[Fix] Do not buffer files in memory when downloading #1599
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pietern
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andrewnester
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CLI: * [Fix] Do not buffer files in memory when downloading ([#1599](#1599)). Bundles: * Allow artifacts (JARs, wheels) to be uploaded to UC Volumes ([#1591](#1591)). * Upgrade TF provider to 1.48.3 ([#1600](#1600)). * Fixed job name normalisation for bundle generate ([#1601](#1601)). Internal: * Add UUID to uniquely identify a deployment state ([#1595](#1595)). * Track multiple locations associated with a `dyn.Value` ([#1510](#1510)). * Attribute Terraform API requests the CLI ([#1598](#1598)). * Use local Terraform state only when lineage match ([#1588](#1588)). * Implement readahead cache for Workspace API calls ([#1582](#1582)). Dependency updates: * Bump github.com/databricks/databricks-sdk-go from 0.43.0 to 0.43.2 ([#1594](#1594)).
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andrewnester
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CLI: * Do not buffer files in memory when downloading ([#1599](#1599)). Bundles: * Allow artifacts (JARs, wheels) to be uploaded to UC Volumes ([#1591](#1591)). * Upgrade TF provider to 1.48.3 ([#1600](#1600)). * Fixed job name normalisation for bundle generate ([#1601](#1601)). Internal: * Add UUID to uniquely identify a deployment state ([#1595](#1595)). * Track multiple locations associated with a `dyn.Value` ([#1510](#1510)). * Attribute Terraform API requests the CLI ([#1598](#1598)). * Implement readahead cache for Workspace API calls ([#1582](#1582)). * Use local Terraform state only when lineage match ([#1588](#1588)). Dependency updates: * Bump github.com/databricks/databricks-sdk-go from 0.43.0 to 0.43.2 ([#1594](#1594)).
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CLI: * Do not buffer files in memory when downloading ([#1599](#1599)). Bundles: * Allow artifacts (JARs, wheels) to be uploaded to UC Volumes ([#1591](#1591)). * Upgrade TF provider to 1.48.3 ([#1600](#1600)). * Fixed job name normalisation for bundle generate ([#1601](#1601)). Internal: * Add UUID to uniquely identify a deployment state ([#1595](#1595)). * Track multiple locations associated with a `dyn.Value` ([#1510](#1510)). * Attribute Terraform API requests the CLI ([#1598](#1598)). * Implement readahead cache for Workspace API calls ([#1582](#1582)). * Use local Terraform state only when lineage match ([#1588](#1588)). * Add read-only mode for extension aware workspace filer ([#1609](#1609)). Dependency updates: * Bump github.com/databricks/databricks-sdk-go from 0.43.0 to 0.43.2 ([#1594](#1594)).
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Changes
This PR fixes a performance bug that led downloaded files (e.g. with
databricks fs cp dbfs:/Volumes/.../somefile .) to be buffered in memory before being written.Results from profiling the download of a ~100MB file:
Before:
After:
Note that this fix is temporary. A longer term solution should be to use the API provided by the Go SDK rather than making an HTTP request directly from the CLI.
fix #1575
Tests
Verified that the CLI properly downloads the file when doing the profiling.