Questions tagged [data-synchronization]

Data synchronization is the process of establishing consistency among data from a source to a target data storage and vice versa and the continuous harmonization of the data over time.

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How to Sync iPhone Core Data with web server, and then push to other devices? [closed]

I have been working on a method to sync core data stored in an iPhone application between multiple devices, such as an iPad or a Mac. There are not many (if any at all) sync frameworks for use with ...
Jason's user avatar
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253 votes
7 answers
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Client-server synchronization pattern / algorithm?

I have a feeling that there must be client-server synchronization patterns out there. But i totally failed to google up one. Situation is quite simple - server is the central node, that multiple ...
tm_lv's user avatar
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153 votes
2 answers
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Best way to synchronize local HTML5 DB (WebSQL Storage, SQLite) with a server (2 way sync) [closed]

I am developing a mobile web application (for iPhone & Android) with a local database (using html5 webstorage) so my app is still usable when the user is offline. This is working perfectly, but I ...
Samuel's user avatar
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89 votes
6 answers
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Synchronizing client-server databases

I'm looking for some general strategies for synchronizing data on a central server with client applications that are not always online. In my particular case, I have an android phone application with ...
Scott Saunders's user avatar
71 votes
5 answers
89k views

What is progress and bounded waiting in critical section?

I was reading Critical Section Problem from Operating System Concepts by Peter B. Galvin. According to it 1) Progress is : If no process is executing in its critical section and some processes wish ...
Navneet Srivastava's user avatar
58 votes
9 answers
15k views

Offline / Online Data Synchronization Design (Javascript) [closed]

I'm currently in the process of writing an offline webapp using all the html5 goodies for offline support. However I'm starting now to think about writing the sync module that will ensure that any ...
gatapia's user avatar
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40 votes
4 answers
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Strategy for Offline/Online data synchronization

My requirement is I have server J2EE web application and client J2EE web application. Sometimes client can go offline. When client comes online he should be able to synchronize changes to and fro. ...
Adisesha's user avatar
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29 votes
5 answers
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iPhone offline application with synchronization

I'm looking into building an application which works just as well offline as it does online. Since the application cannot communicate with the server while in offline, there is some level of ...
Coocoo4Cocoa's user avatar
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25 votes
5 answers
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How to sync data between different devices

I am planing to implement an app and I have come to a point where I don't know what is the best approach. Scenario: I have an app where I am making a todo list and I am adding 3 items. I use my ...
Alin's user avatar
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21 votes
4 answers
9k views

Keeping distributed databases synchronized in a unstable network

I'm facing the following challenge: I have a bunch of databases in different geographical locations where the network may fail a lot (I'm using cellular network). I need to keep all the databases ...
jassuncao's user avatar
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20 votes
3 answers
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django database synchronization for an offline usage

I have one master django sever where the data are stored (mysql database). Online : I would like many users to have a copy from this database synchronized (only delta's must be copied) on their ...
Eric's user avatar
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19 votes
2 answers
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android sqlite bidirectional synchronization sqlite

I need to sync my Android SQLite DB with my cloud-server DB, and doing it in a bi-directional way in a multiuser environment. I have found and introduction to the solution here but I would like to ...
Juanin's user avatar
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18 votes
9 answers
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javascript library for client side storage with server side sync [closed]

I'm looking for a javascript library that will let me store data in a client side database and in the back ground automatically sync the database back to the server's database preferable something ...
msaspence's user avatar
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18 votes
5 answers
9k views

Best practice for on/off line data synchronization using AngularJS and Symfony 2

I'm building a relatively complex and data heavy web application in AngularJS. I'm planning to use php as a RESTful backend (with symfony2 and FOSRESTbundle). I have spent weeks looking around for ...
Kriss's user avatar
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17 votes
4 answers
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What is a good solution to synchronize data between iOS apps? [closed]

I am developing an application, whose data management is realized through Core Data, and I am studying how to implement a feature to synchronize data between two different devices (even between ...
marzapower's user avatar
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16 votes
1 answer
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SQL MIN_ACTIVE_ROWVERSION() value does not change for a long while

We're troubleshooting a sort of Sync Framework between two SQL Server databases, in separate servers (both SQL Server 2008 Enterprise 64 bits SP2 - 10.0.4000.0), through linked server connections, and ...
luiggig's user avatar
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14 votes
4 answers
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Design: How to inform controllers about data modification across application

