Concurrent batch vectorization requests #4827
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What's being changed:
Send batch requests concurrently if the rate limit is high enough, otherwise keep sequential batching. For example Cohere allows 10k requests/min and we can basically send as many requests in parallel as we want.
With this the 100k sphere dataset with 2 named vectors was vectorized in ~2min using cohere and
collection.batch.fixed_size(concurrent_requests=20, batch_size=96)
.To test use this python client branch weaviate/weaviate-python-client#981 and the profiling/test_sphere.py script.
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