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OceanFotSea
OceanFot
authored and
Sea
committed
1. 修改了底层读取RDB文件时的处理方式（ core/utils.go ）： readByte 和 readFull 不再直接从磁盘读取数据，而是从 Decoder.cache 中读取； Decoder.cache 每次固定从磁盘取 1MiB 的数据，如果已读完则读取下一个 1MiB （大约降低了99%的IOPS）
2. 读取磁盘时增加了限流器，并允许执行时指定对应参数值，默认 1024次/s（等同于1024MiB/s） 3. Decoder 中增加 opCodeSlotInfo 类型：感谢 sjet47 HDT3213#61 4. 升级了go的版本和相关依赖的版本
1 parent 310e40d commit f2efa44

5 files changed

Lines changed: 215 additions & 42 deletions

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‎cmd.go‎

Lines changed: 18 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -6,6 +6,7 @@ import (
66
"os"
77
"strings"
88

9+
"github.com/hdt3213/rdb/core"
910
"github.com/hdt3213/rdb/helper"
1011
)
1112

@@ -32,6 +33,8 @@ Options:
3233
-concurrent The number of concurrent json converters. 4 by default.
3334
-show-global-meta Show global meta likes redis-verion/ctime/functions
3435
-no-expired filter expired keys(deprecated, please use 'expire' option)
36+
-ioLimiterLimit IO read limiter( MiB/s ), default 1024 - ioLimiter.SetLimit(rate.Limit(ioLimiterLimit))
37+
-ioLimiterBurst ioLimiter.SetBurst(ioLimiterBurst), default 1024
3538
3639
Examples:
3740
parameters between '[' and ']' is optional
@@ -75,6 +78,8 @@ func main() {
7578
var concurrent int
7679
var showGlobalMeta bool
7780
var err error
81+
var ioLimiterLimit int
82+
var ioLimiterBurst int
7883
flagSet.StringVar(&cmd, "c", "", "command for rdb: json")
7984
flagSet.StringVar(&output, "o", "", "output file path")
8085
flagSet.IntVar(&n, "n", 0, "")
@@ -87,6 +92,8 @@ func main() {
8792
flagSet.StringVar(&sizeExpr, "size", "", "size filter expression")
8893
flagSet.BoolVar(&noExpired, "no-expired", false, "filter expired keys(deprecated, please use expire)")
8994
flagSet.BoolVar(&showGlobalMeta, "show-global-meta", false, "Show global meta likes redis-verion/ctime/functions")
95+
flagSet.IntVar(&ioLimiterLimit, "ioLimiterLimit", 0, "IO read limiter( MiB/s )")
96+
flagSet.IntVar(&ioLimiterBurst, "ioLimiterBurst", 0, "ioLimiter.SetBurst")
9097
_ = flagSet.Parse(os.Args[1:]) // ExitOnError
9198
src := flagSet.Arg(0)
9299

@@ -118,6 +125,15 @@ func main() {
118125
if showGlobalMeta {
119126
options = append(options, helper.WithGlobalMeta())
120127
}
128+
// ioLimiter
129+
if ioLimiterLimit > 0 {
130+
fmt.Printf("Update IoLimiter.Limit to %v\n", ioLimiterLimit)
131+
core.UpdateIoLimiterLimit(ioLimiterLimit)
132+
}
133+
if ioLimiterBurst > 0 {
134+
fmt.Printf("Update IoLimiter.Burst to %v\n", ioLimiterBurst)
135+
core.UpdateIoLimiterBurst(ioLimiterBurst)
136+
}
121137

122138
var outputFile *os.File
123139
if output == "" {
@@ -158,4 +174,6 @@ func main() {
158174
fmt.Printf("error: %v\n", err)
159175
return
160176
}
177+
178+
fmt.Printf("ReadCount = %v\n", core.ReadCount)
161179
}

‎core/decoder.go‎

Lines changed: 35 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -9,6 +9,8 @@ import (
99
"fmt"
1010
"io"
1111
"strconv"
12+
"sync"
13+
"sync/atomic"
1214
"time"
1315

