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Add "PRAGMA synchronous=EXTRA" which syncs the directory containing the

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rollback journal when the rollback journal is deleted in order to commit a 
transaction in DELETE mode.

FossilOrigin-Name: af92401826f5cf49e62c278f344ab75252a18da2
This commit is contained in:
drh
2016-02-03 19:20:15 +00:00
parent 1b32554b80
commit 6841b1cb3d
7 changed files with 68 additions and 38 deletions
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22
src/pager.c
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@@ -637,6 +637,7 @@ struct Pager {
u8 useJournal; /* Use a rollback journal on this file */
u8 noSync; /* Do not sync the journal if true */
u8 fullSync; /* Do extra syncs of the journal for robustness */
u8 extraSync; /* sync directory after journal delete */
u8 ckptSyncFlags; /* SYNC_NORMAL or SYNC_FULL for checkpoint */
u8 walSyncFlags; /* SYNC_NORMAL or SYNC_FULL for wal writes */
u8 syncFlags; /* SYNC_NORMAL or SYNC_FULL otherwise */
@@ -1997,8 +1998,7 @@ static int pager_end_transaction(Pager *pPager, int hasMaster, int bCommit){
);
sqlite3OsClose(pPager->jfd);
if( bDelete ){
rc = sqlite3OsDelete(pPager->pVfs, pPager->zJournal,
pPager->fullSync && SQLITE_EXTRA_DURABLE);
rc = sqlite3OsDelete(pPager->pVfs, pPager->zJournal, pPager->extraSync);
}
}
}
@@ -3504,9 +3504,15 @@ void sqlite3PagerSetFlags(
unsigned pgFlags /* Various flags */
){
unsigned level = pgFlags & PAGER_SYNCHRONOUS_MASK;
assert( level>=1 && level<=3 );
pPager->noSync = (level==1 || pPager->tempFile) ?1:0;
pPager->fullSync = (level==3 && !pPager->tempFile) ?1:0;
if( pPager->tempFile ){
pPager->noSync = 1;
pPager->fullSync = 0;
pPager->extraSync = 0;
}else{
pPager->noSync = level==PAGER_SYNCHRONOUS_OFF ?1:0;
pPager->fullSync = level>=PAGER_SYNCHRONOUS_FULL ?1:0;
pPager->extraSync = level==PAGER_SYNCHRONOUS_EXTRA ?1:0;
}
if( pPager->noSync ){
pPager->syncFlags = 0;
pPager->ckptSyncFlags = 0;
@@ -4811,11 +4817,17 @@ act_like_temp_file:
pPager->noSync = pPager->tempFile;
if( pPager->noSync ){
assert( pPager->fullSync==0 );
assert( pPager->extraSync==0 );
assert( pPager->syncFlags==0 );
assert( pPager->walSyncFlags==0 );
assert( pPager->ckptSyncFlags==0 );
}else{
pPager->fullSync = 1;
#ifdef SQLITE_EXTRA_DURABLE
pPager->extraSync = 1;
#else
pPager->extraSync = 0;
#endif
pPager->syncFlags = SQLITE_SYNC_NORMAL;
pPager->walSyncFlags = SQLITE_SYNC_NORMAL | WAL_SYNC_TRANSACTIONS;
pPager->ckptSyncFlags = SQLITE_SYNC_NORMAL;