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1. Verfasser:	Ismael Leonardo Vera Puerto
Format:	Artículo científico
Sprache:	es
Veröffentlicht:	Universidad Militar Nueva Granada 2016
Schlagworte:	Ingeniería Oracle MongoDB rendimiento Bases de datos bases de datos NoSQL
Online-Zugang:	https://www.redalyc.org/articulo.oa?id=91145342001 https://www.redalyc.org/journal/911/91145342001/ https://www.redalyc.org/journal/911/91145342001/html/ https://www.redalyc.org/journal/911/91145342001/91145342001.epub https://www.redalyc.org/journal/911/91145342001/movil
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EVALUACIÓN DE MATERIALES FILTRANTES PARA EL REÚSO EN AGRICULTURA DE AGUAS RESIDUALES TRATADAS PROVENIENTES DE ZONAS ÁRIDAS Ismael Leonardo Vera Puerto Mauricio Rojas Arredondo Wladimir Chávez Yavara Bernardo Tomás Arriaza Torres Ingeniería Oracle MongoDB rendimiento Bases de datos bases de datos NoSQL La creciente y enorme cantidad de datos, del orden de exabytes, generados por las aplicaciones empresariales actuales han originado conjuntos masivos de estos. Los sistemas de gestión de bases de datos (SGBD) NoSQL han surgido como una alternativa a los SGBD relacionales para la gestión de estos conjuntos. Entre los principales SGBD NoSQL está MongoDB. En este artículo se compara el rendimiento entre MongoDB y Oracle (uno de los principales SGBD que soporta bases de datos relacionales). La comparación se basa en las operaciones de inserción, consulta, actualización y borrado (CRUD, por sus siglas en inglés). Aunque se requieren experimentos más exhaustivos y muchos otros tipos de pruebas, los resultados ofrecen un punto de partida para el análisis de rendimiento en estos SGBD. 2016 artículo científico 0124-8170 https://www.redalyc.org/articulo.oa?id=91145342001 https://www.redalyc.org/journal/911/91145342001/ https://www.redalyc.org/journal/911/91145342001/html/ https://www.redalyc.org/journal/911/91145342001/91145342001.epub https://www.redalyc.org/journal/911/91145342001/movil es http://www.redalyc.org/revista.oa?id=911 Ciencia e Ingeniería Neogranadina application/pdf Universidad Militar Nueva Granada Ciencia e Ingeniería Neogranadina (Colombia) Num.1 Vol.26

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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Registered Handlers

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Environment & details:

Environment & details: