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message checksum - tradução para russo
32-BIT HASH ALGORITHM USED TO DETECT ACCIDENTAL DATA CORRUPTION
Adler32; Adler checksum; Adlers checksum; ADLER32; Adler 32
message checksum
контрольная сумма сообщения
message passing
MECHANISM FOR INTERPROCESS COMMUNICATION
Message passing programming; Message Passing; Message-based protocol; Message-passing; Message-based; Message (object-oriented programming); Asynchronous message passing; Synchronous message passing
общая лексика
передача сообщений, обмен сообщениями
один из двух способов организации взаимодействия между параллельными процессами (другой - shared memory)
checksum
![Effect of a typical checksum function (the Unix<code>[[cksum]]</code> utility)](https://commons.wikimedia.org/wiki/Special:FilePath/Checksum.svg?width=200 "Effect of a typical checksum function (the Unix<code>[[cksum]]</code> utility)")
SMALL-SIZE DATUM COMPUTED FROM AN ARBITRARY BLOCK OF DIGITAL DATA FOR THE PURPOSE OF DETECTING ERRORS
Check sum; Check-sum; Checksums; Integrity check value; Checksun; ICV - Integrity Check Value; Checksum algorithm; Header checksum; Modular sum; Fuzzy checksum; Checksum function
контрольная сумма - altered checksum
- authentication checksum
- bad checksum
- cryptographic checksum
- data checksum
- key checksum
- message checksum
- message integrity checksum
- tamper-proof checksum
- authentication checksum
- bad checksum
- cryptographic checksum
- data checksum
- key checksum
- message checksum
- message integrity checksum
- tamper-proof checksum
Definição
message passing
One of the two techniques for communicating between parallel
processes (the other being shared memory).
A common use of message passing is for communication in a
parallel computer. A process running on one processor may
send a message to a process running on the same processor or
another. The actual transmission of the message is usually
handled by the run-time support of the language in which the
processes are written, or by the operating system.
Message passing scales better than shared memory, which is
generally used in computers with relatively few processors.
This is because the total communications bandwidth usually
increases with the number of processors.
A message passing system provides primitives for sending and
receiving messages. These primitives may by either
synchronous or asynchronous or both. A synchronous send
will not complete (will not allow the sender to proceed) until
the receiving process has received the message. This allows
the sender to know whether the message was received
successfully or not (like when you speak to someone on the
telephone). An asynchronous send simply queues the message
for transmission without waiting for it to be received (like
posting a letter). A synchronous receive primitive will wait
until there is a message to read whereas an asynchronous
receive will return immediately, either with a message or to
say that no message has arrived.
Messages may be sent to a named process or to a named
mailbox which may be readable by one or many processes.
Transmission involves determining the location of the
recipient and then choosing a route to reach that location.
The message may be transmitted in one go or may be split into
packets which are transmitted independently (e.g. using
wormhole routing) and reassembled at the receiver. The
message passing system must ensure that sufficient memory is
available to buffer the message at its destination and at
intermediate nodes.
Messages may be typed or untyped at the programming language
level. They may have a priority, allowing the receiver to
read the highest priority messages first.
Some message passing computers are the {MIT J-Machine
(http://ai.mit.edu/projects/cva/cva_j_machine.html) }, the
{Illinois Concert Project
(http://www-csag.cs.uiuc.edu/projects/concert.html) } and
transputer-based systems.
Object-oriented programming uses message passing between
objects as a metaphor for procedure call.
(1994-11-11)
Wikipédia
Adler-32
Adler-32 is a checksum algorithm written by Mark Adler in 1995, modifying Fletcher's checksum. Compared to a cyclic redundancy check of the same length, it trades reliability for speed. Adler-32 is more reliable than Fletcher-16, and slightly less reliable than Fletcher-32.
