Method tryRecover

cachelib/interface/components/FlashCacheComponent.cpp:607–631

      coroToFiberLatency_(std::make_unique<util::PercentileStats>()) {}

void FlashCacheComponent::tryRecover() {
  if (persistenceConfig_.recover()) {
    bool recovered = false;
    try {
      auto metadataSize = persistenceConfig_.metadataSize();
      auto rr = navy::createMetadataRecordReader(*device_, metadataSize);
      XDCHECK(rr) << "failed to create metadata reader";
      if (!rr->isEnd() && cache_->recover(*rr)) {
        // If recovery is successful, invalidate the metadata
        auto rw = createMetadataRecordWriter(*device_, metadataSize);
        XDCHECK(rw) << "failed to create metadata writer";
        recovered = rw->invalidate();
      }
    } catch (const std::exception& e) {
      XLOG(WARN) << "Exception while recovering flash cache: " << e.what();
      recovered = false;
    }

    if (!recovered) {
      cache_->reset();
      XLOG(WARN) << "Failed to recover flash cache from device, creating a "
                    "new empty cache";
    }
  }
}

bool FlashCacheComponent::writeBackImpl(CacheItem& item, bool allowReplace) {
  auto& fccItem = static_cast<FlashCacheItem&>(item);