Solved

sql native backup, does it offer any compression?

Posted on 2007-11-23
13
443 Views
Last Modified: 2008-02-01
Hi,
If I'm doing sql server native backup, as compare to using 3rd party agent such ( legato / litespeed ) will I have an advantages in term of backup size?  will the size of db backup file  equivalent with database size?
0
Comment
Question by:motioneye
  • 4
  • 3
  • 2
  • +4
13 Comments
 
LVL 25

Expert Comment

by:imitchie
ID: 20337760
none at all
0
 
LVL 25

Accepted Solution

by:
imitchie earned 500 total points
ID: 20337764
below is not 100% accurate, but serves to understand what is going on
if you do a native SQL Server backup, what you get is a FULL copy of data, equal to the used space in the database. for example, if you run sp_spaceused and get

database_name, database_size, unallocated space  
test, 2.68 GB, 0.91 GB

the size of your backup is database_size - unallocated. it makes a copy of all data, less the unallocated space.
usually, zipping the backup will compress it to 15-20% it's size.  3rd party agents usually include compression, but when put against native+zip, the results are quite similar (backup size)
0
 
LVL 25

Expert Comment

by:imitchie
ID: 20337765
i meant to also say that the backup file contains everything from both DATA + LOG files
0
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

 
LVL 31

Expert Comment

by:James Murrell
ID: 20337769
0
 
LVL 75

Expert Comment

by:Aneesh Retnakaran
ID: 20337777
Litespeed offers more compressed & faster backups
http://www.sqlservercentral.com/articles/Product+Reviews/litespeedforsqlserver/1862/

>Will the size of

Not really, backups will be smaller compared to the actual size
0
 

Author Comment

by:motioneye
ID: 20337844
so we were saying that native sql backup will only copy those data + log with excluded any unallocated space in data files and log file???
0
 
LVL 25

Expert Comment

by:imitchie
ID: 20337860
motioneye, that's right. winzip is not the best compressor. 7zip and winrar and some others can do better if you really need to cut down on size
0
 

Author Comment

by:motioneye
ID: 20337869
ok is there any option that I can use to backup the database and run any vbs or wsh scripts to compress the files?? will dts work on this??
0
 
LVL 10

Expert Comment

by:AustinSeven
ID: 20337883
If you look in Books online, you will see a good description of the BACKUP command and, actually, this will tell you what it does.    Basically, you can do a FULL, DIFFERENTIAL or TRANSACTION LOG backup via the BACKUP command.   It really is better if you check out in books online what these backups do and how they relate to each other, expecially in terms of when the backups are restored, using the RESTORE command of course.

I think your question needs turning around a bit.   For example, why would anyone not use SQL BACKUP?   Personally, I much prefer using SQL's builtin BACKUP and RESTORE compared to any 3rd party backup.  It works well, does what it's designed to do and has never let me down.  I don't have to worry about 3rd party licencing either... I remember enquiring about LiteSpeed and they charge for client licences.    In our case, that would mean purchasing client LiteSpeed licences for a lot of desktops and laptops.   SQL Client is free.  

The main  reasons to consider a 3rd party backup solution for SQL Server might be speed, encryption, compression.    For example, if you had huge database that simply took too long to backup even out-of-hours, you would probably want to look at something like LiteSpeed.   Similarly, if the business had highly senstive data that they wanted to protect, they would have to consider encryption for the  backups as well as everything else.    Unfortunately, the biggest weekness of SQL BACKUP is its lack of builtin encryption.   However, there's nothing stopping a DBA from implementing a 3rd party encryption tool to encrypt the backup files.  Finally, with regard to compression, SQL BACKUP doesn't do any (as per imitchie's comment).    Despite these drawbacks, I love SQL BACKUP.

AustinSeven

0
 

Author Comment

by:motioneye
ID: 20337896
hmmm... basically I'm not looking for any 3rd party product, just want to know how do I integrate vb scripting to compress the *.bak after we had done with backup.. I guess to incorporate this it may require a dts knowledge and as well vbs scripting
0
 
LVL 22

Expert Comment

by:dportas
ID: 20338813
SQL Server 2008 includes built-in compression as an option when you do a backup.
0
 
LVL 31

Expert Comment

by:James Murrell
ID: 20338836
0
 
LVL 23

Expert Comment

by:Racim BOUDJAKDJI
ID: 20340688
0

Featured Post

The Eight Noble Truths of Backup and Recovery

How can IT departments tackle the challenges of a Big Data world? This white paper provides a roadmap to success and helps companies ensure that all their data is safe and secure, no matter if it resides on-premise with physical or virtual machines or in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When you hear the word proxy, you may become apprehensive. This article will help you to understand Proxy and when it is useful. Let's talk Proxy for SQL Server. (Not in terms of Internet access.) Typically, you'll run into this type of problem w…
Having an SQL database can be a big investment for a small company. Hardware, setup and of course, the price of software all add up to a big bill that some companies may not be able to absorb.  Luckily, there is a free version SQL Express, but does …
Familiarize people with the process of utilizing SQL Server functions from within Microsoft Access. Microsoft Access is a very powerful client/server development tool. One of the SQL Server objects that you can interact with from within Microsoft Ac…
Via a live example, show how to shrink a transaction log file down to a reasonable size.

803 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question