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The Quick and Dirty Dedupe Analyzer – Part 1 – Hands on

Bart Sjerps 2017-05-17 Series 2 Comments

As announced in my last blogpost, qdda is a tool that analyzes potential storage savings by scanning data and giving a deduplication, compression and thin provisioning estimate. The results are an indication whether a modern All-Flash Array (AFA) like Dell…

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ZFS and Database fragmentation

Bart Sjerps 2013-02-26 Oracle, Performance 53 Comments

Yet another customer was asking me for advice on implementing the ZFS file system on EMC storage systems. Recently I did some hands-on testing with ZFS as Oracle database file store so that I could get an opinion on the…

 9,080 total views

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Managing REDO log performance

Bart Sjerps 2012-05-20 Oracle, Performance 14 Comments

I have written before about managing database performance issues, and the topic is hot and alive as ever. Even with today’s fast processors, huge memory sizes and enormous bandwidth to storage and networks. warning: Rated TG (Technical Guidance required) for…

 3,097 total views

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Oracle and Data Integrity: Data in, Garbage Out?

Bart Sjerps 2011-12-14 Oracle 2 Comments

A trivial question: What is the basic function of a storage system? I would say, the trivial function of a storage system is to store digital data and getting it back when you need it. To be specific: get the…

 1,598 total views

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Application processing at lightning performance – The hourglass view of access times

Bart Sjerps 2011-12-08 Performance 2 Comments

Even in these modern times, when lots of things are changing in the ICT world, some lessons from the past still hold true. Previously, I discussed the I/O stack in a typical database environment. As virtualization has complicated things a…

 914 total views

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