pete@bally.Bally.COM (Pete Gregory) (06/19/89)
We do incremental backups using cpio. The script follows: #!/bin/sh # backwk.bat - incremental backup of system files # cd / find . -mtime -1 -print | egrep -v "^(./usr/spool/news/)" | cpio -ovC1000 >/dev/rmt0 ...this script finds and backs up all files created/modified "today" or "yesterday". Everything is backed up except news :-) . Look up grep or egrep if you want to exclude other directories. P.S. Our full filesystem backups are the same as above, except that '-mtime -1' is removed, and the cd / is changed to /usr, /u, etc. For the root filesystem, we 'cd /' and egrep -v /usr, /u, etc., so they won't be backed up twice. cpio knows how to tell you to put in a 2nd cartridge, so large backups work, too ;-) pete@bally.COM (bally.UUCP) :: ________ Bally Systems :: |\ / \ "My boss 255 Bell St., Reno, NV :: | X IXOYE ) is a (702) 323-6156 x882 :: |/ \ ________ / carpenter."
karish@forel.stanford.edu (Chuck Karish) (07/22/89)
In article <12237@well.UUCP> gors@well.UUCP (Gordon Stewart) wrote: > >Hello, I am trying to figure out how to do regular backups on >an IBM RT running AIX 2.2.1. >I can't seem >to give the backup command more than one volume to back up at once. Time for a script! >Nor does it appear to have a flag which allows incremental storage >on my tape. Is there any way of backing up several volumes to the >same tape? As far as I know, backup, like tar and cpio, doesn't know anything about tape handling except what to do when it thinks it's run out of media. Choose the no-rewind tape device, and you'll be able to put more than one archive on a tape. On my system, that means using /dev/rmt4 instead of /dev/rmt0. >Does anyone out there have a script which controls the >level of your back up by the current date. The easiest way to do this is to have the script accept the backup level as an input parameter, and write a crontab entry to feed it different numbers on different days. Be sure to program the operator to feed the tape drive different numbers of tapes, unless the intent is to do full backups for different devices on different days. Making sure that the tapes have accurate paper labels on them is an important part of the process. Backup can identify the partition, level, and date from the file on tape, but it takes a long time to retrieve this information if you don't know what's where when you start. Chuck Karish {decwrl,hpda}!mindcrf!karish (415) 493-7277 karish@forel.stanford.edu
njs@scifi.UUCP (Nicholas J. Simicich) (07/22/89)
In article <12237@well.UUCP> gors@well.UUCP (Gordon Stewart) writes: > >Hello, I am trying to figure out how to do regular backups on >an IBM RT running AIX 2.2.1. I would like to use "backup" format >since it appears to be much faster than tar, as well as having an >incremental backup system built into the command. I can't seem >to give the backup command more than one volume to back up at once. The backup command can back up files by name, in which case it can cross file systems, or it can back up file systems, either as images or by inode. The incremental mode is a file system backup, by inode as I recall. If you wanted to do a global backup of changed files, you'd have to make up a list of the files you wanted to back up, and back them up by name. >Nor does it appear to have a flag which allows incremental storage >on my tape. Is there any way of backing up several volumes to the >same tape? Yes, but only if you write all of the files before you reposition the tape. These tapes cannot be read or repositioned and then written to, and you can't append to a file. Now were you to run several backup commands in a row, you could write several successive files to the same tape. But this is not a property of the backup command. It is controlled by the device name. /dev/rmt0 rewinds after. /dev/rmt4 rewinds neither on open or close. /dev/rmt8 retensions before and rewinds after. /dev/rmt12 retensions before but does not rewind. If you were backing up a bunch of file systems, to a single tape, you might write the first file to /dev/rmt12, the intermediates to /dev/rmt4, and the last one to /dev/rmt0. > Does anyone out there have a script which controls the >level of your back up by the current date. I use a fancy tar driver, myself. (.....) -- Nick Simicich --- uunet!bywater!scifi!njs --- njs@ibm.com (Internet)
eap@bu-cs.BU.EDU (Eric Pearce) (07/22/89)
I recently got GNU tar running on our Silicon Graphics machines (They run a SysV with BSD extensions). I imagine I could get it going on the AIX RT's without too much trouble. It supports the BSD "rmt" remote magtape interface, multiple volumes, full and incremental backups and restores and labels your tape. Plus you can run it on practically any Unix machine, so you can read any backup on any machine. Most non-BSD Unix implementations come with their own pet backup program that is totally incompatible with any other vendor's. SGI has "BRU", AIX has "backup", etc. When you have more than 50 diskfull machines to backup, you want to provide a common interface for operators, the ability to do remote backups and restores, and be able to use more than a single tape drive in case of hardware or network failure. -e -- ------------------------------------------------------------------------------- Eric Pearce eap@bu-it.bu.edu Boston University Information Technology 111 Cummington Street Boston MA 02215 617-353-2780 voice 617-353-6260 fax
gors@well.UUCP (Gordon Stewart) (07/22/89)
Hello, I am trying to figure out how to do regular backups on
an IBM RT running AIX 2.2.1. I would like to use "backup" format
since it appears to be much faster than tar, as well as having an
incremental backup system built into the command. I can't seem
to give the backup command more than one volume to back up at once.
Nor does it appear to have a flag which allows incremental storage
on my tape. Is there any way of backing up several volumes to the
same tape? Does anyone out there have a script which controls the
level of your back up by the current date.
Any response would be greatly appreciated.
-Karin Meyer
--
...!{lll-crg,hplabs,cogsci,hoptoad,apple}!well!gorskarish@forel.stanford.edu (Chuck Karish) (08/02/89)
In article <12237@well.UUCP> gors@well.UUCP (Karin Meyer) wrote: >Hello, I am trying to figure out how to do regular backups on >an IBM RT running AIX 2.2.1. I would like to use "backup" format >since it appears to be much faster than tar, as well as having an >incremental backup system built into the command. Tar isn't too bad if you use the `-C' flag to send many blocks at once. I always use `-C800' as a separate command-line parameter to tar. This writes 400K to the tape at once, and the drive doesn't saw back and forth interminably writing 10K at a time (the default). Related question: Have I missed something, or does AIX lack a generic utility to buffer input to the tape drive so it'll stream? I'd like to do remote backups, but dd doesn't have the `-C' option. It seems wasteful to me to support the same code in all tape utilities to do this. >I can't seem >to give the backup command more than one volume to back up at once. Backup is oriented towards backing up individual disk partitions, one per file. It does that job well. You can use a shell script to manage multiple partitions. >Nor does it appear to have a flag which allows incremental storage >on my tape. Is there any way of backing up several volumes to the >same tape? As with most UNIX tape utilities, you can back up several files to the same tape by choosing a no-rewind tape device (/dev/rmt4 or /dev/rmt12). Chuck Karish {decwrl,hpda}!mindcrf!karish (415) 493-9000 karish@forel.stanford.edu
gors@well.UUCP (Gordon Stewart) (08/18/89)
Thanks for all your help, folks, but month-old replies to
a two-month-old query -- is someone out there hoarding news
and re-releasing it a month later?
And what's with all these articles with my name on them
with some fidonet nonesense in the signature?
--
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