github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/pkg/fsutil/preallocate_other.go (about)

     1  // Copyright 2022 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  //
    14  //go:build !linux
    15  
    16  package fsutil
    17  
    18  import "os"
    19  
    20  // PreAllocate can allocate disk space beforehand in case of ENOSPC error occurs
    21  // when writing a file, which is not uncommon for a rigorous redolog/WAL design.
    22  // Besides, pre-allocating disk space can reduce the overhead of file metadata updating.
    23  func PreAllocate(f *os.File, size int64) error {
    24  	// if the OS is not linux, use truncate as a fallback.
    25  	return f.Truncate(size)
    26  }