# Latest **URL:** https://forum.tiledb.com/latest.md [Latest](https://forum.tiledb.com/latest.md) · [Categories](https://forum.tiledb.com/categories.md) --- ## [Tile capacity when capacity = 0 in Python API?](https://forum.tiledb.com/t/tile-capacity-when-capacity-0-in-python-api/821)
**Author:** [@bskubi](https://forum.tiledb.com/u/bskubi)\ **Replies:** 1\ **Last updated:** [February 6, 2026, 3:52pm UTC](https://forum.tiledb.com/t/tile-capacity-when-capacity-0-in-python-api/821 "2026-02-06T15:52:56Z")
In the Python API, it appears the default value of capacity is 0 when calling tiledb.SparseArray.create(). I am assuming that the actual capacity of a TileDB tile using this default value is not actually 0 and that this … --- ## [How to organize tiledb files on disk?](https://forum.tiledb.com/t/how-to-organize-tiledb-files-on-disk/825)
**Author:** [@atp](https://forum.tiledb.com/u/atp)\ **Replies:** 0\ **Last updated:** [January 30, 2026, 7:21pm UTC](https://forum.tiledb.com/t/how-to-organize-tiledb-files-on-disk/825 "2026-01-30T19:21:56Z")
I’ve just started trying to use the R tiledb package. I see lots of R examples, which is great, except that they all seem to use very small amounts of data. Are there any examples that take a larger amount of data, and… --- ## [Parallel gVCF import, possible?](https://forum.tiledb.com/t/parallel-gvcf-import-possible/816)
**Author:** [@Michaeljon\_Miller](https://forum.tiledb.com/u/Michaeljon_Miller)\ **Replies:** 4\ **Last updated:** [December 5, 2025, 5:10pm UTC](https://forum.tiledb.com/t/parallel-gvcf-import-possible/816 "2025-12-05T17:10:48Z")
We run several hundred sequences through our variant calling pipeline every day. When a sequence passes automated QC a workflow is fired off to import the resulting gVCF into our s3 tiledb store. Is there any reason we c… --- ## [VCF store with ~2000 gVCF files, can't export](https://forum.tiledb.com/t/vcf-store-with-2000-gvcf-files-cant-export/815)
**Author:** [@Michaeljon\_Miller](https://forum.tiledb.com/u/Michaeljon_Miller)\ **Replies:** 0\ **Last updated:** [November 11, 2025, 12:43am UTC](https://forum.tiledb.com/t/vcf-store-with-2000-gvcf-files-cant-export/815 "2025-11-11T00:43:14Z")
Before turning the keys over to our researchers, who I know are know are going to try to export data to multi-sample gVCF, I thought I’d try something simple. So I imported a subset of our gVCF data into a bucket on S3. … --- ## [More meta GetBlob requests than expected](https://forum.tiledb.com/t/more-meta-getblob-requests-than-expected/812)
**Author:** [@emil.f](https://forum.tiledb.com/u/emil.f)\ **Replies:** 4\ **Last updated:** [October 30, 2025, 10:16am UTC](https://forum.tiledb.com/t/more-meta-getblob-requests-than-expected/812 "2025-10-30T10:16:47Z")
I am trying out running TileDB with Azure and is doing some performance investigations. One thing that I have noted is that TileDB creates a lot of GetBlob requests in Azure to get the meta data. In my test script I am … --- ## [TileDB documentation and Time dimension](https://forum.tiledb.com/t/tiledb-documentation-and-time-dimension/814)
**Author:** [@rhuesken](https://forum.tiledb.com/u/rhuesken)\ **Replies:** 0\ **Last updated:** [October 26, 2025, 7:27pm UTC](https://forum.tiledb.com/t/tiledb-documentation-and-time-dimension/814 "2025-10-26T19:27:16Z")
I’m new to tiledb, and I’m still evaluating its usefullness. However, I must confess things remain mystical. The C# API docs are not helping me (e.g. the description of the query.GetDefaultChannel() (“Returns the query’s… --- ## [Repeated Array reads get slower](https://forum.tiledb.com/t/repeated-array-reads-get-slower/807)
