XOY-Leveldb

作者：谢瑞阳 10225101483 徐翔宇 10225101535

gabor@google.com 6699c7ebe6 Small tweaks and bugfixes for Issue 18 and 19. Slight tweak to the no-overlap optimization: only push to level 2 to reduce the amount of wasted space when the same small key range is being repeatedly overwritten. Fix for Issue 18: Avoid failure on Windows by avoiding deletion of lock file until the end of DestroyDB(). Fix for Issue 19: Disregard sequence numbers when checking for overlap in sstable ranges. This fixes issue 19: when writing the same key over and over again, we would generate a sequence of sstables that were never merged together since their sequence numbers were disjoint. Don't ignore map/unmap error checks. Miscellaneous fixes for small problems Sanjay found while diagnosing issue/9 and issue/16 (corruption_testr failures). - log::Reader reports the record type when it finds an unexpected type. - log::Reader no longer reports an error when it encounters an expected zero record regardless of the setting of the "checksum" flag. - Added a missing forward declaration. - Documented a side-effects of larger write buffer sizes (longer recovery time). git-svn-id: https://leveldb.googlecode.com/svn/trunk@37 62dab493-f737-651d-591e-8d6aee1b9529		vor 13 Jahren
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arena.cc	@20776309	vor 14 Jahren
arena.h	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
arena_test.cc	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
cache.cc	Platform detection during build, plus compatibility patches for machines without <cstdatomic>.	vor 14 Jahren
cache_test.cc	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
coding.cc	@20776309	vor 14 Jahren
coding.h	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
coding_test.cc	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
comparator.cc	@20776309	vor 14 Jahren
crc32c.cc	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
crc32c.h	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
crc32c_test.cc	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
env.cc	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
env_chromium.cc	sync with upstream @ 21409451	vor 14 Jahren
env_posix.cc	Small tweaks and bugfixes for Issue 18 and 19.	vor 13 Jahren
env_test.cc	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
hash.cc	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
hash.h	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
histogram.cc	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
histogram.h	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
logging.cc	@20776309	vor 14 Jahren
logging.h	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
mutexlock.h	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
options.cc	@20776309	vor 14 Jahren
random.h	@20776309	vor 14 Jahren
status.cc	sync with upstream @ 21409451	vor 14 Jahren
testharness.cc	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
testharness.h	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
testutil.cc	reverting disastrous MOE commit, returning to r21	vor 14 Jahren
testutil.h	reverting disastrous MOE commit, returning to r21	vor 14 Jahren