1416
"github.com/hdt3213/rdb/memprofiler"
@@ -18,19 +20,31 @@ import (
1820
// Decoder is an instance of rdb parsing process
1921
type Decoder struct {
2022
input *bufio.Reader
21-
readCount int
23+
readCount int64
2224
buffer []byte
25+
// to reduce disk IOPS
26+
cache []byte
27+
// Current Read Offset
28+
cachePos atomic.Uint32
29+
// Effective length of `cache`
30+
cacheLen atomic.Uint32
31+
// lock for real IO operations
32+
refillMu sync.Mutex
2333

2434
withSpecialOpCode bool
2535
withSpecialTypes map[string]ModuleTypeHandleFunc
2636
}
2737

38+
// cacheSize 1MB
39+
const cacheSize = 1024 * 1024
40+
2841
// NewDecoder creates a new RDB decoder
2942
func NewDecoder(reader io.Reader) *Decoder {
3043
parser := new(Decoder)
3144
parser.input = bufio.NewReader(reader)
3245
parser.buffer = make([]byte, 8)
3346
parser.withSpecialTypes = make(map[string]ModuleTypeHandleFunc)
47+
parser.cache = make([]byte, cacheSize)
3448
return parser
3549
}
3650

@@ -54,7 +68,8 @@ const (
5468
)
5569

5670
const (
57-
opCodeFunction = 245
71+
opCodeSlotInfo = 244 /* Individual slot info, such as slot id and size (cluster mode only). */
72+
opCodeFunction = 245 /* function library data */
5873
opCodeModuleAux = 247 /* Module auxiliary data. */
5974
opCodeIdle = 248 /* LRU idle time. */
6075
opCodeFreq = 249 /* LFU frequency. */
@@ -466,6 +481,23 @@ func (dec *Decoder) parse(cb func(object model.RedisObject) bool) error {
466481
}
467482
}
468483
continue
484+
} else if b == opCodeSlotInfo {
485+
// slot id
486+
_, _, err = dec.readLength()
487+
if err != nil {
488+
return err
489+
}
490+
// slot size
491+
_, _, err = dec.readLength()
492+
if err != nil {
493+
return err
494+
}
495+
// expires slot size
496+
_, _, err = dec.readLength()
497+
if err != nil {
498+
return err
499+
}
500+
continue
469501
}
470502
key, err := dec.readString()
471503
if err != nil {
@@ -511,6 +543,6 @@ func (dec *Decoder) Parse(cb func(object model.RedisObject) bool) (err error) {
511543
return dec.parse(cb)
512544
}
513545

514-
func (dec *Decoder) GetReadCount() int {
546+
func (dec *Decoder) GetReadCount() int64 {
515547
return dec.readCount
516548
}

‎core/utils.go‎

Lines changed: 129 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,13 +1,43 @@
11
package core
22

33
import (
4+
"context"
45
"encoding/binary"
56
"errors"
7+
"fmt"
68
"io"
79
"math/rand"
10+
"sync/atomic"
811
"unsafe"
12+
13+
"golang.org/x/time/rate"
14+
)
15+
16+
var (
17+
// MiB/s
18+
initLimit = 1024
19+
// burst
20+
initBurst = 1024
21+
limiter = rate.NewLimiter(rate.Limit(initLimit), initBurst)
922
)
1023

24+
// IO read count
25+
var ReadCount int64 = 0
26+
27+
// UpdateIoLimiterLimit update limit
28+
func UpdateIoLimiterLimit(newLimit int) {
29+
if newLimit > 0 {
30+
limiter.SetLimit(rate.Limit(newLimit))
31+
}
32+
}
33+
34+
// UpdateIoLimiterBurst update burst
35+
func UpdateIoLimiterBurst(newBurst int) {
36+
if newBurst > 0 {
37+
limiter.SetBurst(newBurst)
38+
}
39+
}
40+
1141
func readBytes(buf []byte, cursor *int, size int) ([]byte, error) {
1242
if cursor == nil {
1343
return nil, errors.New("cursor is nil")
@@ -42,7 +72,8 @@ func readZipListLength(buf []byte, cursor *int) int {
4272
return size
4373
}
4474

