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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11
votes
5answers
17k 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
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2answers
28k views

Will mysqldump command also backup all the views that are present in DB or there is a special command for it?

I am trying to backup my entire database along with the views. I am going to use mysqldump command. I was wondering if that will copy all the views or I will have to use separate command for it. ...
11
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4answers
34k views

How to increase fast backup and restore of 500GB database using mysqldump?

There is a database A size of 500GB. Tables in database A contains both MyISAM and INNODB tables. MyISAM tables are master tables and Innodb tables are main transaction tables. Backup and restore ...
11
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2answers
49k 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
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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
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6answers
542 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
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4answers
20k views

Do I really need to keep .LDF files?

Each month we make an end of month snapshot of our production database. These month end snapshots are strictly for reporting purposes, there are no inserts, updates or deletes ever done on them. Each ...
10
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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
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2answers
33k views

What is the most effective way to compress and store a SQL Server backup? [closed]

I've been doing some testing of different methods for compressing and storing SQL Server backups (using SQL Server 2008 R2 Enterprise edition), and I'm wondering what the most effective compression ...
10
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2answers
4k 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
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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
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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
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3answers
3k views

Database backups in Oracle - Export the database or use other tools?

One of the "practices" that I've seen about being performed by DBA's in my organization is to treat a full database export using tools like exp / expdp as backup. Would this be a good practice ? What ...
10
votes
3answers
20k views

How to log error details when using using try/catch for dynamic SQL backup commands

When issuing a backup command within a stored procedure that uses a try catch and dynamic sql, the error messages are very general when compared to running the backup command directly. Try/Catch ...
10
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2answers
20k views

MySqlDump's DISABLE KEYS have no effect on import

I have a follow up to my previous question regarding import speed with Inno-Tables (surprise!). Scenario I try to import some big* database dump on my local dev machine in reasonable time. We have a ...
10
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3answers
11k views

How to delete a Backup from a backup set in SQL Server 2008 R2

The title pretty much sums it up. We are running out of space on our backup disks, and need to remove old backups out of the set. I can't seem to find any information on this.
10
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5answers
9k views

Determine when a PostgreSQL database was last changed

I'm looking at altering how backups are done and am wondering if there is a way to determine which databases in a postgreql cluster have not been recently changed? Instead of using pg_dumpall, I'd ...
10
votes
1answer
48k views

I/O is frozen on Database & also I/O was resumed on Database on daily basis in log with complete Backup

I would like to say that as on daily basis i got the message in my log file. First The I/O is frozen on Database (DatabaseName) message appears in log. The message is like I/O is frozen on ...
10
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2answers
16k views

Microsoft SQL Server 2008 R2 backup error

I'm trying to do a simple backup to an external disk and getting this error: Backup failed for Server 'Server-name' Additional information: System.Data.SqlClient.SqlError: The media loaded on "...
10
votes
1answer
2k views

Identify root cause for why database is stuck in RESTORING state

I know there are questions which solve the issue of a database being stuck in RESTORING state and have used those solutions to manually bring the database back online, but my scenario is somewhat ...
10
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1answer
27k views

Restore encrypted database to another server

I'm using a product which runs on SQLServer 2008. Understandably the company supplying it don't offer SQLServer support. When I installed the product I specified a password to encrypt the database. I'...
9
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3answers
6k views

Understanding CleanupTime in Ola Hallengren's SQL Server scripts in relation to FULL backups and LOG backups

I am having trouble understanding what exactly to expect from the CleanupTime option in the Ola Hallengren Server Maintenance Solution. I'm finding some related questions, and elaborate answers, but ...
9
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2answers
7k views

Mongodump affects app performance really bad

We have quite a big mongo instance (150 GB) with no sharding, and our regular backup (mongodump) has a very significant effect on the app performance. Worse than that, due to the heavy use of mongo by ...
9
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4answers
1k views

How are SQL backups different from IT regular nightly server backups?

Our IT department backs up the entire server every night (an SQL Server instance is installed on this server), which should be backing up that server as well as the entire network, in case something ...
9
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3answers
5k views

Users complain that system runs slow when mysqldump is in progress

The MYSQL database (ibdata1) is of size 73 GB and is configured to run as a dedicated database server on Windows 2008 O/S for INNODB tables. We are running the backup using mysqldump mysqldump --...
9
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1answer
37k views

Query that displays backup information (successful and failed) SQL Server

I have two jobs that backs up two different databases. Job 1 backs up DB1 Job 2 backs up DB2 DB1 fails to back up due to low space on Drive 1 resulting to a Job 1 failure. To fix that issue, I just ...
9
votes
2answers
15k views

Make Postgres database temporarily read-only (for performing volume snapshots)

The PostgreSQL built-in backup mechanism isn't always very suitable. Sometimes, you want to put the application in a quiescent state, because it has external data with which you want to backup at the ...
9
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7answers
1k views

Scheduled backup task doesn't always backup all databases despite always saying job successful

I have a job in SQL 2008 that runs a stored proc to backup all databases. This runs daily via sql server agent job. It quits with success every day but some days it quits with success only after ...
9
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3answers
19k views

Transaction Log maintenance when switching to Simple Recovery

Background: I recently inherited 50+ SQL Servers with 450+ databases. The nightly backups are roughly 8TB and, needless to say, we're using more disk space than we'd like. All of the databases are ...
9
votes
1answer
2k views

Daylight Saving time

In my environment, there are servers running on native backup and Ola Hallengren plans. Our servers are a combination of 2008, 2012 and 2014. All the full backups are taken at 12am and log backups are ...
9
votes
3answers
11k views

Backup with mongoexport or mongodump?

