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This prevents records from being overwritten incorrectly, but allows only one record to be processed at a time, locking out other users who need to edit records at the same time. To allow several users to edit a database table at the same time and also prevent inconsistencies created by unrestricted access, a single record can be locked when ...
A lock value block is associated with each resource. This can be read by any process that has obtained a lock on the resource (other than a null lock) and can be updated by a process that has obtained a protected update or exclusive lock on it. It can be used to hold any information about the resource that the application designer chooses.
A tombstone is a deleted record in a replica of a distributed data store. [1] The tombstone is necessary, as distributed data stores use eventual consistency , where only a subset of nodes where the data is stored must respond before an operation is considered to be successful.
Upon download of an application, a particular extended file attribute ("quarantine flag") can be added to the downloaded file. [10] This attribute is added by the application that downloads the file, such as a web browser or email client, but is not usually added by common BitTorrent client software, such as Transmission, and application developers will need to implement this feature into ...
update: Update the files in a working copy with the latest version from a repository; lock: Lock files in a repository from being changed by other users; add: Mark specified files to be added to repository at next commit; remove: Mark specified files to be removed at next commit (note: keeps cohesive revision history of before and at the remove.)
It was developed by MySQL AB, and enables users to graphically administer MySQL databases and visually design database structures. Adminer – free MySQL front end capable of managing multiple databases, with many CSS skins available. It is a light-weight alternative to phpMyAdmin, distributed under the Apache license (or GPL v2) as a single ...
Percona Server for MySQL is an open source relational database management system (RDBMS). It is a free, fully compatible drop in replacement for Oracle MySQL . The software includes a number of scalability, availability, security and backup features only available in MySQL's commercial Enterprise edition. [ 2 ]
The web server or database management system also varies. LEMP is a version where Apache has been replaced with the more lightweight web server Nginx. [6] A version where MySQL has been replaced by PostgreSQL is called LAPP, or sometimes by keeping the original acronym, LAMP (Linux / Apache / Middleware (Perl, PHP, Python, Ruby) / PostgreSQL). [7]