PCM

Does Persistent Memory Improve Performance? Ask Oracle!

A model-by-model timeline of Oracle's Exadata product introductions with key specifications.At last month’s SNIA Persistent Memory Summit Oracle presenter Jia Shi, Sr. Director of Exadata Development, shared some statistics on the Exadata system’s history over the past ten years.  (Click on the graphic to the left to see the timeline.)  The speaker highlighted the fact that the system’s I/O performance has grown from 0.05 million IOPS ten years ago to 16 million IOPS today, a 320X improvement!  Shi said that Exadata was designed to be “the ideal database hardware with smart system software and automated management.”  There’s every reason for her to be proud of her own work with this product!

The most recent iteration of the system, X8M, released last September, takes advantage of Persistent Memory (PM) in the  form of Intel’s new Optane DIMMs (formally called “The Intel Optane DC Persistent Memory module”).  The presenter said she was diligently working on this new approach at this time last year – so diligently, in fact, that she was unable to attend the 2019 Persistent Memory Summit even though she was working on a pioneering implementation of PM technology!

While the timeline in this post’s graphic doesn’t Continue reading

An ReRAM SSD Design

Chuo University EmblemA colleague pointed The SSD Guy to an ExtremeTech article about researchers at Japan’s Chuo University who have designed an SSD that uses a resistive RAM (ReRAM) as a buffer and is built using TSV technology.  The design was presented at the IEEE’s 2012 Symposium on VLSI Circuits this month in Hawaii.  A Nikkei article gives additional information.

The basic architecture reminds me of an FRAM + NAND SSD design that a Korean university presented at the Flash Memory Summit a few years ago.  Either approach gets past the problem of using a failure-prone battery, a temperature-sensitive supercap, or a big bulky bank of Continue reading