45-
func (dec *Decoder) readByte() (byte, error) {
75+
// original code
76+
/*func (dec *Decoder) readByte() (byte, error) {
4677
b, err := dec.input.ReadByte()
4778
if err != nil {
4879
return 0, err
@@ -58,6 +89,103 @@ func (dec *Decoder) readFull(buf []byte) error {
5889
}
5990
dec.readCount += n
6091
return nil
92+
}*/
93+
94+
// readByte get 1 Byte from Decoder.cache
95+
func (dec *Decoder) readByte() (byte, error) {
96+
for {
97+
pos := dec.cachePos.Load()
98+
length := dec.cacheLen.Load()
99+
100+
if pos >= length {
101+
dec.refillMu.Lock()
102+
if dec.cachePos.Load() < dec.cacheLen.Load() {
103+
dec.refillMu.Unlock()
104+
continue
105+
}
106+
err := dec.refillCache()
107+
dec.refillMu.Unlock()
108+
if err != nil {
109+
return 0, err
110+
}
111+
continue
112+
}
113+
114+
if dec.cachePos.CompareAndSwap(pos, pos+1) {
115+
atomic.AddInt64(&dec.readCount, 1)
116+
return dec.cache[pos], nil
117+
}
118+
}
119+
}
120+
121+
// readFull get len(buf) Bytes from Decoder.cache
122+
func (dec *Decoder) readFull(buf []byte) error {
123+
need := len(buf)
124+
copied := 0
125+
126+
for copied < need {
127+
pos := dec.cachePos.Load()
128+
length := dec.cacheLen.Load()
129+
130+
if pos >= length {
131+
dec.refillMu.Lock()
132+
if dec.cachePos.Load() < dec.cacheLen.Load() {
133+
dec.refillMu.Unlock()
134+
continue
135+
}
136+
err := dec.refillCache()
137+
dec.refillMu.Unlock()
138+
if err != nil {
139+
if copied > 0 && err == io.EOF {
140+
return io.ErrUnexpectedEOF
141+
}
142+
return err
143+
}
144+
continue
145+
}
146+
147+
available := int(length - pos)
148+
toCopy := need - copied
149+
if toCopy > available {
150+
toCopy = available
151+
}
152+
153+
if dec.cachePos.CompareAndSwap(pos, pos+uint32(toCopy)) {
154+
copy(buf[copied:copied+toCopy], dec.cache[pos:pos+uint32(toCopy)])
155+
copied += toCopy
156+
atomic.AddInt64(&dec.readCount, int64(toCopy))
157+
}
158+
}
159+
return nil
160+
}
161+
162+
// refillCache read 1MiB from disk
163+
func (dec *Decoder) refillCache() error {
164+
// rate limiter
165+
if err := limiter.Wait(context.Background()); err != nil {
166+
return err
167+
}
168+
// count IO read
169+
atomic.AddInt64(&ReadCount, 1)
170+
// print log
171+
if ReadCount%100 == 0 {
172+
fmt.Printf("ReadCount = %v\n", ReadCount)
173+
}
174+
175+
n, err := dec.input.Read(dec.cache)
176+
177+
// eof
178+
if n == 0 && err == nil {
179+
return io.EOF
180+
}
181+
182+
if n > 0 {
183+
dec.cachePos.Store(0)
184+
dec.cacheLen.Store(uint32(n))
185+
return nil
186+
}
187+
188+
return err
61189
}
62190

63191
var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")

‎go.mod‎

Lines changed: 13 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -1,11 +1,18 @@
11
module github.com/hdt3213/rdb
22

