Flashcahe On SSD

Git Clone Flashcache:

git clone https://github.com/facebook/flashcache.git

Install and Configure Flashcache (Note: Please remember to change the versions to match your uname -r output!)

cd flashcache/
make KERNEL_TREE=/usr/src/kernels/2.6.32-042stab075.10
make install KERNEL_TREE=/usr/src/kernels/2.6.32-042stab075.10
modprobe flashcache
Make sure its running: dmesg | tail

Making /vz flashcached:
umount /vz
Find your UUID for /vz: grep "/vz" /etc/fstab
flashcache_create -p back vz_cached /dev/sdb /dev/disk/by-uuid/replace-with-your-uuid
Comment out vz in fstab: nano /etc/fstab

Configuring Flashcache

Copy the config file: cp /tmp/flashcache/utils/flashcache /etc/init.d
Change the permissions: chmod 755 /etc/init.d/flashcache
nano /etc/init.d/flashcache

Change the following information:

SSD_DISK=/dev/sdb
BACKEND_DISK=/dev/disk/by-uuid/replace-with-your-uuid
CACHEDEV_NAME=vz_cached
MOUNTPOINT=/vz
FLASHCACHE_NAME=vz_cached
CTRL +X and save it.

Turn on Flashcache at boot: chkconfig flashcache on
Reboot the Server: reboot -n

Make sure everything looks good and run df-h.

Do a DD test to make sure flashcache is working.

First do a DD test in the root directory:
cd /
dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync; unlink test

Note the output

Now do a DD test in the /vz directory.
cd /vz
dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync; unlink test

Note awesomeness.

Everything is now setup as far as the base system with SolusVM OpenVZ and Flashcache!
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