61de3f9287
The Rust implementation is multithreaded, performs better in general and
does custom compression of btree nodes to achieve much better compression
ratios. unpack also checksums expanded metadata to validate it.
Format version has jumped to 3, no backwards compatibility, but I think
that's ok since we never made a release that contained the C++ version
of these tools.
Benchmarks
==========
On an 8 core, 16 hyperthread machine.
metadata 1G, full:
Pack size pack time unpack time
------------------------------------------------------
C++ 193M 50.3s 6.9s (no verify)
Rust 70M 1.4s 1.8s (verify)
metadata 16G, sparse:
Pack size pack time unpack time
------------------------------------------------------
C++ 21M 68s 1s (no verify)
Rust 4M 8.6s 0.5s (verify)
33 lines
1.0 KiB
Rust
33 lines
1.0 KiB
Rust
extern crate clap;
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extern crate thinp;
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use clap::{App, Arg};
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use std::process;
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fn main() {
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let parser = App::new("thin_metadata_pack")
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.version("0.8.5") // FIXME: use actual version
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.about("Produces a compressed file of thin metadata. Only packs metadata blocks that are actually used.")
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.arg(Arg::with_name("INPUT")
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.help("Specify thinp metadata binary device/file")
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.required(true)
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.short("i")
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.value_name("DEV")
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.takes_value(true))
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.arg(Arg::with_name("OUTPUT")
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.help("Specify packed output file")
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.required(true)
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.short("o")
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.value_name("FILE")
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.takes_value(true));
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let matches = parser.get_matches();
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let input_file = matches.value_of("INPUT").unwrap();
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let output_file = matches.value_of("OUTPUT").unwrap();
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if let Err(reason) = thinp::pack::pack::pack(&input_file, &output_file) {
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println!("Application error: {}\n", reason);
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process::exit(1);
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}
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}
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