Best Practice For Upgrade Of Live Hosted Database?
Sep 11, 2007
I'm not sure this is the exact forum in which to ask this question, so if there is a more appropriate forum, please point me in that direction.
Basically I'm looking for advice and best practices for dealing with an upgrade plan for a hosted database. Here is the situation:
- Hosted software application (.Net)
- Uses SQL Server 2005
- When we upgrade the software application to a new version, there will be schema and data changes that need to be applied to the database
- For the software application, we have considered upgrading an offline machine and then switching old one instantaneously.
- For the database, I'm trying to figure out if we can keep everything live for upgrades, or if we should have a small amount of scheduled downtime to upgrade.
So we have identified 2 basic directions:
1) Keep the database live and apply the new script changes just after the application software is upgraded. This means zero downtime, but we'd have to design and test our application to be backward compatible, so that the new version of the application code could handle both the new schema design, and the old schema design. It seems that this option would add a huge amount of complexity because we would essentially be testing a 3rd app/schema combination.
2) Take a small amount of scheduled downtime and upgrade the application code and database all at once.
Obviously option #2 is the most desirable from a development process point of view, and #1 is the most desirable option from a business point of view (zero downtime).
So, I'm looking for some advice on this. Do most people take the whole system down? Are there 100% live systems that deal with this? Are there other approaches I'm not considering?
Any information would be greatly appreciated. Thanks.
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Jun 13, 2001
I need to create a DB version upgrade schema on client site that will preserve the existing data.
Provide the user with a patch that he can run on his database that wiil apply changes to his DB structure and keep the old data.
One approach that I am thinking of is to create a differential DB patch - a and apply that to the client database.
Is there any strategy any algorithm to do that. Can it be automated?
If there any accomplishments or approaches known on the subject?
I would greatly appreciate any ideas you can come up with.
Zaven
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Aug 1, 2007
Hi,
How do I insert data that I have collected in a local database onto a table on my online ie hosted database which is on a different server?
At the moment I am just uploading all the data to the hosted DB but this is wasting bandwith as only a small percentage of data is actually selected and used.
I thought that if i used a local DB and then update the table on my hosted DB this would be much more efficient, but I am not sure how to write the SQL code to do this!
Do I do some kind of
INSERT INTO sample_table
SELECT xxx
FROM origanal_table
Or is it more complicated than this?
Thanks
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Mar 7, 2008
I've tried everything. The CreateUserWizard works fine, but then, I didn't have to connect anything for that. I've tried both SQLServer and MySQL. Connection Strings are correct, everything is correct as far as I can see. I've followed every step many many times. I'm about to go back to the old style and use VB6, because this is just stupid. The error I get is "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)" If anyone could help me out with this I'd really appreciate it.
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Jun 28, 2012
I have a SQL Server 2005 database hosted by a provider that has about 500 databases on their site. I am running Access2007 on a Windows 7 Home Premium edition.
What I am trying to do is create a new Access2007 application and attach (i.e: Link) to the SQL Server tables. I am using SQL Authentication.
I have done this before where i attached via ODBC to Oracle, but it was on the corporate network - not on a hosted server. When i try to walk thru the Access process, it does not seem to let me give it the database name. I have the connection string i use in C# (for example: Data Source, Initial Catalog, UserID and Password), how to connect with Access2007.
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Sep 22, 2007
Hello,
I am working on an ASP.NET apllication which will work with sensitve data that needs stored as encrypted. The ASP.NET application and SQL Server 2005 will be hosted outside of our company.
My questions are:
When I create a database master key, a certificate and a symetric key to encrypt and decrypt my data, will I be able to use these (master key, cert and symetric key) in other databases (say my local development SQL Server 2005 instance)?
Is a managed hosting a better solution to have total control over the the keys in the database?
