Like its predecessor, the H20 combines Optane with QLC NAND on a single M.2 2280 drive to deliver higher performance without the higher cost. No comments yet.Announced back in December 2020, the Intel Optane Memory H20 is the latest release of the company’s unique hybrid technology designed for notebooks and mobile devices. You can leave a response, or trackback from your own site. You can follow any responses to this entry through RSS 2.0.

This entry was posted on November 28, 2010, 09:04 and is filed under Databases, Storage.

Since none of Crystal Disk Mark’s test modes provide any I/O request depth, it won’t provide an accurate measure of performance for the disk arrays and storage subsystems that are typically used with SQL Server installations and it isn’t an appropriate tool for capacity planning or evaluating hardware for such installations. This lets the controller and the drive have a shot at elevator seeking across multiple requests, combining redundant requests in cache, and batching as best as possible. I like to have at least a couple outstanding I/O operations per logical spindle on the servers I run. It seems a bit irresponsible to recommend such a tool for servers, though–particularly machines which will be running SQL Server, where multiple outstanding I/O operations are key to achieving any sensible level of performance.

It doesn’t take long to download the source code and confirm this fact.įor desktop machines, doing only one I/O at a time isn’t so bad because that matches the workload desktop machines typically show their drives during normal use. Instead, it issues a single blocking requests. That is, it doesn’t do multi-threaded or overlapped I/O requests. If you run the test, you’ll notice that the disk queue for the drive its testing is never deeper than one. Problem is, one of the tools is pretty badly flawed.īerry recommended Crystal Disk Mark, which is a cute tool that ostensibly measures disk performance. recommended some benchmarking tools for SQL Server users via Glenn Berry’s SQL Server Performance Blog.

Queues vs threads crystal disk mark