The goal of our project is to provide performance management for enterprise disc arrays taking into account QoS specifications.

 There are three different kinds of drivers : (order by speed and cost) › SSD - known as flash drives, new tech, very fast high cost › FC – fiber channel driver › SATA – “regular” driver cheapest  Our Problem - Which configuration of the disk array is best? According to: › Speed - performance › Price › Power consumption

 Past studies have concluded that SSD drives are not cost effective in the enterprise system › However, they used traces from a relatively small number of enterprise systems  We will use logical volume-level statistics, generated every few minutes over an extended period of time.

 Make the SSD drives ”look bad” › Increasing price  Make disk drives, FC and SATA drives ”look good” › Assuming better performance than they actually have. › Assume that I/O’s arrive at a very steady rate

 Performance constraints › Speed  Data of up to 2 GB should be parsed in less than 5 minutes  The algorithm engine and simulator should give an answer after 5 minutes.  All Queries should give an answer after 2 minutes. › Reliability  When using simulated data, 100% of the outcome should be as expected. › Portability  Our system should run on Windows and Linux operating systems.  Our system should only accept text in English in the desired format. › Usability :  Users are expected to be software engineers with knowledge in Symmetrix. Anyone with that knowledge will be able to use our system with the help of our user-friendly GUI; therefore no training will be necessary.

 SE Project constraints › We will develop our software on our personal computers with data generated from the real devices and provided to us by EMC. › We will create a second program that will help us test our system by creating special data with the desired characteristics of what is being tested.

 Our proof-of-concept prototype will include: › User input through three configuration files:  Data  User QoS parameters  Disk statistics › Console application that will allow the user to choose Queries and simulations of the system › Graphical presentation of the results