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outlineNotes on optimizing

performance using Solid State Drives and especially preventing early failures of these unique storage devices.



I spent a months researching Solid State Drives before replacing a Hard Disk Drive in July 2012. I learned two things: First, SSDs have unique characteristics that if taken into account, can improve speed and longevity. Second, most people are not aware of the considerations or don't bother with them. This information was compiled from months of research and testing, and is not unique to FreeSWITCH™. However, FreeSWITCH™ can benefit from the much faster startup times. This is a minor update to that information. FreeSWITCH™ users be sure to read FreeSWITCH's core.db I/O bottleneck below.

by Mario G


This introduces SSD performance considerations and illustrates how to implement a "tuned" SSD on Linux. This article is not meant to explain the details of SSD operation. There are many well written articles providing very detailed information, some referenced below. The objective here is to pull the information together to quickly obtain SSD performance and longevity. If you are converting from an HDD to an SSD and want it performing at it's best make sure you prepare a plan first! These considerations are identical for other operating systems but different commands and utilities are required.

The Problem

SSD performance is largely ignored because it's so easy to do so! When most people replace an HDD with an SSD they simply partition the SSD and copy data to it. If tuning steps are not performed the SSD will still function like an HDD, however, it is not a good idea. Unless SSD tuning considerations and preparation steps are taken: