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Initial commit
This commit is contained in:
Kerollmops
parent
4573f00a0d
commit
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||||||
|
checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wasi"
|
||||||
|
version = "0.9.0+wasi-snapshot-preview1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "winapi"
|
||||||
|
version = "0.3.8"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
|
||||||
|
dependencies = [
|
||||||
|
"winapi-i686-pc-windows-gnu",
|
||||||
|
"winapi-x86_64-pc-windows-gnu",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "winapi-i686-pc-windows-gnu"
|
||||||
|
version = "0.4.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "winapi-x86_64-pc-windows-gnu"
|
||||||
|
version = "0.4.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "zerocopy"
|
||||||
|
version = "0.3.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "6580539ad917b7c026220c4b3f2c08d52ce54d6ce0dc491e66002e35388fab46"
|
||||||
|
dependencies = [
|
||||||
|
"byteorder",
|
||||||
|
"zerocopy-derive",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "zerocopy-derive"
|
||||||
|
version = "0.2.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "d498dbd1fd7beb83c86709ae1c33ca50942889473473d287d56ce4770a18edfb"
|
||||||
|
dependencies = [
|
||||||
|
"proc-macro2",
|
||||||
|
"syn",
|
||||||
|
"synstructure",
|
||||||
|
]
|
||||||
27
Cargo.toml
Normal file
27
Cargo.toml
Normal file
@ -0,0 +1,27 @@
|
|||||||
|
[package]
|
||||||
|
name = "mega-mini-indexer"
|
||||||
|
version = "0.1.0"
|
||||||
|
authors = ["Kerollmops <clement@meilisearch.com>"]
|
||||||
|
edition = "2018"
|
||||||
|
|
||||||
|
[dependencies]
|
||||||
|
anyhow = "1.0.28"
|
||||||
|
bitpacking = "0.8.2"
|
||||||
|
byteorder = "1.3.4"
|
||||||
|
csv = "1.1.3"
|
||||||
|
fst = "0.4.3"
|
||||||
|
fxhash = "0.2.1"
|
||||||
|
jemallocator = "0.3.2"
|
||||||
|
rayon = "1.3.0"
|
||||||
|
sdset = "0.4.0"
|
||||||
|
sled = { git = "https://github.com/spacejam/sled.git", rev = "2fe05c9"}
|
||||||
|
slice-group-by = "0.2.6"
|
||||||
|
smallstr = "0.2.0"
|
||||||
|
structopt = { version = "0.3.14", default-features = false }
|
||||||
|
zerocopy = "0.3.0"
|
||||||
|
|
||||||
|
[dev-dependencies]
|
||||||
|
quickcheck = "0.9.2"
|
||||||
|
|
||||||
|
[profile.release]
|
||||||
|
debug = true
|
||||||
11
qc_loop.sh
Executable file
11
qc_loop.sh
Executable file
@ -0,0 +1,11 @@
|
|||||||
|
#!/usr/bin/env bash
|
||||||
|
|
||||||
|
export RUST_BACKTRACE=1
|
||||||
|
|
||||||
|
while true
|
||||||
|
do
|
||||||
|
cargo test qc_ --release -- --nocapture
|
||||||
|
if [[ x$? != x0 ]] ; then
|
||||||
|
exit $?
|
||||||
|
fi
|
||||||
|
done
|
||||||
197
src/bp_vec.rs
Normal file
197
src/bp_vec.rs
Normal file
@ -0,0 +1,197 @@
|
|||||||
|
use byteorder::{ByteOrder, NativeEndian};
|
||||||
|
use bitpacking::{BitPacker, BitPacker4x};
|
||||||
|
|
||||||
|
/// An append only bitpacked u32 vector that ignore order of insertion.