**Author:** [@BrandonSmithJ](https://forum.tiledb.com/u/BrandonSmithJ)\ **Replies:** 1\ **Last updated:** [August 14, 2025, 12:45am UTC](https://forum.tiledb.com/t/repeated-array-reads-get-slower/807 "2025-08-14T00:45:18Z")
I’m facing an issue where repeatedly reading over the dataset gets slower with each read. I’ve included stats below, which are generated by repeatedly calculating the mean over the entire Array. Note that this is specifi… --- ## [Conversion of large Anndata object to Experiment takes a lot of RAM](https://forum.tiledb.com/t/conversion-of-large-anndata-object-to-experiment-takes-a-lot-of-ram/741)
**Author:** [@bputzeys](https://forum.tiledb.com/u/bputzeys)\ **Replies:** 16\ **Last updated:** [July 24, 2025, 5:21am UTC](https://forum.tiledb.com/t/conversion-of-large-anndata-object-to-experiment-takes-a-lot-of-ram/741 "2025-07-24T05:21:56Z")
Hello, I want to convert an Anndata object to TileDB Experiment directly on an S3 bucket. This works nicely for smaller datasets (\<10GBs). However, for larger ones (21GBs in this case) RAM usage becomes the bottleneck. … --- ## [Query missing/NaN values](https://forum.tiledb.com/t/query-missing-nan-values/769)
**Author:** [@nick-youngblut](https://forum.tiledb.com/u/nick-youngblut)\ **Replies:** 2\ **Last updated:** [July 23, 2025, 10:13pm UTC](https://forum.tiledb.com/t/query-missing-nan-values/769 "2025-07-23T22:13:11Z")
Query Conditions | TileDB Embedded Docs does not provide examples of querying for missing (NaN) values. How does one perform the equivalent of isna() or == None for querying in tiledb? --- ## [Bypassing decompression for Space Tile Reads](https://forum.tiledb.com/t/bypassing-decompression-for-space-tile-reads/783)
**Author:** [@weathernutt](https://forum.tiledb.com/u/weathernutt)\ **Replies:** 2\ **Last updated:** [April 22, 2025, 2:09pm UTC](https://forum.tiledb.com/t/bypassing-decompression-for-space-tile-reads/783 "2025-04-22T14:09:34Z")
Hi all! Let me start with a quick acknowledgment: I am not familiar how TileDB handles (de)compression under the hood. I am interested in reading raw (compressed) space tile data for a TileDB-backed API I am working on… --- ## [Metadata Search in Python TileDB SOMA Package](https://forum.tiledb.com/t/metadata-search-in-python-tiledb-soma-package/788)
**Author:** [@psag](https://forum.tiledb.com/u/psag)\ **Replies:** 1\ **Last updated:** [April 11, 2025, 2:14am UTC](https://forum.tiledb.com/t/metadata-search-in-python-tiledb-soma-package/788 "2025-04-11T02:14:34Z")
I have a question regarding the Python TileDB SOMA package. Is there a method or function available to search metadata? For instance, let’s say I have registered a SOMA Experiment with the metadata {“analyst”: “Johnny B… --- ## [Optimizing TileDB Query Performance for GEDI Data](https://forum.tiledb.com/t/optimizing-tiledb-query-performance-for-gedi-data/776)
**Author:** [@Simon\_Besnard](https://forum.tiledb.com/u/Simon_Besnard)\ **Replies:** 0\ **Last updated:** [February 27, 2025, 1:48pm UTC](https://forum.tiledb.com/t/optimizing-tiledb-query-performance-for-gedi-data/776 "2025-02-27T13:48:14Z")
Hi everyone, I’m working with a TileDB array to store and query GEDI data. The array includes spatial (latitude, longitude) and temporal dimensions, with variables stored as attributes. I want to get feedback on two asp… --- ## [Searching or Changing OME data](https://forum.tiledb.com/t/searching-or-changing-ome-data/765)
