[CentOS] Is ext4 safe for a production server?

Mark Caudill markca at codelulz.com
Fri Dec 11 00:52:23 UTC 2009


Christopher Chan wrote:
> Morten Torstensen wrote:
>> On 08.12.2009 13:34, Chan Chung Hang Christopher wrote:
>>>> Speaking for me (on Linux systems) on top of LVM on top of md. On IRIX
>>>> as it was intended.
>>>>
>>> That is a disaster combination for XFS even now. You mentioned some
>>> pretty hefty hardware in your other post...
>> If XFS doesn't play well with LVM, how can it even be an option? I 
>> couldn't live without LVM...
>>
> 
> I meant it in the sense of data guarantee. XFS has a major history of 
> losing data unless used with hardware raid cards that have a bbu cache. 
> That changed when XFS got barrier support.
> 
> However, anything on LVM be it ext3, ext4 or XFS that has barrier 
> support will not be able to use barriers because device-mapper does not 
> support barriers and therefore, if you use LVM, it better be on a 
> hardware raid array where the card has bbu cache.

Wait, just to be clear, are you saying that all use of LVM is a bad idea 
unless on hardware RAID? That's bad it if it's true since it seems to me 
that most modern distros like to use LVM by default. Am I missing something?

-- 
Never trust a computer you can't throw out a window.
   - Steve Wozniak


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