2 question about XFS fragmentation and _fsr: SPLITTED Q1:sparese files

[Janos Haar]

Note: I have splitted my previous letter for easyer discusion...
This have only Question-1 the storage with only sparse files.

----- Original Message ----- 
From: "Stan Hoeppner" <stan at hardwarefreak.com>
To: "Janos Haar" <janos.haar at netcenter.hu>
Cc: <linux-xfs at oss.sgi.com>
Sent: Monday, April 11, 2011 10:37 PM
Subject: Re: 2 question about XFS fragmentation and _fsr


> Janos Haar put forth on 4/11/2011 12:39 PM:
>
>> In the result, actually we have >6TB images on the 3TB disk, wich is
>> 97.9% fragmented.
>
> How much free space does the filesystem have?  How big is each image
> file?  For xfs_fsr to work properly it must have sufficient free space
> in the filesystem.

Actually less than 1%.
I know, this is too less for xfs_fsr, but i am only thinking actually to try 
because i am unsure this is useful for me.

>
>> Basically the sparse RAW disk images should be more faster accessible
>> than the original drive, because this is 4disk raid, instead of one, AND
>> the head don't need to travel through the empty space of the drive...
>
> It sounds like you may have some other issues besides filesystem
> fragmentation.
>
>> The XFS_FSR can be good for me or not?
>
> If you have plenty of free space.
>
> -- 
> Stan

Thanks,
Janos