Re: [CentOS] LVM RAID0 and SSD discards/TRIM

2013-08-23 Thread Joakim Ziegler
Yes, I read that, I was wondering if anyone had actual experience. Lacking that, I tried to just set it up. So far, it seems like it's working, mkfs.ext4 did discards on format, and I can mount with the discard option. I'm currently running some batches on it to see if speeds keeps up, but

Re: [CentOS] LVM RAID0 and SSD discards/TRIM

2013-08-22 Thread natxo asenjo
On 08/21/2013 11:42 PM, Joakim Ziegler wrote: So, can anyone confirm that discards work on ext4 a LVM RAID0 of two SSDs with CentOS 6.4 or the latest ElRepo kernel for Centos 5.8? This should be a fairly simple question, either it works or it doesn't... hi, First hit:

Re: [CentOS] LVM RAID0 and SSD discards/TRIM

2013-08-21 Thread Joakim Ziegler
So, can anyone confirm that discards work on ext4 a LVM RAID0 of two SSDs with CentOS 6.4 or the latest ElRepo kernel for Centos 5.8? This should be a fairly simple question, either it works or it doesn't... -- Joakim Ziegler - Supervisor de postproducción - Terminal joa...@terminalmx.com

Re: [CentOS] LVM RAID0 and SSD discards/TRIM

2013-08-20 Thread Dennis Jacobfeuerborn
On 19.08.2013 20:28, Joakim Ziegler wrote: I'm trying to work out the kinks of a proprietary, old, and clunky application that runs on CentOS. One of its main problems is that it writes image sequences extremely non-linearly and in several passes, using many CPUs, so the sequences get very

Re: [CentOS] LVM RAID0 and SSD discards/TRIM

2013-08-20 Thread Mihamina Rakotomandimby
On 2013-08-20 13:20, Dennis Jacobfeuerborn wrote: On 19.08.2013 20:28, Joakim Ziegler wrote: So, from what I understand, if I can get this thing running on CentOS 6.4, I'll get kernel discard support, and discard support in LVM when running a RAID0. I'm using ext4. Is that correct? Will this

Re: [CentOS] LVM RAID0 and SSD discards/TRIM

2013-08-20 Thread Mihai T. Lazarescu
On Tue, Aug 20, 2013 at 12:20:01PM +0200, Dennis Jacobfeuerborn wrote: On 19.08.2013 20:28, Joakim Ziegler wrote: I'm trying to work out the kinks of a proprietary, old, and clunky application that runs on CentOS. One of its main problems is that it writes image sequences extremely

Re: [CentOS] LVM RAID0 and SSD discards/TRIM

2013-08-20 Thread Joakim Ziegler
These are Crucial M4s. -- Joakim Ziegler - Supervisor de postproducción - Terminal joa...@terminalmx.com - 044 55 2971 8514 - 5264 0864 On 20/08/13 5:20, Dennis Jacobfeuerborn wrote: On 19.08.2013 20:28, Joakim Ziegler wrote: I'm trying to work out the kinks of a proprietary, old,

Re: [CentOS] LVM RAID0 and SSD discards/TRIM

2013-08-20 Thread Joakim Ziegler
On 20/08/13 5:39, Mihai T. Lazarescu wrote: On Tue, Aug 20, 2013 at 12:20:01PM +0200, Dennis Jacobfeuerborn wrote: Is that correct? Will this solve my problem? I want to confirm that discard support works on a RAID0 of SSDs using LVM and ext4 before I start working on getting this legacy

[CentOS] LVM RAID0 and SSD discards/TRIM

2013-08-19 Thread Joakim Ziegler
I'm trying to work out the kinks of a proprietary, old, and clunky application that runs on CentOS. One of its main problems is that it writes image sequences extremely non-linearly and in several passes, using many CPUs, so the sequences get very fragmented. The obvious solution to this seems