La commande 'snapfile' permet de découper un fichier volumineux issu de la commande 'snap' en plusieurs morceaux.
On peut donner la taille en bloc de 1MB ou juste le nom du fichier de sortie.
La commande lancée sans argument s'appuie sur le fichier par défaut snap.pax.Z
snapsplit Command
Purpose
To split a snap output file into multiple smaller files of arbitrary or specified size.
Syntax
snapsplit [ -s size ] [ -H machinename ] [ -f filename ]
snapsplit -u -T timestamp [ -H machinename ]
Description
The snapsplit command is used to split a snap output file into smaller files. This command is useful for dealing with very large snap files. It breaks the file down into files of a specific size that are multiples of 1 megabyte. Furthermore, it will combine these files into the original file when called with the -u option.
The output files are named as following: snap. machinename .timestamp .pax.Z.xxx. Machinename is the hostname and timestamp is in the format MMDDYYHHMMSS. In addition, xxx represents the extension for the split files which is crucial when putting these files back together. The extensions from the start of the files go in the following order: xaa, xab, xac, xad, xae ..., xaz, xba, xbb, xbc, xbd, ..., xbz, xca, xcb, xcc, ....
When performing ls on these files, the first file listed would represent the top of the original file and the last file, the end of the original file.
Note that this command should only be used for snap files that are paxed and compressed. When executed on local system where snap output was gathered, the -H option need not be used. That flag is provided for the case where user has moved a complete snap file to a remote system and wishes to split it. Any machine name may be selected, but it is recommended, to use the machine name where data was collected.
Flags
Examples
- To split the default snap file (snap.pax.Z should be in the current directory), enter the following:
snapsplit
The output of this command is written to current directory. - To split file snap.somefile.pax.Z from system doe, enter the following:
snapsplit -H doe -f snap.somefile.pax.Z
Note:The resulting files will be named snap.doe.MMDDYYHHMMSS.pax.Z. - To restore a file for which the snap files (snap.sue.102303141211.xxx) are for system sue, and timestamp 102303141211, type:
snapsplit -u -T 102303141211 -H sue
Attention: If any one of the snap files is missing or has been renamed, the snap file created will corrupted. - To restore a snap file from files with time stamp 102603084512, and which are for the current system, type:
snapsplit -u -T 102603084512
- To gather general system configuration information, including the output of the lslpp -hBc command, type the following:
snap -g -o /dev/rfd0
Output is written to the /tmp/ibmsupt/general/lslpp.hBc and /tmp/ibmsupt/general/general.snap files. This command also writes the system information to a removable diskette.
Files
| /usr/sbin/snapsplit | Contains the snapsplit command. |
