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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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173
votes
7answers
207k views

How can I optimize a mysqldump of a large database?

I have a symfony application with an InnoDB database that is ~2GB with 57 tables. The majority of the size of the database resides in a single table (~1.2GB). I am currently using mysqldump to ...
29
votes
5answers
90k views

Restoring a backup to an older version of SQL Server

When trying to restore a backup to a SQL Server Express 2008 database I got the following error: Restore failed for Server '...\SQLEXPRESS'. (Microsoft.SqlServer.SmoExtended) System.Data.SqlClient....
137
votes
13answers
248k views

How can I move a database from one server to another?

How can I move MySQL tables from one physical server to another? Such as this exact scenario: I have a MySQL server that uses innodb table and is about 20GB size. I want to move it to a new server, ...
13
votes
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 ...
405
votes
4answers
754k views

How do you mysqldump specific table(s)?

How can I dump a specific table or set of tables without including the rest of the db tables?
4
votes
3answers
3k views

Restoring an old backup to latest MySQL release

Our old database is MySQL 5.1 server and is four years old. If I uninstall MySQL 5.1 Server and install the latest release and restore the backup, will I gain performance benefits? I guess the new ...
37
votes
7answers
66k views

Is it possible to mysqldump a subset of a database required to reproduce a query?

Background I would like to provide the subset of my database required to reproduce a select query. My goal is to make my computational workflow reproducible (as in reproducible research). Question ...
103
votes
8answers
301k views

How do I move SQL Server database files?

I have a database and want to move the .mdf and .ldf files to another location. But I do not want to stop the MSSQLSERVER service, and I do not want to export to another server. How can I do this?
8
votes
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 ...
5
votes
1answer
3k views

How does max_allowed_packet affect the backup and restore of a database?

I have a database based on mysql 5.0.75-0Ubuntu10.2, running under Ubuntu 9.04. I have a table in that database with a medium blob column. I have been using automysqlbackup to do nightly backups/dumps ...
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 ...
79
votes
6answers
133k views

Safest way to perform mysqldump on a live system with active reads and writes?

I'm not sure if this is true but I remember reading if you run the following command in linux mysqldump -u username -p database_name > backup_db.sql while reads and writes are being made to a ...
23
votes
8answers
51k views

Any option for mysqldump to ignore databases for backup?

We have 40 databases in our server. We want to take 36 databases backup using mysqldump. How can i ignore remaining 4 databases in mysqldump command? Is there any option for mysqldump to ignore ...
4
votes
2answers
1k views

SQL Backup tuning large databases

I am tuning SQL backups using compression, writing to multiple files, and changing the BufferCount and MaxTransferSize options. I have SQL instance with a 4 TB database and several smaller databases ...
31
votes
1answer
39k views

Dump only the Stored Procedures in MySQL

I need to dump only the stored procedures : no data, no table creation. How can I do this using mysqldump?
26
votes
3answers
31k views

Is it possible to restore sql-server bak and shrink the log at the same time?

We have a bak file from a client that we have transferred to our developer offices for problem investigation. The backup is currently 25GB and the restored database is about the same size however it ...
37
votes
6answers
5k views

The smallest backup possible … with SQL Server

Daily we ship our SQL Server backups across the WAN. We need to minimize the size of these backups so it does not take forever. We don't mind if our backup process takes a bit longer; as it stands ...
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 ...
6
votes
4answers
4k views

Backup and restore “mysql” database

I use the following command to backup some normal databases: mysqldump --host=host --user=user --password=passwd --result-file=result.sql -R --single-transaction database_name My question is : do I ...
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 ...
8
votes
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 ...
3
votes
2answers
2k views

Quick MySQL Backup

I have a database which is grown to 3GB and it has 3 MyISAM tables. And I have 4GB RAM. What will be the best (quick) way to backup this database without any performance lack. Or mysqldump will work ...
31
votes
2answers
12k views

I/O requests taking longer than 15 seconds

Usually our weekly full backups finish in about 35 minutes, with daily diff backups finishing in ~5 minutes. Since tuesday the dailies have taken almost 4 hours to complete, way more than should be ...
12
votes
3answers
7k 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 ...
7
votes
4answers
17k 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
1answer
25k 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....
5
votes
2answers
7k views

Different MySQL Datafile Sizes After Restoration

I'm quite new in database administration. The database architecture of my current company is master-slave replication. We are using MySQL version 5.0.86. Some weeks ago, we upgraded the company's ...
5
votes
2answers
2k views

How to copy a MySQL database which is a mixture of InnoDB and MyISAM to the same server?

Because mysqldump takes forever, we decided to just move around the files. Because the 2 databases are on the same server, a cp will be fast. The problem is, from research, MyISAM is okay with being ...
19
votes
4answers
12k views

Is it possible to backup and restore part of a database in sql-server?