Is there a white paper or guidance document for security in hosted databases?Thanks
-Al
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Mar 18, 2006
Hello,
I would like to know whether is it possible to administer a database on a hosted site - i.e inserting some lines, executing a query. I normally access the files via ftp connection. And so far the only way I figured I can mess around with the database is to download it and change it on my desktop PC.
Thank You.
Tomáš Pajonk
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Aug 6, 2015
I want to restore a database (from an encrypted .bak file) - but *not* over the live original if you take my meaning. Encryption is the standard AES-256 that comes with Sql Server 2014 btw. I don't want the original touched/altered in any way. I would like to capture a success message if possible.I can extract the physical device name of the database in question using the following code:
SELECT physical_device_name, *
FROM msdb.dbo.backupmediafamily
WHERE media_set_id =(SELECT TOP 1 media_set_id
FROM msdb.dbo.backupset
WHERE database_name='MyDatabase'
AND type='D'
ORDER BY backup_start_date DESC)
I would like if the newly restored database was rename to something different than 'MyDatabase' (as shown above) and has different logs than the original. If possible, and capture a success message when restored.
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Apr 28, 2006
What is the best way to insert records into an SQL Server 2005 database that's being hosted with my website. The data will originate from customer sites as transactions. Do I connect to the hosted database using TCP/IP or do I create web pages that accept the data variables? This is all new to me!
I need this to happen unattended and 24/7/365
Thanks
Tim
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Jul 20, 2005
Hi allWe have a small database that we host on our own local server. In order toget the information into the database I have a VB program that collates theinformation from a variety of sources and then over our local internalnetwork writes it to the database tables.This information is then made available over the internet using thecompanies broadband connection. In order to alleviate bandwidth issues weare looking at paying for someone else to host the database.What I am hoping to achieve is to keep the VB software, but during the nightupload the data to the remotely hosted SQL server using say a series ofupdate statements. Does anyone know if this is possible, and will SQL Serverlook after the integratory of the data. Is there any issues with therelatively low speed of then Internet as compared with a local networkenvironment. The amount of data we are looking at moving is very little,some where in the region of a few hundred records per night split over about10 tables.many thanksAndy
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Dec 24, 2007
Hi everybody,
Currently we have a MIS application, developed in VB 6.0 - SQL Server 2000 platform, which is used by around 60 users in our office.
We are planning to host a website remotely, which would allow clients to place orders, track order status etc. on it.
Would it be possible to access our local SQL database from the remote website?
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Nov 2, 2007
I have a web app that uses two SQL Express databases. One of the databases is the membership database. I am deploying the app to a hosted environment. Here is my connection string:
<add name="Akamojo_APSNETDB" connectionString="Data Source=.SQLExpress; AttachDBFileName=|DataDirectory|Akamojo_ASPNETDB.mdf; Initial Catalog=Akamojo_ASPNETDB; Integrated Security=true; User Instance=true"/>
Here is the error that I get:
Could not open new database 'Akamojo_ASPNETDB'. CREATE DATABASE is aborted.
Cannot attach the file 'e:hostingmemberakamojoTournamentLogApp_DataAkamojo_ASPNETDB.mdf' as database 'Akamojo_ASPNETDB'.
File activation failure. The physical file name "c:inetpubwwwrootTournamentLogApp_DataAkamojo_ASPNETDB_log.LDF" may be incorrect.
The log cannot be rebuilt when the primary file is read-only.
The mdf file is not read only. In the hosted environment the database is on the E drive. In my dev environment the database is on the C drive. From the error message, it appears that when it tries to build the log file it is trying to build it on the C drive in a path that doesn't exist in the hosted environment.
Any help is greatly appreciated.
-Darrell
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Feb 1, 2005
have 2 databases in sql server 2000
Live
Dev
I need to append all the data from LIVE into DEV environment. I have tried using MS Access (linking tables & importing tables and running APPEND query to update the rows from LIVE to DEV but PK & FK is causing problems as some data will have the same ID's....
Could I use DTS--Access wizard in SQL Server.
What is the best option to use?
