Stasis is a flexible transactional storage library for high-performance applications and system developers. It supports concurrent transactional storage and no-FORCE/STEAL buffer management.
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The region allocator marks freed regions "Condemned" before actually freeing them. Condemned regions are associated with a transaction; before they can be reused / coalesced the transaction that condemned them must complete. The region allocator used "TisActiveTransaction(xid)" to determine whether a given transaction had completed. The problem is that Stasis now reuses transaction id's, and condemned regions were never reclaimed in practice. A transaction fingerprint is a unique identifier (currently transaction id, rec_lsn) that can be used to distinguish transactions that did not execute concurrently. I considered an alternative design based upon end-of-transaction actions. This would have worked as well, but would have been a more invasive change. |
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| benchmarks | ||
| blast | ||
| cmake | ||
| doc | ||
| examples | ||
| lang | ||
| libdfa | ||
| m4 | ||
| pbl | ||
| pobj | ||
| src | ||
| stasis | ||
| test | ||
| utilities | ||
| .cproject | ||
| .cvsignore | ||
| .project | ||
| AUTHORS | ||
| bootstrap | ||
| clean.sh | ||
| CMakeLists.txt | ||
| config.h.cmake | ||
| configure.in.automake | ||
| configure.in.lite | ||
| COPYING | ||
| CTestConfig.cmake | ||
| INSTALL | ||
| Makefile.am | ||
| README | ||
| reconf | ||
| reconf-1.8 | ||
| reconf-1.9 | ||
Stasis is a transactional storage library. Please see the COPYING file for licensing information, and INSTALL for compilation instructions. More information, including papers, a tutorial and API documentation are available at: http://www.cs.berkeley.edu/~sears/stasis/