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Thread: btrfs makes old hdds appear to operate faster

  1. #61
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    Re: btrfs makes old hdds appear to operate faster

    Yes it does seem complicated but all it needs to become official is a couple of scripts. After all update-grub is just an x-shellscript that calls grub-mkconfig.

    #! /bin/sh
    set -e
    exec grub-mkconfig -o /boot/grub/grub.cfg "$@"
    Something similar can be done to turn this roll back to a previous version into a single command.


    Well done. Superb testing!

    P.S. Message for ventrical and anyone interested. I found this link with this possibly useful information.

    http://www.howtoforge.com/how-to-con...n-ubuntu-12.10

    It gives instruction on how to convert ext3 or ext4 root file system to btrfs. I might test this out with my recently installed 12.10 ext4 to see if I can get a bootable 12.10 btrfs system. Which I seem unable to do. And it can be rolled back from a snapshot. The link also says this

    If you don't do this, you will get the error...

    error: sparse file not allowed
    That is to comment out line 93 in /etc/grub.d/00_header
    Last edited by grahammechanical; February 13th, 2013 at 10:14 PM.
    It is a machine. It is more stupid than we are. It will not stop us from doing stupid things.
    Ubuntu user #33,200. Linux user #530,530


  2. #62
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    Re: btrfs makes old hdds appear to operate faster

    Thanks for the extra info grahamechanical. That will come in handy.

    regards,
    ventrical
    This is not Convergence, This is now Gnome
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  3. #63
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    Re: btrfs makes old hdds appear to operate faster

    I had been reading up on some info about the 'other' file systems available for Ubuntu, especially XFS and JFS. It is said that XFS is the fastest. I had just done an install on an old maxtor, 20GB 4800rpm hdd and it certainly is faster than btrfs by a long shot.

    There are certainly faster desktop response times and other apps can be opened without logjam while ubuntu is doing other chores. This all on a single core non HT 2.8GHz Pentium.

    The data says that XFS filesystem is unstable , especially in power down events ... so my first experiment will be to .. well .. pull the power plug out ! Here goes.!
    This is not Convergence, This is now Gnome
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  4. #64
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    Re: btrfs makes old hdds appear to operate faster

    Obviously some of the info at this link:

    http://ubuntuforums.org/showthread.php?t=246969

    is inaccurate as I just pulled the plug out and it rebooted fine with no loss of data .

    Now to swap the hdd onto a duplicate machine with HT capability.
    This is not Convergence, This is now Gnome
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  5. #65
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    Re: btrfs makes old hdds appear to operate faster

    It is actually slower on the HT system. I think it is because I do not have the right memory installed.... but I am convinced that because the response time on the single core non HT system that XFS and JFS warrant further experimentation. So I will install raring on a faster hdd.
    This is not Convergence, This is now Gnome
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    Running 16.04 on Mobo: MSI model: B85-G41 PC Mate(MS-7850) v: 1.0

  6. #66
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    Re: btrfs makes old hdds appear to operate faster

    I'm still using btrfs on my Raring install and I'm absolutely loving the apt-btrfs-snapshot functionality!
    However, I'm finding that performance is degrading terribly. I'm coming across many instances where my HDD light goes solid and I appear completely I/O bound while I have to sit & wait for whatever transactions are happening to finish.
    Have you seen anything like this Ventrical or been able to work around it? I should note that I'm using a quad-core i5, 8GB DDR3 & a 256GB Vertex SSD - so this laptop is no slouch..
    My mount options look like this;
    compress=lzo,ssd,discard,space_cache,relatime,subv ol=@ 0 1

  7. #67
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    Re: btrfs makes old hdds appear to operate faster

    No .. I haven't seen anything of that sort yet .. but, as I had been testing I noticed that (while using Disks>Benchmark) that there is not much of a difference in data transfer speeds but this would not affect how the btrfs handles files and data.

    With your machine,being quad with nitro lol, I would wonder if one could really tell the difference between ext4 and btrfs . I am planning to do some more experimentation with btrfs while also testing JFS and XFS.

    For the normal end_user and noob I do not think btrfs would be very helpful as it is very complex to work and a lot of terminal entries plus there are some issues with Grub (with some machines) atm.
    This is not Convergence, This is now Gnome
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  8. #68
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    Re: btrfs makes old hdds appear to operate faster

    Quote Originally Posted by ventrical View Post
    No .. I haven't seen anything of that sort yet .. but, as I had been testing I noticed that (while using Disks>Benchmark) that there is not much of a difference in data transfer speeds but this would not affect how the btrfs handles files and data.

    With your machine,being quad with nitro lol, I would wonder if one could really tell the difference between ext4 and btrfs . I am planning to do some more experimentation with btrfs while also testing JFS and XFS.

    For the normal end_user and noob I do not think btrfs would be very helpful as it is very complex to work and a lot of terminal entries plus there are some issues with Grub (with some machines) atm.
    I've had a really good experience with btrfs so far - I had nil of any install or grub related issues at install and everything's been fairly smooth.
    Performance is probably on par with ext4 - or close enough that I don't notice it. It's only when something happens in the background and I become locked up that it's a pain.

    That being said, snapshots, checksumming etc are so worth it, especially when I insist on running development versions of Ubuntu

  9. #69
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    Re: btrfs makes old hdds appear to operate faster

    I tired to set raring up on my dual core machine with nvidia and it just locks up. That was the Feb 12th raring-desktop-i386.. so I zsynced today and will try again.
    This is not Convergence, This is now Gnome
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    Running 16.04 on Mobo: MSI model: B85-G41 PC Mate(MS-7850) v: 1.0

  10. #70
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    Re: btrfs makes old hdds appear to operate faster

    I've been testing btrfs on-and-off for about a year or so, and just recently switched back to it for my home pc and workstation at work. The snapshotting is so convenient, and online scrubbing is awesome.
    I haven't experienced much slowdown from fragmentation in my previous tests, but I decided to give the "autodefrag" mount option a try anyhow. I have my fstab as follows:

    UUID=xxxxx / btrfs subvol=@,compress=lzo 0 0
    UUID=xxxxx /home btrfs subvol=@home,autodefrag 0 0

    I have my / on an SSD, so fragmentation doesn't matter as much. My /home is a standard 1TB HDD, so I'm going to see how it holds up over the next 6 months or so with the autodefrag enabled. I've been filling up my HDD with recordered digital TV, so it should be a good fragmentation test.

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