Saturday, December 14, 2013

What is the difference between cpio and of ufsdump

www.unixbabuforum.inWhat is the difference between cpio and of ufsdump in Solaris

www.unixbabuforum.inYou should consider the following when you are choosing your backup software: 

* Do you have a large environment or small environment 
* How much data do you need to back up 
* Do you have one tape drive or a jukebox/library 
* Do you typically need to restore entire filesystems or only one file 
* When you need to restore a file and how quickly do you want to do 
the restoration 
* How much money can you spend on your backup system 
Making a Decision About Purchasing an Indexed Database 


The following scenario demonstrates the reason you might encounter for 
considering the need to purchase an indexed database (available from 
Enterprise Backup Software or Veritas NetBackup): 
You have 20 filesystems that you back up daily. Over the course of a week, 
you generate 140 backups (20 filesystems * 7 days). These backups could 
be stored on 1 - # tapes. Therefore, if you want, for example, to do 
a restoration on a file that is named /fruit/citrus/lemon/, you need to determine which tape you put in the drive, which dump contains, and so on. 
Without an indexed database, making these determinations could be difficult. 
The following questions will help you decide whether you need an 
indexed database or you don't: 

* Do you do restores of entire filesystems or single files 
If you restore entire filesystems, tar or ufsdump might be acceptable. 

If you need to restore single files, you might consider a more 
sophisticated backup product. 

* Do you have more than one tape drive 
The purchased backup products make it easier to use multiple tape drives. 
* Do you have a stacker or a library 
The only non-purchased program that can work with two tapes is 
ufsdump, but ufsdump 

only works with a stacker and the "-l" option. 
* Do you have many clients or just the one server 

In backup technology, a "server" is a machine with a tape drive or jukebox 

connected to it, and a "client" is a machine that is connection through the 

network to the server. 

Regarding disaster recovery: 
If your server crashes, it is a little more work to restore it with 
the purchased backup products than it is with the simpler, free 
products because you must first install the operating system, then 
install the backup product, then recover your database, and then start 
the restorations. With tar, ufsdump, and dd, you can simply boot from 
the CD-ROM and start the restorations. Before you make your decision, 
you should consider how often you need to restore your server. 
Comparing Databases 


ufsdump tar/cpio or dd EBS NBU 
Indexed Database No No Yes Yes 
Cost Free Free $ $$ 
Configurable No No Yes Highly 
Ease to install easy easy ok involved 
Disaster Recovery easy easy involved involved 
Multiple Clients can be done can be done designed designed 
(designed = designed for this) 
Interleaving No No Yes Yes 
Built in way to 
manage tapes No No Yes Yes

www.unixbabuforum.inCPIO is the file Backup... 
UFSDUMP is the Filesystem Backup... 


-->This command is used to take the backup files from one place to 

-->It has a filter program by talking the i/p information from standard i/p 
and delivering the o/p to the standard o/p file... 

-->you can manipulate i/p and o/p using redirection symbols and pipelines... 

-->using CPIO we can backup individual files... 

-->The backup made by CPIO occupies less space than those created with 

-->CPIO can span on multiple tspes,but "tar" doesn't... 

-->In CPIO,No absolute backup Only relative backup... 




--->ufsdump is for filesystem backup. 

-->Whenever we are having the backup with ufsdump every time it records 
ufsdup files and update to the /etc/dumpdates,which contains 3 fields 
1.filesystem 2. backuplevel and time 

www.unixbabuforum.inUfsdump is used to take the file system backup while cpio is used to take directories or files backup cpio is used to take multi_volume backups both can be used to take increemental or full backups


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