Questions tagged [data-synchronization]

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Where, physically, to set the wal_level?

I am setting up replication for a table between 2 Postgresql 12 servers. What I have done : Enable wal_level = logical on the Publisher Create Publisher : '''CREATE PUBLICATION TEST_publication2 FOR ...
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Can ankane/pgsync perform bidirectional synchronisation?

Can ankane/pgsync be used to update tables bi-directionally, or is it one-way parent/child mode? We have version 12 of Postgres installed on-premises and in RDS. We want to synchronize two tables, one ...
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Keeping schemas in sync with a database?

I have been asked to work on a database that has a regretful design and cannot be changed so I would ask that we work within these parameters. This is all in SQL Server 2019. I have SQL Server that ...
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Is it a bad idea to have a table of deleted UUID's for synchronisation purposes

I have a webapplication and a corresponding mobile application. User can add on the webapp and live DB is auto updated. App can be used offline and add insert and update into local sql lite. Any ...
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Bidirectional database sync best practices

I'm designing a public-facing tool for clients to maintain some basic info that my company also uses and adjusts internally, and I'm running into some best-practice questions around keeping the public-...
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Best way to synchronize offline data to master when deleting items

I have a application that can work offline as well as the same application via web browser. The web browser is connected to the main DB so always live inserts updates and delete. The application when ...
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How to synchronize eligible data of multiple tables in a database?

The server has a lot of stock data and I want to sync to my local, A: Server; mysql, a total of 600 tables, 50G raw data. B: My computer; mysql, with Navicat 16. The database in server A, stock data ...
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Synchronise a database using another database

We are building an e-commerce marketplace application with MySQL as the database. Multiple vendors can manage their inventory here. Our primary vendor who owns this application wants to synchronize ...
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how to sync one table of AWS RDS to another RDS

I have requirement like need to synchronize one table of data (contain user list) in AWS RDS instance to another RDS Instance. only particular user's table need to synchronize. ex: RDS-1 have schema ...
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2 answers
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Sync databases from different servers [closed]

I have the following setup: One SQL Server on one side, another on the other. The two can't connect, so no possibility to a linked server. It is possible to place the MDFs and LDFs in a shared folder. ...
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Using Cloud and On Premise DB together in an Application

I am developing a textile shop application in .NET Core using the Entity framework. So I am developing it in Azure and using the same application for different shops using Shop ID as the primary key. ...
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1 answer
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Query differences between two tables with identical definitions

I have two tables, A and B with identical columns. Table B can contain some rows where data are different from A. How can I write a query that shows rows that should be inserted into B, deleted from B,...
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2 answers
183 views

Is partial synchronisation possible between two databases on different servers?

Imagine a scenario where you have a primary instance of a database and a secondary instance that is automatically synchronised - pretty much as with Availability Groups. My question is whether I could ...
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Seeding new data daily in an ever changing database

I've been working with a data team that imports data from suppliers daily into a MySQL DB. The data from the supplier needs to be worked on by them and formatted properly before we can use it in ...
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2 votes
2 answers
160 views

How to ship new rows from the source to a target server?

Context We have a SQL Server 'source' where daily 10M rows inserted to a table. No updates. I would like to ship the new rows to a 'target' server, then delete those (sooner or later) on the source ...
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Why availability group resource goes offline in WSFC?

Sometimes I find the AG Cluster role in offline state which results the AG in resolving state. It doesn't allow the application to access the databases during this time. And then after sometime it ...
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3 votes
1 answer
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Setting up cloud database for syncing to local SQLite database

Background I have a SQL Server database hosted on AWS RDS and there are web applications and WEB APIs that talk to the database. The database is a multi-tenant database and we are currently using SQL ...
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Database syncronization

I am working on a student project and I need some guidance on what solution I can use. The goal of the project is to create a dummy web page that would send dummy data to 2 databases(or read from one ...
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1 answer
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Database replication from local Postgres to live

I have a software whose data from its local Postgres server has to be synced to live database, so that I can query data from that live Postgres server via api. I am new to Postgres. So after a small ...
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2 answers
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Is it possible to use txid_current value for sync

I need to expose my data through Rest API for a mobile offline experience. The idea is basically that a mobile client downloads all data to his device. after a week he wants to download only the ...
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What is the max network latency between synchronous-commit AlwaysOn Availability Groups [closed]

Is there a maximum supported network latency (ms) between two synchronous AlwaysOn replica? I need to give this information to network administrators for configuring the link between the two nodes of ...
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Azure Data Sync Between Two Azure Databases

I would like to ask if I use Azure data sync with my two azure databases is there any way that I can still download data tier and install it on my local machine. I am planning to create a sync between ...
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what are the best ways to sync two databases in sql server or azure sql db?

I have a question like syncing two different databases available on two different servers/instances. lets say Source be the source server and sourcedb is the source database. destinationdb is the ...
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How to resynchronize replica in Postgresql

I have a server with Centos6 and Postgresql 9.2, I have set up a replica in postgresql to another server of the same characteristics, today in the morning I have an error in the archiver process on ...
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1 vote
1 answer
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Will a MERGE between two tables ever be faster than a DROP and SELECT INTO on the second table?

Is there a scenario where it's faster for synchronizing the data from TableA to TableB by using a MERGE query as opposed to dropping TableB and doing a SELECT * INTO TableB FROM TableA?
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For AlwaysOn AGs, can a secondary replica cause contention on the primary when the resources of the secondary are maxed out?

