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SpaceX completes first half of its weekend doubleheader

The company's successes are starting to stack up for the year 2017.

Rick Perry says carbon dioxide is not a primary driver of...

Perry: “Most likely the primary control knob is the ocean waters and this environment.”

Atlantic faces the rare prospect of two active tropical storms in...

Two active tropical storms at the same time in June? Happened just three times.

Thin ice: Vanishing ice only exacerbates a bad, climate change-fueled situation

How's the Earthrsquo;s ice system changing? Look to the active cryosphere.

Giant methane burps left scars at the bottom of the Barents...

Methane is bubbling up today, how did the scars end up on the ocean floor?

Stepping on Neil Armstrong: Ars visits the Navy’s newest research vessel

We've got film from the US' latest generation of mobile research stations.

As hurricane season begins, NOAA told to slow its transition to...

NOAA could become a second- or third-tier weather forecasting enterprise.

SpaceX set to join rare company by re-flying an orbital spacecraft

Only two spacecraft, besides the space shuttle, have flown into orbit more than once.

How Cosmos DB ensures data consistency in the global cloud

Cloud computing isnrsquo;t like working on-premises.
Instead of limiting code to one or maybe two datacenters, wersquo;re designing systems that span not just continents but the entire world.And thatrsquo;s where we start to get issues.

Even using fiber connections, the latency of crossing the Atlantic Ocean is around 60ms, though in practice delays are around 75ms.

The Pacific is wider, so latency through trans-Pacific fiber is around 100ms.[ NoSQL grudge match: MongoDB and Couchbase Server go nose to nose. | Keep up with hot topics in programming with InfoWorldrsquo;s Application Development newsletter. ]Delays add up, and they make it hard to ensure that distributed databases are in sync.

That makes it harder still to be sure that a query in the U.K. will return the same result as one in the U.S. Yes, most replication strategies mean that eventually the two will have the same content, but therersquo;s a big question over just when that will happen.
If the connections are busy, or there a lot of database writes, data can easily get delayed.To read this article in full or to leave a comment, please click here

New sea level estimates show strong, recent acceleration

New approach to handling pre-satellite data shows slower rise in the past.

Japan, China have extracted methane hydrate from the seafloor

Gas hydrates difficult to extract but estimated abundance makes mining attractive.

River channels on three worlds reveal a history of shifting landscapes

Earth, Mars, and Titan all have channels, but different geologic pasts.