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Top Forums UNIX for Dummies Questions & Answers crontab every other week Post 302341276 by Paul.S on Wednesday 5th of August 2009 12:02:14 PM
Old 08-05-2009
crontab every other week

I have two sets of tapes for each week days.

Mon_Set_A ____________Tue_Set_B
Tue_Set_A ____________ Tue_Set_B
Wed_Set_A ___________ Wed_Set_B
Thr_Set_A ____________ Thr_Set_B
Fri_Set_A _____________ Fri_Set_B

I have script that does cold backup of database and then back up to tape.

It will be much simpler problem if I only work with one set of tape backup but I have to rotate the tape every other week. For an example, 1st week I use tape backup Set_A and 2nd week backup Set_B, and so on.

There are search result using "Perderabo's date calculator" with "weekselector" that has command

0 0 * * 1 /usr/local/bin/weekselector odd && command1
0 0 * * 1 /usr/local/bin/weekselector even && command2

But I guess above crontab command is not competible in linux environment.

I'm wondering if there are any other way to resolve my issue.

thank you
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BACKUP_VOLINFO(8)					       AFS Command Reference						 BACKUP_VOLINFO(8)

backup_volinfo - Displays a volume's dump history from the Backup Database SYNOPSIS
backup volinfo -volume <volume name> [-localauth] [-cell <cell name>] [-help] backup voli -v <volume name> [-l] [-c <cell name>] [-h] DESCRIPTION
The backup volinfo command displays a dump history of the specified volume, reporting information such as the date on which the volume was dumped and the tapes that contain it. Include the ".backup" extension on the volume name if the backup version of the volume was dumped. OPTIONS
-volume <volume name> Names the volume for which to display the dump history. Include the ".backup" or ".readonly" extension if the backup or read-only version of the volume was dumped. -localauth Constructs a server ticket using a key from the local /etc/openafs/server/KeyFile file. The backup command interpreter presents it to the Backup Server, Volume Server and VL Server during mutual authentication. Do not combine this flag with the -cell argument. For more details, see backup(8). -cell <cell name> Names the cell in which to run the command. Do not combine this argument with the -localauth flag. For more details, see backup(8). -help Prints the online help for this command. All other valid options are ignored. OUTPUT
The output includes a line for each Backup Database dump record that mentions the specified volume, order from most to least recent. The output for each record appears in a table with six columns: dumpID The dump ID of the dump that includes the volume. lvl The depth in the dump hierarchy of the dump level at which the volume was dumped. A value of 0 indicates a full dump. A value of 1 or greater indicates an incremental dump made at the specified depth in the dump hierarchy. parentid The dump ID of the dump's parent dump. A value of 0 indicates a full dump, which has no parent; in this case, the value in the "lvl" column is also 0. creation date The date and time at which the Backup System started the dump operation that created the dump. clone date For a backup or read-only volume, the time at which it was cloned from its read/write source. For a read/write volume, the same as the value in the "creation date" field. tape name The name of the tape containing the dump: either the permanent tape name, or an AFS tape name in the format volume_set_name.dump_level_name.tape_index where volume_set_name is the name of the volume set associated with the initial dump in the dump set of which this tape is a part; dump_level_name is the name of the dump level at which the initial dump was backed up; tape_index is the ordinal of the tape in the dump set. Either type of name can be followed by a dump ID in parentheses; if it appears, it is the dump ID of the initial dump in the dump set to which this appended dump belongs. EXAMPLES
The following example shows part of the dump history of the Backup volume "user.smith.backup": % backup volinfo -volume user.smith.backup DumpID lvl parentID creation date clone date tape name 924600000 1 924427600 04/20/1999 05:20 04/20/1999 05:01 user_incr_2 (924514392) 924514392 1 924427600 04/19/1999 05:33 04/19/1999 05:08 user_incr_2 924427600 0 0 04/18/1999 05:26 04/18/1999 04:58 user_full_6 . . . . . . . . . . . . . . . . PRIVILEGE REQUIRED
backup(8), backup_dumpinfo(8), backup_volrestore(8) COPYRIGHT
IBM Corporation 2000. <> All Rights Reserved. This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell. OpenAFS 2012-03-26 BACKUP_VOLINFO(8)

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