xfs home directory went south

Karl Larsen k5di at zianet.com
Fri Jul 11 14:18:31 UTC 2008


Oliver Grawert wrote:
> hi,
> Am Freitag, den 11.07.2008, 06:26 -0600 schrieb Karl Larsen:
>   
>> Oliver Grawert wrote:
>>     
>>> http://oss.sgi.com/projects/xfs/faq.html
>>> might probably have helping hints ... iirc xfs requires you to have teh
>>> disk actually mounted for any repair or resize options ...
>>>
>>> this is really a high level enterprise filesystem, that indeed requires
>>> some background knowledge ...
>>>   
>>>       
>>     I Googled xfs and there is a whole development world out there for 
>> xfs. Even a bugzilla :-)
>>
>> They are working on tools for xfs and there are many out there.
>>
>> The reason to use xfs is that it is slightly faster than ext3 and 
>> doesn't have the long file system check of ext3. I am totally happy with 
>> ext3. I am old and not in a hurry.
>>     
>
> well, xfs was developed by SGI for supercomputer systems like the cray
> (if you are as old as you state you might pobably remember :) ) 
>
> the acual reasn to use something like xfs is that it is capable of
> easily handling files of several terabyte size, that it has enterprise
> functionallity like resizing the disk while being used (i.e. you add a
> hotswap device to your SAN during the day while its being used and then
> can resize the FS on the fly as well while being used by the whole
> company), that you can tweak its low level parameters without unmounting
> etc ...
> ... enterprise features as i stated above :)
>
> xfs is usually used with very huge raid arrays so indeed a filesystem
> check would pull the company using it out of business for a day... 
> i.e. if you have a petabyte array that runs an fsck on boot (such a
> check can easily take a day at this size depending on teh diskspeed)
>
> the speed difference between ext3 and xfs even if it exists is rarely
> the main reason for companies to use xfs :) (it might be for home users
> but i doubt you really notice the difference in day to day use on a
> speedy desktop or laptop nowadays)
>
> ciao
> 	oli
>   
    Thanks for the information. I was aware of the cray, but know very 
little about it. I was a user of the cray at CIA while I worked there a 
few years. I am 73 years old by the way. My work started before we had 
computers and hand calculators.

Karl
 

-- 

	Karl F. Larsen, AKA K5DI
	Linux User
	#450462   http://counter.li.org.
   PGP 4208 4D6E 595F 22B9 FF1C  ECB6 4A3C 2C54 FE23 53A7





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