Artikelen gelabeld: flash disk

The Quick and Dirty Deduplication Analyzer


The best thing about being me… There are so many “me”s. — Agent Smith, The Matrix Reloaded One of our customers reported less than optimal space savings on XtremIO running Oracle. In order to test various scenarios with Oracle I was in search of a deduplication analysis method or tool – only [...]

The IOPS race is over


Infrastructure has always been a tough place to compete in. Unlike applications, databases or middleware, infrastructure components are fairly easy to replace with another make and model, and thus the vendors try to show off their product as better than the one from the competition. In case of storage subsystems, the [...]

Baking a cake: trading CPU for IO?


Sometimes I hear people claim that by using faster storage, you can save on database licenses. True or false? The idea is that many database servers are suffering from IO wait – which actually means that the processors are waiting for data to be transferred to or from storage – and [...]

Verlagen van de TCO: Goed beheer is het halve werk


De Total Cost of Ownership (TCO) is meer dan de aanschafprijs en een beetje onderhoud. Implementatie, integratie en beheerskosten zijn een substantieel onderdeel van de TCO. Deze personele lasten laten zich moeilijk vergelijken omdat we vooraf niet weten wat we kunnen verwachten. Deze kosten dan maar negeren is niet slim. [...]

Oracle ASM vs ZFS on XtremIO


Background In my previous post on ZFS I showed how ZFS causes fragmentation for Oracle database files. At the end I promised (sort of) to also come back on topic around how this affects database performance. In the meantime I have been busy with many other things, but ZFS issues still [...]