hnswlib

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L2 and dot product space are inconsistent

3

I was trying to reproduce the idea in [this paper](https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/XboxInnerProduct.pdf), where you can prepend a number to your vectors and have l2 space behave exactly like dot product space (look...

h-shahidi

Element top level is rounded towards down

1

Hey, I have noticed that in [getRandomLevel](https://github.com/nmslib/hnswlib/blob/master/hnswlib/hnswalg.h#L148), where the maximum level for a new element in the HNSW graph is generated, the generated number `r` is rounded to the largest...

alonre24

How to get graph result after add_items()

1

@[yurymalkov](https://github.com/nmslib/hnswlib/commits?author=yurymalkov) I need to get the adjacency of the points in each layer. Thx.

Mikey2266

It will be very slow when I add 30000 dim 720 features into it

2

I have init a HierarchicalNSW withm space=L2，maxelements=30000, M=16, ef_construction=200 ef=100 rand_seed=100. and then call addPoint to add feature, at first, it is very fast, but when it goes to 200,...

jonlu5508

do not copy vectors and support mmap files

9

I see a huge potential of improvement at a very low cost. Currently indexes are very optimized in size (and one can control it with parameters) but we still have...

louisabraham

Where is Cosine similarity in C++ version

1

Hi, I'm wondering why there is no cosine space in hnswlib. How to use cosine similarity in C++ version? Thanks

bejoechen

Update removePoint in bruteforce.h

1

- When I add some points and delete all points, unordered_map remains item (bug)

bongmo

multi-node parallel hnsw

7

Dear team, This is a question on whether we can parallel hnsw on different computing node (so distributed memory) but not just on one node. If not, I split my...

jianshu93

chore(ALGO_PARAMS.md): Fix typo

1

Hi there, here's a tiny PR to fix some typos in the HNSW params' docs :slightly_smiling_face:

PLNech

Support deleting elements?

15

Thanks for the great implementation, the performance is impressive. I was wondering what it would take to add the ability to delete an element from the graph without degrading too...

ThomasDelteil