Mass Storage Technology and File Organization.

Fuente: ERIC Institute of Education Sciences

Saved in:

Bibliographic Details
Main Author:	Malinconico, S. Michael
Format:	Recurso educativo Open Access
Language:	en
Published:	1980
Subjects:	Computer Science Computer Storage Devices Databases Design Information Retrieval Information Storage Online Systems
Online Access:	Acceder al recurso
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Microcomputers for Information Storage and Retrieval.
by: Kanters, Ben
Published: (1983)

On-Line Remote Catalog Access and Circulation Control System. Part I: Functional Specifications. Part II: User's Manual.
Published: (1969)

British Library Conducts New Technology Research.
by: Graddon, Pamela H. B.
Published: (1982)

Optical Storage and Retrieval of Library Material.
by: Folen, Doris R., et al.
Published: (1993)

Pastime--A System for File Compression.
by: Hultgren, Jan, et al.
Published: (1975)

Microcomputers in Libraries: The Quiet Revolution.
by: Boss, Richard
Published: (1985)

Retrieval of ERIC Files. An On-Line Approach.
by: McIsaac, Donald N., et al.
Published: (1973)

Will Optical Discs Be the End of Online Networks?
by: Epstein, Susan Baerg, et al.
Published: (1987)

A Remote-Terminal Retrospective Search Facility Using a Hybrid of Microform and Computer Storage
by: Irvine, J. J.
Published: (1973)

OCLC-MARC Tape Processing: A Functional Analysis.
by: Miller, Bruce Cummings
Published: (1984)

Researching, Evaluating, and Choosing a Backup Service in the Cloud
by: Hastings, Robin
Published: (2012)

Technology and the Online Catalog.
by: Graham, Peter S.
Published: (1983)

A Personal System for Bibliographic Storage and Retrieval.
by: Chun, Alan
Published: (1987)

Answerman, the Expert Information Specialist: An Expert System for Retrieval of Information from Library Reference Books.
by: Waters, Samuel T.
Published: (1986)

MEDLARS II: A Third Generation Bibliographic Production System
by: Katter, Robert V., et al.
Published: (1975)

Computerizing Internal Information in a Special Library.
by: Gawaldo, Rich, et al.
Published: (1979)

Digital Equipment Corporation's CRDOM Software and Database Publications.
by: Adams, Michael Q.
Published: (1986)

The Computer's Debt to Science.
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Published: (1984)

Problems and Challenges of Downloading for Database Producers.
by: Jansen, Arnold A. J.
Published: (1984)

FORMAT: Canada's Computerized Information System for Audiovisual Materials = FORMAT: Un Systeme National d'Information Informatise pour les Produits Audiovisuels Canadiens.
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Published: (1984)

Database Management Principles of the UCLA Library's Orion System.
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Published: (1987)

Computers and the Language of Bibliographic Descriptions.
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Published: (1981)

A Description of the Text Data Base System TDBS. Stockholm Papers in Library and Information Science.
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PERSIVAL, a System for Personalized Search and Summarization over Multimedia Healthcare Information.
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CD-ROM and Libraries.
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Published: (1985)

CD-ROM Search and Retrieval Software: The Requirements and Realities.
by: Helgerson, Linda W.
Published: (1986)

Prospective Conversion: Data Transfer between Fossil and New Microcomputer Technologies in Libraries.
by: Vratny-Watts, Janet, et al.
Published: (1989)

Time Study of the Digitization of Images in a Microcomputer Environment.
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Published: (1987)

The Power of Imaging.
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Published: (1990)

Magnetic Tape Care, Storage, and Error Recovery.
by: Schenck, Thomas
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Write-Once Laser Disc Technology.
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A Study of the Organization and Search of Bibliographic Holdings Records in On-Line Computer Systems: Phase I. Final Report.
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Criteria for the Evaluation of Text Storage and Retrieval Software.
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An Overview of Electronic Image Information.
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Storage Technology: Present and Future.
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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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ui	"standard"
language	"en"

Session

Key	Value
__Laminas	array:2 [`"_REQUEST_ACCESS_TIME" => 1789307668.758 "_VALID" => array:1 [ "Laminas\Session\Validator\Id" => "261cbe8e590b3e0cebc9b35933e6b0e7" ]`]
SessionState	Laminas\Stdlib\ArrayObject {#938}
FlashMessenger	Laminas\Stdlib\ArrayObject {#1455}
SessionHelper	Laminas\Stdlib\ArrayObject {#1782}

