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#1 2012-03-11 23:43:11

sqlpython
#! Die Hard
From: New England
Registered: 2011-11-28
Posts: 931

btrfs (filesystem) Convert Wheezy or newer

This popped up on my Debain feed today
I thought some would find it of Interest.

What is btrfs ?
http://en.wikipedia.org/wiki/Btrfs

Ok... How do You convert it...
http://www.debian-administration.org/ar … m_to_btrfs


OHCG #!, Jessie,, Siduction-13.1Slackware 14Bridge,, Sabayon 13.4,

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Be excellent to each other!

#2 2012-03-12 01:39:37

VastOne
#! Ranger
From: V-Ger
Registered: 2011-04-26
Posts: 10,165
Website

Re: btrfs (filesystem) Convert Wheezy or newer

btrfs has been a long time in development and has promised delivery forever and failed ... IMO

It has a lot of promise but I would not trust it all yet, unless you have a development machine/partition to play with


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#3 2012-03-12 09:13:03

gensym
#! Junkie
Registered: 2011-10-17
Posts: 447

Re: btrfs (filesystem) Convert Wheezy or newer

I don't think it is worth converting your file systems from ext4 to btrfs (at the moment at least). For tasks where you deal with many little  files (i.e compilation) ext4 is just miles ahead.


'Multiple exclamation marks,' he went on, shaking his head, 'are a sure sign of a diseased mind.', {Eric}

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#4 2012-03-12 12:30:03

pvsage
Internal Affairs
From: North Carolina
Registered: 2009-10-18
Posts: 13,970

Re: btrfs (filesystem) Convert Wheezy or newer

I think we had a thread on butterface (I believe that's how gutterslob pronounced it) before; I have no first-hand experience with it, but from what I've read VastOne's advice seems sound.

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#5 2012-03-12 18:16:35

ivanovnegro
Ivan #000000
From: unstable madness
Registered: 2011-06-02
Posts: 5,432

Re: btrfs (filesystem) Convert Wheezy or newer

And I am even still on Ext3. smile

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#6 2012-03-12 18:25:53

pvsage
Internal Affairs
From: North Carolina
Registered: 2009-10-18
Posts: 13,970

Re: btrfs (filesystem) Convert Wheezy or newer

I probably would be too, but I roll on a SSD and wanted "discard" support.

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#7 2012-03-12 18:25:57

el_koraco
#!/loony/bun
From: inside Ed
Registered: 2011-07-25
Posts: 4,749

Re: btrfs (filesystem) Convert Wheezy or newer

ivanovnegro wrote:

And I am even still on Ext3. smile

You can mount it as ext4, there is complete backwards compatibility. Dunno what you guys mean by BTRFS false promises, the lead developer and maintainer of ext4 is all for it. There's no reliable fsck tool at the moment, which is the only thing keeping it from being production ready. We're not gonna get great benefits on desktop systems (it's a server FS, just like ZFS), but FS snapshots, online FS resizing, the eventual built in LVM are pretty cool things for stuff like backups, drive hotswapping and the like.   

People have been using BTRFS as the default filesystem for some time now, mostly without problems.

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#8 2012-03-12 18:31:40

VastOne
#! Ranger
From: V-Ger
Registered: 2011-04-26
Posts: 10,165
Website

Re: btrfs (filesystem) Convert Wheezy or newer

There's no reliable fsck tool at the moment, which is the only thing keeping it from being production ready

.
That is the show stopper


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#9 2012-03-12 18:59:23

xor
#! Die Hard
Registered: 2012-01-11
Posts: 775

Re: btrfs (filesystem) Convert Wheezy or newer

as i understand it, ext3 is faster than ext4.
but ext4 has journaling, which might be an advantage for data recovery.
is this correct ?

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#10 2012-03-12 19:23:04

lcafiero
The #! Guy
From: Felton, California, USA
Registered: 2011-07-21
Posts: 2,225
Website

Re: btrfs (filesystem) Convert Wheezy or newer

I don't know much about it, though i can tell you that Fedora (which tries, and often succeeds, in being first to put things out on their distro) has been having fits for quite some time trying to incorporate it into their distro. I think they tried to have it ready for Fedora 16 (the current release) but it wasn't, and now it looks like they're sticking with ext4 as their default for the next release as well.


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#11 2012-03-12 19:35:03

VastOne
#! Ranger
From: V-Ger
Registered: 2011-04-26
Posts: 10,165
Website

Re: btrfs (filesystem) Convert Wheezy or newer

^ That is one of my main concern with btrfs... How Fedora tried like hell to influence it's development but keeps getting egg in the face waiting.

You can have the greatest devs there are and all the best intentions, you still have to deliver.

I have been waiting for at least three years for btrfs and continue to test it every 3-4 months..


VSIDO | Words That Build Or Destroy

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#12 2012-03-12 19:45:23

ivanovnegro
Ivan #000000
From: unstable madness
Registered: 2011-06-02
Posts: 5,432

Re: btrfs (filesystem) Convert Wheezy or newer

jens wrote:

as i understand it, ext3 is faster than ext4.
but ext4 has journaling, which might be an advantage for data recovery.
is this correct ?

Ext3 has also journaling.

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#13 2012-03-12 20:03:25

xor
#! Die Hard
Registered: 2012-01-11
Posts: 775

Re: btrfs (filesystem) Convert Wheezy or newer

so what is the benefit of ext4 over ext3 then ?