|
||||||
|
#[derive(Default)]
|
||||||
|
pub struct BpVec {
|
||||||
|
compressed: Vec<u8>,
|
||||||
|
uncompressed: Vec<u32>,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl BpVec {
|
||||||
|
pub fn new() -> BpVec {
|
||||||
|
BpVec::default()
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn push(&mut self, elem: u32) {
|
||||||
|
self.uncompressed.push(elem);
|
||||||
|
if self.uncompressed.len() == BitPacker4x::BLOCK_LEN {
|
||||||
|
encode(&mut self.uncompressed[..], &mut self.compressed);
|
||||||
|
self.uncompressed.clear();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn extend_from_slice(&mut self, elems: &[u32]) {
|
||||||
|
self.uncompressed.extend_from_slice(elems);
|
||||||
|
let remaining = self.uncompressed.len() % BitPacker4x::BLOCK_LEN;
|
||||||
|
for chunk in self.uncompressed[remaining..].chunks_exact_mut(BitPacker4x::BLOCK_LEN) {
|
||||||
|
encode(chunk, &mut self.compressed);
|
||||||
|
}
|
||||||
|
self.uncompressed.truncate(remaining);
|
||||||
|
self.uncompressed.shrink_to_fit();
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn to_vec(self) -> Vec<u32> {
|
||||||
|
let BpVec { compressed, mut uncompressed } = self;
|
||||||
|
decode(&compressed, &mut uncompressed);
|
||||||
|
uncompressed
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn capacity(&self) -> usize {
|
||||||
|
self.compressed.capacity() + self.uncompressed.capacity()
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn encode(items: &mut [u32], encoded: &mut Vec<u8>) {
|
||||||
|
assert_eq!(items.len(), BitPacker4x::BLOCK_LEN);
|
||||||
|
|
||||||
|
let bitpacker = BitPacker4x::new();
|
||||||
|
|
||||||
|
// We reserve enough space in the output buffer, filled with zeroes.
|
||||||
|
let len = encoded.len();
|
||||||
|
// initial_value + num_bits + encoded numbers
|
||||||
|
let max_possible_length = 4 + 1 + 4 * BitPacker4x::BLOCK_LEN;
|
||||||
|
encoded.resize(len + max_possible_length, 0);
|
||||||
|
|
||||||
|
// We sort the items to be able to efficiently bitpack them.
|
||||||
|
items.sort_unstable();
|
||||||
|
// We save the initial value to us for this block, the lowest one.
|
||||||
|
let initial_value = items[0];
|
||||||
|
// We compute the number of bits necessary to encode this block
|
||||||
|
let num_bits = bitpacker.num_bits_sorted(initial_value, items);
|
||||||
|
|
||||||
|
// We write the initial value for this block.
|
||||||
|
let buffer = &mut encoded[len..];
|
||||||
|
NativeEndian::write_u32(buffer, initial_value);
|
||||||
|
// We write the num_bits that will be read to decode this block
|
||||||
|
let buffer = &mut buffer[4..];
|
||||||
|
buffer[0] = num_bits;
|
||||||
|
// We encode the block numbers into the buffer using the num_bits
|
||||||
|
let buffer = &mut buffer[1..];
|
||||||
|
let compressed_len = bitpacker.compress_sorted(initial_value, items, buffer, num_bits);
|
||||||
|
|
||||||
|
// We truncate the buffer to the avoid leaking padding zeroes
|
||||||
|
encoded.truncate(len + 4 + 1 + compressed_len);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn decode(mut encoded: &[u8], decoded: &mut Vec<u32>) {
|
||||||
|
let bitpacker = BitPacker4x::new();
|
||||||
|
|
||||||
|
// initial_value + num_bits
|
||||||
|
while let Some(header) = encoded.get(0..4 + 1) {
|
||||||
|
// We extract the header informations
|
||||||
|
let initial_value = NativeEndian::read_u32(header);
|
||||||
|
let num_bits = header[4];
|
||||||
|
let bytes = &encoded[4 + 1..];
|
||||||
|
|
||||||
|
// If the num_bits is equal to zero it means that all encoded numbers were zeroes
|
||||||
|
if num_bits == 0 {