3-
go 1.16
3+
go 1.25.0
44

55
require (
6-
github.com/bytedance/sonic v1.12.1
7-
github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
8-
github.com/klauspost/cpuid/v2 v2.2.8 // indirect
9-
golang.org/x/arch v0.9.0 // indirect
10-
golang.org/x/sys v0.24.0 // indirect
6+
github.com/bytedance/sonic v1.15.0
7+
golang.org/x/time v0.15.0
8+
)
9+
10+
require (
11+
github.com/bytedance/gopkg v0.1.4 // indirect
12+
github.com/bytedance/sonic/loader v0.5.1 // indirect
13+
github.com/cloudwego/base64x v0.1.6 // indirect
14+
github.com/klauspost/cpuid/v2 v2.3.0 // indirect
15+
github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
16+
golang.org/x/arch v0.26.0 // indirect
17+
golang.org/x/sys v0.43.0 // indirect
1118
)

‎go.sum‎

Lines changed: 20 additions & 32 deletions
Original file line numberDiff line numberDiff line change
@@ -1,48 +1,36 @@
1-
github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM=
2-
github.com/bytedance/sonic v1.8.7 h1:d3sry5vGgVq/OpgozRUNP6xBsSo0mtNdwliApw+SAMQ=
3-
github.com/bytedance/sonic v1.8.7/go.mod h1:i736AoUSYt75HyZLoJW9ERYxcy6eaN6h4BZXU064P/U=
4-
github.com/bytedance/sonic v1.12.1 h1:jWl5Qz1fy7X1ioY74WqO0KjAMtAGQs4sYnjiEBiyX24=
5-
github.com/bytedance/sonic v1.12.1/go.mod h1:B8Gt/XvtZ3Fqj+iSKMypzymZxw/FVwgIGKzMzT9r/rk=
6-
github.com/bytedance/sonic/loader v0.1.1/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU=
7-
github.com/bytedance/sonic/loader v0.2.0 h1:zNprn+lsIP06C/IqCHs3gPQIvnvpKbbxyXQP1iU4kWM=
8-
github.com/bytedance/sonic/loader v0.2.0/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU=
9-
github.com/chenzhuoyu/base64x v0.0.0-20211019084208-fb5309c8db06/go.mod h1:DH46F32mSOjUmXrMHnKwZdA8wcEefY7UVqBKYGjpdQY=
10-
github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 h1:qSGYFH7+jGhDF8vLC+iwCD4WpbV1EBDSzWkJODFLams=
11-
github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311/go.mod h1:b583jCggY9gE99b6G5LEC39OIiVsWj+R97kbl5odCEk=
12-
github.com/cloudwego/base64x v0.1.4 h1:jwCgWpFanWmN8xoIUHa2rtzmkd5J2plF/dnLS6Xd/0Y=
13-
github.com/cloudwego/base64x v0.1.4/go.mod h1:0zlkT4Wn5C6NdauXdJRhSKRlJvmclQ1hhJgA0rcu/8w=
14-
github.com/cloudwego/iasm v0.2.0 h1:1KNIy1I1H9hNNFEEH3DVnI4UujN+1zjpuk6gwHLTssg=
15-
github.com/cloudwego/iasm v0.2.0/go.mod h1:8rXZaNYT2n95jn+zTI1sDr+IgcD2GVs0nlbbQPiEFhY=
1+
github.com/bytedance/gopkg v0.1.4 h1:oZnQwnX82KAIWb7033bEwtxvTqXcYMxDBaQxo5JJHWM=
2+
github.com/bytedance/gopkg v0.1.4/go.mod h1:v1zWfPm21Fb+OsyXN2VAHdL6TBb2L88anLQgdyje6R4=
3+
github.com/bytedance/sonic v1.15.0 h1:/PXeWFaR5ElNcVE84U0dOHjiMHQOwNIx3K4ymzh/uSE=
4+
github.com/bytedance/sonic v1.15.0/go.mod h1:tFkWrPz0/CUCLEF4ri4UkHekCIcdnkqXw9VduqpJh0k=
5+
github.com/bytedance/sonic/loader v0.5.1 h1:Ygpfa9zwRCCKSlrp5bBP/b/Xzc3VxsAW+5NIYXrOOpI=
6+
github.com/bytedance/sonic/loader v0.5.1/go.mod h1:AR4NYCk5DdzZizZ5djGqQ92eEhCCcdf5x77udYiSJRo=
7+
github.com/cloudwego/base64x v0.1.6 h1:t11wG9AECkCDk5fMSoxmufanudBtJ+/HemLstXDLI2M=
8+
github.com/cloudwego/base64x v0.1.6/go.mod h1:OFcloc187FXDaYHvrNIjxSe8ncn0OOM8gEHfghB2IPU=
169
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
1710
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
1811
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
19-
github.com/klauspost/cpuid/v2 v2.0.9 h1:lgaqFMSdTdQYdZ04uHyN2d/eKdOMyi2YLSvlQIBFYa4=