We have a sql-server 2005 database that we regularly transfer from our client site to ours. This takes a long time because we don't have a direct connection and have to transfer the file over their ...
3
votes
1answer
2k views

Backing up file groups with restore to earlier backup

I have a task: I have created a database with a filegroup lamb that has a few tables. I need to extract a csv into a table in a filegroup named lamb and back up that filegroup. Then extract another ...
2
votes
1answer
920 views

MySQL backup InnoDB

I have a VoIP server running 24x7. At low peak hour at lease 150+ users are connected. My server has MySQL running with InnoDB engine on Windows 2008 platform. I like to take at least 2 times full ...
68
votes
4answers
92k views

MySQL any way to import a huge (32 GB) sql dump faster?

I have this huge 32 GB SQL dump that I need to import into MySQL. I haven't had to import such a huge SQL dump before. I did the usual: mysql -uroot dbname < dbname.sql It is taking too long. ...
45
votes
1answer
65k views

How to get a working and complete PostgreSQL DB backup and test

I was hoping I could get a clear answer on how to ensure taking a full Postgres backup just like you would get with MS SQL Server, and then take care of orphaned users. From what I've read, and it ...
26
votes
1answer
16k views

Mongodb incremental backups

I was given the task to set up incremental backups for MongoDB replicaset, as start point, of course, I googled it and could not find anything on MongoDB docs, I did find however this question on ...
46
votes
6answers
65k views

.bak file not visible in any directory in SSMS

I have a .bak file created today by someone else, manually created through SSMS 2008 R2. I'm trying to manually restore the database, unfortunately the file isn't appearing when I go to browse it. I ...
15
votes
1answer
11k views

What's a good SQL Server backup schedule?

There seems to be a plethora of information regarding the process of setting up backup tasks, but not much information about the big-picture view of database backups. At least, it's hard to formulate ...
15
votes
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 ...
5
votes
2answers
577 views

The database mail configuration saved into a temp table

I am currently dealing with a bunch of servers and they have different Database Mail Configurations. I can see the Database Mail configuration for each of those servers. I use the following script: ...
5
votes
1answer
1k views

MySQL Server Backup

I was wondering if there was any way of making a backup of an entire MySQL Server at regular intervals to a specific location. (If the version is required I can get it easily). If there is, I must ...
6
votes
2answers
3k views

Copying datadir directory enough for backing up a database with InnoDB tables?

I have an innodb table with 80 million rows and it's extremely slow with mysqldump so I'm thinking of copying the datadir directory for a backup / transfer. I used to copy database with only MyISAM ...
3
votes
1answer
703 views

How to check the health of a SSAS database? And of its backups?

regarding backups of the SSAS databses, based on the following behaviour: Backup on an empty SSAS database hangs Is there a way to check whether or not the SSAS backup is healthy? I would accept ...
3
votes
1answer
4k views

Speeding up mysqldump / reload

Converting a large schema to file-per-table and I will be performing a mysqldump/reload with --all-databases. I have edited the my.cnf and changed "innod_flush_log_at_trx_commit=2" to speed up the ...
5
votes
2answers
3k views

Does a MyISAM table locks if I copy it while MySQL is running? (READ DISCLAIMER)

DISCLAIMER: I'm very aware this is not supposed to be done, but time consistency between tables aren't a concert here and Im trying whatever pops in my mind right now to have alternatives for punctual,...
3
votes
1answer
440 views

Restoring a differential backup in SQL server 2005

I have created a full back up of my database by executing the line below in my application: Dim Query As String = "backup database Ari to disk='G:\Documents and Settings\i\Desktop\BKAR\" & MyTime....
3
votes
1answer
4k views

Is SQL Server Backup single or multi-threaded?

If you perform a... BACKUP DATABASE [DB_Name] TO DISK=N'c:\backups\db_name.bak' WITH STATS=10 Will that perform a single or multi-threaded write? Our Server support company advised us that if we ...
2
votes
2answers
2k views

Backup and restore of TDE Databases to different server

There seems to be a lot of information on backing up and restoring TDE databases, but it's generally all the same information, and there seems to be some contradiction about certain points. I have ...
2
votes
2answers
951 views

MySQL export user with semi-colon “;” on the end

I am trying to set up automatic export of user accounts from one server to import into another. I am running the following command; $ mysql -u root -p -B -s -e "show grants for 'myuser'@'localhost';" ...
2
votes
1answer
56 views

How to find out the oldest full backup still existing on disk?

one of the things I like to find out is what is the oldest full backup file still living in my servers. it is the custom to delete or move those files to a different place after a number of days. How ...
2
votes
2answers
1k views

Will VSS backups break logchain?

Our "hardware" dept has started some ASR replication on one of the servers where we run SQL Server. It seems that the method they use for this uses VSS, and I can see a lot of messages in the SQL Log ...
2
votes
1answer
1k views

How to verify a SSAS Backup and how to perform Integrity Checks in SSAS?

I have a procedure to backup SSAS Databases that is working successfully. I also delete the SSAS backup files that are older than 2 days. What I am looking forward to implement is: 1) How to verify ...