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@davebryand: if you don’t have a full pro version which supports [HA](http://docs.datomic.com/ha.html), yes.
With an HA configuration, instead of transactor B barging in (at which case transactor A sees it’s no longer got a unique, current claim on heartbeat), transactor B will start in standby mode where it will only take over if transactor A misses two heartbeats (plus a little tolerance).
With pro starter/free, transactor B doesn’t enter standby mode, so it claims heartbeat at which point transactor A self destructs.
Bingo—great explanation, thanks @bkamphaus
Loving Datomic, btw. Great work by the whole team
laforge49 [2:04 PM] Newbie datomic question. Getting started. C:\datomic-pro\datomic-pro-0.9.5344>bin\groovysh.cmd Dec 09, 2015 2:01:15 PM java.util.prefs.WindowsPreferences <init> WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
So I found and tried this: http://stackoverflow.com/questions/16428098/groovy-shell-warning-could-not-open-create-prefs-root-node
Hopefully this will be the end of it. I'm running windows 10, which might have been part of the problem.
@laforge49: why open a groovy shell . When I did the beginners tutorial I did everything in repl
Just following the tutorial. As for opening a repel in my IDE, I'm using cursive and frankly have never opened a repl that way--I use lein.
could you just post a pointer? I'm trying to renew my health care coverage right now. 😄
not a real worry. can probably find something on the web and if not, post something to the clojure chat.
--it was a few days back I started digging into datomic and hopefully today I can get back to it.
@laforge49: see the pinned items in this channel; one of them is some getting-started recipes from the clojure cookbook