20-
github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
21-
github.com/klauspost/cpuid/v2 v2.2.8 h1:+StwCXwm9PdpiEkPyzBXIy+M9KUb4ODm0Zarf1kS5BM=
22-
github.com/klauspost/cpuid/v2 v2.2.8/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
23-
github.com/knz/go-libedit v1.10.1/go.mod h1:MZTVkCWyz0oBc7JOWP3wNAzd002ZbM/5hgShxwh4x8M=
12+
github.com/klauspost/cpuid/v2 v2.3.0 h1:S4CRMLnYUhGeDFDqkGriYKdfoFlDnMtqTiI/sFzhA9Y=
13+
github.com/klauspost/cpuid/v2 v2.3.0/go.mod h1:hqwkgyIinND0mEev00jJYCxPNVRVXFQeu1XKlok6oO0=
2414
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
2515
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
2616
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
2717
github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
2818
github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
29-
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
19+
github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
3020
github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
3121
github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
32-
github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
33-
github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
22+
github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
23+
github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
24+
github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
3425
github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS4MhqMhdFk5YI=
3526
github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
36-
golang.org/x/arch v0.0.0-20210923205945-b76863e36670 h1:18EFjUmQOcUvxNYSkA6jO9VAiXCnxFY6NyDX0bHDmkU=
37-
golang.org/x/arch v0.0.0-20210923205945-b76863e36670/go.mod h1:5om86z9Hs0C8fWVUuoMHwpExlXzs5Tkyp9hOrfG7pp8=
38-
golang.org/x/arch v0.9.0 h1:ub9TgUInamJ8mrZIGlBG6/4TqWeMszd4N8lNorbrr6k=
39-
golang.org/x/arch v0.9.0/go.mod h1:FEVrYAQjsQXMVJ1nsMoVVXPZg6p2JE2mx8psSWTDQys=
40-
golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
41-
golang.org/x/sys v0.24.0 h1:Twjiwq9dn6R1fQcyiK+wQyHWfaz/BJB+YIpzU/Cv3Xg=
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golang.org/x/sys v0.24.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
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golang.org/x/arch v0.26.0 h1:jZ6dpec5haP/fUv1kLCbuJy6dnRrfX6iVK08lZBFpk4=
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golang.org/x/arch v0.26.0/go.mod h1:0X+GdSIP+kL5wPmpK7sdkEVTt2XoYP0cSjQSbZBwOi8=
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golang.org/x/sys v0.43.0 h1:Rlag2XtaFTxp19wS8MXlJwTvoh8ArU6ezoyFsMyCTNI=
30+
golang.org/x/sys v0.43.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
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golang.org/x/time v0.15.0 h1:bbrp8t3bGUeFOx08pvsMYRTCVSMk89u4tKbNOZbp88U=
32+
golang.org/x/time v0.15.0/go.mod h1:Y4YMaQmXwGQZoFaVFk4YpCt4FLQMYKZe9oeV/f4MSno=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
4434
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
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gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50=
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rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=

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