seaweedfs/weed/filer/filechunks_read_test.go

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package filer
import (
"fmt"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
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"math/rand"
"testing"
)
func TestReadResolvedChunks(t *testing.T) {
chunks := []*filer_pb.FileChunk{
{
FileId: "a",
Offset: 0,
Size: 100,
ModifiedTsNs: 1,
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},
{
FileId: "b",
Offset: 50,
Size: 100,
ModifiedTsNs: 2,
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},
{
FileId: "c",
Offset: 200,
Size: 50,
ModifiedTsNs: 3,
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},
{
FileId: "d",
Offset: 250,
Size: 50,
ModifiedTsNs: 4,
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},
{
FileId: "e",
Offset: 175,
Size: 100,
ModifiedTsNs: 5,
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},
}
visibles := readResolvedChunks(chunks)
for _, visible := range visibles {
fmt.Printf("[%d,%d) %s %d\n", visible.start, visible.stop, visible.fileId, visible.modifiedTsNs)
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}
}
func TestRandomizedReadResolvedChunks(t *testing.T) {
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var limit int64 = 1024 * 1024
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array := make([]int64, limit)
var chunks []*filer_pb.FileChunk
for ts := int64(0); ts < 1024; ts++ {
x := rand.Int63n(limit)
y := rand.Int63n(limit)
size := x - y
if size < 0 {
size = -size
}
if size > 1024 {
size = 1024
}
start := x
if start > y {
start = y
}
chunks = append(chunks, randomWrite(array, start, size, ts))
}
visibles := readResolvedChunks(chunks)
for _, visible := range visibles {
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for i := visible.start; i < visible.stop; i++ {
if array[i] != visible.modifiedTsNs {
t.Errorf("position %d expected ts %d actual ts %d", i, array[i], visible.modifiedTsNs)
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}
}
}
// fmt.Printf("visibles %d", len(visibles))
}
func randomWrite(array []int64, start int64, size int64, ts int64) *filer_pb.FileChunk {
for i := start; i < start+size; i++ {
array[i] = ts
}
// fmt.Printf("write [%d,%d) %d\n", start, start+size, ts)
return &filer_pb.FileChunk{
FileId: "",
Offset: start,
Size: uint64(size),
ModifiedTsNs: ts,
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}
}
func TestSequentialReadResolvedChunks(t *testing.T) {
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var chunkSize int64 = 1024 * 1024 * 2
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var chunks []*filer_pb.FileChunk
for ts := int64(0); ts < 13; ts++ {
chunks = append(chunks, &filer_pb.FileChunk{
FileId: "",
Offset: chunkSize * ts,
Size: uint64(chunkSize),
ModifiedTsNs: 1,
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})
}
visibles := readResolvedChunks(chunks)
fmt.Printf("visibles %d", len(visibles))
}
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func TestActualReadResolvedChunks(t *testing.T) {
chunks := []*filer_pb.FileChunk{
{
FileId: "5,e7b96fef48",
Offset: 0,
Size: 2097152,
ModifiedTsNs: 1634447487595823000,
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},
{
FileId: "5,e5562640b9",
Offset: 2097152,
Size: 2097152,
ModifiedTsNs: 1634447487595826000,
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},
{
FileId: "5,df033e0fe4",
Offset: 4194304,
Size: 2097152,
ModifiedTsNs: 1634447487595827000,
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},
{
FileId: "7,eb08148a9b",
Offset: 6291456,
Size: 2097152,
ModifiedTsNs: 1634447487595827000,
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},
{
FileId: "7,e0f92d1604",
Offset: 8388608,
Size: 2097152,
ModifiedTsNs: 1634447487595828000,
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},
{
FileId: "7,e33cb63262",
Offset: 10485760,
Size: 2097152,
ModifiedTsNs: 1634447487595828000,
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},
{
FileId: "5,ea98e40e93",
Offset: 12582912,
Size: 2097152,
ModifiedTsNs: 1634447487595829000,
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},
{
FileId: "5,e165661172",
Offset: 14680064,
Size: 2097152,
ModifiedTsNs: 1634447487595829000,
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},
{
FileId: "3,e692097486",
Offset: 16777216,
Size: 2097152,
ModifiedTsNs: 1634447487595830000,
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},
{
FileId: "3,e28e2e3cbd",
Offset: 18874368,
Size: 2097152,
ModifiedTsNs: 1634447487595830000,
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},
{
FileId: "3,e443974d4e",
Offset: 20971520,
Size: 2097152,
ModifiedTsNs: 1634447487595830000,
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},
{
FileId: "2,e815bed597",
Offset: 23068672,
Size: 2097152,
ModifiedTsNs: 1634447487595831000,
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},
{
FileId: "5,e94715199e",
Offset: 25165824,
Size: 1974736,
ModifiedTsNs: 1634447487595832000,
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},
}
visibles := readResolvedChunks(chunks)
for _, visible := range visibles {
fmt.Printf("[%d,%d) %s %d\n", visible.start, visible.stop, visible.fileId, visible.modifiedTsNs)
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}
}