#MigrationService

[bccunited]

Transform and Succeed! Change is crucial for growth. Our migration services provide seamless transitions from old to new, ensuring your systems are always at the forefront of technology!

[govindhtech]

GCP Database Migration Service Boosts PostgreSQL migrations

GCP database migration service

GCP Database Migration Service (DMS) simplifies data migration to Google  Cloud databases for new workloads. DMS offers continuous migrations from MySQL, PostgreSQL, and SQL Server to Cloud SQL and AlloyDB for PostgreSQL. DMS migrates Oracle workloads to Cloud SQL for PostgreSQL and AlloyDB to modernise them. DMS simplifies data migration to Google Cloud databases.

This blog post will discuss ways to speed up Cloud SQL migrations for PostgreSQL / AlloyDB workloads.

Large-scale database migration challenges

The main purpose of Database Migration Service is to move databases smoothly with little downtime. With huge production workloads, migration speed is crucial to the experience. Slower migration times can affect PostgreSQL databases like:

Long time for destination to catch up with source after replication.

Long-running copy operations pause vacuum, causing source transaction wraparound.

Increased WAL Logs size leads to increased source disc use.

Boost migrations

To speed migrations, Google can fine-tune some settings to avoid aforementioned concerns. The following options apply to Cloud SQL and AlloyDB destinations. Improve migration speeds. Adjust the following settings in various categories:

DMS parallels initial load and change data capture (CDC).

Configure source and target PostgreSQL parameters.

Improve machine and network settings

Examine these in detail.

Parallel initial load and CDC with DMS

Google’s new DMS functionality uses PostgreSQL multiple subscriptions to migrate data in parallel by setting up pglogical subscriptions between the source and destination databases. This feature migrates data in parallel streams during data load and CDC.

Database Migration Service’s UI and Cloud SQL APIs default to OPTIMAL, which balances performance and source database load. You can increase migration speed by selecting MAXIMUM, which delivers the maximum dump speeds.

Based on your setting,

DMS calculates the optimal number of subscriptions (the receiving side of pglogical replication) per database based on database and instance-size information.

To balance replication set sizes among subscriptions, tables are assigned to distinct replication sets based on size.

Individual subscription connections copy data in simultaneously, resulting in CDC.

In Google’s experience, MAXIMUM mode speeds migration multifold compared to MINIMAL / OPTIMAL mode.

The MAXIMUM setting delivers the fastest speeds, but if the source is already under load, it may slow application performance. So check source resource use before choosing this option.

Configure source and target PostgreSQL parameters.

CDC and initial load can be optimised with these database options. The suggestions have a range of values, which you must test and set based on your workload.

Target instance fine-tuning

These destination database configurations can be fine-tuned.

max_wal_size: Set this in range of 20GB-50GB

The system setting max_wal_size limits WAL growth during automatic checkpoints. Higher wal size reduces checkpoint frequency, improving migration resource allocation. The default max_wal_size can create DMS load checkpoints every few seconds. Google can set max_wal_size between 20GB and 50GB depending on machine tier to avoid this. Higher values improve migration speeds, especially beginning load. AlloyDB manages checkpoints automatically, therefore this argument is not needed. After migration, modify the value to fit production workload requirements.

pglogical.synchronous_commit : Set this to off 

As the name implies, pglogical.synchronous_commit can acknowledge commits before flushing WAL records to disc. WAL flush depends on wal_writer_delay parameters. This is an asynchronous commit, which speeds up CDC DML modifications but reduces durability. Last few asynchronous commits may be lost if PostgreSQL crashes.

wal_buffers : Set 32–64 MB in 4 vCPU machines, 64–128 MB in 8–16 vCPU machines

Wal buffers show the amount of shared memory utilised for unwritten WAL data. Initial load commit frequency should be reduced. Set it to 256MB for greater vCPU objectives. Smaller wal_buffers increase commit frequency, hence increasing them helps initial load.

maintenance_work_mem: Suggested value of 1GB / size of biggest index if possible 

PostgreSQL maintenance operations like VACUUM, CREATE INDEX, and ALTER TABLE ADD FOREIGN KEY employ maintenance_work_mem. Databases execute these actions sequentially. Before CDC, DMS migrates initial load data and rebuilds destination indexes and constraints. Maintenance_work_mem optimises memory for constraint construction. Increase this value beyond 64 MB. Past studies with 1 GB yielded good results. If possible, this setting should be close to the destination’s greatest index to replicate. After migration, reset this parameter to the default value to avoid affecting application query processing.

max_parallel_maintenance_workers: Proportional to CPU count

Following data migration, DMS uses pg_restore to recreate secondary indexes on the destination. DMS chooses the best parallel configuration for –jobs depending on target machine configuration. Set max_parallel_maintenance_workers on the destination for parallel index creation to speed up CREATE INDEX calls. The default option is 2, although the destination instance’s CPU count and memory can increase it. After migration, reset this parameter to the default value to avoid affecting application query processing.

max_parallel_workers: Set proportional max_worker_processes

The max_parallel_workers flag increases the system’s parallel worker limit. The default value is 8. Setting this above max_worker_processes has no effect because parallel workers are taken from that pool. Maximum parallel workers should be equal to or more than maximum parallel maintenance workers.

autovacuum: Off

Turn off autovacuum in the destination until replication lag is low if there is a lot of data to catch up on during the CDC phase. To speed up a one-time manual hoover before promoting an instance, specify max_parallel_maintenance_workers=4 (set it to the  Cloud SQL instance’s vCPUs) and maintenance_work_mem=10GB or greater. Note that manual hoover uses maintenance_work_mem. Turn on autovacuum after migration.

