(mainly increasing subscriptions, publishing related properties)
5.observable re-inheritance OBSERVABELFN related properties and methods (OBSERVABELFN includes observations, changes in value before and after value changes)
Define prototype for observables
var observablefn = {
' equalitycomparer ': valuesareprimitiveandequal,
Peek:function () {return this[observablelatestvalue];},
valuehasmutated:function () {this[' notifysubscribers '] ( Thi
FTP server (note: Path from the FTP root The settings for folder are set to:/ftp, as shown above.
Click OK to create an FTP folder in the snapshot folder and generate a snapshot file in that folder.
The publisher is configured so that the Subscriber is configured below.
Third, backup the database server (subscriber) configuration:
Go to subscriber CNBlogsDB2, create a database Cnblogsdemo with the same name as the publisher, and use the full recovery model.
In replication, select New
directory, as a repository for the snapshot files for the publication, and add everyone's full control rights to the shared directory.
2. Determine the database structure used for publishing at the publisher to be used for subscriptions to the databases and Subscribers, or the subscriber to create a new empty database (without creating a table).
3. Set the Publisher and Subscriber database owners to SA.
4, start the SQL Agent (SQLServerAg
events in JavaScript. This is the pattern we've come across again and again, but the more popular client-side library behavior is fundamentally a mixed broker, providing us with APIs like they are observer patterns. When I first wrote Postal.js, I began to walk into the stage of "intermediary for all things." In the prototypes and constructors I've written, it's not uncommon for distribution and subscription calls to be distributed everywhere. When I benefit from the natural decoupling of this
Overview and Basic concepts**eventbus** is an Android-optimized Publish/subscribe message bus that simplifies communication between components, components, and background threads within an application. such as the request network, when the network returns through the handler or broadcast notification UI, two fragment need to communicate through the listener, these requirements can be achieved through the **eventbus**.As a message bus, there are three main elements:Event: EventsSubscriber: Event
RSS based subscriptions, in the application can complete the preview work. Inboard only supports subscriptions to pictures I like on the dribbble.
In Ember, this is one of the most reviled functions. The subscription function is really powerful, but its performance has never been better, has been in constant crash. If you think about it, you will suddenly find that we want a picture management tool, the s
there are currently two connections.
Publish/Subscribe modeIn addition to providing support for Message Queuing, Redis provides a set of commands to support the Publish/subscribe model. 1 Publish PUBLISH instructions can be used to publish a message, format PUBLISH channel messagesThe return value indicates the number of subscriptions to the message. 2 The subscription SUBSCRIBE instruction is used to receive a message, the format SUBSCRIBE channelY
, without being hindered by interaction. Like what:
Use a specific report server as a front-end server to process all report creation requests, so that other servers are free to process interactive reports.
Use one or more report servers to handle the production of ordered subscriptions or event-driven reports.
General performance Optimization Techniques
Because the report server directory is managed by SQL
Do stand for some time, recently found a lot of blogs have RSS subscription function, before also know that it exists, but did not scrutinize. Today's forum to see the relevant posts, caused by the discussion, so today summed up the advantages of RSS and practice, so that more webmaster understand. It has no direct help to the optimization of the website, but can help the website to promote the ranking indirectly from many aspects. The following separately from the definition of RSS, advantages
Recently a reader asked me about the mechanism for processing subscriptions/unsubscribe in the Thickbook News list, and how to match the actual sending information to all the addressee in the mailing list. The problem is good, there is a fairly easy way, but the first thing I have to say is that I do not have any opportunistic places, because I am very cool----is, I use this method is only because I am lazy. Note that there are a lot of mailing list s
urgent critical (need to respond immediately) business into the calling method, in response to the requirements of the use of Message Queuing, put into the MQ queue, for consumer processing.
(3) Providing services for large data processing architectures
Message Queuing also integrates with the real-time processing architecture to provide performance support for data processing, in the context of big data, through messaging as a consolidation.
4. JAVA Messaging Service--JMS
The Java Messaging Se
();
[OperationContract (IsOneWay = true)]
void Subscribe (string id);
[OperationContract (IsOneWay = true)]
void unsubscribe (string id);
Public interface Isubscribecallback
{
[operationcontract]//(IsOneWay = true)
void Callbackwork ( String workstate);
Service implementation, the comments are simple to explain the effect of the following instance model
Instancecontextmode.single synchronously notifies all subscribed
Tags: src pre SQL Server invalid ora str log tor altOriginal: SQL Server subscription expiration workaroundThe database Distribution Agent is no longer enabled because the distribution database is performing a long transaction that reaches the system's scheduled 72 hours, causing the subscription to expire and the following error is indicated:Error message: This (these) subscriptions have been marked as inactive and must be reinitialized. You need to
Concept See also: https://msdn.microsoft.com/zh-cn/library/ms151170.aspx
Push subscriptions
changes can be pushed to subscribers on demand, continuously, or on a schedule. The Distribution Agent or Merge Agent runs at the Distributor.
release requires data to be moved approximately in real time.
High processor overhead on the distributor does not affect performance.
Concept See also: https://msdn.microsoft.com/zh-cn/library/ms151170.aspx
Push subscriptions
changes can be pushed to subscribers on demand, continuously, or on a schedule. The Distribution Agent or Merge Agent runs at the Distributor.
Typically, data is synchronized continuously or in accordance with a schedule that is frequently repeated.
Publishing requires data to be moved approximately in r
Requires a minimum lag time. The
Data is not partitioned between subscribers.
Usually does not conflict, but if it does, it is bound to be detected.
For more information, see Peer Transactional replication.
Transactional replication with update subscriptions
There are a few subscribers.
Replicated data is typically read-only at the Subscriber.
Label: Sql2008 R2 using announcements and subscriptions to synchronize data Because there are a lot of pictures in this article no picture details can go to download page http://download.csdn.net/download/yefighter/7603741 1: Advertisement server: publisher sql2008 R2 iis7.5 Windows Server Please log in to the server do not connect remotely with SQL Server You must turn on the SQL Server Agent service and boot yourself actively Right-click Proper
for news sources will be relatively large, so a good WIN8 news subscription software is also very popular. Here we recommend the Fresh Fruit network, this is in the mobile platform of the rise of the application of the aggregation has also launched a Win8 version.
The new fruit network includes nearly 9,000 mainstream newspapers, magazines, news, information websites and millions of RSS feeds, users can subscribe to their own interest in one-stop subscription like information, through the PC,
design space has been much more tolerant, but still need to be in a very short period of time to pass information. A successful advertising creative can tell a complete story, and the visual information complement each other.
RSS Feeds
Streamlined messaging is not limited to visual media. Simple and portable, really simple design to go beyond any unnecessary width, height, font, color, and browser compatibility requirements. Subscriptions do not
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