[HN Gopher] Real World Database Latency
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       Real World Database Latency
        
       Author : evanweaver
       Score  : 28 points
       Date   : 2021-09-20 15:12 UTC (1 days ago)
        
 (HTM) web link (fauna.com)
 (TXT) w3m dump (fauna.com)
        
       | tysont wrote:
       | To add a bit of color from the author, the content in the article
       | was informed by my experience building distributed systems at
       | Microsoft, Amazon, and Riot Games. At Riot we sharded our
       | playerbase for a number of reasons (including complexity of
       | matchmaking), but we may have chosen a different approach if we
       | had a service like Fauna that could push data closer to players
       | at the edge. With centralized relational databases, cross-region
       | calls to load account info, entitlements, etc. would have been a
       | very jarring experience in the client.
       | 
       | I've seen a number of database companies publish blog posts and
       | put out tweets offering a competing point of view: that single-
       | region is enough and multi-region doesn't matter. Would love to
       | engage with that crowd here and get their perspective on the
       | content in the blog post.
        
       | evanweaver wrote:
       | "There are three kinds of lies: lies, damned lies, and
       | benchmarks." - Mark Twain
       | 
       | What other methods does the community use for measuring
       | distributed latency?
        
         | PeterCorless wrote:
         | "We investigate the issue of coordinate stability over time and
         | show that coordinates drift away from their initial values with
         | time, so that 25% of node coordinates become inaccurate by more
         | than 33 ms after one week. However, daily re-computations make
         | 75% of the coordinates stay within 6 ms of their initial
         | values."
         | 
         | That's the intro from a 2007 paper from Google:
         | 
         | https://static.googleusercontent.com/media/research.google.c...
        
         | igouy wrote:
         | _After all, facts are facts, and although we may quote one to
         | another with a chuckle the words of the Wise Statesman, 'Lies--
         | damned lies--and statistics,' still there are some easy figures
         | the simplest must understand, and the astutest cannot wriggle
         | out of._
         | 
         | Leonard Henry Courtney, 1895
        
       | aeyes wrote:
       | What's going on with the latency for the US region on the status
       | page? https://status.fauna.com/#day
       | 
       | 1 second for writes and 400ms for reads? Looks like this has been
       | going on for a week but there is nothing posted about it on the
       | status page.
        
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       (page generated 2021-09-21 23:01 UTC)