[CentOS] Ext4 on CentOS 5.5 64bit

Fri Dec 24 03:04:20 UTC 2010
Christopher Chan <christopher.chan at bradbury.edu.hk>

On Friday, December 24, 2010 05:25 AM, Ross Walker wrote:

>> I'd stick with ext3 + data=journal with the journal either on some uber
>> fast and large external BBU nvram block device (you can get up to 1TB
>> with speeds of 750MiB/sec+ if you have a fat enough bus) or on hardware
>> raid with sufficient BBU cache for an email server. Or anything with
>> barrier support through the entire chain (read: no LVM).
> I believe barrier support is being deprecated in current kernels. Don't remember what they are replacing them with, straight FUA maybe. Barriers never performed well enough.

Yea, I get a heads up. I did not know about barriers until after a year 
it was implemented. But I'll still want to use some nvram solution from 
umem or fusionio for scenarios where a lot of files are transient or 
created and deleted almost immediately and high performance is required.

Storage usually means get the hardware to mitigate data loss due to 
whatever or ensure barrier/whatever support.