3564b711b4
This popped up because Fedora mandates warning-free builds, and get_chksum triggers a warning because it returns an unaligned pointer (it is so analigned, static analysis in the compiler can detect it). The easiest fix is to remove it altogether. We think it should be safe, because: - The function is not listed in any headers - Its counterpart is called "set_checksum", not "set_chksum" - PyECLib does not use it We also hush some doxygen warnings about wrong comments. Change-Id: Ie5bc736f912706e0ffd507765abd24e7f4761233
liberasurecode
liberasurecode is an Erasure Code API library written in C with pluggable Erasure Code backends.
Highlights
-
Unified Erasure Coding interface for common storage workloads.
-
Pluggable Erasure Code backends - liberasurecode supports the following backends:
- 'liberasurecode_rs_vand' - Native, software-only Erasure Coding implementation that supports a Reed-Solomon backend
- 'Jerasure' - Erasure Coding library that supports Reed-Solomon, Cauchy backends [1]
- 'ISA-L' - Intel Storage Acceleration Library - SIMD accelerated Erasure Coding backends [2]
- 'SHSS' - NTT Lab Japan's hybrid Erasure Coding backend [4]
- 'Flat XOR HD' - built-in to liberasurecode, based on [3]
- 'libphazr' - Phazr.IO's erasure code backend with built-in privacy [5]
- 'NULL' template backend implemented to help future backend writers
-
True 'plugin' architecture - liberasurecode uses Dynamically Loaded (DL) libraries to realize a true 'plugin' architecture. This also allows one to build liberasurecode indepdendent of the Erasure Code backend libraries.
-
Cross-platform - liberasurecode is known to work on Linux (Fedora/Debian flavors), Solaris, BSD and Darwin/Mac OS X.
-
Community support - Developed alongside Erasure Code authority Kevin Greenan, liberasurecode is an actively maintained open-source project with growing community involvement (Openstack Swift, Ceph, PyECLib, NTT Labs).
Active Users
- PyECLib - Python EC library: https://github.com/openstack/pyeclib
- Openstack Swift Object Store - https://wiki.openstack.org/wiki/Swift
Build and Install
Install dependencies -
Debian/Ubuntu hosts:
$ sudo apt-get install build-essential autoconf automake libtool
Fedora/RedHat/CentOS hosts:
$ sudo yum install -y gcc make autoconf automake libtool
To build the liberasurecode repository, perform the following from the top-level directory:
$ ./autogen.sh
$ ./configure
$ make
$ make test
$ sudo make install
References
[1] Jerasure, C library that supports erasure coding in storage applications, http://jerasure.org
[2] Intel(R) Storage Acceleration Library (Open Source Version), https://01.org/intel%C2%AE-storage-acceleration-library-open-source-version
[3] Greenan, Kevin M et al, "Flat XOR-based erasure codes in storage systems", http://www.kaymgee.com/Kevin_Greenan/Publications_files/greenan-msst10.pdf
[4] Kota Tsuyuzaki tsuyuzaki.kota@lab.ntt.co.jp, "NTT SHSS Erasure Coding backend"
[5] Jim Cheung support@phazr.io, "Phazr.IO libphazr erasure code backend with built-in privacy"