EXT4 virtual disk optimization

Hi all,

These are my tweaks in order to squeeze the performance of a EXT4 virtual disk (in example /dev/sdb1).

ALERT
No implicit nor explicit warranty of any kind is stated here. These commands and/or settings may cause data loss. Use them wisely at your own risk!

tune2fs -o journal_data_writeback /dev/sdb1
tune2fs -O ^has_journal /dev/sdb1
sudo e2fsck -f /dev/sdb1
#
tune2fs -o ^user_xattr /dev/sdb1
tune2fs -o ^acl /dev/sdb1
tune2fs -o nobarrier /dev/sdb1
tune2fs -o discard /dev/sdb1
#
tune2fs -O ^dir_index /dev/sdb1
tune2fs -O ^dir_nlink /dev/sdb1
tune2fs -O ^huge_file /dev/sdb1
tune2fs -O ^metadata_csum /dev/sdb1
tune2fs -O ^quota /dev/sdb1
tune2fs -r 0 /dev/sdb1
#

dumpe2fs /dev/sdb1 | less

References and Kudos:

1. https://developer.ridgerun.com/wiki/index.php/High_performance_SD_card_tuning_using_the_EXT4_file_system