A Novel Approach to Improve Availability of Massive Database Systems (MDS)

摘要

Because of the huge scale and numerouscomponents, a massive database system’s availability hasbecome a serious challenge. Many database replicationtechnologies are used to increase the MTTF, but few areprovided to decrease MTTR in massive database systemswhere the traditional backup methods are not feasible forexpensive human cost. Based on analyzing thecharacteristics of the data in massive databases, we proposea novel approach called Detaching Read-Only (DRO)mechanism and its variation DRO+. It decreases MTTRthrough reducing the size of physically changing data inevery database by detaching data on node granularity. Theanalysis and experiment results show that our approach cannot only reduce MTTR by an order of magnitude, but alsoreduce the expensive human cost without extra hardwarecost.