github.com/m3db/m3@v1.5.1-0.20231129193456-75a402aa583b/src/dbnode/persist/fs/fs.go (about)

     1  // Copyright (c) 2016 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package fs
    22  
    23  const (
    24  	snapshotFilePrefix = "snapshot"
    25  
    26  	// InfoFileSuffix is the suffix of info file.
    27  	InfoFileSuffix = "info"
    28  
    29  	// DigestFileSuffix is the suffix of digest file.
    30  	DigestFileSuffix = "digest"
    31  
    32  	// CheckpointFileSuffix is the suffix of checkpoint file.
    33  	CheckpointFileSuffix = "checkpoint"
    34  
    35  	indexFileSuffix          = "index"
    36  	summariesFileSuffix      = "summaries"
    37  	bloomFilterFileSuffix    = "bloomfilter"
    38  	dataFileSuffix           = "data"
    39  	metadataFileSuffix       = "metadata"
    40  	filesetFilePrefix        = "fileset"
    41  	commitLogFilePrefix      = "commitlog"
    42  	segmentFileSetFilePrefix = "segment"
    43  
    44  	fileSuffix              = ".db"
    45  	fileSuffixDelimeterRune = '.'
    46  
    47  	anyLowerCaseCharsPattern        = "[a-z]*"
    48  	anyNumbersPattern               = "[0-9]*"
    49  	anyLowerCaseCharsNumbersPattern = "[a-z0-9]*"
    50  
    51  	separator     = "-"
    52  	separatorRune = '-'
    53  
    54  	filesetFilePattern   = filesetFilePrefix + separator + anyNumbersPattern + separator + anyLowerCaseCharsPattern + fileSuffix
    55  	commitLogFilePattern = commitLogFilePrefix + separator + anyNumbersPattern + separator + anyNumbersPattern + fileSuffix
    56  )