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2021-12-11

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#datomic
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2021-12-11
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hadils13:12:16

I have a Lambda Datomic Ion. I am trying to use cognitect.aws.api for the API :apigwmanagenebtapi When I do a :GetConnection it results in this error: : Name or service not known. I don’t know how to resolve this. Does anyone have some insight to this/ Thanks!

mfikes15:12:09

I can't DNS resolve http://my.datomic.com ; wondering if this is just me

mfikes15:12:19

Given the two comments above, I'm wondering if there are general DNS outages going on.

jaret16:12:16

@mfikes we're rolling out a new version of http://my.datomic.com. Apologies we are working on the issue right now.

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jaret16:12:09

Maintenance should be complete. Please let us know if you encounter any issues.

mfikes17:12:27

@jaret Thanks! Looks like DNS might be good, but I'm seeing a 503 when attempting to pull the artifact 

Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: Could not transfer artifact com.datomic:datomic-pro:pom:1.0.6165 from/to  (): status code: 503, reason phrase: Service Unavailable (503)

Robert A. Randolph17:12:54

We're looking into this.

mfikes17:12:30

If you go to in a browser, it renders {"message":"Service Unavailable"}

Jarrod Taylor (Clojure team)17:12:43

Thanks @mfikes we are still getting everything wired back. Will post back where when fully resolved.

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michele mendel20:12:40

d/datoms for :aevt and :avet looks the same 

(d/datoms db {:index :aevt :components [:inv/color]})
(d/datoms db {:index :avet :components [:inv/color]})
gives 
(#datom[87960930222155 74 "blue" 13194139533319 true])
(#datom[87960930222155 74 "blue" 13194139533319 true])
Shouldn't :avet be 
(#datom[87960930222155 "blue" 74 13194139533319 true])

favila20:12:23

The index refers to sort order not the structure of the datoms returned

favila20:12:04

The datoms are always he same

michele mendel20:12:04

I understand, but has the eavt, aevt and avet their own index? Looking at the file system, I only see log.idx.

michele mendel20:12:17

And why do we get the whole color entity (including type and cardinality) for :eavt ? 

(d/datoms db {:index :eavt :components [:inv/color]}))

(#datom[74 10 :inv/color 13194139533318 true]
 #datom[74 40 23 13194139533318 true]
 #datom[74 41 35 13194139533318 true])

favila00:12:04

To your first question: eavt etc are the indexes. Datomic indexes are covering indexes (ie contain all the data they index—they are not merely pointers to a shared pool). Also the indexes are on disk as blocks(nodes) arranged in a b+tree like structure, there is not a 1-1 correspondence to files

favila00:12:15

To your second: your datom call is asking for the portion of eavt where all E match :inv/color, which in your db resolves to entity 74. So this is exactly what you asked for

favila00:12:49

You are getting the datoms where E is the color attribute itself

favila00:12:30

The first datom in that list is establishing the db ident for the entity, [74 :db/ident :inv/color TX true]

favila00:12:43

10 = the db/ident attribute

ghadi20:12:58

Each datom itself doesn't change, it's the iteration order of all datoms that changes between indices @michelemendel

Jarrod Taylor (Clojure team)21:12:23

@mfikes service at my.datomic should be restored.

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