|
||||||
|
decoded.resize(decoded.len() + BitPacker4x::BLOCK_LEN, initial_value);
|
||||||
|
encoded = bytes;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
// We guess the block size based on the num_bits used for this block
|
||||||
|
let block_size = BitPacker4x::compressed_block_size(num_bits);
|
||||||
|
|
||||||
|
// We pad the decoded vector with zeroes
|
||||||
|
let new_len = decoded.len() + BitPacker4x::BLOCK_LEN;
|
||||||
|
decoded.resize(new_len, 0);
|
||||||
|
|
||||||
|
// Create a view into the decoded buffer and decode into it
|
||||||
|
let to_decompress = &mut decoded[new_len - BitPacker4x::BLOCK_LEN..new_len];
|
||||||
|
bitpacker.decompress_sorted(initial_value, &bytes[..block_size], to_decompress, num_bits);
|
||||||
|
|
||||||
|
// Advance the bytes offset to read the next block (+ num_bits)
|
||||||
|
encoded = &bytes[block_size..];
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl sdset::Collection<u32> for BpVec {
|
||||||
|
fn push(&mut self, elem: u32) {
|
||||||
|
BpVec::push(self, elem);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn extend_from_slice(&mut self, elems: &[u32]) {
|
||||||
|
BpVec::extend_from_slice(self, elems);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn extend<I>(&mut self, elems: I) where I: IntoIterator<Item=u32> {
|
||||||
|
elems.into_iter().for_each(|x| BpVec::push(self, x));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[cfg(test)]
|
||||||
|
mod tests {
|
||||||
|
use super::*;
|
||||||
|
|
||||||
|
quickcheck! {
|
||||||
|
fn qc_push(xs: Vec<u32>) -> bool {
|
||||||
|
let mut xs: Vec<_> = xs.iter().cloned().cycle().take(1300).collect();
|
||||||
|
|
||||||
|
let mut bpvec = BpVec::new();
|
||||||
|
xs.iter().for_each(|x| bpvec.push(*x));
|
||||||
|
let mut result = bpvec.to_vec();
|
||||||
|
|
||||||
|
result.sort_unstable();
|
||||||
|
xs.sort_unstable();
|
||||||
|
|
||||||
|
xs == result
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
quickcheck! {
|
||||||
|
fn qc_extend_from_slice(xs: Vec<u32>) -> bool {
|
||||||
|
let mut xs: Vec<_> = xs.iter().cloned().cycle().take(1300).collect();
|
||||||
|
|
||||||
|
let mut bpvec = BpVec::new();
|
||||||
|
bpvec.extend_from_slice(&xs);
|
||||||
|
let mut result = bpvec.to_vec();
|
||||||
|
|
||||||
|
result.sort_unstable();
|
||||||
|
xs.sort_unstable();
|
||||||
|
|
||||||
|
xs == result
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn empty() {
|
||||||
|
let mut bpvec = BpVec::new();
|
||||||
|
bpvec.extend_from_slice(&[]);
|
||||||
|
let result = bpvec.to_vec();
|
||||||
|
|
||||||
|
assert!(result.is_empty());
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn one_zero() {
|
||||||
|
let mut bpvec = BpVec::new();
|
||||||
|
bpvec.extend_from_slice(&[0]);
|
||||||
|
let result = bpvec.to_vec();
|
||||||
|
|
||||||
|
assert_eq!(&[0], &*result);
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn many_zeros() {
|
||||||
|
let xs: Vec<_> = std::iter::repeat(0).take(1300).collect();
|
||||||
|
|
||||||
|
let mut bpvec = BpVec::new();
|
||||||
|
bpvec.extend_from_slice(&xs);
|
||||||
|
let result = bpvec.to_vec();
|
||||||
|
|
||||||
|
assert_eq!(xs, result);
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn many_ones() {
|
||||||
|
let xs: Vec<_> = std::iter::repeat(1).take(1300).collect();
|
||||||
|
|
||||||
|
let mut bpvec = BpVec::new();
|
||||||
|
bpvec.extend_from_slice(&xs);
|
||||||
|
let result = bpvec.to_vec();
|
||||||
|
|
||||||
|
assert_eq!(xs, result);
|
||||||
|
}
|
||||||
|
}
|
||||||
84
src/codec/bitpacker_sorted.rs
Normal file
84
src/codec/bitpacker_sorted.rs
