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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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 ...
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3answers
19k 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 ...
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1answer
17k 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 ...
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5answers
8k 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
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2answers
22k 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. ...
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4answers
31k 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 ...
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
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1answer
1k 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
26k 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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4answers
21k views

mysqldump doesn't restore database. why not?

Why doesn't my restore operation work? I created a dumpfile for a database using: mysqldump -u root -p databasename > /home/databasename_bkup.sql I then opened the dumfile and confirmed ...
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4answers
16k 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 ...
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3answers
8k views

Why is .bak file size increasing/doubling with each consecutive backup on SQL Server?

I'm running a simple DB on SQL Server 2012 Express. Just today, when I backup the database, the .bak file size doubles to what it was from the previous backup just minutes before. I have done ...
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2answers
30k 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 ...
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
41k views

mysqldump --single-transaction, yet update queries are waiting for the backup

If I use mysqldump --single-transaction, according to the docs it should do flush tables with read lock to get a consistent state and then start a transaction and no writers should be waiting. ...
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 --...
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2answers
2k views

PostgreSQL Complete Database Backup [duplicate]

I've been trying to figure out how I can completely backup my PostgreSQL database. I have not seen any resource that explains how to do a complete backup. I am aware of the pg_dump and pg_dumpall ...
9
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1answer
6k views

MySQL dump restore - how to retain comments

So I have that complex MySQL dump as a backup. Unfortunately, that backup is complex and we use evil triggers. Some of our evil triggers had a comment lines starting with the # character. When I ...
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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
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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
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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 ...
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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.
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1answer
31k 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 < ...
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2answers
15k 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
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1answer
17k 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
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1answer
42k 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 ...
9
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1answer
4k 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 ...
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2answers
60k views

How to log verbose output from mysqldump?

You typically save the verbose output of a Linux command like this: # command > output.txt But when you use a command like mysqldump, the > option outputs the dump of the database tables to ...
9
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1answer
26k views

Can mysqldump dump triggers and procedures?

Is there any way of making a mysqldump which will save all the triggers and procedures from a specified db? Some time ago I read that mysqldump will also save my triggers, but it doesn't look like it....
9
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1answer
20k 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 ...
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2answers
965 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 ...
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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?
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2answers
607 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
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2answers
5k 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 ...
8
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1answer
526 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
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2answers
24k 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
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1answer
35k 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 ...
8
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3answers
3k 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
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4answers
12k 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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2answers
3k 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, ...
8
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1answer
167 views

Internals of backup compression with TDE (SQL Server)

Does anyone have any (inside?) knowledge of how backup compression works with TDE on SQL Server (version 2016+). In general I would expect compression of encrypted data to have minimal benefit, ...
8
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2answers
11k views

Slow MySQL Database Import with mysqldump and USE .. SOURCE

I have about 12 tables in MySQL innoDB, one of them has 11 million records in it. I used this command to back things up: mysqldump -u [USERNAME] -p [DBNAME] | gzip > [/path_to_file/DBNAME].sql.gz ...
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3answers
2k views

What Mechanism does MySQL use to schedule Backups on Windows Server 2008?

When scheduling database backups on MySQL Server (v5.1.45-community) running on Windows Server 2008, what mechanism is used to trigger the backups to run? I think it's using the Windows Task ...
8
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2answers
16k views

DROP PROCEDURE IF EXISTS not included in mysqldump

I'm dumping my stored procedures only using the following command: mysqldump --routines --no-create-info --no-data --no-create-db --skip-opt databasename -u username -p > outputfile.sql but the ...
8
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3answers
7k views

Changed max_allowed_packet and still receiving 'Packet Too Large' error

I use mysqldump to create a flat file for backup purposes. I have used this file to recreate the database on an alternate server. I ran the import process through ssh on the command line and I ...
8
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2answers
2k views

Shrinking a SQL Server Transaction Log

I’m currently having to deal with a SQL Server transaction log that has got out of control. Disclaimer: I’m not a dba and this isn’t my area of expertise so please bear with me. Currently I have a ...
8
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6answers
4k views

Moving large databases

I have a centos server and /var/lib/mysql/ is 125GB (disk has 1GB free space). Ordinarily I would use mysqldump to backup the databases, but I don't normally work with such large databases, so I need ...
8
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2answers
5k views

How do I shrink the physical Transaction Log file when it's the principal in a mirror?

We setup database mirroring over the weekend, and forgot to re-enable the job that backs up the transaction logs. When I came in this morning, the transaction log had ballooned to 58GB, and was taking ...