Port variant py39
Summary Sliding window memory map manager (3.9)
Package version 5.0.0
Keywords python
Maintainer Python Automaton
License Not yet specified
Other variants py310
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Ravensource Port Directory | History
Last modified 20 NOV 2021, 04:14:38 UTC
Port created 16 APR 2018, 00:49:48 UTC
Subpackage Descriptions
single ## Motivation When reading from many possibly large files in a fashion similar to random access, it is usually the fastest and most efficient to use memory maps. Although memory maps have many advantages, they represent a very limited system resource as every map uses one file descriptor, whose amount is limited per process. On 32 bit systems, the amount of memory you can have mapped at a time is naturally limited to theoretical 4GB of memory, which may not be enough for some applications. ## Limitations * **System resources (file-handles) are likely to be leaked!** This is due to the library authors reliance on a deterministic `__del__()` destructor. * The memory access is read-only by design. ## Overview ![Python package] Smmap wraps an interface around mmap and tracks the mapped files as well as the amount of clients who use it. If the system runs out of resources, or if a memory limit is reached, it will automatically unload unused maps to allow continued operation. To allow processing large files even on 32 bit systems, it allows only portions of the file to be mapped. Once the user reads beyond the mapped region, smmap will automatically map the next required region, unloading unused regions using a LRU algorithm. Although the library can be used most efficiently with its native interface, a Buffer implementation is provided to hide these details behind a simple string-like interface. For performance critical 64 bit applications, a simplified version of memory mapping is provided which always maps the whole file, but still provides the benefit of unloading unused mappings on demand. ## Prerequisites * Python 3.6+ * OSX, Windows or Linux The package was tested on all of the previously mentioned configurations. ## Installing smmap [Documentation Status] Its easiest to install smmap using the [pip] program: ```bash $ pip install smmap ``` As the command will install smmap in your respective python distribution, you will most likely need root permissions to authorize the required changes. If you have downloaded the source archive, the package can be installed by running the `` script: ```bash $ python install ``` It is advised to have a look at the **Usage Guide** for a brief introduction on the different database implementations. ## Homepage and Links The project is home on github at . The latest source can be cloned from github as well: * git:// For support, please use the git-python mailing list: * Issues can be filed on github: * A link to the pypi page related to this repository: * ## License Information *smmap* is licensed under the New BSD License.
Configuration Switches (platform-specific settings discarded)
PY310 OFF Build using Python 3.10 PY39 ON Build using Python 3.9
Package Dependencies by Type
Build (only) python-pip:single:py39
Build and Runtime python39:single:standard
Download groups
main mirror://PYPIWHL/6d/01/7caa71608bc29952ae09b0be63a539e50d2484bc37747797a66a60679856
Distribution File Information
2aba19d6a040e78d8b09de5c57e96207b09ed71d8e55ce0959eeee6c8e190d94 24271 smmap-5.0.0-py3-none-any.whl
Ports that require python-smmap:py39
python-gitdb:py39 Git Object Database (3.9)
python-smmap2:py39 Sliding memory map manager (3.9)