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Fix or Remove Morton Order in Volume Data Fossil Keys #3546

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jstriebel opened this issue Dec 7, 2018 · 0 comments · Fixed by #7917
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Fix or Remove Morton Order in Volume Data Fossil Keys #3546

jstriebel opened this issue Dec 7, 2018 · 0 comments · Fixed by #7917
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@jstriebel
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jstriebel commented Dec 7, 2018

Currently the FossilDB keys for volume data contain the Morton Order number. This is currently unused and broken, because

  • we do not write multiple buckets, so that the Morton order would help.
  • the Morton order number in the key does not contain leading zeroes, making this useless.
  • the number only has 32bit which is not enough (breaking around 1000 buckets per dimension). This also lead to negative numbers (leading to bug Download of small volume tracings produces 0 b data.zip #3540), why we are currently not using this part of the key anymore.

We should either remove the Morton order part of the key, or make it useful again at a point. This involves rewriting the database.

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