Thanks all in advance
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Oct 3, 2005
Hello all,
I hope someone can help with my current issue as i have now spent the last 8
hours trying to solve it! Here goes...
I am currently moving all my websites from our in house set up to a FASTHOSTS
dedicated server. Our in house set up consists of separate server for web
and data and works well even with my recent foray into .Net sites.
I have just moved the most recent of my .Net sites
(http://www.alfadealerads.co.uk/home.aspx) to the FASTHOSTS server and cannot
get the site to connect to the database (this has also been installed on the
FASTHOSTS server). One of the pages that connects to the DB is
http://www.alfadealerads.co.uk/links.aspx, where i am getting the error..
System.Data.SqlClient.SqlException: Cannot open database requested in login
'MasseratiChauffeurDrive'. Login fails.
Login failed for user 'lateral'.
This DB has been restored from back up from the original DB. I have
recreated the user name on the new SQL server and added it to the new DB
also. I am using a webconfig to connect to the DB, the exact same one
that works on my current live server
(http://www.maseratichauffeurdrive.com/home.aspx) only with the obvious change
to the SQL server name.
The only difference i can see in the 2 setups is that the new one has both the
webserver and the SQL server on the one machine and that machine uses domains.
My current in house setup does not use domains and as mentioned before web and
date are 2 separate servers.
Can anyone help? Or even understand what the hell i have written? lol
Thanks in advance
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Jun 3, 2015
SQL server, by-mistake I updated values of a column in a database hosted online, is there any way undo the transaction. I didn't created any backup of the database. I read that still it can be recovered through the .ldf (log file) but unable to access it. Is there anyway to get access of the Log file or is there any way to recover the data.
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Dec 7, 2006
Hello,
I haven written a Windows program in Visual Studio 2005. This program stores data in and retrieves data from a SQL Express database. The customer is starting to use the program and filling the database with data. However the program is still under construction (new functionality will be added) and so is the database (new tables, views etc. will be added).
Of course I could send the customer the new database, but than all data already entered will be lost.....
I'm thinking about using the SQL Management Studio Express and VS2005 to connect remotely to the database (a VPN connection is availabe) but worry about performance issues.... Or should I use some kind of replication / synchronization and how, because this is new to me.
What is the best way to solve this 'problem' ?
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Oct 19, 2006
I have a live SQL 2005 database that has ntext fields, when the ntext fields go over 4000 chars the record can no longer be edited. It throws a string or binary data would be truncated error. I tried turning text in row OFF, but it did not work. Can anyone forsee any problems with changing the ntext fields to nvarchar(max) in the live database? Also, I came across sp_tableoption N'MyTable', 'large value types out of row', 'ON', does this work for ntext also? sp_tableoption N'MyTable', 'text in row', 'OFF' did not do anything.Any help would be appreciated.
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Aug 2, 2007
hi.
I would wish to know whether it is possible for me to program the code from html or aspx ( from web hosting server ) to our office intranet database which is window server 2005?
I had tried to google for more info but there are too complicated thing for me to understand.
Actually i am doing the web form feedback form from the website for the public to fill in and submit. i am using the mysql from web server to store the records from the feedback form.
We have another database in our server, ms server 2005 to store records in the intranet office only. i need to get the records from mysql to intranet database. i don`t think there is a automated scripting which allow u to auto update the intranet database from mysql( web server )
So i thought of one thing . program html or aspx to insert records directly to our database intranet . but how ?
I appreciated that.
Regards
newbie on aspnet.
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Feb 5, 2008
Hi,Ive been building a project on a local server and now need to transfer the files and database over to the live server. I have managed to transfer the files quite easily, however I am having a few problems transferring the database using Microsoft SQL Server Management Studio. When I try importing data to the live database, all the data and tables are brought across however some of the values for the fields are lost. For example all the fields which had a primary key no longer have one, and all the set default values for the fields are also lost. Ive been considering just going through every table in the database and re-entering the correct values for the fields, but this seems a bit time consuming and I'm also concerned about possible errors which could arise as there will be an inconsistency.Another method I tried was copying the SQL query across which created all the tables and the correct values for the fields. However when I tried to import the data an error was produced as you cannot import data into a table which has read only fields etc..Does anyone know a solution?Thanks for your time.