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REDIRECT_STATUS	"200"
VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
HTTPS	"on"
SSL_TLS_SNI	"info.umar.mx"
HTTP_ACCEPT	"/"
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HTTP_ACCEPT_ENCODING	"gzip, br, zstd, deflate"
HTTP_HOST	"info.umar.mx"
PATH	"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/snap/bin"
SERVER_SIGNATURE	"<address>Apache/2.4.66 (Ubuntu) Server at info.umar.mx Port 443</address>\n"
SERVER_SOFTWARE	"Apache/2.4.66 (Ubuntu)"
SERVER_NAME	"info.umar.mx"
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SERVER_PORT	"443"
REMOTE_ADDR	"216.73.216.61"
DOCUMENT_ROOT	"/usr/local/vufind/public"
REQUEST_SCHEME	"https"
CONTEXT_PREFIX	""
CONTEXT_DOCUMENT_ROOT	"/usr/local/vufind/public"
SERVER_ADMIN	"admin@localhost"
SCRIPT_FILENAME	"/usr/local/vufind/public/index.php"
REMOTE_PORT	"32620"
REDIRECT_URL	"/Record/eric_EJ232692/Similar"
GATEWAY_INTERFACE	"CGI/1.1"
SERVER_PROTOCOL	"HTTP/1.1"
REQUEST_METHOD	"GET"
QUERY_STRING	""
REQUEST_URI	"/Record/eric_EJ232692/Similar"
SCRIPT_NAME	"/index.php"
PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1789307668.7471
REQUEST_TIME	1789307668

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Registered Handlers

0. Whoops\Handler\PrettyPageHandler

Environment & details:

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Files empty

Key	Value
VUFIND_SESSION	"261cbe8e590b3e0cebc9b35933e6b0e7"
ui	"standard"
language	"en"

Session

Key	Value
__Laminas	array:2 [`"_REQUEST_ACCESS_TIME" => 1789307668.758 "_VALID" => array:1 [ "Laminas\Session\Validator\Id" => "261cbe8e590b3e0cebc9b35933e6b0e7" ]`]
SessionState	Laminas\Stdlib\ArrayObject {#938}
FlashMessenger	Laminas\Stdlib\ArrayObject {#1455}
SessionHelper	Laminas\Stdlib\ArrayObject {#1782}

Server/Request Data

Key	Value
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REDIRECT_HTTPS	"on"
REDIRECT_SSL_TLS_SNI	"info.umar.mx"
REDIRECT_STATUS	"200"
VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
HTTPS	"on"
SSL_TLS_SNI	"info.umar.mx"
HTTP_ACCEPT	"/"
HTTP_USER_AGENT	"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
HTTP_COOKIE	"VUFIND_SESSION=261cbe8e590b3e0cebc9b35933e6b0e7; ui=standard; language=en"
HTTP_ACCEPT_ENCODING	"gzip, br, zstd, deflate"
HTTP_HOST	"info.umar.mx"
PATH	"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/snap/bin"
SERVER_SIGNATURE	"<address>Apache/2.4.66 (Ubuntu) Server at info.umar.mx Port 443</address>\n"
SERVER_SOFTWARE	"Apache/2.4.66 (Ubuntu)"
SERVER_NAME	"info.umar.mx"
SERVER_ADDR	"200.23.222.19"
SERVER_PORT	"443"
REMOTE_ADDR	"216.73.216.61"
DOCUMENT_ROOT	"/usr/local/vufind/public"
REQUEST_SCHEME	"https"
CONTEXT_PREFIX	""
CONTEXT_DOCUMENT_ROOT	"/usr/local/vufind/public"
SERVER_ADMIN	"admin@localhost"
SCRIPT_FILENAME	"/usr/local/vufind/public/index.php"
REMOTE_PORT	"32620"
REDIRECT_URL	"/Record/eric_EJ232692/Similar"
GATEWAY_INTERFACE	"CGI/1.1"
SERVER_PROTOCOL	"HTTP/1.1"
REQUEST_METHOD	"GET"
QUERY_STRING	""
REQUEST_URI	"/Record/eric_EJ232692/Similar"
SCRIPT_NAME	"/index.php"
PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1789307668.7471
REQUEST_TIME	1789307668

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

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