Get or set pizzarr configuration — pizzarr

Controls parallelism and HTTP behaviour for the zarrs backend. Called with no arguments, returns the current settings as a named list. Called with arguments, sets the specified options and applies them to the Rust backend immediately.

Usage

pizzarr_config(
  nthreads = NULL,
  concurrent_target = NULL,
  http_batch_range_requests = NULL
)

Arguments

nthreads: Integer or NULL. Number of threads for the rayon thread pool. NULL uses all CPUs (the default). The pool can only be initialised once per R session; later changes require a restart. Use the PIZZARR_NTHREADS environment variable for reliable session-level control.
concurrent_target: Integer or NULL. Codec concurrency level — how many codec operations zarrs runs in parallel within a single read/write call. NULL uses the zarrs default (CPU count). Can be changed at any time.
http_batch_range_requests: Logical or NULL. Whether HTTP stores use multipart range requests (default TRUE). Set to FALSE for servers with incomplete multipart range support. Takes effect on the next zarr_open() or zarrs_get_subset() call that opens a new HTTP store; existing cached stores are not affected (use zarrs_close_store(url) to force re-creation).

Value

When called with no arguments, a named list of current settings. When called with arguments, the previous values (invisibly).