Normal file
@ -0,0 +1,84 @@
|
|||||||
|
use bitpacking::{BitPacker, BitPacker4x};
|
||||||
|
use byteorder::{ReadBytesExt, NativeEndian};
|
||||||
|
use zerocopy::AsBytes;
|
||||||
|
|
||||||
|
pub struct CodecBitPacker4xSorted;
|
||||||
|
|
||||||
|
impl CodecBitPacker4xSorted {
|
||||||
|
pub fn bytes_encode(item: &[u32]) -> Option<Vec<u8>> {
|
||||||
|
// This is a hotfix to the SIGSEGV
|
||||||
|
// https://github.com/tantivy-search/bitpacking/issues/23
|
||||||
|
if item.is_empty() {
|
||||||
|
return Some(Vec::default())
|
||||||
|
}
|
||||||
|
|
||||||
|
let bitpacker = BitPacker4x::new();
|
||||||
|
let mut compressed = Vec::new();
|
||||||
|
let mut initial_value = 0;
|
||||||
|
|
||||||
|
// The number of remaining numbers that don't fit in the block size.
|
||||||
|
compressed.push((item.len() % BitPacker4x::BLOCK_LEN) as u8);
|
||||||
|
|
||||||
|
// we cannot use a mut slice here because of #68630, TooGeneric error.
|
||||||
|
// we can probably avoid this new allocation by directly using the compressed final Vec.
|
||||||
|
let mut buffer = vec![0u8; 4 * BitPacker4x::BLOCK_LEN];
|
||||||
|
|
||||||
|
for chunk in item.chunks(BitPacker4x::BLOCK_LEN) {
|
||||||
|
if chunk.len() == BitPacker4x::BLOCK_LEN {
|
||||||
|
// compute the number of bits necessary to encode this block
|
||||||
|
let num_bits = bitpacker.num_bits_sorted(initial_value, chunk);
|
||||||
|
// Encode the block numbers into the buffer using the num_bits
|
||||||
|
let compressed_len = bitpacker.compress_sorted(initial_value, chunk, &mut buffer, num_bits);
|
||||||
|
// Write the num_bits that will be read to decode this block
|
||||||
|
compressed.push(num_bits);
|
||||||
|
// Wrtie the bytes of the compressed block numbers
|
||||||
|
compressed.extend_from_slice(&buffer[..compressed_len]);
|
||||||
|
// Save the initial_value, which is the last value of the n-1 used for the n block
|
||||||
|
initial_value = *chunk.last().unwrap();
|
||||||
|
} else {
|
||||||
|
// Save the remaining numbers which don't fit inside of a BLOCK_LEN
|
||||||
|
compressed.extend_from_slice(chunk.as_bytes());
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
Some(compressed)
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn bytes_decode(bytes: &[u8]) -> Option<Vec<u32>> {
|
||||||
|
if bytes.is_empty() {
|
||||||
|
return Some(Vec::new())
|
||||||
|
}
|
||||||
|
|
||||||
|
let bitpacker = BitPacker4x::new();
|
||||||
|
let (remaining, bytes) = bytes.split_first().unwrap();
|
||||||
|
let remaining = *remaining as usize;
|
||||||
|
|
||||||
|
let (mut bytes, mut remaining_bytes) = bytes.split_at(bytes.len() - remaining * 4);
|
||||||
|
let mut decompressed = Vec::new();
|
||||||
|
let mut initial_value = 0;
|
||||||
|
|
||||||
|
while let Some(num_bits) = bytes.get(0) {
|
||||||
|
let block_size = BitPacker4x::compressed_block_size(*num_bits);
|
||||||
|
|
||||||
|
let new_len = decompressed.len() + BitPacker4x::BLOCK_LEN;
|
||||||
|
decompressed.resize(new_len, 0);
|
||||||
|
|
||||||
|
// Create a view into the decompressed buffer and decomress into it
|
||||||
|
let to_decompress = &mut decompressed[new_len - BitPacker4x::BLOCK_LEN..new_len];
|
||||||
|
bitpacker.decompress_sorted(initial_value, &bytes[1..block_size + 1], to_decompress, *num_bits);
|
||||||
|
|
||||||
|
// Set the new initial_value for the next block
|
||||||
|
initial_value = *decompressed.last().unwrap();
|
||||||
|
// Advance the bytes offset to read the next block (+ num_bits)
|
||||||
|
bytes = &bytes[block_size + 1..];
|
||||||
|
}
|
||||||
|
|
||||||
|
// We add the remaining uncompressed numbers.