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#14 2012-03-12 20:32:52

el_koraco
#!/loony/bun
From: inside Ed
Registered: 2011-07-25
Posts: 4,749

Re: btrfs (filesystem) Convert Wheezy or newer

VastOne wrote:

That is the show stopper

Yes, but that's the only thing. Fedora isn't the issue here really. The top butter devs are from Oracle, and Oracle is gearing up to offer full support with the next "Unbreakable Kernel". The "stable" version of btrfsck can find bad sectors on the drive, it just can't repair them yet. The git version does have a full fsck, but the devs are not advising its use. Three years is not long for a completely redesigned filesystem. Even Microsoft is releasing RsFS as a server preview only in Windows 8, and that baby's been in development one way or another since Longhorn.

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#15 2012-03-12 20:50:30

VastOne
#! Ranger
From: V-Ger
Registered: 2011-04-26
Posts: 10,165
Website

Re: btrfs (filesystem) Convert Wheezy or newer

^ And when it is ready, I will be one of the first to convert.  Looking for the snapshot capabilities in action

I did not suggest that Fedora was an issue, I meant that even the push from Fedora to use it as it's default did not hasten the development.

3 years is not long at all, and when it does release all of this will be forgotten


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#16 2012-03-12 20:57:54

el_koraco
#!/loony/bun
From: inside Ed
Registered: 2011-07-25
Posts: 4,749

Re: btrfs (filesystem) Convert Wheezy or newer

VastOne wrote:

I did not suggest that Fedora was an issue

I didn't mean issue as problem. I meant like The Chinaman

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#17 2012-03-12 20:59:35

VastOne
#! Ranger
From: V-Ger
Registered: 2011-04-26
Posts: 10,165
Website

Re: btrfs (filesystem) Convert Wheezy or newer

^ big_smile  Got it...


VSIDO | Words That Build Or Destroy

I dev VSIDO

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#18 2012-03-12 21:10:09

ivanovnegro
Ivan #000000
From: unstable madness
Registered: 2011-06-02
Posts: 5,432

Re: btrfs (filesystem) Convert Wheezy or newer

jens wrote:

so what is the benefit of ext4 over ext3 then ?

Cannot remember anymore as I am not that deeply in such things but seems the world says ext4 is faster than ext3. Now I will play the Google card. smile

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#19 2012-03-12 21:16:28

el_koraco
#!/loony/bun
From: inside Ed
Registered: 2011-07-25
Posts: 4,749

Re: btrfs (filesystem) Convert Wheezy or newer

jens wrote:

so what is the benefit of ext4 over ext3 then ?

ext4 has a number of improvements (I'm not gonna name them individually, that would mean little) the improve disk I/O, reliability, journaling, and reduce file system fragmentation even more than the case with ext3. The journal can even be turned off, which is useful in certain scenarios.

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#20 2012-03-12 21:58:07

xor
#! Die Hard
Registered: 2012-01-11
Posts: 775

Re: btrfs (filesystem) Convert Wheezy or newer

ivanovnegro & el_koraco,
thanks a lot for sharing your info !
so you would recommend the use of ext4 over ext3, i guess ?

EDIT: OK, i found the answer here already:

http://androidforums.com/ally-all-thing … r-why.html

Last edited by xor (2012-03-12 22:10:36)

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#21 2012-03-12 22:15:56

lcafiero
The #! Guy
From: Felton, California, USA
Registered: 2011-07-21
Posts: 2,225
Website

Re: btrfs (filesystem) Convert Wheezy or newer

jens - Completely off-topic and forgive me, but your avatar is oustandingly cool. That looks like something that could be a logo for #! itself.

But you all can continue with your btrfs discussion, please.


Res publica non dominetur | Larry the CrunchBang Guy speaks of the pompetous of CrunchBang

CrunchBang Forum moderator

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#22 2012-03-12 22:19:58

el_koraco
#!/loony/bun
From: inside Ed
Registered: 2011-07-25
Posts: 4,749

Re: btrfs (filesystem) Convert Wheezy or newer

jens wrote:

i
so you would recommend the use of ext4 over ext3, i guess ?

Yes. There's a reason it's the default in all distros.

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#23 2012-03-13 05:08:16

pvsage
Internal Affairs
From: North Carolina
Registered: 2009-10-18
Posts: 13,970

Re: btrfs (filesystem) Convert Wheezy or newer

Does ext3 support noatime and relatime?  I can't remember.  I do remember reading somewhere some benchmarks showing that ext4 was a bit faster, at least in terms of I/O, than ext3.  Plus, discard...

As for butterface...

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#24 2012-03-13 07:49:32

xor
#! Die Hard
Registered: 2012-01-11
Posts: 775

Re: btrfs (filesystem) Convert Wheezy or newer

Icafiero,
thanks a lot, glad to hear you like it - i just tried to be creative... smile
i would love to see that logo being adapted officially for #!, but obviously corenominal prefers to keep the original one.
here are a few more similar logos which i have created earlier: http://crunchbanglinux.org/forums/topic … ated-logo/

el_koraco,
please correct me if i'm wrong, but AFAIR debian offers ext3 as per default !?

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#25 2012-03-13 08:06:23

xor
#! Die Hard
Registered: 2012-01-11
Posts: 775

Re: btrfs (filesystem) Convert Wheezy or newer

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