Source instance configurations for fine tuning

Finally, for source instance fine tuning, consider these configurations:

Shared_buffers: Set to 60% of RAM 

The database server allocates shared memory buffers using the shared_buffers argument. Increase shared_buffers to 60% of the source PostgreSQL database‘s RAM to improve initial load performance and buffer SELECTs.

Adjust machine and network settings

Another factor in faster migrations is machine or network configuration. Larger destination and source configurations (RAM, CPU, Disc IO) speed migrations.

Here are some methods:

Consider a large machine tier for the destination instance when migrating with DMS. Before promoting the instance, degrade the machine to a lower tier after migration. This requires a machine restart. Since this is done before promoting the instance, source downtime is usually unaffected.

Network bandwidth is limited by vCPUs. The network egress cap on write throughput for each VM depends on its type. VM network egress throughput limits disc throughput to 0.48MBps per GB. Disc IOPS is 30/GB. Choose Cloud SQL instances with more vCPUs. Increase disc space for throughput and IOPS.

Google’s experiments show that private IP migrations are 20% faster than public IP migrations.

Size initial storage based on the migration workload’s throughput and IOPS, not just the source database size.

The number of vCPUs in the target Cloud SQL instance determines Index Rebuild parallel threads. (DMS creates secondary indexes and constraints after initial load but before CDC.)

Last ideas and limitations

DMS may not improve speed if the source has a huge table that holds most of the data in the database being migrated. The current parallelism is table-level due to pglogical constraints. Future updates will solve the inability to parallelise table data.

Do not activate automated backups during migration. DDLs on the source are not supported for replication, therefore avoid them.

Fine-tuning source and destination instance configurations, using optimal machine and network configurations, and monitoring workflow steps optimise DMS migrations. Faster DMS migrations are possible by following best practices and addressing potential issues.

Read more on govindhtech.com

[brandngraves]

Drupal to WordPress Migration Service: Expert Transition Assistance

Transitioning your website from Drupal to WordPress? Our team offers expert Drupal to WordPress migration services tailored to your needs. Whether it's for enhanced functionality, ease of use, or improved SEO, we ensure a seamless transfer of your content and design elements. From data migration to plugin integration, trust us to handle the entire Drupal to WordPress migration service process efficiently and effectively.

[polyxersystems]

Data Warehousing and Data Migration Service

We have experienced consultants that assist businesses with the right knowledge of tools to integrate into their business for Data Migration and Warehousing. Data migration and warehouse management are used by businesses to proactively evolve with technological changes. We at Polyxer, accelerate and simplify data migration & warehouse management of business applications to the cloud seamlessly & securely.

What We Do?

Application Migration

Database Migration

Cloud Migration

[gobrittpaige]

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Australia Visa & Migration Agents – 485 & PR Pathways

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[simple-logic]

Simple Logic migrated a database from MSSQL to MySQL, achieving cost savings, better performance, and enhanced security with Linux support and open-source flexibility. 🚀 Challenges: High licensing costs with MSSQL💸 Limited Linux support, creating compatibility issues🐧 Our Solution: Seamlessly migrated all data from MSSQL to MYSQL🚛 Rewrote stored procedures and adapted them for MYSQL compatibility🔧 Efficiently transitioned sequences to ensure data consistency📜 Enabled significant cost savings by moving to an open-source database💰 The Results: Enhanced database performance and scalability🚀 Improved security and robust Linux support🛡️ Open-source flexibility, reducing dependency on proprietary systems🔓 Ready to transform your database infrastructure? Partner with Simple Logic for reliable migration services! 🎯 💻 Explore insights on the latest in #technology on our Blog Page 👉 https://simplelogic-it.com/blogs/ 🚀 Ready for your next career move? Check out our #careers page for exciting opportunities 👉 https://simplelogic-it.com/careers/ 👉 Contact us here: https://simplelogic-it.com/contact-us/

[worlditinsights]

