Recently we have migrated to shiny CentOS 7 saying good bye to CentOS 6. Although the migration of WordPress was quite easy from CentOS 6 to CentOS 7. This time, we made plan to try another technology stacks. Leaving some good memories with my old server, invested lots of time to tune the server with economical price and should happily say somehow I did it.
Tuning and optimization of server will always be on run. We would like to share some technical differences currently we are running on new Server.
| Technology | Before Dec-2014 | On/After Dec-2014 |
|---|---|---|
| Operating System | CentOS 6.5 | CentOS 7 |
| OS Architecture | x86_64 | x86_64 |
| CMS | WordPress 3.x | WordPress 4.x |
| Web Server | Apache (Worker) + php-fpm | Nginx + php-fpm |
| Database | MySQL 5.6 | MariaDB 10.x |
| Web Cacheing | Varnish 3.x | Varnish 4.0 + Nginx FastCGI |
| PHP code Cacheing | APC | Opcache (Because APC is deprecated for < PHP 5.5 version) |
| Memory Object Cacheing | Memcached | Memcached |
| DNS | DNS (No round Robin) | DNS (with Round Robin) |
| CDN | Cloudflare | Cloudflare |
The migration was quite successful but only with DNS resolution bumpy rides we received. But yes, we got the solution of it also. There will be no downtime when next time, we will do migration.
First of all we would like to thanks for DigitalOcean for providing the awesome and cheap cloud servers. When we removed the old instances, we have seen the option to restore the old server before 48 hours. This feature from DigitalOcean is awesome.
Sincerely apologize to our readers who have seen some up and down of blog. Your love,support and trust build our confidence . This year, we have many new plans to implement on our blog. Guest writing is under consideration. And some more things. Yes, donation to charity,opens source world,needful will always be our first recommendation.
Yours Sincerely ,
Sharad Chhetri