migration-eval

This repository provides scripts that assist the Timescale migration team in selecting the optimal migration strategy to Timescale Cloud for your specific database.

You will need Python 3.x and psql to run the scripts.

To recommend a suitable migration strategy for your database, we'll need some information about its current state. You can collect this information by running the following command:

curl -sL https://assets.timescale.com/releases/migration/evaluate.py | python3 - "<POSTGRES_URI>" <wait-duration> > report.txt

where

• <POSTGRES_URI> is the URI of your source database.
• <wait-duration> is the amount of time in seconds to consider while computing rate based metrics, eg, rate of transactions per second. This argument is optional and defaults to 1 minute.

The above command will:

• Download the latest evaluation script
• Run queries against your Postgres database
• Save the results necessary for evaluating the suitable migration strategy to a file named "report.txt"

Please share the generated "report.txt" file with us for further analysis.

When executed on a database with TimescaleDB installed, the script generates the following report:

PostgreSQL version: PostgreSQL 15.6 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 13.2.1 20231011 (Red Hat 13.2.1-4), 64-bit
Database size: 751 MB
Num tables: 74
Num regular PostgreSQL tables excl. Hypertables: 8
Num declarative partitions: 2
Non-standard tablespaces: -
Current database: tsbs
Other databases: {_timescaledb,defaultdb}
Schemas: {public,iot}
TimescaleDB version: 2.13.1
Num TimescaleDB Hypertables: 2
Num TimescaleDB Continuous Aggregates: 1
Num TimescaleDB space dimensions: 2
TimescaleDB extension schema: public
TimescaleDB features: {hypertables,continuous_aggregates,retention,compression,background_jobs}
Unsupported extensions in Timescale Cloud: [{"aiven_extras" : "1.1.12"}]
Rate of inserts, updates, deletes and transactions (per sec): 10791.750, 0.000, 0.000, 43.667
Do compressed chunks have mutable (insert/update/delete) compression*: f
Do tables have generated columns: f
Do tables attributes have NaN, Infinity or -Infinity*: f
WAL activity: 19786.500 wal_records_per_sec, 2.172 wal_megabytes_per_sec

Note: Metrics with an asterisk (*) will require further confirmation from the user. This is because they represent the temporary state of the database, and the actual answer may vary depending on the applications.