1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
use std::os::unix::io::RawFd;
use nix::unistd::{close, mkdir, unlinkat, UnlinkatFlags, ftruncate};
use nix::fcntl::{open, openat, OFlag, fallocate, FallocateFlags};
use nix::sys::{stat::Mode, uio::{pwrite, pread}};
use rand::{Rng, seq::SliceRandom};
use libc::off_t;
use growthring::wal::{WALFile, WALStore, WALPos, WALBytes, WALLoader, WALWriter, WALRingId};
struct WALFileTest {
filename: String,
fd: RawFd,
}
impl WALFileTest {
fn new(rootfd: RawFd, filename: &str) -> Self {
let fd = openat(rootfd, filename,
OFlag::O_CREAT | OFlag::O_RDWR,
Mode::S_IRUSR | Mode::S_IWUSR).unwrap();
let filename = filename.to_string();
WALFileTest {
filename,
fd,
}
}
}
impl Drop for WALFileTest {
fn drop(&mut self) {
close(self.fd).unwrap();
}
}
impl WALFile for WALFileTest {
fn allocate(&self, offset: WALPos, length: usize) -> Result<(), ()> {
println!("{}.allocate(offset=0x{:x}, end=0x{:x})", self.filename, offset, offset + length as u64);
fallocate(self.fd,
FallocateFlags::FALLOC_FL_ZERO_RANGE,
offset as off_t, length as off_t).and_then(|_| Ok(())).or_else(|_| Err(()))
}
fn truncate(&self, length: usize) -> Result<(), ()> {
println!("{}.truncate(length={})", self.filename, length);
ftruncate(self.fd, length as off_t).or_else(|_| Err(()))
}
fn write(&self, offset: WALPos, data: WALBytes) {
println!("{}.write(offset=0x{:x}, end=0x{:x}, data=0x{})",
self.filename, offset, offset + data.len() as u64, hex::encode(&data));
pwrite(self.fd, &*data, offset as off_t).unwrap();
}
fn read(&self, offset: WALPos, length: usize) -> WALBytes {
let mut buff = Vec::new();
buff.resize(length, 0);
pread(self.fd, &mut buff[..], offset as off_t).unwrap();
buff.into_boxed_slice()
}
}
struct WALStoreTest {
rootfd: RawFd,
rootpath: String
}
impl WALStoreTest {
fn new(wal_dir: &str, truncate: bool) -> Self {
let rootpath = wal_dir.to_string();
if truncate {
let _ = std::fs::remove_dir_all(wal_dir);
}
match mkdir(wal_dir, Mode::S_IRUSR | Mode::S_IWUSR | Mode::S_IXUSR) {
Err(e) => if truncate { panic!("error while creating directory: {}", e) },
Ok(_) => ()
}
let rootfd = match open(wal_dir, OFlag::O_DIRECTORY | OFlag::O_PATH, Mode::empty()) {
Ok(fd) => fd,
Err(_) => panic!("error while opening the DB")
};
WALStoreTest { rootfd, rootpath }
}
}
impl Drop for WALStoreTest {
fn drop(&mut self) {
close(self.rootfd).unwrap();
}
}
impl WALStore for WALStoreTest {
fn open_file(&self, filename: &str, touch: bool) -> Option<Box<dyn WALFile>> {
println!("open_file(filename={}, touch={})", filename, touch);
let filename = filename.to_string();
Some(Box::new(WALFileTest::new(self.rootfd, &filename)))
}
fn remove_file(&self, filename: &str) -> Result<(), ()> {
println!("remove_file(filename={})", filename);
unlinkat(Some(self.rootfd), filename, UnlinkatFlags::NoRemoveDir).or_else(|_| Err(()))
}
fn enumerate_files(&self) -> Box<[String]> {
println!("enumerate_files()");
let mut logfiles = Vec::new();
for fname in std::fs::read_dir(&self.rootpath).unwrap() {
logfiles.push(fname.unwrap().file_name().into_string().unwrap())
}
logfiles.into_boxed_slice()
}
fn apply_payload(&self, payload: WALBytes) {
println!("apply_payload(payload={})", std::str::from_utf8(&payload).unwrap())
}
}
fn test(records: Vec<String>, wal: &mut WALWriter<WALStoreTest>) -> Box<[WALRingId]> {
let records: Vec<WALBytes> = records.into_iter().map(|s| s.into_bytes().into_boxed_slice()).collect();
let ret = wal.grow(&records);
for ring_id in ret.iter() {
println!("got ring id: {:?}", ring_id);
}
ret
}
fn main() {
let mut rng = rand::thread_rng();
let store = WALStoreTest::new("./wal_demo1", true);
let mut wal = WALLoader::new(store, 9, 8, 1000).recover();
for _ in 0..3 {
test(["hi", "hello", "lol"].iter().map(|s| s.to_string()).collect::<Vec<String>>(), &mut wal);
}
for _ in 0..3 {
test(vec!["a".repeat(10), "b".repeat(100), "c".repeat(1000)], &mut wal);
}
let store = WALStoreTest::new("./wal_demo1", false);
let mut wal = WALLoader::new(store, 9, 8, 1000).recover();
for _ in 0..3 {
test(vec!["a".repeat(10), "b".repeat(100), "c".repeat(300), "d".repeat(400)], &mut wal);
}
let store = WALStoreTest::new("./wal_demo1", false);
let mut wal = WALLoader::new(store, 9, 8, 1000).recover();
for _ in 0..3 {
let mut ids = Vec::new();
for _ in 0..3 {
let mut records = Vec::new();
for _ in 0..100 {
records.push("a".repeat(rng.gen_range(1, 10)))
}
for id in test(records, &mut wal).iter() {
ids.push(*id)
}
}
ids.shuffle(&mut rng);
for e in ids.chunks(20) {
println!("peel(20)");
wal.peel(e);
}
}
}
|