|
||||||
|
let new_len = decompressed.len() + remaining;
|
||||||
|
decompressed.resize(new_len, 0);
|
||||||
|
let to_decompress = &mut decompressed[new_len - remaining..new_len];
|
||||||
|
remaining_bytes.read_u32_into::<NativeEndian>(to_decompress).ok()?;
|
||||||
|
|
||||||
|
Some(decompressed)
|
||||||
|
}
|
||||||
|
}
|
||||||
3
src/codec/mod.rs
Normal file
3
src/codec/mod.rs
Normal file
@ -0,0 +1,3 @@
|
|||||||
|
mod bitpacker_sorted;
|
||||||
|
|
||||||
|
pub use self::bitpacker_sorted::CodecBitPacker4xSorted;
|
||||||
186
src/main.rs
Normal file
186
src/main.rs
Normal file
@ -0,0 +1,186 @@
|
|||||||
|
#[cfg(test)]
|
||||||
|
#[macro_use] extern crate quickcheck;
|
||||||
|
|
||||||
|
mod codec;
|
||||||
|
mod bp_vec;
|
||||||
|
|
||||||
|
use std::collections::{HashMap, BTreeSet};
|
||||||
|
use std::convert::TryFrom;
|
||||||
|
use std::fs::File;
|
||||||
|
use std::hash::BuildHasherDefault;
|
||||||
|
use std::path::PathBuf;
|
||||||
|
|
||||||
|
use anyhow::{ensure, Context};
|
||||||
|
use fst::IntoStreamer;
|
||||||
|
use fxhash::FxHasher32;
|
||||||
|
use rayon::prelude::*;
|
||||||
|
use sdset::{SetOperation, SetBuf};
|
||||||
|
use slice_group_by::StrGroupBy;
|
||||||
|
use structopt::StructOpt;
|
||||||
|
|
||||||
|
use self::codec::CodecBitPacker4xSorted;
|
||||||
|
use self::bp_vec::BpVec;
|
||||||
|
|
||||||
|
pub type FastMap4<K, V> = HashMap<K, V, BuildHasherDefault<FxHasher32>>;
|
||||||
|
pub type SmallString32 = smallstr::SmallString<[u8; 32]>;
|
||||||
|
|
||||||
|
#[cfg(target_os = "linux")]
|
||||||
|
#[global_allocator]
|
||||||
|
static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;
|
||||||
|
|
||||||
|
#[derive(Debug, StructOpt)]
|
||||||
|
#[structopt(name = "mm-indexer", about = "The server side of the daugt project.")]
|
||||||
|
struct Opt {
|
||||||
|
/// The database path where the database is located.
|
||||||
|
/// It is created if it doesn't already exist.
|
||||||
|
#[structopt(long = "db", parse(from_os_str))]
|
||||||
|
database: PathBuf,
|
||||||
|
|
||||||
|
/// Files to index in parallel.
