Dell server architecture I/O High Performance SSD array twists and turns

The company's ERP system has a large amount of data, with 40 GB of data and 90 + concurrent users and 1000 + connections. The original IO performance cannot meet users' operation response requirements, and report query is slow, all the indexes have been done, and the index is re-built once a week, but the problem still cannot be solved. To this end, the company purchased the dell poweredge R720xd server, which supports two arrays and 24 hard disks, dual-CPU, 64 GB memory, more awesome. We have created two raid disks, two SAS hard disks for raid 1, and six SSD hard disks for raid 10. The system has been installed, however, after testing, I found that there is always a raid speed that is quite slow. It is the same as the desktop speed. My mother, how can this performance be achieved? The other is just the speed. I thought it would be better to replace it with two raid 1, and redo raid, install the system, and test. The result is the same. The result is very slow and the speed is average. I called dell 400 after-sales phone, tell us that there is no cach in the array card of this server, and the performance may be like this. My mom, isn't it an entry level without cach? Then I asked, will a cach become faster? Their reply will be faster, but I don't know how much it will be. I will ask you again if you haven't tested it? The answer is no, my mom. I was completely speechless when I encountered such after-sales support. Well, it seems that the vendor is not reliable. Let's test it by yourself and delete the two raid, make a raid10, reinstall windows server 2008r2, and install the testing software. The speed is up. With such IO performance, you can migrate the database to the new server! Testing speed!

If you switch to a 512 M or 1G cach array card, the performance should be faster. The current speed is only the read/write speed of a single SSD.