SQLite4
Check-in [6ced48df30]
Check-in [6ced48df30]
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| Comment: | Fix a race condition between flushing an in-memory tree to disk and opening a read-transaction. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | multi-process |
| Files: | files | file ages | folders |
| SHA1: |
6ced48df303d83a2e993bf070e92614d |
| User & Date: | dan 2012-09-03 11:34:35 |
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2012-09-03
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| 14:50 | Fix a problem with growing the database file in mmap mode. check-in: 1a86aa1c6b user: dan tags: multi-process | |
| 11:34 | Fix a race condition between flushing an in-memory tree to disk and opening a read-transaction. check-in: 6ced48df30 user: dan tags: multi-process | |
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2012-09-02
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| 09:25 | Fix a crash in multi-threaded tests that can occur if a call to lsm_open() fails. check-in: dd2489a645 user: dan tags: multi-process | |
Changes to src/lsm_main.c.
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if( iLevel<0 ) iLevel = LSM_MAX(0, pDb->nTransOpen - 1);
if( iLevel<pDb->nTransOpen ){
if( iLevel==0 ){
/* Commit the transaction to disk. */
if( lsmTreeSize(pDb)>pDb->nTreeLimit ){
bFlush = 1;
rc = lsmFlushToDisk(pDb);
}
if( rc==LSM_OK ) rc = lsmLogCommit(pDb);
if( rc==LSM_OK && pDb->eSafety==LSM_SAFETY_FULL ){
rc = lsmFsSyncLog(pDb->pFS);
}
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> |
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if( iLevel<0 ) iLevel = LSM_MAX(0, pDb->nTransOpen - 1);
if( iLevel<pDb->nTransOpen ){
if( iLevel==0 ){
/* Commit the transaction to disk. */
if( lsmTreeSize(pDb)>pDb->nTreeLimit ){
lsmTreeEndTransaction(pDb, 1);
bFlush = 1;
rc = lsmFlushToDisk(pDb);
}
if( rc==LSM_OK ) rc = lsmLogCommit(pDb);
if( rc==LSM_OK && pDb->eSafety==LSM_SAFETY_FULL ){
rc = lsmFsSyncLog(pDb->pFS);
}
|
Changes to src/lsm_shared.c.
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if( rc==LSM_OK ){
ShmHeader *pShm = pDb->pShmhdr;
i64 iTree = pDb->treehdr.iTreeId;
i64 iSnap = lsmCheckpointId(pDb->aSnapshot, 0);
rc = lsmReadlock(pDb, iSnap, iTree);
if( rc==LSM_OK ){
if( (i64)pShm->hdr1.iTreeId==iTree
&& lsmCheckpointId(pShm->aClient, 0)==iSnap
){
/* Read lock has been successfully obtained. Deserialize the
** checkpoint just loaded. TODO: This will be removed after
** lsm_sorted.c is changed to work directly from the serialized
** version of the snapshot. */
rc = lsmCheckpointDeserialize(pDb, 0, pDb->aSnapshot, &pDb->pClient);
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> |
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if( rc==LSM_OK ){
ShmHeader *pShm = pDb->pShmhdr;
i64 iTree = pDb->treehdr.iTreeId;
i64 iSnap = lsmCheckpointId(pDb->aSnapshot, 0);
rc = lsmReadlock(pDb, iSnap, iTree);
if( rc==LSM_OK ){
if( (i64)pShm->hdr1.iTreeId==iTree
&& pShm->hdr1.iTransId==pDb->treehdr.iTransId
&& lsmCheckpointId(pShm->aClient, 0)==iSnap
){
/* Read lock has been successfully obtained. Deserialize the
** checkpoint just loaded. TODO: This will be removed after
** lsm_sorted.c is changed to work directly from the serialized
** version of the snapshot. */
rc = lsmCheckpointDeserialize(pDb, 0, pDb->aSnapshot, &pDb->pClient);
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