**Author:** [@Tim\_Turner](https://forum.tiledb.com/u/Tim_Turner)\ **Replies:** 4\ **Last updated:** [January 22, 2025, 10:25pm UTC](https://forum.tiledb.com/t/searching-or-changing-ome-data/765 "2025-01-22T22:25:00Z")
If I ingest OME TIFF images into tiledb, is there a way to search the OME metadata directly? Or would I have to copy parts to “attributes” of the image in order to search it? Similar question with changing the metadata… --- ## [Multi-range query with R](https://forum.tiledb.com/t/multi-range-query-with-r/764)
**Author:** [@julio514](https://forum.tiledb.com/u/julio514)\ **Replies:** 1\ **Last updated:** [January 16, 2025, 10:47pm UTC](https://forum.tiledb.com/t/multi-range-query-with-r/764 "2025-01-16T22:47:25Z")
I have a large tiledb database with 144000 fragments. At some point, I need to select that database by multi-range indexes. With python, it works well, Let’s say I need to select indexes 3 and 6, I can do the following w… --- ## [Multi index writting in dense arrays](https://forum.tiledb.com/t/multi-index-writting-in-dense-arrays/762)
**Author:** [@yoshi](https://forum.tiledb.com/u/yoshi)\ **Replies:** 2\ **Last updated:** [January 16, 2025, 10:50pm UTC](https://forum.tiledb.com/t/multi-index-writting-in-dense-arrays/762 "2025-01-16T22:50:46Z")
Hello, I have a tiledb array, and given a set of rows, i would like to update said rows by assigning it a matrix: index=\[0,2,4\] with tiledb.open("dense\_array1", 'w') as A: A\[index,:\] = data\[index,:\] but i get the… --- ## [Importing parquet file as a 2d dense array](https://forum.tiledb.com/t/importing-parquet-file-as-a-2d-dense-array/758)
**Author:** [@yoshi](https://forum.tiledb.com/u/yoshi)\ **Replies:** 2\ **Last updated:** [January 15, 2025, 8:58pm UTC](https://forum.tiledb.com/t/importing-parquet-file-as-a-2d-dense-array/758 "2025-01-15T20:58:29Z")
Hello, I have a parquet file that has a matrix of Samples x Features (all features are same data type), and would like to create a TileDB object, where the row number and the feature# are the dimensions (as in I access… --- ## [How to Handle Corrupted or Missing Fragments in TileDB with S3 Backend](https://forum.tiledb.com/t/how-to-handle-corrupted-or-missing-fragments-in-tiledb-with-s3-backend/761)
**Author:** [@Simon\_Besnard](https://forum.tiledb.com/u/Simon_Besnard)\ **Replies:** 0\ **Last updated:** [January 13, 2025, 3:11pm UTC](https://forum.tiledb.com/t/how-to-handle-corrupted-or-missing-fragments-in-tiledb-with-s3-backend/761 "2025-01-13T15:11:56Z")
Hello TileDB Community, I am currently working with TileDB arrays stored on an S3 bucket (array\_uri) and am encountering an issue with corrupted or missing fragments causing errors when accessing the array. Here’s a det… --- ## [Github Copilot with TileDB Embedded](https://forum.tiledb.com/t/github-copilot-with-tiledb-embedded/750)
**Author:** [@vichu\_ors](https://forum.tiledb.com/u/vichu_ors)\ **Replies:** 6\ **Last updated:** [January 10, 2025, 1:55am UTC](https://forum.tiledb.com/t/github-copilot-with-tiledb-embedded/750 "2025-01-10T01:55:30Z")
Hi everyone, I am not use if this is the correct forum for this because it relates more with TileDB embedded and Github Copilot than TileDB-cloud proper. Has anyone else noticed that with: VS Code Jupyter notebooks Git… --- ## [Best strategy for writing and consolidating GEDI Data with orbit-based characteristics](https://forum.tiledb.com/t/best-strategy-for-writing-and-consolidating-gedi-data-with-orbit-based-characteristics/744)
