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.