Use Datasets? Or store everything in my pool?

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Re: Use Datasets? Or store everything in my pool?

Post by si-ghan-bi » Mon Sep 24, 2012 1:40 pm

Thank you.
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Re: Use Datasets? Or store everything in my pool?

Post by si-ghan-bi » Sun Sep 30, 2012 3:17 pm

Is it possible to stop children filesystems from showing up on the sidebar and on the desktop of the Finder? I would like to see only the root pool, then the child datasets should be seen only inside the folder structure, where I mounted them.
Of course hiding mounted filesystems from the Finder preferences is not what I mean :)

I can see the usefulness of many datasets, for example they make the snapshotting much more flexible, but I don't want a huge list of drives in the Finder.

I am moving files from my main pool to the dataset I created. I would have liked the files to be moved without actual reading/writing, but it seems they are treated really like different disk drives: the moving is painfully slow.

As info, I used the following commands:
zpool create -o ashift=12 -O casesensitivity=insensitive myPool /dev/disk3
sudo zpool attach myPool GPTE_34B525B3-6497-49AC-B8C7-8F82A9FF7B3C /dev/disk1
sudo zfs create myPool/myDataset
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sidebar views of child file systems

Post by grahamperrin » Sun Sep 30, 2012 10:58 pm

si-ghan-bi wrote:Is it possible to stop children filesystems from showing up on the sidebar …? …


Yes, but you must show at least once before you can remove.

  1. In the ZEVO pane of System Preferences, show child file systems in sidebars
  2. in the sidebar of a Finder window, Control-click the volume to be not shown
  3. Remove from Sidebar.

The operating system will respect your preference. When you next use the disk, the previously removed volume will not reappear.
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desktop and alternative views of child file systems

Post by grahamperrin » Sun Sep 30, 2012 11:14 pm

si-ghan-bi wrote:Is it possible to stop children filesystems from showing up on … the desktop …? …


With Finder preferences set to show, and with preferences for ZEVO Community Edition 1.1.1 set to show:

  • sorry, no easy way to stop the show.

ZEVO, ZFS and Finder aside: there may be more advanced methods of making a volume invisible to desktops. However, such methods may defeat the purpose of you creating a child file system.

Personally, I dropped the disks-on-desktop habit years ago – no regrets.

Alternatives to disks/volumes/file systems on desktops

Sidebar is more configurable than the desktop, but I avoid the sidebar (it's lossy).

For a frequently used volume, I might do any or all of the following:

  1. Command-Shift-C then key the first letter of the name of the volume
  2. place an alias of the volume in ~/Library/Favorites
  3. drag the volume to the Dock.
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Re: Use Datasets? Or store everything in my pool?

Post by si-ghan-bi » Mon Oct 01, 2012 5:46 pm

I will experiment with it, thanks.
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Re: Use Datasets? Or store everything in my pool?

Post by si-ghan-bi » Wed Oct 03, 2012 5:19 pm

This is strange. From the Finder preferences I can enable or disable hard drives and external drives from the sidebar and desktop.
If I enable hard drives on the desktop, I get both the internal HFS+ disk and the child FS within the ZFS pool. If I enable external disks, I get also the external ZFS pool.
On the sidebar, instead, there is no way to show the child filesystem, because it does not appear neither as hard drives nor external drive.
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child datasets as sidebar DEVICES in Mountain Lion

Post by grahamperrin » Wed Oct 03, 2012 11:08 pm

… sidebar … no way to show the child filesystem …


Child file systems as sidebar DEVICES in Mountain Lion

No problem here. Both parent and child in the sidebar:

2012-10-04 05-03-00 screenshot.png
Pocket Time Machine, in the sidebar, is a child of zhandy
2012-10-04 05-03-00 screenshot.png (124.69 KiB) Viewed 34 times


If necessary:

  1. drag the volume from the window
  2. drop on DEVICES.
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