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Not all flush will write to disk

This commit is contained in:
Chaoguang Lin 2020-12-11 10:33:50 -08:00
parent 0613a149a6
commit 315557f58f
2 changed files with 17 additions and 24 deletions
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37
fdbrpc/AsyncFileCached.actor.cpp
View File

@ -19,7 +19,6 @@
*/
#include "fdbrpc/AsyncFileCached.actor.h"
#include "flow/actorcompiler.h" // This must be the last #include.
//Page caches used in non-simulated environments
Optional<Reference<EvictablePageCache>> pc4k, pc64k;
@ -253,33 +252,23 @@ Future<Void> AsyncFileCached::changeFileSize( int64_t size ) {
});
}
ACTOR static Future<Void> flushActor(AsyncFileCached* self) {
state std::vector<Future<Void>> unflushed;
state int debug_count = self->getFlushable().size();
state int i = 0;
state AFCPage* p;
for (; i < self->getFlushable().size();) {
p = self->getFlushable()[i];
// Wait for rate control if it is set
if (self->getRateControl()) wait(self->getRateControl()->getAllowance(1));
auto f = p->flush();
if (!f.isReady() || f.isError()) unflushed.push_back( f );
ASSERT((i < self->getFlushable().size() && self->getFlushable()[i] == p) != f.isReady());
if (!f.isReady()) i++;
}
ASSERT(self->getFlushable().size() <= debug_count);
wait(waitForAll(unflushed));
return Void();
}
Future<Void> AsyncFileCached::flush() {
++countFileCacheWrites;
++countCacheWrites;
return flushActor(this);
std::vector<Future<Void>> unflushed;
int debug_count = flushable.size();
for(int i=0; i<flushable.size(); ) {
auto p = flushable[i];
auto f = p->flush();
if (!f.isReady() || f.isError()) unflushed.push_back( f );
ASSERT( (i<flushable.size() && flushable[i] == p) != f.isReady() );
if (!f.isReady()) i++;
}
ASSERT( flushable.size() <= debug_count );
return waitForAll(unflushed);
}
Future<Void> AsyncFileCached::quiesce() {

4
fdbrpc/AsyncFileCached.actor.h
View File

@ -512,6 +512,10 @@ struct AFCPage : public EvictablePage, public FastAllocated<AFCPage> {
wait( self->notReading && self->notFlushing );
if (dirty) {
// Wait for rate control if it is set
if (self->owner->getRateControl())
wait(self->owner->getRateControl()->getAllowance(1));
if ( self->pageOffset + self->pageCache->pageSize > self->owner->length ) {
ASSERT(self->pageOffset < self->owner->length);
memset( static_cast<uint8_t *>(self->data) + self->owner->length - self->pageOffset, 0, self->pageCache->pageSize - (self->owner->length - self->pageOffset) );