mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-12-04 12:59:23 +08:00
95 lines
2.7 KiB
Go
95 lines
2.7 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
|
|
// with the License. You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software distributed under the License
|
|
// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
|
|
// or implied. See the License for the specific language governing permissions and limitations under the License.
|
|
|
|
package storage
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"fmt"
|
|
"strconv"
|
|
|
|
"github.com/milvus-io/milvus/internal/kv"
|
|
)
|
|
|
|
// GetBinlogSize get size of a binlog file.
|
|
// normal binlog file, error = nil;
|
|
// key not exist, size = 0, error = nil;
|
|
// key not in binlog format, size = (a not accurate number), error != nil;
|
|
// failed to read event reader, size = (a not accurate number), error != nil;
|
|
func GetBinlogSize(kv kv.DataKV, key string) (int64, error) {
|
|
|
|
return kv.GetSize(key)
|
|
}
|
|
|
|
// EstimateMemorySize get approximate memory size of a binlog file.
|
|
// 1, key not exist, size = 0, error != nil;
|
|
// 2, failed to read event header, size = 0, error != nil;
|
|
// 3, invalid event length, size = 0, error != nil;
|
|
// 4, failed to read descriptor event, size = 0, error != nil;
|
|
// 5, original_size not in extra, size = 0, error != nil;
|
|
// 6, original_size not in int format, size = 0, error != nil;
|
|
// 7, normal binlog with original_size, return original_size, error = nil;
|
|
func EstimateMemorySize(kv kv.DataKV, key string) (int64, error) {
|
|
total := int64(0)
|
|
|
|
header := &eventHeader{}
|
|
headerSize := binary.Size(header)
|
|
|
|
startPos := binary.Size(MagicNumber)
|
|
endPos := startPos + headerSize
|
|
|
|
// get header
|
|
headerContent, err := kv.LoadPartial(key, int64(startPos), int64(endPos))
|
|
if err != nil {
|
|
return total, err
|
|
}
|
|
|
|
buffer := bytes.NewBuffer(headerContent)
|
|
|
|
header, err = readEventHeader(buffer)
|
|
if err != nil {
|
|
return total, err
|
|
}
|
|
|
|
if header.EventLength <= 0 {
|
|
return total, fmt.Errorf("key %v not in binlog format", key)
|
|
}
|
|
|
|
desc := &descriptorEvent{}
|
|
endPos = startPos + int(header.EventLength)
|
|
descContent, err := kv.LoadPartial(key, int64(startPos), int64(endPos))
|
|
if err != nil {
|
|
return total, err
|
|
}
|
|
|
|
buffer = bytes.NewBuffer(descContent)
|
|
|
|
desc, err = ReadDescriptorEvent(buffer)
|
|
if err != nil {
|
|
return total, err
|
|
}
|
|
|
|
sizeStr, ok := desc.Extras[originalSizeKey]
|
|
if !ok {
|
|
return total, fmt.Errorf("key %v not in extra information", originalSizeKey)
|
|
}
|
|
|
|
size, err := strconv.Atoi(fmt.Sprintf("%v", sizeStr))
|
|
if err != nil {
|
|
return total, fmt.Errorf("%v not in valid format, value: %v", originalSizeKey, sizeStr)
|
|
}
|
|
|
|
total = int64(size)
|
|
|
|
return total, nil
|
|
}
|