# How to efficiently query large-scale cell feature data with AllenSDK?

**URL:** <https://community.brain-map.org/t/how-to-efficiently-query-large-scale-cell-feature-data-with-allensdk/4677>\
**Category:** Technical\
**Created:** [August 29, 2025, 12:38pm UTC](https://community.brain-map.org/t/how-to-efficiently-query-large-scale-cell-feature-data-with-allensdk/4677 "2025-08-29T12:38:39Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![hedij](https://avatars.discourse-cdn.com/v4/letter/h/ed8c4c/32.png) [@hedij](https://community.brain-map.org/u/hedij)\
**Post date:** [August 29, 2025, 12:38pm UTC](https://community.brain-map.org/t/how-to-efficiently-query-large-scale-cell-feature-data-with-allensdk/4677/1 "2025-08-29T12:38:39Z")

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Hello

I have been exploring the AllenSDK for accessing large-scale cell feature datasets, and while the API works well for smaller queries, I’m running into challenges when attempting to pull down and process larger slices of data. 😇

For eg, trying to extract detailed electrophysiology features across thousands of cells often times out or requires significant memory handling on my local machine.🙂 I’m wondering if there are recommended best practices for structuring such queries more efficiently.

Some documentation points toward batching requests, but I haven’t found a clear end-to-end example of how to manage this workflow without either overwhelming memory or missing out on important metadata. 🤔

It would be really helpful to have a reference or a working code snippet that demonstrates how to query, batch, and store large datasets in a reproducible way. 🙂 Checked [Cell Types — Allen SDK dev documentation](https://allensdk.readthedocs.io/en/latest/cell_types.html) guide related to this and found it quite informative.

In a related context, I was reading about [what is Microsoft SQL Server](https://www.igmguru.com/blog/what-is-microsoft-sql-server) and it struck me how similar approaches in database optimization—like indexing or partitioning—might be applied here to speed up data retrieval. 🤔

Does the AllenSDK already support optimizations like this, or should we be handling that layer entirely on the client side?🤔

Thank you !!🙂

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**Author:** ![discourse\_ai\_spam](https://avatars.discourse-cdn.com/v4/letter/d/c68b51/32.png) [@discourse\_ai\_spam](https://community.brain-map.org/u/discourse_ai_spam)\
**Post date:** [August 29, 2025, 12:38pm UTC](https://community.brain-map.org/t/how-to-efficiently-query-large-scale-cell-feature-data-with-allensdk/4677/2 "2025-08-29T12:38:46Z")

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**Author:** ![system](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.brain-map.org/system/32/15_2.png) [@system](https://community.brain-map.org/u/system)\
**Post date:** [August 31, 2025, 9:30pm UTC](https://community.brain-map.org/t/how-to-efficiently-query-large-scale-cell-feature-data-with-allensdk/4677/3 "2025-08-31T21:30:02Z")

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