The Ultimate Guide to Database Migration Services for Modern Enterprises

Effective data management is an inevitable step in this digital world. Database migration services play an important role in businesses which are trying to improve their infrastructure by making transitions smoother, system upgradation or database consolidation.Vee Technologies, being one of the renowned and top database migration companies, provides curated services to achieve the desired outcomes of businesses. There is a process that our expert team follows to make sure that data is migrated efficiently and accurately, leading to less downtime and safeguarding of data integrity.What Makes Vee Technologies the Best Choice for Data Migration Services?We provide services worldwide and have a good name among database migration companies in India. Every business has different requirements, and we will make sure each customised strategy you’re applying, helps in improving your desired outcomes.Expertise Across Platforms: We have expertise in handling migrations across various databases like relational, NoSQL, and cloud-based systems.Complete Support: We provide actionable solutions from initial assessment to post-migration validation.Global Reach: We stand by businesses globally with innovate migration solutions along with a strong presence in both India and the US.Data Security: We give importance to privacy of data, and make sure of compliance with industry regulations.Database migration companies in US usually focus more on flexible and scalable database solutions and we also, at Vee Technologies, utilize the technological advancements to deliver the best services.Our global presence is what makes us stand out among database migration companies. We can assure you that we will keep your data integrity intact throughout all processes like modernization of your infrastructure, migration to the cloud, or consolidation of databases. Connect with Vee Technologies for effective database migration solutions.

[alkirachristopher]

Good Practices for Smooth Database Migration 

Migrating databases can be a challenging process, and it can become a smooth one with the right expertise. Professional database migration services are important to ensure data security and accuracy during transition process. 

Companies like Vee Technologies are renowned as one of the top database migration companies that helps global businesses by providing specialised solutions. It doesn't matter whether you’re looking for database migration companies in India or database migration companies in US, expert services will help you optimize performance and minimize risks. 

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[riacharlotte]

Trusted Database Migration Services in India and the US

With their end-to-end database migration services, Vee Technologies delivers unparalleled results. Whether your company is upgrading to new technology, merging data, or switching to a new database, their specialists are prepared to make the process quick, easy, and efficient.

Explore More: https://www.veetechnologies.com/services/it-services/data-analytics-services-and-solutions/database-services/database-migration-services.htm

[veetechnologies-it]

The Ultimate Guide to Database Migration Services for Modern Enterprises

Effective data management is an inevitable step in this digital world. Database migration services play an important role in businesses which are trying to improve their infrastructure by making transitions smoother, system upgradation or database consolidation.  

Vee Technologies, being one of the renowned and top database migration companies, provides curated services to achieve the desired outcomes of businesses. There is a process that our expert team follows to make sure that data is migrated efficiently and accurately, leading to less downtime and safeguarding of data integrity. 

What Makes Vee Technologies the Best Choice for Data Migration Services? 

We provide services worldwide and have a good name among database migration companies in India. Every business has different requirements, and we will make sure each customised strategy you’re applying, helps in improving your desired outcomes. 

Expertise Across Platforms: We have expertise in handling migrations across various databases like relational, NoSQL, and cloud-based systems. 

Complete Support: We provide actionable solutions from initial assessment to post-migration validation. 

Global Reach: We stand by businesses globally with innovate migration solutions along with a strong presence in both India and the US. 

Data Security: We give importance to privacy of data, and make sure of compliance with industry regulations. 

Database migration companies in US usually focus more on flexible and scalable database solutions and we also, at Vee Technologies, utilize the technological advancements to deliver the best services. 

Our global presence is what makes us stand out among database migration companies. We can assure you that we will keep your data integrity intact throughout all processes like modernization of your infrastructure, migration to the cloud, or consolidation of databases. Connect with Vee Technologies for effective database migration solutions. 

[growsmarteducationmigration]

Dreaming of a Nursing Career - GroWsmart Education & Migration

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[brandngraves]

In the ongoing debate of Drupal vs. Joomla: Which Is Better in 2023, the answer may lead you to consider a change altogether. If you're contemplating a shift, our Drupal to WordPress migration service at HireWPGeeks can seamlessly transition your website, ensuring you enjoy the robust features of WordPress while preserving your content and functionality. Don't get caught in the Drupal vs. Joomla dilemma; let us empower your digital presence with a swift and secure migration to WordPress. Make the switch today for a brighter online future.

[altdigitaltechnologies]

So, is your company ready for the cloud? Migration to Microsoft Azure may indeed be the move needed to make you the game-changer!

Moving to Azure has such wonderful benefits, but don't forget to weigh all that's to offer and against before making that switch.

Benefits of Azure Migrate. Scalable: Scale up or down according to the growth of your business. Cost-effectiveness: You pay for only what you have used, and hence, no waste or unnecessary spending. Top-class security: Reap robust features and compliance certificates with Azure. Global access. Improve the performance of your application across the globe. All the data centers of Azure are accessible to every single person on the earth. Hybrid integration. Hybrid integration is not really an advantage but rather a feature that you would welcome with glee. It can be quite easy to integrate on-premises data into the cloud resources.

Dealing With Cons: ⚠️ Steep Learning Curve: It may take some time for your team to get accustomed to the Azure platform. ⚠️ The system May Experience Downtime: This is a very rare possibility, however, but it can also come in the way of operation. ⚠️ Cost Upward Creep: In case you do not learn how to restrain usage properly as workloads scale, then it becomes a problem.

Most of the times with Azure are characterized by having most pros weighed against very few cons, offering it flexibility and security in a global reach. Are you considering the move? Let's connect to see how we can work toward making the Azure migration suited for your business!

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[heenanbrownemigration]

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