moraine 0.7.0

A SlateDB-backed catalog for DuckLake
Documentation 
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

//! Measured in-memory object storage with optional synthetic GET latency.

use std::{
    fmt,
    sync::{
        Arc,
        atomic::{AtomicBool, AtomicU64, Ordering},
    },
    time::Duration,
};

use futures::stream::BoxStream;
use object_store::{
    CopyOptions, GetOptions, GetResult, ListResult, MultipartUpload, ObjectMeta, ObjectStore,
    PutMultipartOptions, PutOptions, PutPayload, PutResult, memory::InMemory, path::Path,
};
use tokio::sync::Semaphore;

#[derive(Debug)]
pub(super) struct Transport {
    pub(super) coalescing: AtomicBool,
    inner: InMemory,
    permits: Semaphore,
    limited: AtomicBool,
    delay_ms: AtomicU64,
    gets: AtomicU64,
    bytes: AtomicU64,
    active: AtomicU64,
    peak: AtomicU64,
}

impl Transport {
    pub(super) fn new() -> Arc<Self> {
        Arc::new(Self {
            coalescing: AtomicBool::new(false),
            inner: InMemory::new(),
            permits: Semaphore::new(32),
            limited: AtomicBool::new(false),
            delay_ms: AtomicU64::new(0),
            gets: AtomicU64::new(0),
            bytes: AtomicU64::new(0),
            active: AtomicU64::new(0),
            peak: AtomicU64::new(0),
        })
    }

    pub(super) fn configure(&self, delay_ms: u64, limited: bool) {
        self.delay_ms.store(delay_ms, Ordering::Relaxed);
        self.limited.store(limited, Ordering::Relaxed);
    }

    pub(super) fn reset(&self) {
        assert_eq!(self.active.load(Ordering::Relaxed), 0);
        self.gets.store(0, Ordering::Relaxed);
        self.bytes.store(0, Ordering::Relaxed);
        self.peak.store(0, Ordering::Relaxed);
    }

    pub(super) async fn settle(&self) {
        tokio::time::timeout(Duration::from_secs(10), async {
            let mut quiet = 0;
            while quiet < 3 {
                tokio::time::sleep(Duration::from_millis(1)).await;
                quiet = if self.active.load(Ordering::Relaxed) == 0 {
                    quiet + 1
                } else {
                    0
                };
            }
        })
        .await
        .unwrap();
    }

    pub(super) fn counters(&self) -> (u64, u64, u64) {
        (
            self.gets.load(Ordering::Relaxed),
            self.bytes.load(Ordering::Relaxed),
            self.peak.load(Ordering::Relaxed),
        )
    }
}

impl fmt::Display for Transport {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "probe benchmark transport")
    }
}

struct Active<'a>(&'a AtomicU64);
impl Drop for Active<'_> {
    fn drop(&mut self) {
        self.0.fetch_sub(1, Ordering::Relaxed);
    }
}

#[async_trait::async_trait]
impl ObjectStore for Transport {
    async fn put_opts(
        &self,
        location: &Path,
        payload: PutPayload,
        opts: PutOptions,
    ) -> object_store::Result<PutResult> {
        self.inner.put_opts(location, payload, opts).await
    }

    async fn put_multipart_opts(
        &self,
        location: &Path,
        opts: PutMultipartOptions,
    ) -> object_store::Result<Box<dyn MultipartUpload>> {
        self.inner.put_multipart_opts(location, opts).await
    }

    async fn get_opts(&self, location: &Path, opts: GetOptions) -> object_store::Result<GetResult> {
        self.gets.fetch_add(1, Ordering::Relaxed);
        let active = self.active.fetch_add(1, Ordering::Relaxed) + 1;
        self.peak.fetch_max(active, Ordering::Relaxed);
        let _active = Active(&self.active);
        let _permit = if self.limited.load(Ordering::Relaxed) {
            Some(self.permits.acquire().await.unwrap())
        } else {
            None
        };
        let delay = self.delay_ms.load(Ordering::Relaxed);
        if delay > 0 {
            tokio::time::sleep(Duration::from_millis(delay)).await;
        }
        let result = self.inner.get_opts(location, opts).await?;
        self.bytes
            .fetch_add(result.range.end - result.range.start, Ordering::Relaxed);
        Ok(result)
    }

    fn delete_stream(
        &self,
        locations: BoxStream<'static, object_store::Result<Path>>,
    ) -> BoxStream<'static, object_store::Result<Path>> {
        self.inner.delete_stream(locations)
    }

    fn list(&self, prefix: Option<&Path>) -> BoxStream<'static, object_store::Result<ObjectMeta>> {
        self.inner.list(prefix)
    }

    async fn list_with_delimiter(&self, prefix: Option<&Path>) -> object_store::Result<ListResult> {
        self.inner.list_with_delimiter(prefix).await
    }

    async fn copy_opts(
        &self,
        from: &Path,
        to: &Path,
        opts: CopyOptions,
    ) -> object_store::Result<()> {
        self.inner.copy_opts(from, to, opts).await
    }
}