Re: [CentOS] Filesystem writes unexpectedly slow (CentOS 6.4)

2014-10-26 Thread SilverTip257
On Fri, Oct 17, 2014 at 5:45 AM, Joakim Ziegler joa...@terminalmx.com wrote: On 16/10/14, 15:35, m.r...@5-cent.us wrote: I missed the beginning of this thread - how is the filesystem mounted? For ext4, we finally found that it worked well... *if* it was mounted nobarrier. That made the

Re: [CentOS] Filesystem writes unexpectedly slow (CentOS 6.4)

2014-10-17 Thread Joakim Ziegler
On 16/10/14, 15:35, m.r...@5-cent.us wrote: I missed the beginning of this thread - how is the filesystem mounted? For ext4, we finally found that it worked well... *if* it was mounted nobarrier. That made the detar of a compressed tar file go from literally 7 minutes to about 30-46 seconds.

Re: [CentOS] Filesystem writes unexpectedly slow (CentOS 6.4)

2014-10-16 Thread Joakim Ziegler
On 14/10/14, 6:45, Peter Kjellström wrote: On Mon, 13 Oct 2014 20:15:11 -0500 Joakim Ziegler joa...@terminalmx.com wrote: ... So, if I use iozone -a to test write speeds on the raw device, I get results in the 500-800MB/sec range, depending on write sizes, which is about what I'd expect.

Re: [CentOS] Filesystem writes unexpectedly slow (CentOS 6.4)

2014-10-14 Thread Peter Kjellström
On Mon, 13 Oct 2014 20:15:11 -0500 Joakim Ziegler joa...@terminalmx.com wrote: ... So, if I use iozone -a to test write speeds on the raw device, I get results in the 500-800MB/sec range, depending on write sizes, which is about what I'd expect. However, when I have an ext4 filesystem on

Re: [CentOS] Filesystem writes unexpectedly slow (CentOS 6.4)

2014-10-13 Thread Keith Keller
On 2014-10-14, Joakim Ziegler joa...@terminalmx.com wrote: So, if I use iozone -a to test write speeds on the raw device, I get results in the 500-800MB/sec range, depending on write sizes, which is about what I'd expect. However, when I have an ext4 filesystem on this device, mounted

Re: [CentOS] Filesystem writes unexpectedly slow (CentOS 6.4)

2014-10-13 Thread Peter
On 10/14/2014 02:15 PM, Joakim Ziegler wrote: I have a rather large box (2x8-core Xeon, 96GB RAM) where I have a couple of disk arrays connected on an Areca controller. I just added a new external array, 8 3TB drives in RAID5, and the testing I'm doing right now is on this array, but this

Re: [CentOS] Filesystem writes unexpectedly slow (CentOS 6.4)

2014-10-13 Thread Joakim Ziegler
On 13/10/14, 21:16, Peter wrote: On 10/14/2014 02:15 PM, Joakim Ziegler wrote: I have a rather large box (2x8-core Xeon, 96GB RAM) where I have a couple of disk arrays connected on an Areca controller. I just added a new external array, 8 3TB drives in RAID5, and the testing I'm doing right now

Re: [CentOS] Filesystem writes unexpectedly slow (CentOS 6.4)

2014-10-13 Thread Joakim Ziegler
On 13/10/14, 20:59, Keith Keller wrote: On 2014-10-14, Joakim Ziegler joa...@terminalmx.com wrote: So, if I use iozone -a to test write speeds on the raw device, I get results in the 500-800MB/sec range, depending on write sizes, which is about what I'd expect. However, when I have an ext4