[2 days left] What’s wrong with your cloud strategy? Learn why multicloud solutions matter with Nimble Storage.Register Now

x
?
Solved

fifsystem inconsitencies and ufs logging

Posted on 2004-08-04
4
Medium Priority
?
339 Views
Last Modified: 2013-12-27
Hi

I know is that when ever there is abrupt shutdown of the system
there is filesystem inconsistencies.
Can you please ellaborate filesystem inconsistencies .

And also how does UFS logging help in minimissing
filesystem inconsistencies.

Regards


Sagar
0
Comment
Question by:sagar24
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 

Accepted Solution

by:
timf04 earned 152 total points
ID: 11726920
The incosistencies are with "files" within the filesystem not having the correct  information in the inode.  Each file and directory is considered a "file" in Unix, and they all have an inode that stores information regarding the "file", such as name owner, perms, size and pointers to the data.  If you have a busy filesystem then if you don't shutdown properly the filesystem will be corrupted more times than not.

The UFS filesystem can be setup to be a journaled filesystem that will track changes and upon reboot make sure all the outstanding changes are applied.  This action reduces the possibility of corruption in the filesystem.
0
 
LVL 10

Assisted Solution

by:Nukfror
Nukfror earned 148 total points
ID: 11732835
To add a little more specific information here, UFS logging protects the file system metadata - its does not protect file contents.  So the file system makes end up coming back very quickly but you could possibly still lose data in files.

There isn't anyway to enable file content protection in UFS logging - it would heavily increase disk IO.  VxFS does have this feature but its disabled by default.
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

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

When you do backups in the Solaris Operating System, the file system must be inactive. Otherwise, the output may be inconsistent. A file system is inactive when it's unmounted or it's write-locked by the operating system. Although the fssnap utility…
In tuning file systems on the Solaris Operating System, changing some parameters of a file system usually destroys the data on it. For instance, changing the cache segment block size in the volume of a T3 requires that you delete the existing volu…
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
In a previous video, we went over how to export a DynamoDB table into Amazon S3.  In this video, we show how to load the export from S3 into a DynamoDB table.
Suggested Courses

656 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