In order to speedup the disk management, some values are added to each ext3 partition on the terminal. The reference site is located at CentOS HowTos - Disk Optimizations
LABEL=/ / ext3 defaults,noatime,data=writeback,commit=120 1 1 tmpfs /dev/shm tmpfs defaults 0 0 devpts /dev/pts devpts gid=5,mode=620 0 0 sysfs /sys sysfs defaults 0 0 proc /proc proc defaults 0 0 /customswap swap swap defaults 0 0
Don't write access time
The data order is not preserved when writes to disk. Just after set this value and before restart the terminal run the following command to avoid goes into read-only mode.
tune2fs -o +journal_data_writeback /dev/hda1
Set the time to sync data and metadata.
Solid State Disk
Usually the IDE SSD are slower that the SATA SSD, and some times could even be slower than the regular IDE. To speed them up a bit, we can apply the changes mentioned above, but also the scheduler can be changed in the following way:
# echo deadline > /sys/block/sda/queue/scheduler # echo 1 > /sys/block/sda/queue/iosched/fifo_batch
All the other options for the scheduler can be displayed with the command
# cat /sys/block/sda/queue/scheduler
deadline are the 2 that works well with SDD.
To make permanent this change, add the parameter
elevator=deadline at the end of the kernel line in /boot/menu/grub.conf
In /etc/sysctl.conf set the vualue
kernel.shmmax = 63554432
to increase Maximum shared segment.
Reduce boot time passing the known values to the kernel, the site that references. Optimizations can be found at Free Electrons - Embedded Linux Optimizations
# grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You do not have a /boot partition. This means that # all kernel and initrd paths are relative to /, eg. # root (hd0,0) # kernel /boot/vmlinuz-version ro root=/dev/hda1 # initrd /boot/initrd-version.img #boot=/dev/hda default=0 timeout=0 splashimage=(hd0,0)/boot/grub/splash.xpm.gz hiddenmenu password --md5 $1$/omJBwhD$phlKUXHDZI6BMLkNSfNgD/ title Bashlinux root (hd0,0) kernel /boot/vmlinuz-2.6.18-53.el5 ro root=LABEL=/ rhgb vga=792 lpj=998235 reboot=soft quiet initrd /boot/initrd-2.6.18-53.el5.img
Loops per jiffy can be obtained from /var/log/messages
When reboots, the firmware will be skipped.
Doesn't log all the boot messages to the stdout