Magento Site Performance Optimization

Chapter 4
#! /bin/sh
# /etc/init.d/syncache.sh
#
echo "Synching Magento Cache to Hard drive"
echo [`date +"%Y-%m-%d %H:%M"`] Magento Cache Synched to Disk >> /
var/log/magento_ram_cache.log
rsync -av --delete --recursive --force /var/www/YOUR_DOMAIN.
COM/var/cache/ /var/www/YOUR_DOMAIN.
COM/var/cache-backup/
exit 0
The previous script will, indeed, if launched, synchronize the file between the
RAM mounted folder and the backup folder. It will echo Synching Magento
Cache to Hard drive every time it's launched. Also, this script will write
the following line in a file named /var/log/magento_ram_cache.log:
Year month day Hours minutes Magento Cache Synched to Disk
4. However, it's not yet automatized. In order to do it, you have to add an entry
in the cron job table to our system. In Linux systems, the cron table is used to
schedule commands that will be executed periodically and is used as follows:
* * * * * user command to be executed
The asterisks stand for minutes (0 to 59), hours (0 to 23), days of the month (1
to 31), days of the week (0 to 7, both 0 and 7 are for Sunday).
5. To edit the cron table, use the following command:
$ crontab –e
Add the following line to run the script every 10 minutes:
* /10 * * * * root /etc/init.d/syncache
From now on, the cache files belonging to the cache mechanisms built into Magento
will be stored in an automatically mounted in-RAM directory. Moreover, the content
of this directory will be synchronized with the hard drive every 10 minutes in order
to avoid important data losses.
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