Questions tagged [backup]

Making copies of data which may be restored after a data loss event or to recover data from some earlier point in time.

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16
votes
2answers
35k views

Can I restore a SQL Server .bak files without SQL Server?

I have some large .bak files from a SQL Server 2005 dump. Can I restore these without using SQL Server, either to PostgreSQL, MySQL, or to flat text files? An open source solution would be most ...
16
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1answer
19k views

Does mysqldump -all-databases include all objects

Does mysqldump -all-databases include all objects ? I have to migrate all databases to new server.
16
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7answers
73k views

Error 3154 while restoring a backup using WITH REPLACE

I have SQL 2012 with SP1 installed on my computer. I made a backup of a database test.bak. I have a database with the name test2 which is the same database, but the data changed. I want to restore ...
16
votes
1answer
1k views

Sql Anywhere 11: Restoring incremental backup failure

We want to create remote incremental backups after a full backup. This will allow us to restore in the event of a failure and bring up another machine with as close to real time backups as possible ...
15
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5answers
18k views

How can I create readonly user for backups in PostgreSQL?

Is it true that it is IMPOSSIBLE to create a readonly backup user in PostgreSQL? I've been advised on an IRC channel that you simply can't have a backup only user with no ownership privileges. I ...
15
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2answers
4k views

10 TB database backup / restore Question

We have a very big production database which is 10 TB. We are considering migrating it to a cloud service, but I have to understand the risks and estimate the duration of the whole process. I backup ...
15
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5answers
2k views

Backing up & restoring 10-20 SQL Server databases to a ~synchronous state?

I need to backup up 10-20 SQL Server 2008 R2 databases with sizes between 10-50 GB, while they are online and used simultaneously by a single enterprise app. I also need to restore them to a state ...
15
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3answers
649 views

Transaction Log Backups Serial or Parallel?

We happen to be using SQL Server 2012 Standard Edition. I also happen to use Ola Hallengren's scripts to provide an easy, more flexible framework for doing backups and maintenance. This question isn'...
14
votes
1answer
21k views

What are the optimal mysqldump settings? [closed]

After some search I ended up with the following settings: mysqldump\ --host=localhost\ --port=3306\ --databases ****\ --user=****\ --password=****\ --default-character-set=...
14
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2answers
19k views

How to backup large MongoDB database

What is the recommended way to back up large data sets in MongoDB? Let's say we have a data size in the order of 10TB - how would you back that up? We're considering a hidden, possibly delayed, ...
14
votes
5answers
9k views

Attach/detach vs. backup/restore

I need to transfer the database (as a whole) to another server, to make a duplicate database to setup another test environment. I have two choices: Make a full backup at source server/restore at ...
13
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6answers
40k views

Taking backup of all the databases in SQL Server

I have a Microsoft SQL Server 2005 DB server. In the DB server, I have around 250 user databases. I have to take a back up of all these databases. Since, manually taking backup consumes lot of time, I ...
13
votes
1answer
2k views

Temporarily moving a SQL Server 2016 database to SQL Server 2017 and then moving back. Is it possible?

If I take a backup of a database from a SQL Server 2016 instance and then restore it to a 2017 instance to do some work on it. Can I then turn around and back up that database from the 2017 instance ...
13
votes
1answer
14k views

Why do we use FILE = 1 in scripts for restoring a database

Recently when I came across the script for restoring a database, I got a doubt on why we have to use "FILE = 1"? Can't we restore a database without that statement!? Basically, what it is used for?
13
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3answers
4k views

Backup internals - What happens when a backup job is running - in terms of locking and performance overhead in SQL Server?

For MySQL I know the database is backed up table by table in SQL Statements, this results in locking and if you update columns while backing up you might end up in integrity problems. To my ...
13
votes
3answers
15k views

pg_restore: [archiver] did not find magic string in file header

I'm using PostgreSQL 9.1 and want to restore backup files generated with pg_dump: sudo pg_dump -h 127.0.0.1 -U postgres --clean --inserts -E UTF8 -f out.sql database_name This command generates a ...
13
votes
1answer
1k views

Differential Backup Issue - Why? Is this Possible?

