pelican server cache chaos truncate

pelican-server cache chaos truncate

Truncate a cached object’s on-disk data

Synopsis

Remove bytes from the end of one of a cached object’s on-disk chunk files, dropping trailing block(s). The cache detects the missing/short data on a cold read or during the data scan.

By default the last chunk is truncated by one block; use —chunk and —drop-bytes to control which chunk and how much is removed.

Examples: pelican cache chaos truncate pelican://my-federation/data/file.dat pelican cache chaos truncate /data/file.dat —drop-bytes 65536 pelican cache chaos truncate —instance <hash> —chunk 0


pelican-server cache chaos truncate <object-url> [flags]

Options


      --chunk int        Chunk index to truncate (default: the last chunk) (default -1)
      --drop-bytes int   Bytes to remove from the end of the chunk file (default: one block)
  -h, --help             help for truncate

Options inherited from parent commands


      --config string       config file (default is $HOME/.config/pelican/pelican.yaml)
  -d, --debug               Enable debug log messages
      --etag string         Select the object version by ETag (default: latest)
  -f, --federation string   Pelican federation to utilize
      --instance string     Select the object version by instance hash
      --json                Output in JSON format
  -L, --log string          Specified log output file
  -t, --token string        Path to admin token file (auto-generated if not provided)
      --version             Print the version and exit