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author | Alex Gorrod <alexander.gorrod@mongodb.com> | 2017-08-21 09:26:14 +1000 |
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committer | Alex Gorrod <alexander.gorrod@mongodb.com> | 2017-08-21 09:26:14 +1000 |
commit | 0cfe4dfc2cf371f9e8196cb79414c3432b95b5af (patch) | |
tree | 3ea1dfc60609b4b6c424144f02af5e8045d1fe40 /src/third_party/wiredtiger/src/lsm/lsm_work_unit.c | |
parent | 1cbfc673303260c725ef428eb0f2b6372feb5ec1 (diff) | |
download | mongo-0cfe4dfc2cf371f9e8196cb79414c3432b95b5af.tar.gz |
Import wiredtiger: b055251678e6b4fcc74a1f651432aadbfeecc0e4 from branch mongodb-3.6
ref: 698847557c..b055251678
for: 3.5.12
WT-3328 Enhance docs around when schema operations can get EBUSY
WT-3358 LSM will hang if the manager fails to start
WT-3365 Understand how timestamps interact with LSM chunk switching
WT-3399 Add new checkpoint blocking test case to automated testing
WT-3417 Drain transactions during upgrade/downgrade.
WT-3441 test_timestamp01 doesn't account for a large WT_TIMESTAMP_SIZE
WT-3450 Add verbose option that tracks timestamp state and information
WT-3452 Enhance existing recovery test to exercise timestamp API
WT-3455 Enhance eviction to be aware of stable timestamp
WT-3459 Test WiredTiger with clock shifting
WT-3460 Add support for rollback_to_stable to column store
WT-3465 Optimize performance when timestamp size is 8 bytes
WT-3483 WT_SESSION::checkpoint returning WT_ROLLBACK
WT-3492 ex_all.c not calling transaction_ops
WT-3493 wt_verbose_dump_txn should display timestamp information
WT-3497 Improve logging message when hitting the WT session limits
WT-3498 Incorrect data read after caching overflow items
WT-3499 Checkpoint can miss not yet committed item
WT-3500 New timestamp-abort test is too chatty
WT-3502 Only keep 10 delta updates between full copies
WT-3503 Coverity 1379333: unchecked return value, full-build Friday
WT-3508 timestamp-abort bug in verification phase
WT-3509 __wt_illegal_value doesn't always provide a failure location
WT-3514 WT_SESSION.checkpoint: read timestamp 6373c older than oldest timestamp
WT-3517 WT_SESSION::reset doesn't need to call out EBUSY specially
WT-3521 Unstable updates should not be written by lookaside eviction
Diffstat (limited to 'src/third_party/wiredtiger/src/lsm/lsm_work_unit.c')
-rw-r--r-- | src/third_party/wiredtiger/src/lsm/lsm_work_unit.c | 61 |
1 files changed, 58 insertions, 3 deletions
diff --git a/src/third_party/wiredtiger/src/lsm/lsm_work_unit.c b/src/third_party/wiredtiger/src/lsm/lsm_work_unit.c index 2f21e8acdc3..816eafebe99 100644 --- a/src/third_party/wiredtiger/src/lsm/lsm_work_unit.c +++ b/src/third_party/wiredtiger/src/lsm/lsm_work_unit.c @@ -256,6 +256,63 @@ err: } /* + * __wt_lsm_chunk_visible_all -- + * Setup a timestamp and check visibility for a chunk, can be called + * from multiple threads in parallel + */ +bool +__wt_lsm_chunk_visible_all( + WT_SESSION_IMPL *session, WT_LSM_CHUNK *chunk) +{ + /* Once a chunk has been flushed it's contents must be visible */ + if (F_ISSET(chunk, WT_LSM_CHUNK_ONDISK | WT_LSM_CHUNK_STABLE)) + return (true); + + if (chunk->switch_txn == WT_TXN_NONE || + !__wt_txn_visible_all(session, chunk->switch_txn, NULL)) + return (false); + +#ifdef HAVE_TIMESTAMPS + { + WT_TXN_GLOBAL *txn_global; + + txn_global = &S2C(session)->txn_global; + + /* + * Once all transactions with updates in the chunk are visible all + * timestamps associated with those updates are assigned so setup a + * timestamp for visibility checking. + */ + if (txn_global->has_commit_timestamp || + txn_global->has_pinned_timestamp) { + if (!F_ISSET(chunk, WT_LSM_CHUNK_HAS_TIMESTAMP)) { + __wt_spin_lock(session, &chunk->timestamp_spinlock); + /* Set the timestamp if we won the race */ + if (!F_ISSET(chunk, WT_LSM_CHUNK_HAS_TIMESTAMP)) { + __wt_readlock(session, &txn_global->rwlock); + __wt_timestamp_set(&chunk->switch_timestamp, + &txn_global->commit_timestamp); + __wt_readunlock(session, &txn_global->rwlock); + F_SET(chunk, WT_LSM_CHUNK_HAS_TIMESTAMP); + } + __wt_spin_unlock(session, &chunk->timestamp_spinlock); + } + if (!__wt_txn_visible_all( + session, chunk->switch_txn, &chunk->switch_timestamp)) + return (false); + } else + /* + * If timestamps aren't in use when the chunk becomes visible + * use the zero timestamp for visibility checks. Otherwise + * there could be confusion if timestamps start being used. + */ + F_SET(chunk, WT_LSM_CHUNK_HAS_TIMESTAMP); + } +#endif + return (true); +} + +/* * __wt_lsm_checkpoint_chunk -- * Flush a single LSM chunk to disk. */ @@ -295,14 +352,12 @@ __wt_lsm_checkpoint_chunk(WT_SESSION_IMPL *session, /* Stop if a running transaction needs the chunk. */ WT_RET(__wt_txn_update_oldest( session, WT_TXN_OLDEST_STRICT | WT_TXN_OLDEST_WAIT)); - if (chunk->switch_txn == WT_TXN_NONE || - !__wt_txn_visible_all(session, chunk->switch_txn, NULL)) { + if (!__wt_lsm_chunk_visible_all(session, chunk)) { __wt_verbose(session, WT_VERB_LSM, "LSM worker %s: running transaction, return", chunk->uri); return (0); } - if (!__wt_atomic_cas8(&chunk->flushing, 0, 1)) return (0); flush_set = true; |