In a big system mvc-based there are views responsible for editing data and views that display that data. Example: UserManagementView and UserSelectionView. Each subsystem should know whether it ...
Odys's user avatar
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13 votes
2 answers
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Can you sync CoreData with iCloud?

does anyone know if and how you can sync CoreData apps with iCloud? If I understand the Apple iCould instructions right you can not sync CoreData, can you?
cocoafan's user avatar
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12 votes
1 answer
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Checking for multiple asynchronous responses from Alamofire and Swift

I am writing an application that depends on data from various sites/service, and involves performing calculations based on data from these different sources to produce an end product. I have written ...
jonhurlock's user avatar
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12 votes
3 answers
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How to implement a Thread Safe HashTable (PhoneBook) Data Structure in Swift?

I am trying to implement a Thread-Safe PhoneBook object. The phone book should be able to add a person, and look up a person based on their name and phoneNumber. From an implementation perspective ...
AyBayBay's user avatar
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12 votes
2 answers
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Are there best practices/patterns for synchronizing local and remote data in SPA (html5 single page applications)?

I'm writing a simple "todo - helloworld" with jqueryMobile + knockout + breeze + WebAPI to learn about SPAs (Single Page Application) in a mobile context (unreliable internet connection) To enable ...
frenchfaso's user avatar
12 votes
2 answers
3k views

Architecture for data layer that uses both localStorage and a REST remote server

Anybody has any ideas or references on how to implement a data persistence layer that uses both a localStorage and a REST remote storage: The data of a certain client is stored with localStorage (...
Panagiotis Panagi's user avatar
11 votes
4 answers
4k views

Which is the best way to bi-directionally synchronize dynamic data in real time using mysql

Here is the scenario. 2 web servers in two separate locations having two mysql databases with identical tables. The data within the tables is also expected to be identical in real time. Here is the ...
Steve Obbayi's user avatar
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9 votes
3 answers
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Cordova auto update application folder

I have an offline application cordova, composed of simple html and pictures, all inserted in a sub folder (android_asset/www/app). I would like to add a second online application (android_asset/www/...
Neji's user avatar
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9 votes
3 answers
486 views

Software-design & architecture: How to sync data from a directory-tree with a database

I´m twisting my head now for a while and don´t get to a final solution. So I hope I might find some exchange or help on how to solve this issue here on an architectural level. I´m currently facing ...
digital-h's user avatar
  • 311
8 votes
3 answers
5k views

What is the easiest way to keep a database synchronized between multiple iOS and Android devices?

For our mobile application, we were hoping to use the Realm.io database, but we need to be able to synchronize multiple devices so they always have the same information. The database could get to be a ...
David's user avatar
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8 votes
2 answers
7k views

Background data sync for mobile apps

We're building an API and mobile app on top of a database that has a few hundred thousand records in the main table of interest. Our mobile developer is pushing hard about pre-loading the app with ...
quickshiftin's user avatar
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8 votes
2 answers
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TPL DataFlow vs BlockingCollection

I understand that a BlockingCollection is best suited for a consumer/producer pattern. However, when do I use a ActionBlock from the TPL DataFlow library? My initial understanding is for IO ...
poy's user avatar
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8 votes
7 answers
12k views

database synchronization - MS Access

I have an issue at the moment where multiple (same schema) access 2003 databases are used on laptops. I need to find an automated way to synchronize the data into a central access database. Data on ...
Russell's user avatar
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8 votes
3 answers
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How to synchronize data between multiple clients on Node.js Server

The following diagram is a basic representation of a web application I am creating. The basic operation of the application is as follows: Client sends request for data from node.js server Server ...
Josh's user avatar
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8 votes
2 answers
365 views

Getting Source only and mismatch data with tablediff utility

I'm using tablediff utility to transfert data from serval databases sources to a destination database and I get a result having all the differences between the source and destination databases with ...
Billydan's user avatar
  • 395
8 votes
2 answers
3k views

AVD emulator has no option to Sync with Google Calendar

My app has functionality to add events to the calendar but in order to achieve this Android's calendar app needs to have calendars. In order to add calendars you have to add a Google account. So I ...
pt123's user avatar
  • 2,156
8 votes
2 answers
481 views

Rails: How to manage associations between two tables syncing data?

I will be having two Rails applications, one is full fledged and other one a stripped down one. Both of these applications have their own database and they will communicate to each other using APIs. ...
Rajkaran Mishra's user avatar
7 votes
4 answers
19k views

Difference between data replication and synchronization?

