Re: [Boost-users] [multiindex] Why not to add B+Tree index to multiIndex?

Subject: Re: [Boost-users] [multiindex] Why not to add B+Tree index to multiIndex?
From: Dilts, Daniel D. (ddilts_at_[hidden])
Date: 2008-11-21 08:27:16

>> we can use multiindex as a memory db,but the multiindex only support
>> hash index and Order index(RB TREE),why not to add b+ Tree Index to
>> multiindex to make it much faster .

>I'm no expert in B+ trees, but I understand that these structures are
>more effective than regular binary trees when secondary storage (i.e.
>hard disk) is used, which is not the case for an in-memory container
>like multi_index_container. Have you any reference on the performance
>of B+ trees in in-memory scenarios?

My understanding is that B-tree variants are better for secondary storage lookups and T-trees are better for in-memory lookup.
 
A quick reference would be http://en.wikipedia.org/wiki/T-tree  .  I know that isn't a definitive source, but I would think it would be a good place to start looking.

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