{'fraction_non_alphanumeric': 0.022840827980014276, 'fraction_numerical': 0.0, 'mean_word_length': 5.343891402714932, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Low-power distributed NoSQL database for IoT middleware

The Internet will become to the Internet of Things (IoT). It provides connectivity for everyone and everything that embeds some intelligence in Internet-connected objects to communicate, exchange information, take decisions, invoke actions and provide amazing services. This will bring a new ubiquitous computing and communication era and change people's lives (drastically/entirely). Moreover, the most important component in IoT is database that used for collecting and storing a lot of data from ubiquitous sensing devices. Even though, cloud-based storage solutions are becoming increasingly popular in recent years, it is inconvenient for residential environments because the sensing devices should be connected to the internet for simultaneously sending data to cloud computing. However, this solution has a high cost implication and high power consumption. Therefore, the credit-card sized computer which is fully functional is a good alternative. It is small and inexpensive computer that provides a new opportunity for IoT hardware. As a result, it is possible to use Raspberry Pi as a database server. In this paper, we will explain how to construct a database server for IoT middleware that has data distribution and low-power consumption by using credit-card size computers which have satisfactory performances and affordable price.