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Mar 23, 2006
im using the the login controls with asp.net
when i test locally everything works great, its see the ASPNETDB.MDF file, checks the login info and passes the user on to the next page.However when i move the application to the live server it fails, it cant find the datasource that contains users/password etc. here is there error:An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) So im missing something here, im used to connecting directly to a remote SQL database and accessing the info from there.
Can someone point me in the right direction? Can the MDF file not be used off the server itself without SQL express installed? Do i need to migrate those tables into a real SQL database?Thanks,Sean
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Jul 31, 2007
Hi
I'm migrating from access to sql server 2005.
With access, I did full backups every 6 hours, by simply copying the .mdb file to a folder on another hard disk on the server, and then ftp it to a distant server.
I guess i just can't simply do the same with the SQL server .mdf file.
What is the best practice to achieve the same goal ?
Thank you
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Jan 31, 2015
I want to Replace The Big Log database with A new one ( A database with same structure).But current DB has many connection .
This is my plan :
1- Create a new database with same structure.
2- Rename current database to olddb with this code :
USE master
GO
EXEC sp_dboption CurDataBase, 'Single User', True
EXEC sp_renamedb 'CurDataBase', 'OldDataBase'
GO
3- Rename Newdb to current DB.
USE master
GO
EXEC sp_renamedb 'NewDataBase', 'CurDataBase'
is it true ? and Tsql code is ok ? (dont forget many of connection to curdatabase (that Is a log db) and loss some seconds data is not problems)
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Jan 24, 2007
Good Morning,
I work for a company that has sees alot of people come and go. The one thing I have noticed is that people use their admin accounts to log into SQL and create sp, views and databases.When the user leaves I am stuck with all these objects that are owned by somone no longer working for the company.
So my question to you guys is: What is the best practice to use in creating new objects?
Thanks for your guru-ness!
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Oct 7, 2015
Client is running X- version of application and corresponding database size is huge. Now client's vendor is releasing Y-version of same application with many database schema changes (like new tables added, new columns added, renamed existing columns and etc) To upgrade to the Y-version, vendor is suggesting to my client that down the system and do the upgrade for application/database to Y-version. We are sure that this process will take days together to upgrade to the Y-version. My client is not ready to down the system for that long. So we are trying to find the solution with minimal down time.The approach we are thinking is,
1) Create the replicated database to another server (server2) from production server(server1) using golden gate with X-version
2) Create new tables/schema updated tables from Y-version database on same server1. Here for Updated schema tables we are planning to use the name <table_name_Y_version> as the same table name exists in X-version.
3)With above 2 steps, golden gate replicate the changes from production to server1 and server1 will have the new Y-version table schema (with different concatenate name ' _Y_version'). BTW , there is no affect for the production
4) At this stage we are planning to find best approach, to fill the '<table_name>_Y_version' from X-version tables. two challenges here a) all data needs to be moved to Y-version tables b) they have to sync data in real time.
we thought of going to
a) ssis package to pump the data to Y-version tables, but real time data will not sync.
b) trigger based technique, previous experience said, lot of load
c) thinking about sql replication.
