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Add the --fsync flag to kvtest, and document the --nosync flag.

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FossilOrigin-Name: 7fdc78a672b2ea6187dcb5fdf32f809bb8e4d501e2434f2233edc3bc2e3acc7c
This commit is contained in:
drh
2017-06-02 23:32:17 +00:00
parent a2e71ced79
commit f151890791
3 changed files with 29 additions and 11 deletions
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26
test/kvtest.c
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@ -90,9 +90,11 @@ static const char zHelp[] =
" --cache-size N Database cache size\n"
" --count N Read N blobs\n"
" --desc Read blobs in descending order\n"
" --integrity-check Run 'PRAGMA integrity_check' after test\n"
" --fsync Synchronous file writes\n"
" --integrity-check Run \"PRAGMA integrity_check\" after test\n"
" --max-id N Maximum blob key to use\n"
" --mmap N Mmap as much as N bytes of DBFILE\n"
" --nosync Set \"PRAGMA synchronous=OFF\"\n"
" --jmode MODE Set MODE journal mode prior to starting\n"
" --random Read blobs in a random order\n"
" --start N Start reading with this blob key\n"
@ -541,11 +543,12 @@ static unsigned char *readFile(const char *zName, int *pnByte){
** Overwrite a file with randomness. Do not change the size of the
** file.
*/
static void updateFile(const char *zName, int *pnByte){
static void updateFile(const char *zName, int *pnByte, int doFsync){
FILE *out; /* FILE from which to read content of zName */
sqlite3_int64 sz; /* Size of zName in bytes */
size_t nWritten; /* Number of bytes actually read */
unsigned char *pBuf; /* Content to store on disk */
const char *zMode = "wb"; /* Mode for fopen() */
sz = fileSize(zName);
if( sz<0 ){
@ -558,11 +561,21 @@ static void updateFile(const char *zName, int *pnByte){
fatalError("Cannot allocate %lld bytes\n", sz);
}
sqlite3_randomness((int)sz, pBuf);
out = fopen(zName, "wb");
#if defined(_WIN32)
if( doFsync ) zMode = "wbc";
#endif
out = fopen(zName, zMode);
if( out==0 ){
fatalError("Cannot open \"%s\" for writing\n", zName);
}
nWritten = fwrite(pBuf, 1, (size_t)sz, out);
if( doFsync ){
#if defined(_WIN32)
fflush(out);
#else
fsync(fileno(out));
#endif
}
fclose(out);
if( nWritten!=(size_t)sz ){
fatalError("Wrote only %d of %d bytes to \"%s\"\n",
@ -728,6 +741,7 @@ static int runMain(int argc, char **argv){
int isUpdateTest = 0; /* Do in-place updates rather than reads */
int doIntegrityCk = 0; /* Run PRAGMA integrity_check after the test */
int noSync = 0; /* Disable synchronous mode */
int doFsync = 0; /* Update disk files synchronously */
sqlite3 *db = 0; /* Database connection */
sqlite3_stmt *pStmt = 0; /* Prepared statement for SQL access */
sqlite3_blob *pBlob = 0; /* Handle for incremental Blob I/O */
@ -816,6 +830,10 @@ static int runMain(int argc, char **argv){
noSync = 1;
continue;
}
if( strcmp(z, "-fsync")==0 ){
doFsync = 1;
continue;
}
fatalError("unknown option: \"%s\"", argv[i]);
}
if( eType==PATH_DB ){
@ -884,7 +902,7 @@ static int runMain(int argc, char **argv){
zKey = sqlite3_mprintf("%s/%06d", zDb, iKey);
nData = 0;
if( isUpdateTest ){
updateFile(zKey, &nData);
updateFile(zKey, &nData, doFsync);
}else{
pData = readFile(zKey, &nData);
sqlite3_free(pData);