I am using SQL Server 2014 and this is the situation: I have server A and server B. Overnight ETL is processed on server A. After the loading process completes, database X gets backed-up (with ...
13
votes
3answers
17k views

How best to maintain SQL log file sizes

I'm somewhat of a new DBA and I'm managing a SQL Server 2012 instance that has a fair amount of activity. I'm running in Full Recovery mode because we need point in time recovery. Right now, I'm ...
13
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3answers
1k views

Restricting users to COPY ONLY backups

I am looking to deploy log shipping in my production environment. This will mean I will have to manage backup chains which could be disrupted by people taking backups to refresh development ...
13
votes
5answers
42k views

How to detect any changes to a database (DDL and DML)

There are a lot of databases on my client's SQL server. These databases are under development, so developers can design, refactor, do data modifications and so on. There are some databases that change ...
13
votes
2answers
82 views

Why do my Batch Requests increase when doing a Differential Backup

I have started doing some long-term tracking of various activities on our 2012 SQL Server and I have noticed an increase in Batch Requests during our incremental backups. To give an idea, normal day-...
12
votes
5answers
620 views

SQL Server Backups - A couple of questions

We run our weekly backup job at 9pm on Fridays and we are experiencing a couple of issues with regard to disk space (which gets perilously low at times) and performance. We're looking at streamlining/...
12
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2answers
22k views

Why do we need to backup Oracle archive logs along with datafiles

Oracle® Database Backup and Recovery Basics 10g Release 2 (10.2) says that Archived redo logs are the key to successful media recovery. Back them up regularly. But, I wonder, why backups of ...
12
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5answers
14k views

How do I copy my SQL Azure database to a local SQL Server instance?

I have an OLTP database hosted on a SQL Azure instance. I want to pull a copy of the database down from the cloud so I can run some heavy extracts and OLAP-style queries against it without impacting ...
12
votes
2answers
625 views

During a log backup is the data backed up to the start or end of the operation?

Say I am running a log backup, and that log backup takes 10 minutes to complete. During that 10 minute window, further transactions are run. Given the below example, which transactions does the log ...
12
votes
1answer
10k views

SQL Server Transaction Backups vs Logs

I've inherited a moderately-sized business-critical SQL Server 2008 database and am trying to wrap my head around backup planning. (I'm a developer, not a DBA.) The way our system is set up right now ...
12
votes
1answer
43k views

Difference between database dump (export) and database backup?

What is the drawback using only EXP or EXPDP command for a database dump (and considering it as a backup) instead of taking backups using BACKUP DATABASE command (via RMAN)? What is a difference ...
12
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4answers
1k views

Keeping (Partial) Backups Small when using SQL Server FILESTREAM

I have a database with nearly 1TB of FILESTREAM data that I don't need backed up (if the data was deleted it'd be recreated automatically in a couple of hours, so it just isn't important). Most of the ...
12
votes
2answers
7k views

Tool to export data with all relational data? [closed]

Is there a tool to export data from selected rows in a table with all data stored in other tables in other tables linked by relational design? The purpose is to ease migrations of bits of data ...
12
votes
3answers
8k views

Understanding the impact/risk of turning off “verify backup integrity” on SQL backup

Currently we use standard maintenance plans for backups on the SQL Server 2005/2008/2008R2/2012 servers in our environment, and the "Verify backup integrity" box has always been checked. Some of the ...
11
votes
4answers
1k views

Alternatives to Network Backup

In our environment we have some servers that are in an Always On Availability Group, and some that are standalone. We normally backup to a network share, but we have recently observed that as the ...
11
votes
3answers
60k views

“Database is in transition” Error

Today I was trying to restore a database over an already existing database, I simply right clicked the database in SSMS --> Tasks --> Take Offline so I could restore the database. A small pop up ...
11
votes
2answers
5k views

Can't find process that is creating backups

We have an instance of SQL Server 2008 installed on a customer server. The customer's IT department is in charge of the various backups of the machine. The SQL Server log shows there is a full backup ...
11
votes
2answers
3k views

SQL Server transaction log backups: test whether tail log follows last known log backup

We are using SQL Server with full recovery mode. Given a full backup and a series of log backups, we would like to be able to check whether the log chain is complete from the last full backup to the ...
11
votes
2answers
1k views

A Non-DBA Asks: How to Painlessly Copy/Move a SQL Server instance to another Server via Backup/Restore?

