"UDP is a good choice in situations where delayed data is worthless. For example, in a VoIP phone call, there probably isn’t enough time to retransmit a lost packet before its data is due to be played over the loudspeakers. In this case, there’s no point in retransmitting the packet—the application m"
"For data warehouse queries that need to scan over millions of rows, a big bottleneck is the bandwidth for getting data from disk into memory. However, that is not the only bottleneck. Developers of analytical databases also worry about efficiently using the bandwidth from main memory into the CPU ca"
"Sending a packet over a network or making a request to a network service is normally a transient operation that leaves no permanent trace. Although it is possible to record it permanently (using packet capture and logging), we normally don’t think of it that way. Even message brokers that durably wr"
"SSI is fairly new: it was first described in 2008 [40] and is the subject of Michael Cahill's PhD thesis. ... it has the possibility of being fast enough to become the enw default in the future."
"Detecting writes that affect prior reads (the write occurs after the read)."
"In the context of two-phased locking we discussed index-range locks. .. Wee can use a similar technique here, except that SSI don't block other transactions. When a transaction writes to the database, it must look in the indexes for any other transactions that have recently read the affected data. T"
"In practice, isolation is unfortunately not that simple. Serializable isolation has a performance cost, and many databases don’t want to pay that price. It’s therefore common for systems to use weaker levels of isolation, which protect against some concurrency issues, but not all. Those levels of is"
"One thing that document and graph databases have in common is that they typically don't enforce a schema for the data they store, which can make it easier to adapt applications to changing requirements. However, your application most likely still assumes that data has a certain structure; it's just "