[CentOS] Is ext4 safe for a production server?
christopher.chan at bradbury.edu.hk
Fri Dec 11 01:10:54 UTC 2009
John R Pierce wrote:
> Mark Caudill wrote:
>> 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?
> if LVM is ignoring write barriers, its not a good idea on hardware raid,
> either, at least not for applications that rely on committed writes,
> like transactional databases.
Write barriers are for the case of getting a data guarantee with hard
disks connected via sata/scsi that have their write caches enabled.
Hardware raid + bbu cache change that game. LVM on hardware raid is safe
due to the bbu cache (with write caches on connected hard drives set to off)
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