On Sat, 23 Oct 2010, JD wrote:
On 10/23/2010 02:49 PM, Patrick Dupre wrote:
On Sat, 23 Oct 2010, Patrick Dupre wrote:
Hello,
On a logical partition I am unable to set the block size to 1024 !
I formatted the partition mke2fs /dev/VG1/part1 -b 1024 -t ext4
and when I do a
blockbsz --getbsz or mke2fs -n
I get 4096 !
I also tried 2048 with the same result.
But dumpe2fs gives the right answer !
Is it related to the logical partition ?
Thank.
You have to be aware that selecting such a small
block size means that the FS will be allocating
at least 256 bytes of inode space per 1K data block.
So, the amount of space for on-disk metadata is about
25% of the space for data blocks. This is OK if you have
a lot of small files about 1 to 4k in size. Buf it most of
your files are much larger than 1kb, then you have
wasted a lot of disk space for inodes that may never
be used.
Is there a tool to optimize the block size ?
Determination of the average file size ?
Thank.
--
---
==========================================================================
Patrick DUPRÉ | |
Department of Chemistry | | Phone: (44)-(0)-1904-434384
The University of York | | Fax: (44)-(0)-1904-432516
Heslington | |
York YO10 5DD United Kingdom | | email: patrick.dupre@xxxxxxxxxx
==========================================================================
--
users mailing list
users@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe or change subscription options:
https://admin.fedoraproject.org/mailman/listinfo/users
Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