|
||||||
|
files_to_index: Vec<PathBuf>,
|
||||||
|
}
|
||||||
|
|
||||||
|
fn union_bitpacked_postings_ids(_key: &[u8], old_value: Option<&[u8]>, new_value: &[u8]) -> Option<Vec<u8>> {
|
||||||
|
if old_value.is_none() {
|
||||||
|
return Some(new_value.to_vec())
|
||||||
|
}
|
||||||
|
|
||||||
|
let old_value = old_value.unwrap_or_default();
|
||||||
|
let old_value = CodecBitPacker4xSorted::bytes_decode(&old_value).unwrap();
|
||||||
|
let new_value = CodecBitPacker4xSorted::bytes_decode(&new_value).unwrap();
|
||||||
|
|
||||||
|
let old_set = SetBuf::new(old_value).unwrap();
|
||||||
|
let new_set = SetBuf::new(new_value).unwrap();
|
||||||
|
|
||||||
|
let result = sdset::duo::Union::new(&old_set, &new_set).into_set_buf();
|
||||||
|
let compressed = CodecBitPacker4xSorted::bytes_encode(&result).unwrap();
|
||||||
|
|
||||||
|
Some(compressed)
|
||||||
|
}
|
||||||
|
|
||||||
|
fn union_words_fst(key: &[u8], old_value: Option<&[u8]>, new_value: &[u8]) -> Option<Vec<u8>> {
|
||||||
|
if key != b"words-fst" { unimplemented!() }
|
||||||
|
|
||||||
|
let old_value = match old_value {
|
||||||
|
Some(old_value) => old_value,
|
||||||
|
None => return Some(new_value.to_vec()),
|
||||||
|
};
|
||||||
|
|
||||||
|
eprintln!("old_words size: {}", old_value.len());
|
||||||
|
eprintln!("new_words size: {}", new_value.len());
|
||||||
|
|
||||||
|
let old_words = fst::Set::new(old_value).unwrap();
|
||||||
|
let new_words = fst::Set::new(new_value).unwrap();
|
||||||
|
|
||||||
|
// Do an union of the old and the new set of words.
|
||||||
|
let op = old_words.op().add(new_words.into_stream()).r#union();
|
||||||
|
let mut build = fst::SetBuilder::memory();
|
||||||
|
build.extend_stream(op.into_stream()).unwrap();
|
||||||
|
|
||||||
|
Some(build.into_inner().unwrap())
|
||||||
|
}
|
||||||
|
|
||||||
|
fn alphanumeric_tokens(string: &str) -> impl Iterator<Item = &str> {
|
||||||
|
let is_alphanumeric = |s: &&str| s.chars().next().map_or(false, char::is_alphanumeric);
|
||||||
|
string.linear_group_by_key(|c| c.is_alphanumeric()).filter(is_alphanumeric)
|
||||||
|
}
|
||||||
|
|
||||||
|
fn index_csv(tid: usize, db: sled::Db, mut rdr: csv::Reader<File>) -> anyhow::Result<usize> {
|
||||||
|
const MAX_POSITION: usize = 1000;
|
||||||
|
const MAX_ATTRIBUTES: usize = u32::max_value() as usize / MAX_POSITION;
|
||||||
|
|
||||||
|
let main = &*db;
|
||||||
|
let postings_ids = db.open_tree("postings-ids")?;
|
||||||
|
let documents = db.open_tree("documents")?;
|
||||||
|
|
||||||
|
let mut document = csv::StringRecord::new();
|
||||||
|
let mut new_postings_ids = FastMap4::default();
|
||||||
|
let mut new_words = BTreeSet::default();
|
||||||
|
let mut number_of_documents = 0;
|
||||||
|
|
||||||
|
// Write the headers into a Vec of bytes.
