Backup and restore

Sifiso W. Ndlovu

Two methods for restoring a data warehouse/data mart environment

November 8, 2016 by

Implementing best data warehouse designs and practices such as data lineage reduces the need to ever have to restore an entire relational data warehouse. However, sometimes there are instances whereby you have inherited poorly designed data warehouse environments that leaves you with no other options but to perform an entire database restore in an event of a sudden disaster. I recently found myself in a similar situation of having to recover one of my data mart following a data integrity issue wherein all data of a type 1 dimension was updated/overwritten using an incorrect source file. In this article I take a look at how different approaches can be utilised to restore the compromised SQL Server-based data mart back to its “good state”.

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Aamir Syed

SQL backup reports with PowerShell

August 15, 2016 by

Let me preface this post by saying that this was a process that evolved over time. It started as a simple sql statement that emailed me a csv file. From there the actual SQL code evolved to display cleaner results. When I learned what powershell could do, I spent some time learning it during my lunch breaks at work. Even when I implemented a powershell script for the first time, it still wasn’t a clean looking report, but it was still better than what we had prior. Even now there is room for improvement but I am happy with the results and hope that it can provide some help to other SQL DBA’s out there.

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Sifiso W. Ndlovu

Meaning of the 5127 database snapshot error code

April 15, 2016 by

Long before I turned to Data Warehousing and OLTP replica environments such as Operational Data Stores as a form of data redundancy strategies, I had been using database snapshots. During that time, the analytics and reporting teams were directed towards a database snapshot as a data source for their development. Another benefit of having a database snapshot, is the ease of knowing that should unintended changes be committed in source, you could easily revert the operation by restoring source database off the snapshot.

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Shawn Melton

Analyzing SQL Server backups

March 8, 2016 by

Introduction

Database backups are important and always something you should have in any environment. Outside of needing them to restore a given database they have some information that can be useful in certain situations. One situation I found them convenient is with consolidation projects. If the databases are online you can obviously go to the source SQL Server instance to gather that information, but as a consultant I don’t necessarily have access to every environment. You may have the same issue if you are being brought into a project and your customer or department manager just wants you to advise on how you would setup the server. One easy request is to have them point you where the backups are stored and ensure you have access to the files.

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Kaloyan Kosev

MS SQL Server backup optimization

January 19, 2016 by

Backup and recovery are some of the most important DBA tasks, although they look simple enough and usually you setup them, leave them running on schedule and only come back if they fail – there is a whole new world in regards to optimization you can do to make them faster, better and … smaller.

But why bother? Considering that the modern databases grow at such fast pace you may face a situation where you are not able to fit in your maintenance windows or service contract obligations. Let us take a look on the three main areas where we can work on:

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Ahmad Yaseen

Backup SQL Server database to and restoring from multiple files

January 6, 2016 by

Introduction:

The SQL Server backup provides an important solution for protecting critical data that is stored in SQL databases. And in order to minimize the risk of data loss, you need to make sure that you back up your databases regularly taking into consideration the changes applied to your data. It is a best practice to test your backups by restoring random backup files to a test environment and check that the backup files are not corrupted.

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Murilo Miranda

Understanding backups on AlwaysOn Availability Groups – Part 1

November 30, 2015 by

Since the AlwaysOn Availabiliy Groups feature was introduced, we got new options to make the backups strategy more complete, but also more complex. Taking an advantage of secondary replicas, we can offload both, the FULL and even the Transaction Log backups from the Primary Replica to the Secondary, leaving the Primary replica dedicated to serve the production application.

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Murilo Miranda

Backups to Azure – How can I do this?

July 3, 2015 by

With the evolution of the Cloud, specifically talking about Azure, SQL Server team started to take advantage of the new opened horizon. We already discussed pros and cons of send backups to Azure, now let’s check how to do this!

Following the “Hybrid Scenarios series”, we already discussed about the connectivity options, and pros and cons of store our backup files in Azure.

In this article, we will specifically talk about the two options that we currently have, involving Azure: Blob Storage and Managed Backups.

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Daniel Calbimonte

How to work migrate backups, files and scripts to/from the cloud using the command line

May 26, 2015 by

Introduction

Sometimes we need to move our local files, SQL scripts, backups from our local machine to Azure or vice versa. This can be done manually by accessing to Azure and using a browser, but there are other methods to automatically do this. This article describes the Microsoft Azure Storage Tool. This is a command line tool used to upload data to Azure from a local machine or to download data from Azure to our local machine. The article will describe step by step how to work with this tool.

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Steve Simon

How to automate SQL Server database restores

March 30, 2015 by

Introduction

A few days back I encountered an interesting challenge. The client wanted to have copies of the nightly backups of the transactional databases restored on a warehouse server, to be utilized to update the warehouse.

The over all process

Prior to the pushing the daily backup to the warehouse server, the previous days restore is deleted. The important point being that the “SQLShackFinancial” database is no longer present on the warehouse server. Having been deleted, downloading of the backup file begins and the restore of the current backup version begins. Normal warehouse processing then ensues and so the cycle continues.

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Derik Hammer

Backup testing with PowerShell – Part 2: Reporting results

October 22, 2014 by

Now that Karla’s restore process is mature, it is time to pre-stage the means of reporting on these events. Two major actions have been taken for each database tested. First a restore operation occurred. The restore operation validates that the backup file is well formed and that there is nothing wrong with the data which would cause a failure. Next CheckTables was executed to thoroughly inspect for data corruption and any consistency errors. Each of these two actions will have their own methods of providing evidence of successful completion. Recall the requirements set by Karla, in part 1 of this series, for the reporting piece. Read more »

Derik Hammer

Backup testing with PowerShell – Part 1: The test

October 21, 2014 by

Karla is a production database administrator and she has a lot in common with you. Being responsible for database backups and recovery, she has implemented a well-structured automated backup system. Maybe she’s using Ola Hallengren’s Maintenance Solution, custom T-SQL stored procedures, or a set of PowerShell scripts. She has heard the saying, “a DBA only needs one thing, either a backup or a resume, but never both,” and is confident that she won’t be dusting off the resume any time soon. Read more »

Ivan Stankovic

SQL Server backup – models and types

May 26, 2014 by
A SQL Server backup is one of the most important features DBAs should fully understand and use. It’s not uncommon that the process of backing up SQL Server data is considered as simple and therefore easily overlooked as essential when it comes to disaster or other recovery scenarios. Realizing that a backup is not valid (outdated, corrupted, or even does not exist) at the moment when it’s needed is highly undesirable scenario for any DBA. Read more »