Re: PostgreSQL with ZFS on Linux

On Fri, Jan 17, 2014 at 2:29 AM, Chris Travers <chris(dot)travers(at)gmail(dot)com>wrote:

>
>
> On Thu, Jan 16, 2014 at 11:14 PM, Sébastien Lorion <
> sl(at)thestrangefactory(dot)com> wrote:
>
>> On Thu, Jan 16, 2014 at 4:42 PM, Clemens Eisserer <linuxhippy(at)gmail(dot)com>wrote:
>>
>>> Hi,
>>>
>>> > If you really want ZFS, I would highly recommend looking into
>>> > FreeBSD (Postgresql works great on it) or if you want to stick with
>>> Linux,
>>> > look into mdadm with LVM or some other filesystem solution.
>>>
>>> If you want to use ZFS because of its features, take a look at btrfs.
>>> It provides a lot of the stuff supported by ZFS with usually better
>>> performance on linux - and since the last few kernel revisions it is
>>> finally in a state where I would dare to use it in production.
>>>
>>> If you need highest performance, don't use a copy-on-write filesystem
>>> like ZFS or btrfs, stick to ext4 or XFS ;)
>>>
>>> Regards, Clemens
>>>
>>>
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>>
>>
>> Do you have any personal experience with BTRFS for a couple of weeks in
>> production or any official statement/case study ? On the FAQ, it says it is
>> still experimental (https://btrfs.wiki.kernel.org/index.php/FAQ), though
>> it may just be outdated. There is also these two links that would make me
>> very cautious (as I am with ZFS on Linux, mind you):
>>
>> http://www.anchor.com.au/blog/2013/04/the-btrfs-backup-experiment/
>> http://arstechnica.com/civis/viewtopic.php?f=16&t=1221177
>>
>> We're looking at it for LedgerSMB hosting (with PostgreSQL, we are
> currently using XFS). So far we are liking what we are seeing. We
> wouldn't be using it for PostgreSQL backups, but the general sense is that
> the developers are very, very conservative about making guarantees of
> stability and so far we haven't seen any indication that "experimental"
> means anything other than "developers nervous about calling it stable."
>
> This being said, we aren't very far into our evaluation yet and our view
> could change.
>
> --
> Best Wishes,
> Chris Travers
>
> Efficito: Hosted Accounting and ERP. Robust and Flexible. No vendor
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>

Thank you Chris, that incites me at looking at btrfs more closely.

Sébastien