Does Tokyo Cabinet support in-memory B+ Tree implementation?

Question

Does Tokyo Cabinet support in-memory B+ trees? If so, how do I use them? Because in some web articles (for example here and here), such usage is reported but I can't find any document describing how to do it. Thanks.

Ah yes, the mythical "some article I found" article. – Marc B Apr 09 '12 at 04:42 — Marc B, Apr 09 '12 at 04:42
@MarcB, I modify my question. – Arpssss Apr 09 '12 at 04:48 — Arpssss, Apr 09 '12 at 04:48

score 1 · Accepted Answer · edited Apr 22 '17 at 19:04

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The documentation describes tcadbopen(TCADB *adb, const char *name) as follows:

`name' specifies the name of the database. If it is "*", the database will be an on-memory hash database. If it is "+", the database will be an on-memory tree database.

So, the name "+" does what you want.

edited Apr 22 '17 at 19:04

Alexander Ushakov

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answered Apr 09 '12 at 09:25

Sven

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I try that: means HDB hdb = new HDB(); if(!hdb.open("+", HDB.OWRITER | HDB.OCREAT)). But, it creates a DB named +. – Arpssss Apr 09 '12 at 09:27
The magic for + and * is only available via the abstract interface (-> tcadbopen). – Sven Apr 09 '12 at 09:30
No, the abstract interface is available at the C level, see section "The Abstract Database API" in the documentation. If you are using a binding for another language, the binding could be incomplete. So please consider completing it. – Sven Apr 09 '12 at 10:14

score 1 · Answer 2 · answered Mar 14 '13 at 14:12

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You will also find a good overview of the possibilities of Tokyo Tyrant here: http://korrespondence.blogspot.fr/2009/09/tokyo-tyrant-tuning-parameters.html

answered Mar 14 '13 at 14:12

lizzie

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Does Tokyo Cabinet support in-memory B+ Tree implementation?

2 Answers2