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Dec 27, 2006
Live Webcast tomorrow
Essential Team System for Database Developers
1 PM Central time 12/28
https://www.clicktoattend.com/invitation.aspx?code=112602
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Nov 17, 2006
Can you tell me what is the best practice for SQL database migration fromone DB server, to another one, new DB server. The old DB server will beremoved.1. Backup from old and restore all databases on the new server2. Export data and copy/import on a new server3. Something else...Thanks in advance for any good advice...Regards
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Mar 5, 2008
hi experts,
i have a postcode database that i need to update. the database cnotains of 6tables, the file i ahev has all the information at once, so i have to organize it and insert records into the appropriate tables.
this is the first time i'm doign this so i would like to know what the best way to do? do i need to create a stored procedure or a script, or may be something special and efficient that i do not know yet.
any advise will be very appreciated
thanks in advance
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Sep 26, 2007
Hi,
I'm currently building a database that is going to have at least 6 different types of users accessing it via a web application.
A user will have different information collected about them. A few of of the users will have the same or similiar information collected about them.
I will be using role based authentication.
Now my query is this;
Scenario 1:
Would it be a good idea to keep all the users common information in one table. Ie. thier username,email,password,name. Then create a tblDetails for each type of user that would contain the different data. That way i can just check one table to verify thier login credentials.
OR
Scenario 2:
Would it be best to create a seperate table for each type of user and then log them in based on the credentials stored in each type of users respective table.
Hope this is clear. I'm leaning towards scenario 1, although I've used scenario 2 before. Just wondering which would be preferred.
Cheers
RobC
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Mar 13, 2006
Hi,
I am new to working with Database using .net C#. i will really appreciate if someone can point me to a link where i can find best practices of working with sql express database with my c# web service applications.
preferably i would like to have answers for:
- to have one db or to have one for testing and one real db?
- db security
- use windows authentication or db user authentication
etc.
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Jul 27, 2007
With regards to time zones, daylight savings, and web users, is there a best practice for storing date & time information in a database?
For example, my databases are hosted in Time Zone A, but the web users are in Time Zone B. Then, when I create a rss feed (which is displayed in GMT), I add a third time zone into the mix for the same data. To date (no pun intended), I have been entering the date/time data in the time zone of the database server (Time Zone A), and then converting it using an application setting in the web.config file (i.e. TimeZoneBOffset = -1, GMTOffSet = -5). In other words, each time I display a date I calculate what it should be using the time-zone offset in the web.config. This also enables me to account for changes in day light savings, etc.
My concerns are three fold: 1. What if I move the database to another server and the time zone changes? 2. Right now the users are in only 1 time zone. If I expand it to several then the offset will have to be by users, which is do-able, but something I haven't had experience with in the past. 3. It is likely more efficient to calculate the time zone once on input into the DB, rather than in each use like I'm doing now. What time zone baseline for insert into the db should I use?
Thanks in advance for your help!
PS My application is primarily looking at 'smalldatetime' data - down to the 'minute' level.
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Feb 7, 2006
What's the best practice for adding / editing a record into a database with lots of fields ?I am not talking about the mechanics of it, as there are a lot of trivial examples using ADO.NET, stored procs, etc.
Deleting is easy, you just pass in (a few) primary key/keys to uniquely identify the record.
But in the real world when you have, say, a table with 100 fields! Do you code the INSERT sproc by hand, with 100 parameters... then call it with your ADO.NET code ? sounds like a lot of work to me...
What about updating! That's even worst, sometimes you may need to update only 3 or 4 fields, but using sprocs you would have to pass the whole 100 parameters in again, and "update" the whole record (when in fact you are only changing 3 or 4 fields).
With the update i could write different sprocs targeting only the fields i wish to update, but that sounds like duplicating work, vs having one generic update proc.
Sometimes i just feel like bypassing sprocs and having inline sql as it would be less work... but i know it is untidy.. and more potential to be buggy.
So come on guys (and gals)... let's hear your thoughts on how you would handle the insert / update scenarios when you have lots of fields ? Northwind examples are too trivial :-)
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Nov 16, 2005
I have finished a change request from our client. I need to update clients' database with the one in developments.Here is the changes i made to database:Added/Changed some tablesAdded/Changed some stored proceduresAdded data to some dictionary tableThe data in clients' current database MUST be kept. So how can I merge the changed information to clients' database?
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