Open-source DRBD helps MySQL improve cluster capabilities (figure)

Note that HA between the master and slave servers is implemented through DRBD (DistributedReplicatedBlockDevice. DRBD is known as quot; Network raid quot;, open-source

Note that HA between the master and slave servers is implemented through DRBD (Distributed Replicated Block Device. DRBD is known as quot; Network raid quot;, open-source

A few days ago, the MySQL site held a 12-day Scale-Out activity, listing many successful cases. The figure below each page is very noticeable:

Note that HA between the master and slave servers is implemented through DRBD (Distributed Replicated Block Device. DRBD is known as "Network RAID" and is an open-source software developed by LINBIT. MySQL and LINBIT have reached a cooperative relationship, this "12-day Scale-Out" campaign is also driven by commercial cooperation. DRBD helps MySQL and claims to be able to obtain reliability of 4 to 9, which is no less than any commercial database software.

The emergence of DRBD has indeed greatly improved the availability of MySQL clusters. Moreover, it has unique characteristics and is very suitable for Internet-oriented applications. Because it is data block synchronization at the storage layer, it is easy to achieve I/O load balancing at the application layer (the slave machine bears certain read pressure), not only does it support database failures, it also takes less than 30 seconds to take over IP addresses. This is an excellent cluster solution for the poor (compared with some solutions in Oracle, such as the solution adopted by eBay, the cost-effectiveness is good ). There are already many successful implementation cases in foreign countries. The domestic Web 2.0 website does not know if it is already in use. We recommend it here. What's more interesting is that someone has implemented an alternative Oracle cluster through DRBD.

No wonder there have been some radical comments from open-source fans who claim that RAID is about to become a thing of the past.