segment: Shared Memory Segment
In shard: Deterministic, Zero-Copy Parallel Execution for R
segment R Documentation
Shared Memory Segment
Description
Low-level shared memory segment operations for cross-process
data sharing. These functions provide the foundation for the higher-level
share() and buffer() APIs.
Details
Segments can be backed by:
-
"shm": POSIX shared memory (Linux/macOS) or named file
mapping (Windows). Faster but may have size limitations.
-
"mmap": File-backed memory mapping. Works on all platforms
and supports larger sizes.
-
"auto": Let the system choose the best option.
All segments are created with secure permissions (0600 on Unix) and are
automatically cleaned up when the R object is garbage collected.
shard documentation built on April 3, 2026, 9:08 a.m.
R Package Documentation
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| segment | R Documentation |
Shared Memory Segment
Description
Low-level shared memory segment operations for cross-process
data sharing. These functions provide the foundation for the higher-level
share() and buffer() APIs.
Details
Segments can be backed by:
-
"shm": POSIX shared memory (Linux/macOS) or named file mapping (Windows). Faster but may have size limitations. -
"mmap": File-backed memory mapping. Works on all platforms and supports larger sizes. -
"auto": Let the system choose the best option.
All segments are created with secure permissions (0600 on Unix) and are automatically cleaned up when the R object is garbage collected.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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