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feat: create benchmarks for merge (delta-io#1857)
# Description Implements benchmarks that are similar to Spark's Delta benchmarks. Enable us to have a standard benchmark to measure improvements to merge and some pieces can be factored out to build a framework for bench marking delta workflows.
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[package] | ||
name = "delta-benchmarks" | ||
version = "0.0.1" | ||
authors = ["David Blajda <[email protected]>"] | ||
homepage = "https://github.com/delta-io/delta.rs" | ||
license = "Apache-2.0" | ||
keywords = ["deltalake", "delta", "datalake"] | ||
description = "Delta-rs Benchmarks" | ||
edition = "2021" | ||
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[dependencies] | ||
clap = { version = "4", features = [ "derive" ] } | ||
chrono = { version = "0.4.31", default-features = false, features = ["clock"] } | ||
tokio = { version = "1", features = ["fs", "macros", "rt", "io-util"] } | ||
env_logger = "0" | ||
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# arrow | ||
arrow = { workspace = true } | ||
arrow-array = { workspace = true } | ||
arrow-buffer = { workspace = true } | ||
arrow-cast = { workspace = true } | ||
arrow-ord = { workspace = true } | ||
arrow-row = { workspace = true } | ||
arrow-schema = { workspace = true, features = ["serde"] } | ||
arrow-select = { workspace = true } | ||
parquet = { workspace = true, features = [ | ||
"async", | ||
"object_store", | ||
] } | ||
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# serde | ||
serde = { workspace = true, features = ["derive"] } | ||
serde_json = { workspace = true } | ||
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# datafusion | ||
datafusion = { workspace = true } | ||
datafusion-expr = { workspace = true } | ||
datafusion-common = { workspace = true } | ||
datafusion-proto = { workspace = true } | ||
datafusion-sql = { workspace = true } | ||
datafusion-physical-expr = { workspace = true } | ||
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[dependencies.deltalake-core] | ||
path = "../deltalake-core" | ||
version = "0" | ||
features = ["datafusion"] |
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# Merge | ||
The merge benchmarks are similar to the ones used by [Delta Spark](https://github.com/delta-io/delta/pull/1835). | ||
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## Dataset | ||
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Databricks maintains a public S3 bucket of the TPC-DS dataset with various factor where requesters must pay to download this dataset. Below is an example of how to list the 1gb scale factor | ||
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``` | ||
aws s3api list-objects --bucket devrel-delta-datasets --request-payer requester --prefix tpcds-2.13/tpcds_sf1_parquet/web_returns/ | ||
``` | ||
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You can generate the TPC-DS dataset yourself by downloading and compiling [the generator](https://www.tpc.org/tpc_documents_current_versions/current_specifications5.asp) | ||
You may need to update the CFLAGS to include `-fcommon` to compile on newer versions of GCC. | ||
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## Commands | ||
These commands can be executed from the root of the benchmark crate. Some commands depend on the existance of the TPC-DS Dataset existing. | ||
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### Convert | ||
Converts a TPC-DS web_returns csv into a Delta table | ||
Assumes the dataset is pipe delimited and records do not have a trailing delimiter | ||
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``` | ||
cargo run --release --bin merge -- convert data/tpcds/web_returns.dat data/web_returns | ||
``` | ||
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### Standard | ||
Execute the standard merge bench suite. | ||
Results can be saved to a delta table for further analysis. | ||
This table has the following schema: | ||
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group_id: Used to group all tests that executed as a part of this call. Default value is the timestamp of execution | ||
name: The benchmark name that was executed | ||
sample: The iteration number for a given benchmark name | ||
duration_ms: How long the benchmark took in ms | ||
data: Free field to pack any additonal data | ||
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``` | ||
cargo run --release --bin merge -- standard data/web_returns 1 data/merge_results | ||
``` | ||
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### Compare | ||
Compare the results of two different runs. | ||
The a Delta table paths and the `group_id` of each run and obtain the speedup for each test case | ||
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``` | ||
cargo run --release --bin merge -- compare data/benchmarks/ 1698636172801 data/benchmarks/ 1699759539902 | ||
``` | ||
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### Show | ||
Show all benchmarks results from a delta table | ||
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``` | ||
cargo run --release --bin merge -- show data/benchmark | ||
``` |
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