#MigrationService

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bccunited 1 year ago

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!

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govindhtech 1 year ago

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.

Volusion to Magento Migration Service

Meetanshi provides Volusion to Magento Migration Service for an easy and smooth migration. Take the security and performance of your store to the next level.

Volusion and Magento are two of the most popular eCommerce platforms used by the online business owners. Volusion is one of the older eCommerce CMS platforms, which was founded in 1999.

This over two decades old eCommerce platform lacks innovative features and functionalities like Magento. The store owners that are currently running on Volusion and looking to scale up their business may be required to migrate to Magento for better performance and more innovative features.

Magento is a powerful and robust eCommerce platform, which is currently acquired by Adobe. It offers more than 120 free themes on its marketplace and provides the store owners with high customizability options. Volusion store owners may decide to migrate to Magento due to its flexibility and scalability.

Meetanshi is providing Volusion to Magento Migration Service to allow the store owners to shift to Magento to scale up their business. Store owners just need to sit back and relax, eCommerce development professionals will make sure about a smooth and secure Volusion to Magento migration.

Our professional team will make sure the complete store is migrated to Magento having every detail about the products, product categories, manufacturers, taxes, customers, orders, coupons, and reviews.

Why Choose Meetanshi for Volusion to Magento Migration?

Experienced Professionals: Your store will be in safe hands. Our dedicated professionals will carry out the migration with utmost care.
Fast Delivery: We will try to deliver the project as soon as possible.
Warranty: We provide assurance about the quality of the service. Get 6 months warranty from the date of migration. Any issues and we’ll be there to help!
Minimum Downtime: Don’t lose sales during the migration. Meetanshi provides efficient migration with almost nil downtime.
Data Safety: We know your data is valuable, and we promise its safety.
Security: Our professionals will carry out the migration in a secure environment and make sure your site is secure from security threats.

Opt for Meetanshi’s Volusion to Magento migration service for a smooth and flawless migration. Read more at: https://meetanshi.com/volusion-to-magento-migration-service.html

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meetanshi 3 years ago

meetanshi

Magento 2 Migration Service

Avail Magento 2 Migration Service by Meetanshi for latest features of E-commerce. Offer a feature rich and secure Magento 2 store to the customers now!

Magento announced the end of software support through June 2020. After over a decade of development, Magento will reach the “End of Life” which demands migration of stores which are still functioning in Magento 1.x versions. It is high time that merchants migrate their store to the updated Magento 2 version to avail the advantages of latest creativities in the E-commerce world.

While it can be a complicated process, choosing Meetanshi’s Magento 2 Migration Service will ease your task. Sit back and relax while we will do it for you without any data loss and almost zero downtime.

With our record of 200+ successful Magento migration services offered, we assure to deliver a flawless Magento 2.0 migration that’ll help grow your business!

Our way of rendering Magento 2 Migration Service:

• Getting store access details of your current Magento version, backing up of the store and preparing a staging environment.

• Migration of your Magento store to the latest Magento 2 version and solving issues which take place while performing the upgrade.

• QA testing and verification.

• Publication of all new Magento 2 store to live environment.

Our Magento 2 Migration Service comprises of:

• Expertise

• Professional knowledge in the field

• Guaranteed No data loss

• Zero downtime

Take the migration service now for a user-friendly interface, flexible architecture, better admin panel, mobile friendly designs and theme layouts and much more.

For more information, visit: https://meetanshi.com/magento-1-to-magento-2-migration-service.html

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meetanshi 3 years ago

Shopify to Magento Migration Service

meetanshi

Avail Meetanshi’s Shopify to Magento Migration service if you are willing to migrate your current store to the latest Magento 2 version.

Running an eCommerce store is a complicated as well as challenging task. One needs to select an eCommerce platform wisely that satisfies your business requirements. The process of migration is complex and requires expert’s attention as to not risk the store’s crucial data and security of customers’ sensitive information.

Magento can be the perfect choice for the store owners as it is provided with advanced functionalities and customization facilities. The latest Magento version 2.4.3 is equipped with features such as Page Builder, GraphQL and advanced security. Due to several such reasons, people opt to migrate to their latest Magento 2 version.

This complexity of migrating your store can be reduced by opting for Meetanshi’s Shopify to Magento migration service. The dedicated developers at Meetanshi ensure high security, minimum downtime and no data loss.

Why Choose Meetanshi for Shopify to Magento 2 Migration?

Dedicated Magento developers
On-time delivery
Zero downtime
Advanced security
Prevents data loss

Willing to know more about Meetanshi’s Shopify to Magento migration service? To know more, visit https://meetanshi.com/shopify-to-magento-migration-service.html

Video

proseditor 8 years ago

proseditor

Website Migration services by Pixxelz Net
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