Re: btrfs across a mix of SSDs & HDDs

2012-05-02 Thread Duncan
viv...@gmail.com posted on Thu, 03 May 2012 01:54:01 +0200 as excerpted: > Il 02/05/2012 20:41, Duncan ha scritto: >> Martin posted on Wed, 02 May 2012 15:00:59 +0100 as excerpted: >> >>> Multiple pairs of "HDD paired with SSD on md RAID 1 mirror" is a >>> thought with ext4... >> FWIW, I was looki

Re: btrfs across a mix of SSDs & HDDs

2012-05-02 Thread viv...@gmail.com
Il 02/05/2012 20:41, Duncan ha scritto: Martin posted on Wed, 02 May 2012 15:00:59 +0100 as excerpted: Multiple pairs of "HDD paired with SSD on md RAID 1 mirror" is a thought with ext4... FWIW, I was looking at disk upgrades for my (much different use case) home workstation a few days ago, an

Re: btrfs across a mix of SSDs & HDDs

2012-05-02 Thread Duncan
Martin posted on Wed, 02 May 2012 15:00:59 +0100 as excerpted: > Multiple pairs of "HDD paired with SSD on md RAID 1 mirror" is a thought > with ext4... FWIW, I was looking at disk upgrades for my (much different use case) home workstation a few days ago, and the thought of raid1 across SSD and

Re: btrfs across a mix of SSDs & HDDs

2012-05-02 Thread Martin
Thanks for good comments. >> Is the OP using Oracle Linux? > > He didn't say. But he didn't say he WON'T be using oracle linux (or > other distro which supports btrfs) either. Plus the kernel can be > installed on top of RHEL/Centos 5 and 6, so he can easily choose > either the supported version

Re: btrfs across a mix of SSDs & HDDs

2012-05-01 Thread Fajar A. Nugraha
On Wed, May 2, 2012 at 12:00 PM, Bardur Arantsson wrote: > On 05/02/2012 06:28 AM, Fajar A. Nugraha wrote: >>>  From Kconfig: >>> >>>   "Btrfs filesystem (EXPERIMENTAL) Unstable disk format" >>>                         ^^ >>> >>> Btrfs is too immature to use in ANY kin

Re: btrfs across a mix of SSDs & HDDs

2012-05-01 Thread Bardur Arantsson
On 05/02/2012 06:28 AM, Fajar A. Nugraha wrote: On Wed, May 2, 2012 at 9:22 AM, Bardur Arantsson wrote: On 05/01/2012 09:35 PM, Martin wrote: From Kconfig: "Btrfs filesystem (EXPERIMENTAL) Unstable disk format" ^^ Btrfs is too immat

Re: btrfs across a mix of SSDs & HDDs

2012-05-01 Thread Fajar A. Nugraha
On Wed, May 2, 2012 at 9:22 AM, Bardur Arantsson wrote: > On 05/01/2012 09:35 PM, Martin wrote: >> >> How well does btrfs perform across a mix of: >> >> 1 SSD and 1 HDD for 'raid' 1 mirror for both data and metadata? >> The idea is to gain the random access speed of the SSDs but have the >> HDDs

Re: btrfs across a mix of SSDs & HDDs

2012-05-01 Thread Bardur Arantsson
On 05/01/2012 09:35 PM, Martin wrote: How well does btrfs perform across a mix of: 1 SSD and 1 HDD for 'raid' 1 mirror for both data and metadata? Similarly so across 2 SSDs and 2 HDDs (4 devices)? Can multiple (small) SSDs be 'clustered' as one device and then mirrored with one large HDD with

Re: btrfs across a mix of SSDs & HDDs

2012-05-01 Thread Martin
On 01/05/12 22:16, sam tygier wrote: > On 01/05/12 20:35, Martin wrote: > >> The idea is to gain the random access speed of the SSDs but have the >> HDDs as backup in case the SSDs fail due to wear... > > Have you looked at the bcache project http://bcache.evilpiepirate.org/ Many thanks for that

Re: btrfs across a mix of SSDs & HDDs

2012-05-01 Thread sam tygier
On 01/05/12 20:35, Martin wrote: The idea is to gain the random access speed of the SSDs but have the HDDs as backup in case the SSDs fail due to wear... Have you looked at the bcache project http://bcache.evilpiepirate.org/ sam -- To unsubscribe from this list: send the line "unsubscribe li

btrfs across a mix of SSDs & HDDs

2012-05-01 Thread Martin
How well does btrfs perform across a mix of: 1 SSD and 1 HDD for 'raid' 1 mirror for both data and metadata? Similarly so across 2 SSDs and 2 HDDs (4 devices)? Can multiple (small) SSDs be 'clustered' as one device and then mirrored with one large HDD with btrfs directly? (Other than using lvm..