**Author:** [@Simon\_Besnard](https://forum.tiledb.com/u/Simon_Besnard)\ **Replies:** 0\ **Last updated:** [November 21, 2024, 3:39pm UTC](https://forum.tiledb.com/t/best-strategy-for-writing-and-consolidating-gedi-data-with-orbit-based-characteristics/744 "2024-11-21T15:39:41Z")
Hi TileDB community, I’m working on storing and querying GEDI (Global Ecosystem Dynamics Investigation) data in TileDB. GEDI data is collected in orbit tracks, resulting in granules with characteristics that pose challe… --- ## [Storage and Query Performance in TileDB](https://forum.tiledb.com/t/storage-and-query-performance-in-tiledb/742)
**Author:** [@almaalice098](https://forum.tiledb.com/u/almaalice098)\ **Replies:** 1\ **Last updated:** [November 18, 2024, 4:27pm UTC](https://forum.tiledb.com/t/storage-and-query-performance-in-tiledb/742 "2024-11-18T16:27:06Z")
Hello I am exploring tile db for managing large scale multi dimensional data. What are the best practices for optimizing data storage and query performance? are there any recommended tools or integrations for visualizi… --- ## [How to access Marketplace](https://forum.tiledb.com/t/how-to-access-marketplace/650)
**Author:** [@cleanthes](https://forum.tiledb.com/u/cleanthes)\ **Replies:** 1\ **Last updated:** [November 18, 2024, 11:06am UTC](https://forum.tiledb.com/t/how-to-access-marketplace/650 "2024-11-18T11:06:08Z")
How do I get access to the TileDB marketplace feature? It says it’s in beta, and I cannot find it anywhere. Is it available for individuals, or only for organizations? --- ## [Optimal TileDB Structure and Querying Procedure for Spaceborne Lidar (GEDI) Data](https://forum.tiledb.com/t/optimal-tiledb-structure-and-querying-procedure-for-spaceborne-lidar-gedi-data/737)
**Author:** [@Simon\_Besnard](https://forum.tiledb.com/u/Simon_Besnard)\ **Replies:** 0\ **Last updated:** [October 31, 2024, 5:24pm UTC](https://forum.tiledb.com/t/optimal-tiledb-structure-and-querying-procedure-for-spaceborne-lidar-gedi-data/737 "2024-10-31T17:24:58Z")
I am working on an optimal TileDB architecture and querying routine for spaceborne Lidar data from the GEDI mission. GEDI data, organized by orbit, includes variables at different levels of granularity: Shot-level Vari… --- ## [Data structure for Lidar data](https://forum.tiledb.com/t/data-structure-for-lidar-data/735)
**Author:** [@Simon\_Besnard](https://forum.tiledb.com/u/Simon_Besnard)\ **Replies:** 2\ **Last updated:** [October 31, 2024, 4:24pm UTC](https://forum.tiledb.com/t/data-structure-for-lidar-data/735 "2024-10-31T16:24:24Z")
I am trying to build a tileDB array to store sparse Lidar data (GEDI data). I managed to build up and write the data to my tiled array, but then I could not read back the data based on spatial and temporal indexing. Eit… --- ## [Create tiledbvcf dataset on azure on MacOS](https://forum.tiledb.com/t/create-tiledbvcf-dataset-on-azure-on-macos/730)
