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Serializability of a schedule means equivalence ( in the resulting database values ) to some serial schedule with the same transactions ( i. e., in which transactions are sequential with no overlap in time, and thus completely isolated from each other: No concurrent access by any two transactions to the same data is possible ).
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Serializability and schedule
The transaction-related mechanisms typically constrain the database data access operations ' timing ( transaction schedules ) to certain orders characterized as the Serializability and Recoverabiliry schedule properties.
The transaction-related mechanisms typically constrain the database data access operations ' timing ( transaction schedules ) to certain orders characterized as the Serializability and Recoverability schedule properties.
Achieving the Serializability property of a distributed system's schedule ( see Distributed serializability and Global serializability ( Modular serializability )) effectively poses special challenges typically not met by most of the regular serializability mechanisms, originally designed to operate locally.
Serializability and database
Serializability is considered the highest level of isolation among database transactions, and the major correctness criterion for concurrent transactions.
Unlike Serializability, Recoverability cannot be compromised, relaxed at any case, since any relaxation results in quick database integrity violation upon aborts.
Unlike Serializability, Distributed recoverability and Distributed strictness can be achieved efficiently in a straightforward way, similarly to the way Distributed CO is achieved: In each database system they have to be applied locally, and employ a vote ordering strategy for the Two-phase commit protocol ( 2PC ; Raz 1992, page 307 ).
Serializability and with
For correctness, a common major goal of most concurrency control mechanisms is generating schedules with the Serializability property.
Serializability and .
# Serialization graph checking ( also called Serializability, or Conflict, or Precedence graph checking )-Checking for cycles in the schedule's graph and breaking them by aborts.
*< cite id = Raz92 > Yoav Raz ( 1992 ): " The Principle of Commitment Ordering, or Guaranteeing Serializability in a Heterogeneous Environment of Multiple Autonomous Resource Managers Using Atomic Commitment.
schedule and means
If the wedding party lasted late, and the travel schedule means there are only a few hours before resuming the trip or making an early start, the husband may forestall tensions and uncertainties by confiding to his bride that lying in each other's arms will be bliss enough for these few hours.
The main use of the plate appearance statistic is in determining a player's eligibility for leadership in some offensive statistical categories, notably batting average ; currently, a player must have 3. 1 PAs per game scheduled to qualify for the batting title ( for the 162-game schedule, that means 502 PAs ).
This means that an individual firm's demand curve is downward sloping, in contrast to perfect competition, which has a perfectly elastic demand schedule.
The term was used in the legal description of the electoral districts of Canada West, which were grandfathered, by means of a schedule to the new constitution, as the electoral districts for the first elections to the new Canadian House of Commons, immediately following Confederation.
Recoverability ( from abort ) means that no committed transaction in a schedule has read data written by an aborted transaction.
That means a season with a maximum 125 game schedule can be created.
Time-order between two operations can be represented by an ordered pair of these operations ( e. g., the existence of a pair ( OP1, OP2 ) means that OP1 is always before OP2 ), and a schedule in the general case is a set of such ordered pairs.
Such a set, a schedule, is a partial order which can be represented by an acyclic directed graph ( or directed acyclic graph, DAG ) with operations as nodes and time-order as a directed edge ( no cycles are allowed since a cycle means that a first ( any ) operation on a cycle can be both before and after ( any ) another second operation on the cycle, which contradicts our perception of Time ).
Norris, Lawrence and a guest host each host a four-hour program on weekdays ; because the programming schedule means that Norris ' morning program is airing as early as 5 a. m. in western time zones, his program is then repeated in the evenings.
Hunt enjoys the solitude of living on her own and finds that being single means she has encounters and experiences that she wouldn't have if she were part of a couple, where others might choose not to intrude and where she would have to coordinate her schedule with another.
Professional golf tours are the means by which otherwise unconnected professional golf tournaments are organised into a regular schedule.
These histories can be controlled by a number of means including such techniques as using an angle of attack command history or an altitude / downrange schedule that the missile must follow.
On account of certain escheats we command you that you inquire by all the means in your power how much land and rents, goods and chattels, whom and in whom, and of what value they which those persons of Cornwall and England have, whose names we send in a schedule enclosed ......"
Mepa's failure to schedule the fountain as a grade 1 protected structure in effect means that this relocation is being simply undertaken to make way for parking space, carnival parades or both.
Canyon Crest follows a 4x4 class schedule instead of a traditional semester schedule, which means that students can complete eight classes in a year ( four in the fall term and four in the spring term ), rather than six year-long courses.
The lunar influence on the schedule means that the events happen on a different date each year, rather than set calendar dates.
