[mythtv-users] Changing filesystems?

[William Powers]

 >> Based on that, I ran an experiment to compare the deletion time of a
 >> single 10G file on an ext3 partition and on a JFS partition. The
 >> results were 10.2 seconds to delete the file on the ext3 partition
 >> and 0.9 seconds to delete the file on the JFS partition.

 > You didn't by any chance do the same test with ReiserFS did you?

I did not test anything except JFS and Ext3 the first time around,  but 
I have since tried to do a slightly more comprehensive test by 
attempting the single 10G file delete test for all five of the relevant 
file systems.  However, I had some issues and wasn't able to complete 
the full test as I had planned, this on an RHFC1 system with the Myth 
components installed via ATRpm's.

JFS:  Repeated the 10G file delete and got 0.9 seconds again

ReiserFS:  Got 6.2 seconds for the 10G file delete

Ext2:  Got 1.6 seconds for the 10G file delete

Ext3:  For some unknown reason, I was not able to (re)format the 
partition using 'mkfs.ext3 -T largefile4 -m 0 /dev/hdb4' as it was 
originally without encountering a floating point exception.  After 
formatting the partition using 'mkfs.ext3 -m 0 /dev/hdb4', I repeated 
the 10G file delete and got 2.3 seconds.  At this point, I have no idea 
why I was unable to use '-T largefile4', nor do I know whether the 
apparent difference in times between partitions formatted with and 
without 'largefile4' is significant.

XFS:  For some reason, attempting to write a 10G file to the XFS 
formatted partition locked up the PC (hard) at about the 4G point, each 
and every time.  So I am unable to perform the 10G delete test with XFS 
unless and until I find out what my 4G problem is.

So, that is where things stand at the moment...

Bill