When is fast not so fast? One of my pet sites, storagesearch, has a new article on SSD performance, with some historical background. Check it out.
Here is the money quote:
If repeat writes to the same small address range (same flash blocks) is interspersed with read operations (the play it again Sam scenario - which occurs in database tables) the performance outcome varies significantly between fat and skinny flash SSDs. A fat flash SSD may produce results which more closely follow the behavior seen in HDDs and RAM SSDs - as predicted by the write IOPS spec. But performance in most skinny flash SSD designs will collapse.
The meaning of skinny and fat is explained here. So, for the purposes of what this endeavor advocates, the fat should be on the fire.
IFF AI, as currently implemented, can intuit Special Relativity from just a clock tower and a moving tram will I take AI seriously.
Infinite granularity yields infinite complexity.
Leading an Insurrection is now an Official Act
The world is not linear.
-- Dr. McElhone/1974
Well, I'm going to do it, whether the women like it or not. I'm going to protect them.
-- The Orange Shitgibbon©anon./2024 [y'all get burkhas]
Scientists aren't vocal enough about science. There are large groups of people who think scientists are all frauds and who don't
believe in science, and they're being cultured by some of our far right-wing politicians, religious leaders and community leaders. -- Dr. McElhone/1974
Well, I'm going to do it, whether the women like it or not. I'm going to protect them.
-- The Orange Shitgibbon©anon./2024 [y'all get burkhas]
-- Drew Weissman/2022
To date, Microsoft is stating that organizations testing In-Memory OLTP have
seen transaction speeds improve by up to 30 times compared to past
performance, with the best performance gains achieved when the business
logic resides in the database and not in the applications.
-- Jonathan Watts/2015 [my emphasis]
-- Jonathan Watts/2015 [my emphasis]
I have had to explain and re-explain and re-explain and re-explain, you know, how relational databases work, what is an eigenvector,
what is dimensionality reduction.
-- Christopher Wylie/2018
... but Flash-based storage has such a different performance profile from rotating media, that I suspect that it will end up having
a large impact on filesystem design. Right now, most filesystems tend to be designed with the latencies of rotating media in mind.
-- Linus Torvalds/2007
-- Chris Date/2009
Election day's thought
Democracy is the theory that the common people know what they want, and deserve to get it good and hard. -- H. L. Menken/1915 [
See you next week in a brand new show©Heckle and Jeckle
In a time of SSD, multi-core/processor, two terabyte memory and Optane App Direct Mode machines, there is no reason not to
build from BCNF data. Time to do what Dr. Codd demonstrated. Technology has finally caught up with the maths.
About
- Robert Young
- Been doing databases, both relational and others, as well as operations research since Hector was a Pup.
Shameless Plug
I know a little something about SQL, DB2 (preferably LUW, z/OS if the money's right), Oracle, SQL Server, Postgres, and database design in general. Mentoring/teaching/consulting on a short term basis, too. And a bit of stat analysis if it's R.
gnuoytr at rcn dot com.
gnuoytr at rcn dot com.
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