This probably means that it has a cyclic key schedule.
A flexible schedule means that rather than having students come to the library for instruction at a fixed time every week, the classroom teacher schedules library time when the expertise of the school librarian, library and information skills, or materials are needed as part of a learning experience.
A daily schedule is usually ordered chronologically, which means the first employees working that day are listed at the top, followed by the employee who comes in next, et cetera.
These histories can be controlled by a number of means including such techniques as using an angle of attack command history or an altitude / downrange schedule that the missile must follow.
This means it will not compensate for a disrupted schedule due to live sporting events or news bulletins, but many video recorders with these systems also incorporate Programme Delivery Control ( PDC ) and will use that to alter times if possible.
schedule and resulting
In 1935, he began another project, Bezhin Meadow, but it appears the film was afflicted with many of the same problems as Que Viva Mexico — Eisenstein unilaterally decided to film two versions of the scenario, one for adult viewers and one for children ; failed to define a clear shooting schedule ; and shot film prodigiously, resulting in cost overruns and missed deadlines.
Following the 2011 season, Major League Baseball announced its plan to move the Houston Astros from the NL Central to the AL West for the 2013 season, resulting in both leagues having three divisions of five teams each and allowing all teams to have a more balanced schedule.
CO is also the name of the resulting schedule property: A schedule has the CO property if the chronological order of its transactions ' commit events is compatible with the respective transactions ' precedence ( partial ) order.
Thus, the importance of the general Two-phase locking ( 2PL ) is historic only, while Strong strict two-phase locking ( SS2PL ) is practically the important mechanism and resulting schedule property.
Disney had wanted to rent equipment from Industrial Light and Magic, but, when the price was too high and the timing of getting the equipment didn't match Disney's production schedule, they had their engineering department build their own equipment, resulting in the development of Disney's A. C. E. S.
Its success in the USA was partly due to its schedule: the 12-hour duration was split into eight episodes broadcast on consecutive nights, resulting in a finale with a 71 percent share of the audience and 130 million viewers, which at the time was the highest rated TV program of all time.
According to WHYS host Ros Atkins, a " significant number of listeners the ' tone ' and ' production '" of the show, resulting after three years to the removal of the show from OPB's schedule.
The latest criticisms came when Pink launched their reality program The Farm, which sometimes occupied up to ten hours of their schedule, thus resulting in the absence of previous successful shows, films and imported non-soap TV series ( which were removed from unpopular late night airtime and transferred to cable only channel Pink Family ).
The full cast appeared in both films, with the exception of Borgnine and Ballantine in the latter film ; Borgnine was unavailable due to schedule conflicts resulting from the filming of The Flight of the Phoenix ; it is not known why Ballantine was absent.
However, these games are susceptible to backfiring, resulting in damage in poll position and public perception, especially if the higher ranked team loses, although the mere act of scheduling a weak opponent is harmful to a team's overall strength of schedule itself.
The schedule was grueling, but the resulting media blitz resulted in a large and loyal fan base for both programs.
By constantly monitoring risks these can be successfully mitigated resulting in a cost and schedule savings with a positive impact on the project.
The repair was completed ahead of schedule and the bridge was reopened a day before the original estimate, resulting in only minimal impact to traffic.
In the 2009-2010 school year, the E lunch period was removed, resulting in changes to the rest of the schedule.
There was a brief period where the show was taken off the schedule to accommodate new shows for mid-season, resulting in three episodes that were never broadcast.
Unfortunately, stakeholders often have a vague idea of what the functionality should be, and tend to add a lot of unnecessary features, resulting in schedule delays and cost overruns.
Electronic Arts, who had acquired Westwood Studios in 1998 and published Tiberian Sun, and had no direct part in its development, pushed for Tiberian Sun's release ahead of schedule, resulting in a number of engine and gameplay features being omitted from the game, some of which were later included in Firestorm expansion pack.
The Argentine Primera División league is made up of twenty teams, and each Apertura or Clausura championship is organized in a single round robin schedule, resulting in a total of nineteen rounds per championship and ten matches per round.
Despite a heavy touring schedule — resulting from the band being an in-demand fixture on the live concert circuit — The Byrds were eager to release another studio album as soon as possible.
Clumping can be caused by heavy usage on any particular vehicle, resulting in it falling behind schedule.
Capability Maturity Model was created at the Software Engineering Institute of Carnegie Mellon University, and is a process improvement approach that provides organizations with the essential elements of continuous process improvement resulting in a reduced SDLC, improved ability to meet the cost and schedule targets, building products of high quality.
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