Dump based backups (logical backups) and recommended for small-medium databases, however, you could speed up logical backup by using enhanced logical backup tools like mysqlpump or mydumper.
Raw backups are recommended for large databases and there are two major tools to explore: mysqlbackup (Enterprise backup) and Percona xtrabackup (free - only Linux ...
I had lots of confusion around the topic - In AG cluster restoring Log backup following with Copy - only full backup.
It is now working fine. We can use copy only backup from secondary replica:
RESTORE DATABASE [xxxxx_testDB] FROM
DISK = N'D:\Backups\FULL_COPY_ONLY\xxxxx_testDB_FULL_COPY_ONLY.bak'
WITH FILE = 1,
MOVE N'xxxxx_testDB' TO N'...
Well I was using a simple bash script to automate the backup process.
This script would run in a cronjob everyday at 3 am(you could set the time to your own liking). In this way, I could easily organize all the db backups in 1 server(location).
I am pretty sure log backups(I am assuming you are Talking about mysql logs) would also be a one line command in ...
You can't restore a file or filegroup without restoring the PRIMARY filegroup. There are a number of reasons for this given your scenario:
Under SIMPLE mode, a Partial Backup always contains the PRIMARY filegroup and all read/write filegroups. You would need to switch to FULL recovery to utilise file/filegroup only backups that can exclude the PRIMARY.
There is method called continuous Wal_Archiving, that can simulate The Diff backups in MSSQL
You run pg_basebackup instead of pg_dump, then ship the WAL_Logs to the backups server.
To recover from a failure, restore the last good backup and replay the WALs from the point in time from the last backup.
Depending on configuration can be better than DIFF ...
For the help of everybody I post the resolution I did found to my problem. Scanning other forums I noticed that this I/O error 112 - "not enough space on disk" is fairly a common issue, erratic but not so infrequent.
I read a post where the issue is described to come from the sql backup algorithm which, before starting the backup operation itself, is ...
Two ways verify consistency come to mind:
Perform checksums on each "end" of the copy (you've already tried this)
Restore the database after copying the backup files (if this is production data, you will need to be licensed appropriately as verifying those backups would probably be considered a production workload). There are myriad ways you can automate ...
SQL Server has a very handy command which checks the headers, checksums (if present) and that the backup set is complete. A data integrity check will be performed if a checksum is present but is optional. From the documentation here
RESTORE VERIFYONLY FROM DISK = 'D:\AdventureWorks.bak' WITH CHECKSUM;
Necesito hacerle una consulta, verifico o sabe aproximadamente cuanto pesaba esa tabla/base a respaldar? ya que debemos tener ese dato . Muchas veces cometemos el error de automatizar este procedimiento sin limpiar los espacios y como consecuencia .. el script comienza ( crea estructura), pero se cae a mitad de camino por no tener el espacio suficiente para ...
If you don't have the required permissions, pg_dump will give you an error message rather than an empty COPY statement. Moreover, permissions do not apply to superusers.
You should verify what the database user used by pg_dump sees when selecting from the original table.
The only explanations I can think of are:
Somebody deleted all rows from the table.
Is there a way to run a backup of a mysql database using sql?
Short answer: No.
... scripts ... only have mysql user credentials, not system login credentials.
I'm pretty sure it's possible to run the mysqldump utility against a remote database.
However, I would have to ask "Why?"
Even if you could take a backup, what would you hope to do with it?...
That is silly You should instead take one pg_basebackup per day and archive the transaction log with archive_command. That way. you can use point-in-time-recovery to restore the database to any given point in time.
See the documentation for more.
The 8th row in your first screenshot shows what appears to be an active VLF in the file. If there is a single active log record in a VLF then the overall VLF will be treated as active log and that VLF cannot be truncated.
If the server is SQL 2016 SP2 or later, you can use the below DMF to get information on the VLFs and check the active state and size. You ...
Does the backup process buffers data in cache ? If yes, could this
cause a variation of PLE trend or memory pressure ?
The backup process does not read data into the buffer pool, it uses separate threads that use buffers to read and write the data pages.
More on that here.
It does create a checkpoint prior to starting the backup. This checkpoint ...
Executing nbackup -L when a database is already locked will produce an error (and the executable will return exit code 1 instead of 0):
PROBLEM ON "begin backup".
unsuccessful metadata update
-ALTER DATABASE failed
-Database is already in the physical backup mode
In that case, Firebird (or nbackup) won't change anything in the state of the ...
By default SQL will not encrypt backups. From what I see in your screenshot, the backup you're taking there, will not be encrypted either. (The option is just disabled)
A simple way would be to just use T-SQL to create your backup. ( Note copy_only unless you want to be starting a new backup chain) (and replace the folder with your backup dir)
That's correct, each differential which is taken brings your recovery point to the timestamp of the differential. If you overwrite the differential backup each time it is run you will not be able to recover a database the time between the FULL and the differentials which were overwritten, only either from the FULL only or the available differential. If ...
Each differential backup is composed of the pages that have changed since the last full backup. So if you take a full backup on Sunday, then diffs on Monday, Tuesday, etc. then restoring the database will only require Sunday's full backup, followed by the most recent day's differential.
However, by overwriting your diffs each day, you are losing the ability ...
If you overwrite the diff backup everytime and there is an issue with your latest diff backup, your only remaining option would be to restore the full backup (with potentially +6 days of data loss).
What is your RPO for those databases (how many data are you allowed to lose) ?
If the data is not important and you are allowed to lose some part of it, then ...
several hours seems a bit long for only 50gigs as other have stated. This tells us the IO on the server, or destination is bogged down or needs to be up-sized. Or this is network issue causing the slowness.
I suggest do a pg_dump and monitor the server resources, hard-drive, and Network and the destination to see where slowness is
Another option that ...
It depends a lot on details that you have not specified, particularly how the IO subsystem is arranged for this database instance. Single drive? Multiple? If multiple how is the data/uses spread over those drives? Drive types (spinning, SATA SSD, NVMe SSD, ..._)? Network rather than local and if net, what networking standards?
With 50Gb taking "several ...
You can get some info by inspecting a backup file using the RESTORE HEADERONLY command. The linked documentation explains what all of the result set fields are and mean, but the ones you are looking for should be:
8 = SQL Server 2000
9 = SQL Server 2005
10 = SQL Server 2008 or 2008 R2 (see [SoftwareVersionMinor] for distinction)
11 = ...
This was originally left in a comment by Dan Guzman:
The differential backup includes all extents modified since the last full backup. If you reorganize or rebuild after the full backup, the diff backup will include all those modified extents. Note when you reorg with LOB_COMPACTION ON, the differential backup size will increase significantly if LOB ...