For production backup, MongoDB recommends mongodump instead of mongoexport for accuracy of data. However, I would need to "scrub" data off a MongoDB database before backing it up. I am not aware of ...
9
votes
1answer
36k views

Dump of a mysql table on import replaced existing records

I took a dump using mysqldump.. mysqldump -u... -p... mydb t1 > mydb_table.sql Then I imported the dump in another database having same table, but different records.. mysql -u...-p... mydb < ...
9
votes
2answers
17k views

How do I show warnings when loading data created from mysqldump?

I've got a large .sql file with large insert into ... values ... statements. Many of these statements are generating warnings during execution. How can I get mysql to print the warnings? If it hit ...
9
votes
4answers
20k views

Verify mysqldump backup is corruption free

We've got a cron task backing up our Database using mysqldump - my main concern is corruption, short of manually importing and checking the backups each time whats the best way to check / verify a ...
9
votes
2answers
4k views

Performing data update operations while backing up a large SQL Server database

I have a large (in the tens of millions of records) database that I am going to perform a full database backup on. However, the database is large enough that transactions can start before and during, ...
9
votes
1answer
18k views

How can I recover data from the LDF file?

We are using SQL 2005 Express Edition. We want to read the data from the LDF file in order to restore some deleted records. We tried using a trial version of ApexSQL which helped us a lot. Instead of ...
9
votes
1answer
5k views

Need for backing up MySQL databases information_schema, performance_schema, mysql and phpmyadmin?

I know it's not necessary to backup the information_schema database, but what about the following databases (besides the user-defined databases)? performance_schema mysql phpmyadmin (So, in case of ...
9
votes
1answer
24k views

Best way to backup & truncate transaction logs on a schedule

I'm no DBA, but things being what they are, I have to wear the DBA hat and set up maintenance plans on my SQL Server instance. So for a while I've been having my SSIS overnight process run a Execute ...
9
votes
1answer
11k views

How can I fix “Cannot perform a differential backup … a current database backup doesn't exist”?

We recently switched to the FULL recovery model, with full backups being done every weekend, and differentials being taken every day. The problem is, the differential backups don't always seem to ...
9
votes
2answers
1k views

PostgreSQL PITR restore

I have a PostgreSQL 9.1 server running on a CentOS 5.8 32bit OS and I have enabled WAL archiving. On this server, there are three databases: databaseA, databaseB and databaseC. Someone deletes a ...
8
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7answers
7k views

SQL Server: why to use a backup device?

When taking backups from databases, is it "good practice" to use logical backup device for backup location? What is the benefit of using backup devices?
8
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2answers
722 views

SQL Server: can dynamic data masking be safe when providing a database backup?

I have a SQL Server 2016 SP1 with data that I am ready to share with a partner (developer), except for a few columns, example: email varchar(64) MASKED WITH (FUNCTION = 'email()') NULL I give the ...
8
votes
2answers
9k views

Large `mongodump` followed by `mongorestore`

I have a fairly large (~240GB) Mongo database that I need to transfer across a sluggish network and onto a new server. Traditionally for these situations, I've found that a mongodump followed by a ...
8
votes
1answer
587 views

Is it possible to determine the default Collation and server version of a database without a full restore?

I work for a company who regularly receives large SQL database backups from clients for support purposes. We support multiple SQL versions and collations, but currently have to manually confirm our ...
8
votes
2answers
29k views

Restore a SQL Server 2012 backup file in SQL Server 2016/2014

I have SQL Server 2012 backup files and want to restore these to SQL Server 2016/2014. Will it work? I need to find this out before I uninstall SQL Server 2012.
8
votes
1answer
6k views

How to Install postgresql-client-11 on Ubuntu 18.04

I need to use the pg_basebackup/pg_dump program on an Ubuntu 18.04 system to connect to a remote PostgreSQL 11.6 server. However, the current system only contains pg_basebackup 10.10 and the remote ...
8
votes
3answers
5k views

Backup SQL Server 2016 Instance Logins

I need to backup a Instance of SQL Server 2016, I already have nightly backups of desired databases however I need to backup the users and roles for the instance..... How can i do this? Built in job ...
8
votes
5answers
13k views

SQL Server 2012 always-on backup, full vs copy-only

I need a quick clarification on copy-only backup vs full backup as it pertains to transaction log numbering and restore if required. I have SQL Server 2012 setup with always on for multiple databases....

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