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Update Download Types

Scott E. Graves 2025-02-23 18:13:58 -06:00
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Download-Types.md

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The `PreferredDownloadType` setting in `config.json` determines which of these modes is preferred. This does not guarantee the mode will always be chosen, as `repertory` will choose an appropriate mode based on the type of file operation being performed. If a file is currently open in read mode and a request to write is performed, the file will automatically be changed to `default` mode without any interruptions to file i/o.
1. Default
## Default
* In `default` mode, a file of equal size is fully allocated within the`cache` directory.
* File read/write occurs in 8MiB chunks for files that are not currently in cache.
* Even though writes occur within 1 or more 8MiB chunks, the file will not be scheduled for upload until all chunks have been downloaded.
* This mode will be forced if any request to write is performed.
* This mode supports read and write.
2. Ring buffer
## Ring buffer
* In `ring_buffer` mode, a fixed-size file (default 1GiB) is allocated within the `buffer` directory.
* This mode will cache up to 1GiB of a file locally preventing the need to fully allocate a file for read operations.
* This mode is only chosen when the actual file size is greater than the ring-buffer size.
* This mode only supports read.
3. Direct
## Direct
* In `direct` mode, files are read directly from the corresponding provider without any local caching.
* This mode only supports read.