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fragmentation

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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Oracle ASM vs ZFS on VNX

Bart Sjerps 2014-10-13 Oracle, Performance No Comments

In my last post on ZFS I shared results of a lab test where ZFS was configured on Solaris x86 and using XtremIO storage. A strange combination maybe but this is what a specific customer asked for. Another customer requested…

 1,598 total views

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Oracle ASM vs ZFS on XtremIO

Bart Sjerps 2014-08-11 Oracle, Performance 12 Comments

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…

 2,701 total views

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Fun with Linux UDEV and ASM: Using UDEV to create ASM disk volumes

Bart Sjerps 2014-07-01 Oracle, Virtualization 34 Comments

Because of the many discussions and confusion around the topic of partitioning, disk alignment and it’s brother issue, ASM disk management, hereby an explanation on how to use UDEV, and as an extra, I present a tool that manages some…

 10,546 total views

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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…

 9,078 total views

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