|
||||||
|
let headers = rdr.headers()?;
|
||||||
|
let mut writer = csv::WriterBuilder::new().has_headers(false).from_writer(Vec::new());
|
||||||
|
writer.write_byte_record(headers.as_byte_record())?;
|
||||||
|
let headers = writer.into_inner()?;
|
||||||
|
|
||||||
|
if let Some(old_headers) = main.insert("headers", headers.as_slice())? {
|
||||||
|
ensure!(old_headers == headers, "headers differs from the previous ones");
|
||||||
|
}
|
||||||
|
|
||||||
|
while rdr.read_record(&mut document)? {
|
||||||
|
let document_id = db.generate_id()?;
|
||||||
|
let document_id = u32::try_from(document_id).context("Generated id is too big")?;
|
||||||
|
|
||||||
|
for (_attr, content) in document.iter().enumerate().take(MAX_ATTRIBUTES) {
|
||||||
|
for (_pos, word) in alphanumeric_tokens(&content).enumerate().take(MAX_POSITION) {
|
||||||
|
new_postings_ids.entry(SmallString32::from(word)).or_insert_with(BpVec::new).push(document_id);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// We write the document in the database.
|
||||||
|
let mut writer = csv::WriterBuilder::new().has_headers(false).from_writer(Vec::new());
|
||||||
|
writer.write_byte_record(document.as_byte_record())?;
|
||||||
|
let document = writer.into_inner()?;
|
||||||
|
documents.insert(document_id.to_be_bytes(), document)?;
|
||||||
|
|
||||||
|
number_of_documents += 1;
|
||||||
|
if number_of_documents % 100000 == 0 {
|
||||||
|
let postings_ids_size = new_postings_ids.iter().map(|(_, v)| v.capacity() * 4).sum::<usize>();
|
||||||
|
eprintln!("{}, documents seen {}, postings size {}",
|
||||||
|
tid, number_of_documents, postings_ids_size);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
eprintln!("Start collecting the postings lists and words");
|
||||||
|
|
||||||
|
// We compute and store the postings list into the DB.
|
||||||
|
for (word, new_ids) in new_postings_ids {
|
||||||
|
let new_ids = SetBuf::from_dirty(new_ids.to_vec());
|
||||||
|
let compressed = CodecBitPacker4xSorted::bytes_encode(&new_ids)
|
||||||
|
.context("error while compressing using CodecBitPacker4xSorted")?;
|
||||||
|
|
||||||
|
postings_ids.merge(word.as_bytes(), compressed)?;
|
||||||
|
|
||||||
|
new_words.insert(word);
|
||||||
|
}
|
||||||
|
|
||||||
|
eprintln!("Finished collecting the postings lists and words");
|
||||||
|
|
||||||
|
eprintln!("Start merging the words-fst");
|
||||||
|
|
||||||
|
let new_words_fst = fst::Set::from_iter(new_words.iter().map(|s| s.as_str()))?;
|
||||||
|
drop(new_words);
|
||||||
|
main.merge("words-fst", new_words_fst.as_fst().as_bytes())?;
|
||||||
|
|
||||||
|
eprintln!("Finished merging the words-fst");
|
||||||
|
|
||||||
|
Ok(number_of_documents)
|
||||||
|
}
|
||||||
|
|
||||||
|
fn main() -> anyhow::Result<()> {
|
||||||
|
let opt = Opt::from_args();
|
||||||
|
|
||||||
|
let db = sled::open(opt.database)?;
|
||||||
|
let main = &*db;
|
||||||
|
|
||||||
|
// Setup the merge operators
|
||||||
|
main.set_merge_operator(union_words_fst);
|
||||||
|
let postings_ids = db.open_tree("postings-ids")?;
|
||||||
|
postings_ids.set_merge_operator(union_bitpacked_postings_ids);
|
||||||
|
// ...
|
||||||
|
let _documents = db.open_tree("documents")?;
|
||||||
|
|
||||||
|
let res = opt.files_to_index
|
||||||
|
.into_par_iter()
|
||||||
|
.enumerate()
|
||||||
|
.map(|(tid, path)| {
|
||||||
|
let rdr = csv::Reader::from_path(path)?;
|
||||||
|
index_csv(tid, db.clone(), rdr)
|
||||||
|
})
|
||||||
|
.try_reduce(|| 0, |a, b| Ok(a + b));
|
||||||
|
|
||||||
|
println!("{:?}", res);
|
||||||
|
|
||||||
|
Ok(())
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue
Block a user