Consistency in Scalable Systems

Abstract

A bstract W hi l e event ual consi st ency i s t he general consi stency guarant ee ensured i n cl oud envi ronm ent s, stronger guarant ees are i n f actachi evabl e. W e show how scal abl e and hi ghl y avai l abl e syst em s can provi de processor,causal ,sequent i aland sessi on consi stency duri ng norm alfunct i oni ng. Fai l ures and net work part i t i onsnegat i vel y af fectconsi stency and generat e di vergence. A ft ert he fai l ure ort he part it i on,reconci l i at i on t echni quesal l ow t he system t o rest oreconsi stency.