shard_apply_policy: Apply Wrapper Policy

In shard: Deterministic, Zero-Copy Parallel Execution for R

Apply Wrapper Policy

Description

Centralizes safe defaults and guardrails for apply/lapply convenience wrappers.

Usage

shard_apply_policy(
  auto_share_min_bytes = "1MB",
  max_gather_bytes = "256MB",
  cow = c("deny", "audit", "allow"),
  profile = c("default", "memory", "speed"),
  block_size = "auto",
  backing = c("auto", "mmap", "shm")
)

Arguments

auto_share_min_bytes	Minimum object size for auto-sharing (default "1MB").
max_gather_bytes	Maximum estimated gathered result bytes before refusing to run (default "256MB").
cow	Copy-on-write policy for borrowed inputs. One of "deny", "audit", or "allow". Default "deny".
profile	Execution profile passed through to shard_map(). One of "default", "memory", or "speed". Default "default".
block_size	Shard block size for apply-style workloads. Default "auto".
backing	Backing type used when auto-sharing ("auto", "mmap", "shm").

Value

An object of class shard_apply_policy.

Examples

cfg <- shard_apply_policy()
cfg

shard documentation built on April 3, 2026, 9:08 a.m.