is_zarrs_available(),
pizzarr_compiled_features(),
pizzarr_upgrade().tools/cran-build.sh produces a CRAN tarball with
src/ stripped out.#[extendr]
functions, 13 Rust source files.ZarrArray$get_item() and
$set_item() automatically use the zarrs fast path when
eligible (contiguous slices, supported dtype, filesystem or HTTP store).
Unsupported selections fall through to the R-native path silently.zarr_create() dispatches to
the zarrs backend when available. Supports V2 and V3 formats with four
codec presets (none, gzip, blosc, zstd).aperm) to Rust,
eliminating two full-array copies per read and up to five per write.
Cache-blocked tiling for 2D, output-order iteration for nD.zarrs_http crate.
HttpStore-backed arrays use zarrs for parallel chunk decode
on remote data. R-native crul-based path remains as
fallback.object_store crate. New
S3Store R6 class for s3:// URLs. Public
buckets work without credentials (unsigned requests). Authenticated
access uses standard AWS environment variables.object_store crate. New
GcsStore R6 class for gs:// URLs (requires
credentials). Public GCS data accessible via HTTPS endpoint without
credentials.zarrs_close_store().pizzarr_config() function for viewing and setting
concurrency options. Three settings: nthreads (rayon thread
pool size), concurrent_target (codec concurrency level),
and http_batch_range_requests (multipart range toggle for
HTTP stores). All three backed by environment variables
(PIZZARR_NTHREADS, PIZZARR_CONCURRENT_TARGET,
PIZZARR_HTTP_BATCH_RANGE_REQUESTS).zarrs_runtime_info() now includes nthreads
(rayon thread pool size).pizzarr.parallel_backend,
pizzarr.parallel_write_enabled, and
pizzarr.progress_bar options are no longer used. On
r-universe builds, zarrs handles parallelism internally via its Rust
thread pool. On CRAN (pure R), chunk I/O is sequential.pbapply, parallel,
future, and future.apply from Suggests.vignettes/parallel.Rmd. Replaced by
vignettes/zarrs-backend.Rmd.vignettes/zarrs-backend.Rmd documenting the zarrs
backend, dispatch behavior, store types, concurrency tuning, and cloud
access.for loop.set_dimension_names() /
get_dimension_names() methods to ZarrArray
(#170).get_dimension_names() method to
ZarrArray for V3 dimension names support.rasterImage() instead
of the raster package (#161).Fixes a flaky test failing on CRAN – no functional changes.
This is the first release of pizzarr to CRAN. The package has significant testing and validation but has not been vetted by a large and diverse user community. As a result, bugs and undesirable behavior may be found. If you find issues please report them at:
https://github.com/zarr-developers/pizzarr/issues