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Re: Decrease/increase XFS partitions

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On Wed, Aug 17, 2016 at 09:38:50AM -0400, Gene Heskett wrote:
> This last link is from 2008.  It does seem to be difficult, and only 
> accomplishable by a full dump, repartition and recovery. The latter 
> would not be a problem if a regular backup is being done. But I've no 
> knowldge about how tar handles an xfs filesystem. Ack the man page, its 
> agnostic as there is zero mention of the filesytem in use.
> 
> I use amanda as the tar manager here but my nightly backups are rather 
> tiny compared to 13Tb, rarely exceeding 20 gigabytes for 4 machines. 
> 
> With my wrapper script, I can lose the main drive, and put in a new one, 
> and have it recovered to its state as of about 3am this morning in 4 or 
> 5 hours. Any transactions after that time would be lost but 98% of that 
> is email traffic.  Non-commercial IOW. Using commodity 1T drives, I have 
> the last 30 days worth of amanda backups on one of them using virtual 
> tapes. Unlike a tape drive that always has to spend the winter holidays 
> in Oklahoma City getting rebuilt, I have random (fast) access to my 
> data. That drive is now about 4 years old, has had 25 re-allocated 
> sectors for much of that time, less than 50 power ups, and shows 45% 
> usage in a df -h report right now.  Whats not to like? :)
> 
> What does zfs do for one that ext4 can't that makes it attractive to use?

ZFS has:
 - checksum of all data, so you can detect when you are reading
   data that wasn't what you wrote

 - if RAID is set up, correction of that data, including knowing
   which cop(ies) pass the checksum

 - built in snapshotting, faster and more efficient than LVM's
   version

 - built in send/receive - like dump, but with better than rsync
   efficiency

 - read and write caching for spinning disks can be done with
   SSDs, to provide a significant price/performance advantage
   for large storage.

Of these, I guess the last one wouldn't be too interesting to
you. 

-dsr-

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Decrease/increase XFS partitions ML mail <mlnospam@yahoo.com> - 2016-08-17 09:50 +0200
  Re: Decrease/increase XFS partitions Igor Cicimov <icicimov@gmail.com> - 2016-08-17 10:00 +0200
    Re: Decrease/increase XFS partitions <tomas@tuxteam.de> - 2016-08-17 10:10 +0200
      Re: Decrease/increase XFS partitions Gene Heskett <gheskett@shentel.net> - 2016-08-17 15:40 +0200
        Re: Decrease/increase XFS partitions Dan Ritter <dsr@randomstring.org> - 2016-08-17 21:10 +0200
    Re: Decrease/increase XFS partitions Gene Heskett <gheskett@shentel.net> - 2016-08-17 15:00 +0200
  Re: Decrease/increase XFS partitions Gene Heskett <gheskett@shentel.net> - 2016-08-17 15:00 +0200
    Re: Decrease/increase XFS partitions <tomas@tuxteam.de> - 2016-08-17 15:20 +0200
      Re: Decrease/increase XFS partitions Pascal Hambourg <pascal@plouf.fr.eu.org> - 2016-08-17 15:30 +0200
        Re: Decrease/increase XFS partitions <tomas@tuxteam.de> - 2016-08-17 15:40 +0200
          Re: Decrease/increase XFS partitions Pascal Hambourg <pascal@plouf.fr.eu.org> - 2016-08-17 16:20 +0200
      Re: Decrease/increase XFS partitions Gene Heskett <gheskett@shentel.net> - 2016-08-17 16:00 +0200
        Re: Decrease/increase XFS partitions <tomas@tuxteam.de> - 2016-08-17 16:10 +0200
          Re: Decrease/increase XFS partitions Gene Heskett <gheskett@shentel.net> - 2016-08-17 16:30 +0200
          Re: Decrease/increase XFS partitions deloptes <deloptes@gmail.com> - 2016-08-17 21:20 +0200
    Re: Decrease/increase XFS partitions Brian <ad44@cityscape.co.uk> - 2016-08-17 15:40 +0200
      Re: Decrease/increase XFS partitions Gene Heskett <gheskett@shentel.net> - 2016-08-17 16:00 +0200
        Re: Decrease/increase XFS partitions Greg Wooledge <wooledg@eeg.ccf.org> - 2016-08-17 16:10 +0200
          Re: Decrease/increase XFS partitions Gene Heskett <gheskett@shentel.net> - 2016-08-17 16:30 +0200
            Re: Decrease/increase XFS partitions Darac Marjal <mailinglist@darac.org.uk> - 2016-08-17 17:00 +0200
          Re: Decrease/increase XFS partitions <tomas@tuxteam.de> - 2016-08-17 17:00 +0200
        Re: Decrease/increase XFS partitions Brian <ad44@cityscape.co.uk> - 2016-08-17 16:30 +0200
      Re: Decrease/increase XFS partitions deloptes <deloptes@gmail.com> - 2016-08-17 21:10 +0200

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