[Gluster-devel] Wiki pages possible error about tune2fs optimizations

[Angel]

Hi,

Ive ben searching on de list archives related to the following:

On wiki http://www.gluster.org/docs/index.php/Guide_to_Optimizing_GlusterFS#Tuning_Kernel_Parameters


You can read...

" Ext3 also has directory indexing which is very much useful for the directories which have larger files or many files by boosting the file access. 
This is done by generating hashed binary trees to store directory information. But by default if a directory grows beyond a single disk block its 
automatically indexed using a hash tree. 

To enable directory indexing use the following commands 

$ tune2fs -0 /dev/hda1 
"

But the man page for tune2fs says:

"
-O [^]feature[,...]
              Set or clear the indicated filesystem features (options) in the filesystem.  More than  one  filesystem  feature  can  be
              cleared  or  set  by  separating features with commas.  Filesystem features prefixed with a caret character ('^') will be
              cleared in the filesystem's superblock; filesystem features without a prefix character or prefixed with a plus  character
              ('+') will be added to the filesystem.

              The following filesystem features can be set or cleared using tune2fs:

                   dir_index
                          Use hashed b-trees to speed up lookups in large directories.
"

this would lead to ..

$ tune2fs -O dir_index /dev/hda1



My distribution is OpenSuse 10.3

¿is this an error on he wiki or there are more ways to activate dir_index flag in other distributions.?


Regards, Angel
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