Traditional age-ordered associative load and store queues are complex, inefficient, and power-hungry.
The arrival of J Brand's skinny cargo pant -- the "Houlihan" -- a couple of years ago sparked store queues and almost too much excitement.
The queue database stores queue and form definitions, job information, and fail-over information.
At around 3.50pm, about 50 people were let into the store to queue up for the Snapbot vending machine.
The DIF allows to build, store and queue packets of data as well as to control the detectors providing USB and serial link connectivity.
It allows customers to preorder and pay for food and beverages before they get to the store, skipping queues of caffeine-deprived people.
Or as Carl Fysh, Beyoncé's UK publicist, told me over a pint after the show in Glasgow: "My generation remembers the excitement of knowing an album was coming out – you saved your pocket money, you went to the record store, you queued up, you got the album and took it home, but you hadn't heard a thing about it.
Customers at the Gabalfa store began queuing at 18 00 GMT on Thursday to enter the supermarket at midnight.
Jake Lee, 17, from Essex, was the first inside the Regent Street store after queuing since midday on 27 May.
In addition, if the packet arrival rate is faster than the upload rate, the packets will be stored in queue or dropped.
North Laine's Resident is the latterday independent record shop par excellence: good stock, lots of vinyl, stickers on the CDs bearing passionate recommendations from the knowledgeable, friendly and opinionated staff, occasional in-store performances, queues round the block on Record Store Day.
