VALUES (@nick,@fish,@e_mail)
INSERT INTO friends
(user_id, e_mail)
VALUES ( Select user_id from users where nick=@master,@e_mail)
End
Thank you very much.
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May 19, 2007
If I wanted to make a report that shows different fields, one being cost, but I only wanted certain people to see cost based on their AD groups, is there a way to hide this information?
Basically, domain/user1 belongs to AD purchasing group purchasing, he can see item, description and cost, where domain/user2 belongs to sales so he can only see item and description?
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Jan 15, 2007
I want to build Parent child relation . i have two aproaches .I would like to know which is the best solution ?
1)1st method:-
Parent table with parent id . Child table with child id and parent id.Foreign key relationship exists between parent and child tables with cascade delete option enabled.
Parent TAble
Id name
1 XYZ
Child table
id name parent id
1 abc 1
2 qwe 1
2)2nd method
table with id and parent ID. Top level element will have null value in table. eg
id name parent id
1 xyz
2 abc 1
3 qwe 2
4 adf 1
Retrieve data using recursive queries supported in SQL Express.
Which is the best solution to store parent child relationship???
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May 3, 2008
Server A = primary SQL DBs (mirroring origination)
Server B = failover SQL DBs (mirroring destination)
For database mirroring a witness is required.
Can the witness live in another instance of SQL on server B?
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Apr 4, 2007
Does SQL have a function that return "null" for records which don't exist? Per example in a FK relation ship, that not all records in the first table have a "child" in the second table, so it returns null records.
Thank you very much.
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Mar 24, 2015
I've a SSRS report that reports the 'ScheduledShipDate' based on 'Requested Delivery date'. Currently, on my report 'ScheduledShipDate' is set to Monday of each week since we ship every mondays. I need to change the 'ScheduledShipDate' since from now the ship date will be Wednesday, Thursday and Friday of each week. Here is my DDL.
USE tempdb;
GO
DECLARE @Date datetime;
SET @Date = GETDATE();
--SET @Date = '2014-07-25';
DECLARE @TEST_DATA TABLE
(
DT_ID INT IDENTITY(1,1) NOT NULL PRIMARY KEY CLUSTERED
[Code] ....
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