I'm having trouble finding the differences between data synchronization and replication. From what I can tell, replication is making all data between 2 databases the same. Synchronization doesn't ...
user1876202's user avatar
7 votes
2 answers
5k views

Syncing objects between two disparate systems, best approach?

I am working on syncing two business objects between an iPhone and a Web site using an XML-based payload and would love to solicit some ideas for an optimal routine. The nature of this question is ...
hyuan's user avatar
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7 votes
1 answer
2k views

Firebase synchronisation of locally-modified data: handling errors & global status

I have two related questions regarding the Firebase web platform's synchronisation of locally-modified data to the server: Every client sharing a Firebase database maintains its own internal ...
TachyonVortex's user avatar
7 votes
4 answers
5k views

Make rsync exclude all directories that contain a file with a specific name

I would like rsync to exclude all directories that contain a file with a specific name, say ".rsync-exclude", independent of the contents of the ".rsync-exclude" file. If the file ".rsync-exclude" ...
klaus se's user avatar
  • 2,661
7 votes
1 answer
5k views

One-way Database Synchronization

There is frequently the need to synchronize data from master tables in one database to clone tables in other databases, often on other servers. For example, consider the case where a backend system ...
Jason Kresowaty's user avatar
7 votes
2 answers
9k views

Data synchronization between MySQL and MongoDB

I am looking for a way to synchronize my data from MySQL to MongoDB. I do not want just to replicate my data, I want them to be permanently synchronized. Does anyone know if Tungsten Replicator would ...
Christophe's user avatar
7 votes
3 answers
640 views

Best strategy for synching data in iPhone app

I am working on a regular iPhone app which pulls data from a server (XML, JSON, etc...), and I'm wondering what is the best way to implement synching data. Criteria are speed (less network data ...
iamj4de's user avatar
  • 780
7 votes
1 answer
2k views

cloud based synchronization architecture

I am thinking of building a cloud base synch solution (something like Dropbox): What would a robust architecture look like? What technologies would you need to support different platforms like ...
user482393's user avatar
6 votes
1 answer
9k views

How to sync only the changed files from the remote directory using pysftp?

I am using pysftp library's get_r function (https://pysftp.readthedocs.io/en/release_0.2.9/pysftp.html#pysftp.Connection.get_r) to get a local copy of a directory structure from sftp server. Is that ...
Krzysztof Słowiński's user avatar
6 votes
3 answers
12k views

Linux file synchronization between computers

I'm looking for a software which will allow me to synchronize files in specyfic folders between my linux boxes. I have searched a lot of topics and what I've found is Unison. It looks prety good but ...
Wojciech Danilo's user avatar
6 votes
1 answer
4k views

Syncrhonizing 2 database with different schemas

We have a normalized SQL Server 2008 database designed using generic tables. So, instead of having a separate table for each entity (e.g. Products, Orders, OrderItems, etc), we have generic tables (...
Mosh's user avatar
  • 6,004
6 votes
1 answer
876 views

Syncing between two databases

I have an application that also has a web interface, one of the requirements is to be able to work on the application even if there isn't an internet connection available. Is there a need to sync ...
the_drow's user avatar
  • 18.9k
6 votes
3 answers
312 views

What's the best way to do one-way synching from a server-side database to iPhone?

I've got a database on my server which is about 3mb big. I'd like to ship that with my iphone application. The most important thing is that I'd like to promote changes to the database (insert, ...
swalkner's user avatar
  • 16.9k
6 votes
1 answer
9k views

Multiple users for private Docker registry?

I have a private Docker registry running. Any user should be able to push and pull any image. Therefore, right now I am not using any user identification at all. However, a user should not be able ...
Florian Dietz's user avatar
6 votes
0 answers
556 views

Do I benefit from using syncadapter in android?

I have a server that has php and mysql running. There are php scripts that return the data on the server in json format. This data is consumed by my android app. The app synchronizes the data with the ...
Pankaj's user avatar
  • 327
6 votes
3 answers
6k views

Synchronise/update sqlite databases

We've got an android app and an iPhone app (same functionality) that use sqlite for local data storage. The apps initially come with no data, then on the first run they receive data from a remote ...
Aleks G's user avatar
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5 votes
1 answer
4k views

Using Kafka for Data Integration with Updates & Deletes

So a little background - we have a large number of data sources ranging from RDBMS's to S3 files. We would like to synchronize and integrate this data with other various data warehouses, databases, ...
archeezee's user avatar
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