Is it possible and in what ways can the secondary replica cause contention against the primary replica when the secondary replica's resources are maxed out (e.g. does the primary "lock" up while ...
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How to use a MySQL database both remotely and locally

I cannot find the best solution for my problem. I made a C++ application which runs on a Kiosk under Ubuntu that needs to store and retrieve data from a MySQL database and these same data need to be ...
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7 votes
1 answer
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Is there a way to determine what kind of data is sitting in the Redo Queue for an AlwaysOn AG Secondary Replica?

Do any of the DMVs or is there another way to expose what kind of data is in the Redo Queue that's in process of being synced up to a secondary replica? (E.g. is it table data and which table, or is ...
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2 votes
1 answer
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What's the cause for an AlwaysOn AG Secondary Replica to have a high Redo Queue Size and Estimated Recovery Time with a good Redo Rate?

SQL14 is the Primary server, SQL16 is the Secondary Replica, and they're setup using synchronous commit availability mode: As of yesterday it appeared that data stopped synchronizing from the primary ...
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1 vote
1 answer
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How would I maintain referential integrity across a database where I use versioned records while keeping data in sync?

I am building a database that consists of a few tables that are used as data sources for a form our application generates. [form] [question] [responses] id id id name ...
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Options for syncing from a MASTER table to a COPY table?

I have a MASTER table and a COPY table in separate databases (both are Oracle 12c). I want to sync the MASTER table with the COPY table on a weekly basis. I can think of a few options for syncing ...
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Any way of forcing MySQL to use smaller files?

This is actually Maria DB. I'm using it on W10 and Linux Mint 18.3. The issue here is that I recently strated to use Google Backup & Sync to sync between my various machines running W10 (I'm ...
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Best way to replicate MySQL database tables

I'm trying to wrap my head around the many options on how to possibly sync database tables automatically from one database to the next (and next, and next, ...). We're trying to create a very simple ...
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1 vote
4 answers
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Integration: Keep two systems in sync

I have a GIS system with 40 tables, ranging from 1,000 to 60,000 rows per table. The tables are the system of record for assets in a municipality. The GIS assets in the tables get integrated to a ...
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1 vote
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SQL Server Merge Replication Error: The format of a message during Web synchronization was invalid

I am doing Merge Replication using Web Synchronization. On Subscriber end, there is SQL Express 2012 on Windows 10 Pro. On publisher end, there is SQL Server 2016 on Windows Server 2016. Web ...
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1 answer
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SQL transaction: Delete between two selects possible?

I have two SELECT statements within a transaction (repeatable read) Select @firstItem =id from myTable Where .... --Do some more magic, so I can't concat the the two queries!!!! and Select * from ...
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2 answers
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Sync database table schema and stored procedures

We have 2 databases. One is at our server, the other is local. We need to sync them both in a manner that local database has all data and server database has no data only empty tables and stored ...
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Database synchronization 2 times a day -MariaDB

I have 2 different servers. The first one is server1 and the other is server2. On servers, one works for websites (server1) and the other for mobile applications (server2) for security purposes. I ...
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Add a new node to Mongo Replicaset using Rsync

I have a 3 shard mongo cluster. Each shard has a 3 node replica set. On each shard, the data size is 3 TB. I want to add 1 more node to each replica set. But its taking lot of time. The initial sync ...
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Change Data Capture in MySQL/PHP by writing to a MySQL table (rather than streaming to Kafka/Rabbit/etc)?

I have a small internal web app I'm developing with PHP and MySQL. I'm looking to sync client webpages to a server by requesting all changes since a certain date. I've found a number of solutions ...
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3 answers
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Sync between two database on azure

I would like to ask a question how to setup azure syncing of two database on azure i need real time data replication to the other database
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Load data from a temporal table to another temporal table in Azure

Currently we have only a Live Database where all our data resides. I have created a separate Azure server and DB for development. The DEV DB should be some what up to date with the Live DB for ...
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1 answer
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Master Master replication rows not sync properly

I have a wordpress website that run on 3 machines Machine1 | Machine 2 {nginx+lsyncd+mysql} visitor > cloudflare > haproxy ------ ...
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1 vote
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384 views

Sync PostgreSQL with Cloud and multi Local Locations

I need help with a complex (for me) multi server setup with PostgreSQL. I have to setup a Cloud Server and 3 Local Servers for our company. Each Server will have: Linux Ubuntu 16.04 Docker ...
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SQL Server 2016 Availability Group (Primary Unable to Read/Write)

We have a 3 replica SQL Server 2016 availability group. When the secondary synchronous goes unhealthy the database that resides on the primary becomes unreadable / unwritable, at this time the primary ...
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1 answer
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MySQL synchronization

I have a cloud-based MySQL instance (slave) and am planning a solution where a remote instance (master) will be based on a ship. The ship will go in and out of international waters and therefore will ...
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1 answer
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Tools to ingest data to database in periods [closed]

We have an application that can work with Oracle or MySql or SQLServer databases. Also, there is a 3rd party data source that we need to have it's latest data records in our database every 15 minutes. ...
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2 votes
2 answers
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Sync two postgres databases from two sperate locations with no network

I have 2 postgres databases running the same schemes on two different computers, that are not guaranteed to have any network connection while having to handle read/write requests. Because they ...
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1 answer
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How to insert data from a local MSSQL db table to a remote MSSQL db table using WCF application coded in .NET [closed]

I made a WPF application using VS2013, coded in .NET. It is working fine in my local SQL Server. But I want to use it to upload data from a local database to a remote database. How can I do this? I ...
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1 answer
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Archival copy of table, including overwrote data [closed]

I have database server, with a database and table. The database and table can not be changed by me to ensure 3rd party support but the server configuration and MySQL configuration can be. On that ...
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