metadata scrubber

Turn from: http://ctripmysqldba.iteye.com/blog/1938150 (modified)When MySQL is doing DDL operations such as ALTER TABLE, there are times when waiting for table metadata lock is waiting for the scene. Furthermore, once ALTER TABLE TableA's operation is stuck in the waiting for table metadata lock state, any subsequent operations on TABLEA (including read) will not work because they are also in opening The ta

Using the Metadata methodThis requires the use of the Jquery.metadata.js plugin to work, specifying validation rules by defining special properties in the form itemBut I found that the latest Jquery.validate 1.11 has no built-in metadata support, so it needs to be modified Search for $.validator.classrules (element) in the Jquery.validate.js file and add the following line before it:$.valid

Mysql metadata lock (3), mysqlmetadatalock Preface The MDL lock is mainly used to protect the metadata of Mysql internal objects. The MDL mechanism ensures the concurrency of DDL, DML, and SELECT query operations. MySQL Meta Lock (1) and MySQL Meta Lock (2) have already talked about MDL knowledge. This article will supplement MDL, explains how to query congestion and mysqldump to obtain consistent backup. 1

We have introduced the parsing of SQL statements. Before we begin to introduce the implementation of query actions, we need to take a look at simpledb's management of metadata (metadata. Integrity considerations correspondCodeHere we will introduce record and metadata together. The class diagrams of metadata and re

achieves reuse of identical or similar objects through the sharing technology,Logically, each character that appears corresponds to an object, but physically they share the same object.This object can appear in different places of a string. The same character object points to the same instance.FlyweightPool). We can create a metadata object for each character and place it in the metadata pool. If necessary

Under Elasticsearch, a document contains metadata (Metadata), in addition to data. Every time you create a piece of data, it writes to the metadata, and, of course, some of the metadata is set when you create the mapping, and the metadata plays a very big role in Elasticsear

In the project, use unity as the IOC to concatenate the entire project and integrate WCF and ADO. NET Entity Framework, initially showed that unity could not construct the object. After being ruled out, it was found that ADO was used. the following exception occurs when the NET Entity Framework constructs the application: Unable to load the specified metadata resource.Exception information:System. Data. metadataexception was unhandledMessage = "unable

Class and metadata Declaration Translated fromClass and metaclassesOriginal non-nengong The chaotic logic of ten egg and egg Body Objective-C is a class-based object system. every class is an instance of the class; the ISA pointer of the object points to the class to which it belongs. class describes the data of an object: the size of the object, the type of instance variables, and the layout form. class also defines the behavior of the

Create local metadata resource of yum Today, I need install an oracle software for a machine whose OS is Linux. as we all know, installing oracle database software need installing additional packages. in order to install these package easily, I create a local yum resource. as following: [python] We only assume that mount cdrom to media/dev/hdc 3.3G 3.3G 0 100%/media [python] mkdir/yum cp-r/med Ia/*/yum [python] install tool package: [root @ test ~] #

Using the Metadata methodThis requires the use of the Jquery.metadata.js plugin to work, specifying validation rules by defining special properties in the form itemBut I found that the latest Jquery.validate 1.11 has no built-in metadata support, so it needs to be modified Search for $.validator.classrules (element) in the Jquery.validate.js file and add the following line before it:$.valida

Original: Anatomy of SQL Server Nineth Orcamdf can now display metadata through System DMVs (translated)Anatomy of SQL Server Nineth Orcamdf can now display metadata through System DMVs (translated)http://improve.dk/orcamdf-now-exposes-metadata-through-system-dmvs/I sat on a train to Denmark and attended the last leg of the SQL Rally conference in northern Europe

Tags: des style blog http io ar color OS useThe original: Everyone is DBA (II) SQL Server MetadataA set of tables is maintained in SQL Server to store information about all objects, data types, constraints, configuration options, available resources, and so on in SQL Server, known as metadata information (Metadata), which are known as system base tables (systems base Tables). In these underlying tables, a s

2.0 rules and terminology of the Core metadata standard of the Chinese Emy of Sciences scientific database . Rules and terminology Rules 1Dataset identifier (URI) Naming rules The dataset naming rule consists of the following four parts: 1). Character composition: (1) 26 English letters, case-insensitive; (2) ", 5," 10 digits; (3) "-" (a hyphen in English ). 2) For a dataset owner with a registered domain name, use the domain name registration classi

The object-oriented thinking solves the abstract problem well, and generally does not have performance problems. However, in some cases, the number of objects may be too large, resulting in the runtime cost. So how can we avoid a large number of fine-grained objects without affecting the use of object-oriented operations by customer programs? Metadata mode:Use sharing technology to effectively support a large number of fine-grained objects Structure