A blocking, shuffling and lossless compression library
Blosc is a high performance compressor optimized for binary data. It has been designed to transmit data to the processor cache faster than the traditional, non-compressed, direct memory fetch approach via a memcpy() OS call. Blosc is the first compressor (that I'm aware of) that is meant not only to reduce the size of large datasets on-disk or in-memory, but also to accelerate memory-bound computations.
It uses the blocking technique to reduce activity on the memory bus as much as possible. In short, this technique works by dividing datasets in blocks that are small enough to fit in caches of modern processors and perform compression / decompression there. It also leverages, if available, SIMD instructions (SSE2) and multi-threading capabilities of CPUs, in order to accelerate the compression / decompression process to a maximum.
Blosc is actually a metacompressor, that meaning that it can use a range of compression libraries for performing the actual compression/decompression. Right now, it comes with integrated support for BloscLZ (the original one), LZ4, LZ4HC, Snappy and Zlib. Blosc comes with full sources for all compressors, so in case it does not find the libraries installed in your system, it will compile from the included sources and they will be integrated into the Blosc library anyway. That means that you can trust in having all supported compressors integrated in Blosc in all supported platforms.
- Developed at Archiving
- Sources inherited from project openSUSE:Factory
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osc -A https://api.opensuse.org checkout openSUSE:Backports:SLE-15-SP4:FactoryCandidates/blosc && cd $_ - Create Badge
Source Files
| Filename | Size | Changed |
|---|---|---|
| blosc-1.16.3.tar.gz | 0000844235 824 KB | |
| blosc.changes | 0000019591 19.1 KB | |
| blosc.spec | 0000003679 3.59 KB |
Revision 13 (latest revision is 24)
Dominique Leuenberger (dimstar_suse)
accepted
request 707454
from
Martin Pluskal (pluskalm)
(revision 13)
- Update to version 1.16.3: * Fix for building for clang with -march=haswell. See PR #262. * Fix all the known warnings for GCC/Clang. Still some work to do for MSVC in this front. * Due to some problems with several CI systems, the check for library symbols are deactivated now by default. If you want to enforce this check, use: cmake .. -DDEACTIVATE_SYMBOLS_CHECK=ON to re-activate it. * Correct the check for the compressed size when the buffer is memcpyed. This was a regression introduced in 1.16.0. Fixes #261. * Fixed a regression in 1.16.0 that prevented to compress empty buffers (see #260). * Now the functions that execute Blosc decompressions are safe by default for untrusted/possibly corrupted inputs. * The previous functions (with less safety) checks are still available with a '_unsafe' suffix. The complete list is: * Also, a new API function named blosc_cbuffer_validate(), for validating Blosc compressed data, has been added. * For details, see PR #258. Thanks to Jeremy Maitin-Shepard. * Fixed a bug in blosc_compress() that could lead to thread deadlock under some situations. See #251. Thanks to @wenjuno for the report and the fix. * Fix data race in shuffle.c host_implementation initialization. Fixes #253. Thanks to Jeremy Maitin-Shepard. * Add workaround for Visual Studio 2008's lack of a stdint.h file to blosclz.c. * Replaced //-comments with /**/-comments and other improvements for compatibility with quite old gcc compilers. See PR #243. Thanks to Andreas Martin. * Empty buffers can be compressed again (this was unadvertedly prevented while fixing #234). See #247. Thanks to Valentin Haenel.
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