HASHCREATE Command

HSI Version:

4.0.1.1 and higher

Purpose:

Create checksum hash for existing HPSS file(s)

Aliases:

None

Command Format:

hashcr[eate] [-A] [-C] [-F on|off] [-H type,] [-h] [-N] [-R] [-S] [-T on|off ] path … [<<MARKER]...

Options:

-A : enable auto-scheduling of retrievals for files that live on tape.

-C: cache purge option. If specified, purge files from HPSS disk cache after a successful hash create. Purging files from disk cache can help to optimize the use of this global HPSS resource when the files are not going to be fetched again for a long time.

-F on|off explicitly use or disable Local File Mover I/O, overriding the settings based upon file size and the global enable/disable flag from the hsirc file

-H type set case-insensitive checksum hash type to use (none,sha1,sha224,sha256,sha384,sha512, md5, crc32, adler32 (overrides hsirc and compile time options)

-h: symlink option. If specified, ignores HPSS symlink. If not set, reads through HPSS symlinks when reading files.

-N: disable auto-scheduling of retrievals (inverse of option -A). The normal default is to enable auto-scheduling in order to optimize tape mounts and tape positioning.

-R : [standard option]recursively create hash entries for files in the specified HPSS path(s)

-S : disable staging of the source file (attempts to read directly from tape)

-T on|off [future] explicitly use or disable Transfer Agent I/O.

-MARKER provides sh-style "here document" syntax for specifying filenames. Lines following the MARKER, which must be the last token on the line, contain pathname (which may include wildcards). The list is terminated by a line containing MARKER as the first token on the line.
See the examples below.

Keywords:

none

Usage Notes:

  • The -A option is usually the default, but may be disabled in the hsirc file

  • This command requires read access to the file in order to generate the hash checksum. Setting, updating or deleting an ACL can be done by the object's owner without requiring any other special permission. For all others, it requires either "group"or "other" write permission

  • The chacl command is only available when communicating with an HPSS server

  • The HPSS Transfer Agent does not currently support checksum hashes

Examples

  1. Create a checksum hash for all " .c " files in the current directory
    hashcr *.c
  2. Create a checksum for the files F1 - F5 using HERE-document syntax
        hashcreate << EOF
        F1 F2 F3
        F4
        F5
        EOF

Related Commands

hashconvert hashdelete, hashlist hashverify

-c option for put and get commands