**Author:** [@jpissinis](https://forum.tiledb.com/u/jpissinis)\ **Replies:** 4\ **Last updated:** [October 15, 2024, 5:51pm UTC](https://forum.tiledb.com/t/create-tiledbvcf-dataset-on-azure-on-macos/730 "2024-10-15T17:51:06Z")
Hi, I have installed tiledbvcf-py and tiledb using conda. The versions are: TileDB-VCF version 0.34.1 TileDB version 2.25.0 htslib version 1.20 I am trying to create a dataset on an azure storage account authenticat… --- ## [TileDB Resource Requirements for Image Processing](https://forum.tiledb.com/t/tiledb-resource-requirements-for-image-processing/722)
**Author:** [@Andor\_Markus](https://forum.tiledb.com/u/Andor_Markus)\ **Replies:** 1\ **Last updated:** [October 14, 2024, 3:20pm UTC](https://forum.tiledb.com/t/tiledb-resource-requirements-for-image-processing/722 "2024-10-14T15:20:56Z")
Hi TileDB Community, We are evaluating TileDB for slicing image data stored in arrays. According to the documentation, it’s recommended to have nodes with at least 24GB of memory and 8 CPUs, which translates to a 1:3 CP… --- ## [Labeled dimensions](https://forum.tiledb.com/t/labeled-dimensions/489)
**Author:** [@royassis](https://forum.tiledb.com/u/royassis)\ **Replies:** 3\ **Last updated:** [August 27, 2024, 11:20am UTC](https://forum.tiledb.com/t/labeled-dimensions/489 "2024-08-27T11:20:02Z")
Hello Im using tiledb-py. Is there any idea when labeled dimensions will be implemented and available ? --- ## [How to connect to TileDB Cloud programmatically](https://forum.tiledb.com/t/how-to-connect-to-tiledb-cloud-programmatically/707)
**Author:** [@damianos.melidis](https://forum.tiledb.com/u/damianos.melidis)\ **Replies:** 5\ **Last updated:** [August 20, 2024, 3:10pm UTC](https://forum.tiledb.com/t/how-to-connect-to-tiledb-cloud-programmatically/707 "2024-08-20T15:10:10Z")
Hey tiledb team, I am trying out the 101 Population Genomics tutorial. After installing the package through conda and pip I tried to run the 1st snippet containing: vcf\_bucket = "s3://tiledb-inc-demo-data/examples/not… --- ## [Tiledbvcf installation error on MacOS](https://forum.tiledb.com/t/tiledbvcf-installation-error-on-macos/710)
**Author:** [@Phil\_Appleby](https://forum.tiledb.com/u/Phil_Appleby)\ **Replies:** 2\ **Last updated:** [August 20, 2024, 12:53pm UTC](https://forum.tiledb.com/t/tiledbvcf-installation-error-on-macos/710 "2024-08-20T12:53:40Z")
I have installed tiledb and tiledbvcf-py via the tiledb conda channel. “tiledbvcf --version” from the command line gives the floowing output: TileDB-VCF version 0.34.1 TileDB version 2.25.0 htslib version 1.20 Howev… --- ## [Getting index to retrieve image](https://forum.tiledb.com/t/getting-index-to-retrieve-image/683)
**Author:** [@Tim\_Turner](https://forum.tiledb.com/u/Tim_Turner)\ **Replies:** 4\ **Last updated:** [August 8, 2024, 2:41am UTC](https://forum.tiledb.com/t/getting-index-to-retrieve-image/683 "2024-08-08T02:41:40Z")
I am trying to understand what is returned when I write/ingest image into tiledb. The docs say an index is not returned. In this tiledb cloud ingestion example it also doesn’t return anything. How do I retrieve it lat… --- ## [How to delete an object](https://forum.tiledb.com/t/how-to-delete-an-object/702)
**Author:** [@Tim\_Turner](https://forum.tiledb.com/u/Tim_Turner)\ **Replies:** 4\ **Last updated:** [August 1, 2024, 4:19pm UTC](https://forum.tiledb.com/t/how-to-delete-an-object/702 "2024-08-01T16:19:58Z")
I want to delete an object based on an id attribute. here is my code: def delete\_hierarchy\_from\_tiledb(uri, ctx, hierarchy\_id): print(f"Deleting hierarchy with ID at uri: {hierarchy\_id} at {uri}") try: … [Next page](https://forum.tiledb.com/latest.md?page=1)