[CentOS] 40TB File System Recommendations

Thu Apr 14 12:34:00 UTC 2011
Christopher Chan <christopher.chan at bradbury.edu.hk>

On Thursday, April 14, 2011 02:54 PM, Sorin Srbu wrote:
>> -----Original Message-----
>> From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf
>> Of Christopher Chan
>> Sent: Wednesday, April 13, 2011 4:49 PM
>> To: centos at centos.org
>> Subject: Re: [CentOS] 40TB File System Recommendations
>>>> While we are at it, disks being directly connected to the raid card will
>>>> mean there won't be bus contention from nics and what not whereas
>>>> software raid 5/6 would have to deal with that.
>>> Could that really be an issue as well? What kind of traffic levels are we
>>> speaking of now? Approximately? That is to say, in as much this can be
>>> quantified at all.
>>> I've never really seen this problem.
>> Oh yeah, we are on PCIe and NUMA architectures now. I guess this point
>> no longer applies just like hardware raid being crap no longer applies
>> because they are not underpowered i960/tiny cache boards anymore.
> I'm sorry, I can't quite "read you". Is your reply meant to be sarcastic? If I
> misunderstood it, I apologize.
> Anyway, what I meant before was that I haven't really the problem with smaller
> systems, like for eg department backups. Maybe up to 10TB-file systems, with not
> too many user's homefolders, in the hundreds maybe, but still a lot of data
> being transferred each day.

I know what you meant...and yes, the bus has plenty of bandwidth to not 
have to worry unless you are sticking it on a 1x lane slot.