We've just got a new server so I need to copy the existing SQL Server 2008 instance over from the old db box. I normally do this by copying .mdf and log files over and attaching them but I'm not able ...
11
votes
2answers
6k views

SQL Server 2008 R2 Restore COPY_ONLY full backup with transaction logs

After doing some research I cannot seem to find an answer to this question. Background I am attempting to setup a backup plan that fits the following three requirements: Reliability of backups, ...
11
votes
1answer
5k views

What is the difference between XtraBackup and rsync?

Yes, I'm going to run strace on them both... However, I would like to know ... What is XtraBackup is doing over and above rsync -ac src dest ? What's so special about XtraBbackup ? How is XtraBackup ...
11
votes
5answers
3k views

Using third party tools to backup

Is there any advantages to use Third Party Tools to make Backups ? I'm not referring one in particular but I want to know if someone using them to DB greater than 200 GB. Servers are mostly MSSQL ...
11
votes
5answers
14k views

Incomplete mysqldump

I'm trying to run mysqldump to create a database snapshot, and I'm finding it will randomly stop midway, without reporting any error. My database is relatively small (about 100MB) and is using InnoDB. ...
11
votes
2answers
45k views

SQL Server backup failing. Error: 3041, Severity: 16, State: 1

First of all, I'm very new at stackexchange, so please bear with me. I'm running a SQL Server 9.0.4060. My problem is: my SQL Server backup keeps failing on a lot of the databases. The Maintenance ...
11
votes
1answer
2k views

Restoring differential backup creates DEFUNCT log file?

Here is my problem. I'm trying to move a database to a new server via a full restore, then cutover with a quick differential backup/restore. I can do a full restore without a problem, but when ...
10
votes
3answers
29k views

Why is a .bak so much smaller than the database it's a backup of?

I just took a backup of a SQL Server database. The MDF and LDF files together total around 29 GB, but the .bak file was only 23 GB, about 20% smaller. My first guess when one version of a set of ...
10
votes
7answers
6k views

Pros and Cons of SQL Server back up strategies and their appropriate usage scenarios

From what I can tell, there are three possible ways of backing up your SQL Server database Full backup Differential backup Log Shipping What are the pros and cons of each strategy and in what ...
10
votes
6answers
520 views

Backing up SQL DB more frequently

I currently have a scheduled task that fires off each night at 2 AM that calls SQLCMD.exe and passes it a .sql script to run for the backup (shown below). We're a pretty small company with growing ...
10
votes
3answers
8k views

Will the transaction log shrink automagically in SQL Server?

When SQL Server database in a SIMPLE mode, you don't have to care about the transaction log bakcups. But in a SIMPLE mode, the transaction log seems to grow as it does in FULL mode. Does is truncate ...
10
votes
2answers
13k views

How can I dump all tables to CSV for a PostgreSQL schema?

I have a database with a lot of schemas in it and I want to dump the each of the table contents to CSV. I'm aware of the COPY command but I'm not sure how to script something that will read all of ...
10
votes
2answers
3k views

Does taking transaction log backups every 15 minutes consume more disk space than log backups every 6 hours?

In our environment the network storage is low on space. At the same time I would like to make sure that we take transaction log backups every 15 minutes instead of current every 6 hours. My question ...
10
votes
3answers
3k views

Backing up multiple databases to the same point in time

Usually when we start the backup we do not allow changes to commit or database will be not be accessible. I mean database will be in single user mode but I want to start the backup and release the db ...
10
votes
3answers
2k views

What is the use of restore headeronly when performing a backup?

When I monitor my backups with the following query: SELECT command, percent_complete, 'elapsed' = total_elapsed_time / 60000.0, 'remaining' = estimated_completion_time / ...
10
votes
5answers
25k views

User Permissions Messed Up following a Backup -> Restore Operation

I had to move several SQL Server 2008 databases to our new db server so I backed them all up (to .bak files), copied these files over to the new box and restored them (all done using SQL Management ...