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Code Issues Releases Activity

tweaks for posix_fallocate

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This commit is contained in:
Eliot Horowitz 2010-04-27 14:02:11 -04:00
parent 241ba14f4d
commit ef6b1e355e
1 changed files with 11 additions and 3 deletions
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14
util/file_allocator.h
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@ -107,12 +107,20 @@ namespace mongo {
}
static void ensureLength( int fd , long size ){
#if defined(_WIN32)
// we don't zero on windows
// TODO : we should to avoid fragmentation
#elif defined(__linux__) && ! defined(__sunos__)
posix_fallocate(fd,0,size);
#else
#if defined(__linux__) && ! defined(__sunos__)
int ret = posix_fallocate(fd,0,size);
if ( ret == 0 )
return;
log() << "posix_fallocate failed: " << errnoWithDescription( ret ) << " falling back" << endl;
#endif
off_t filelen = lseek(fd, 0, SEEK_END);
if ( filelen < size ) {
massert( 10440 , "failure creating new datafile", filelen == 0 );
@ -136,7 +144,7 @@ namespace mongo {
massert( 10443 , errnoWithPrefix("write failed" ), written > 0 );
left -= written;
}
}
}
#endif
}