From: Phil Turmel <philip@turmel.org>
To: Simon Mcnair <simonmcnair@gmail.com>
Cc: NeilBrown <neilb@suse.de>, linux-raid@vger.kernel.org
Subject: Re: Linux software RAID assistance
Date: Fri, 18 Feb 2011 08:16:19 -0500 [thread overview]
Message-ID: <4D5E7123.5020103@turmel.org> (raw)
In-Reply-To: <AANLkTi=420ttuWWG0vCWy00YLmZvGiM9JTF2n-oi2ebu@mail.gmail.com>
On 02/18/2011 04:31 AM, Simon Mcnair wrote:
> time passes. You are eaten by a Grue. Sheesh this is taking a long time.
>
> simon@proxmox:~$ top
>
> top - 09:26:19 up 20:36, 11 users, load average: 2.46, 2.49, 2.39
> Tasks: 334 total, 9 running, 325 sleeping, 0 stopped, 0 zombie
> Cpu(s): 52.8%us, 9.4%sy, 0.0%ni, 35.2%id, 2.5%wa, 0.0%hi, 0.2%si, 0.0%st
> Mem: 12299244k total, 12227584k used, 71660k free, 11042868k buffers
> Swap: 11534332k total, 0k used, 11534332k free, 208204k cached
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 18896 root 20 0 12288 1072 460 S 63 0.0 431:16.55 ntfs-3g
> 18909 root 20 0 12288 1064 460 R 62 0.0 419:17.11 ntfs-3g
> 18920 root 20 0 12288 1100 492 R 62 0.0 428:17.33 ntfs-3g
> 9210 root 20 0 4068 520 328 S 54 0.0 661:59.92 gzip
> 9138 root 20 0 4068 524 328 R 53 0.0 647:29.07 gzip
> 9247 root 20 0 4068 524 328 S 53 0.0 651:28.36 gzip
> 25678 root 20 0 4068 524 328 R 52 0.0 439:49.20 gzip
> 24957 root 20 0 4068 524 328 R 51 0.0 437:44.01 gzip
> 25792 root 20 0 4068 524 328 S 48 0.0 433:28.14 gzip
>
> This is hardly touching the CPU on the box (in my opinion), any advice
> on using renice ? I've never used it before, but now seems like a
> good time ?
Probably wouldn't help.
You have a total usage of 65%. I suspect that each of the processors running gzip are nearly pegged, and everything else is loafing along. Hit '1' in top to show the CPU usage per-cpu. Single-threaded gzip is holding you back.
If you had enough space for saving the partitions uncompressed, it would be much faster. The PCIe x4 interface on the SuperMicro has a theoretical performance of 1GByte/s, which would be ~ 125MB/s per drive. From what I've read, that card actually delivers ~ 75MB/s per drive when they're all busy.
Phil
next prev parent reply other threads:[~2011-02-18 13:16 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-10 16:16 Linux software RAID assistance Simon McNair
2011-02-10 18:24 ` Phil Turmel
2011-02-15 4:53 ` NeilBrown
2011-02-15 8:48 ` Simon McNair
2011-02-15 14:51 ` Phil Turmel
2011-02-15 19:04 ` Simon McNair
2011-02-15 19:37 ` Phil Turmel
2011-02-15 19:45 ` Roman Mamedov
2011-02-15 21:09 ` Simon McNair
2011-02-17 15:10 ` Simon Mcnair
2011-02-17 15:42 ` Roman Mamedov
2011-02-18 9:13 ` Simon McNair
2011-02-18 9:38 ` Robin Hill
2011-02-18 10:38 ` Simon Mcnair
2011-02-19 11:46 ` Jan Ceuleers
2011-02-19 12:40 ` Simon McNair
2011-02-19 17:37 ` Jan Ceuleers
2011-02-16 13:51 ` Simon McNair
2011-02-16 14:37 ` Phil Turmel
2011-02-16 17:49 ` Simon McNair
2011-02-16 18:14 ` Phil Turmel
2011-02-16 18:18 ` Simon McNair
2011-02-16 18:22 ` Phil Turmel
2011-02-16 18:25 ` Phil Turmel
2011-02-16 18:52 ` Simon McNair
2011-02-16 18:57 ` Phil Turmel
2011-02-16 19:07 ` Simon McNair
2011-02-16 19:10 ` Phil Turmel
2011-02-16 19:15 ` Simon McNair
2011-02-16 19:36 ` Phil Turmel
2011-02-16 21:28 ` Simon McNair
2011-02-16 21:30 ` Phil Turmel
2011-02-16 22:44 ` Simon Mcnair
2011-02-16 23:39 ` Phil Turmel
2011-02-17 13:26 ` Simon Mcnair
2011-02-17 13:48 ` Phil Turmel
2011-02-17 13:56 ` Simon Mcnair
2011-02-17 14:34 ` Simon Mcnair
2011-02-17 16:54 ` Phil Turmel
2011-02-19 8:43 ` Simon Mcnair
2011-02-19 15:30 ` Phil Turmel
[not found] ` <AANLkTinOXJWRw_et2U43R_T9XPBzQLnN56Kf2bOAz=_c@mail.gmail.com>
2011-02-19 16:19 ` Phil Turmel
2011-02-20 9:56 ` Simon Mcnair
2011-02-20 19:50 ` Phil Turmel
2011-02-20 23:17 ` Simon Mcnair
2011-02-20 23:39 ` Phil Turmel
2011-02-22 17:12 ` Simon Mcnair
2011-02-22 17:14 ` Simon Mcnair
2011-02-22 18:23 ` Phil Turmel
2011-02-22 18:36 ` Simon McNair
2011-02-22 19:06 ` Phil Turmel
2011-02-18 9:31 ` Simon Mcnair
2011-02-18 13:16 ` Phil Turmel [this message]
2011-02-18 13:21 ` Roberto Spadim
2011-02-18 13:26 ` Phil Turmel
2011-02-18 13:29 ` Simon Mcnair
2011-02-18 13:34 ` Phil Turmel
2011-02-18 14:12 ` Simon McNair
2011-02-18 16:10 ` Phil Turmel
2011-02-18 16:38 ` Roberto Spadim
[not found] ` <AANLkTi=RmR5nVnmFLuqK5anHc3WDPxjuYjitT6+5wAqS@mail.gmail.com>
2011-02-20 18:48 ` Phil Turmel
2011-02-20 19:25 ` Simon Mcnair
2011-02-19 8:49 ` Simon Mcnair
2011-02-16 13:56 ` Simon McNair
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4D5E7123.5020103@turmel.org \
--to=philip@turmel.org \
--cc=linux-raid@vger.kernel.org \
--cc=neilb@suse.de \
--cc=simonmcnair@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).