<div dir="ltr">Yes we're using raid-10.<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Jul 16, 2013 at 10:17 AM, Steve Holdoway <span dir="ltr"><<a href="mailto:steve@greengecko.co.nz" target="_blank">steve@greengecko.co.nz</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">How are you using them?? Raid 10?<br>
<br>
On the offchance, is<br>
<a href="http://www.greengecko.co.nz/content/western-digital-can-i-have-my-2-days-back" target="_blank">http://www.greengecko.co.nz/content/western-digital-can-i-have-my-2-days-back</a><br>
relevant?<br>
<br>
Cheers,<br>
<br>
Steve<br>
<div class="HOEnZb"><div class="h5"><br>
On Tue, 2013-07-16 at 10:10 +0500, shahzaib shahzaib wrote:<br>
> We're using 4XSata HDD 7200 rpm and yes it is hardly crossing<br>
> 20MB/sec. Could you please guide me a bit about the Max speed of SATA<br>
> read?<br>
><br>
><br>
> Thanks for prompt reply.<br>
><br>
><br>
><br>
> On Tue, Jul 16, 2013 at 10:06 AM, Steve Holdoway<br>
> <<a href="mailto:steve@greengecko.co.nz">steve@greengecko.co.nz</a>> wrote:<br>
> Your disk maxes out at 20MB/sec read?<br>
><br>
> On Tue, 2013-07-16 at 09:59 +0500, shahzaib shahzaib wrote:<br>
> > Hello,<br>
> ><br>
> ><br>
> > We're using nginx-1.2.8 to serve large static files<br>
> for video<br>
> > streaming. However all nginx worker_processes are in "D"<br>
> state and HDD<br>
> > I/O utilization is 99%.<br>
> ><br>
> > [root@DNTX010 ~]# ps aux |grep nginx<br>
> > root 3046 0.0 0.0 20272 688 ? Ss 20:39<br>
> 0:00<br>
> > nginx: master process nginx<br>
> > nginx 3047 3.2 0.9 94480 74808 ? D 20:39<br>
> 0:03<br>
> > nginx: worker process<br>
> > nginx 3048 1.4 0.3 52104 31388 ? D 20:39<br>
> 0:01<br>
> > nginx: worker process<br>
> > nginx 3049 0.2 0.1 33156 12156 ? S 20:39<br>
> 0:00<br>
> > nginx: worker process<br>
> > nginx 3050 0.1 0.1 29968 8844 ? D 20:39<br>
> 0:00<br>
> > nginx: worker process<br>
> > nginx 3051 0.2 0.1 30332 10076 ? D 20:39<br>
> 0:00<br>
> > nginx: worker process<br>
> > nginx 3052 2.7 0.8 91788 69504 ? D 20:39<br>
> 0:02<br>
> > nginx: worker process<br>
> > nginx 3053 0.3 0.0 25632 5384 ? D 20:39<br>
> 0:00<br>
> > nginx: worker process<br>
> > nginx 3054 0.2 0.1 36032 15852 ? D 20:39<br>
> 0:00<br>
> > nginx: worker process<br>
> > nginx 3055 0.4 0.2 37592 17396 ? D 20:39<br>
> 0:00<br>
> > nginx: worker process<br>
> > nginx 3056 0.2 0.1 32580 11028 ? S 20:39<br>
> 0:00<br>
> > nginx: worker process<br>
> > nginx 3057 0.3 0.2 39288 19116 ? D 20:39<br>
> 0:00<br>
> > nginx: worker process<br>
> > nginx 3058 0.3 0.2 41764 19744 ? D 20:39<br>
> 0:00<br>
> > nginx: worker process<br>
> > nginx 3059 0.3 0.1 31124 10480 ? D 20:39<br>
> 0:00<br>
> > nginx: worker process<br>
> > nginx 3060 1.0 0.3 52736 31776 ? D 20:39<br>
> 0:01<br>
> > nginx: worker process<br>
> > nginx 3061 1.1 0.3 51920 29956 ? D 20:39<br>
> 0:01<br>
> > nginx: worker process<br>
> > nginx 3062 1.6 0.4 58808 35548 ? D 20:39<br>
> 0:01<br>
> > nginx: worker process<br>
> ><br>
> ><br>
> > [root@DNTX010 ~]# iostat -x -d 3<br>
> > Linux 2.6.32-358.6.2.el6.x86_64 (DNTX010.local)<br>
> 07/16/2013<br>
> > _x86_64_ (8 CPU)<br>
> ><br>
> > Device: rrqm/s wrqm/s r/s w/s rsec/s<br>
> wsec/s<br>
> > avgrq-sz avgqu-sz await svctm %util<br>
> > sda 30.28 177.37 260.32 2.96 38169.26<br>
> 1442.70<br>
> > 150.46 2.29 8.70 3.52 92.78<br>
> ><br>
> > Device: rrqm/s wrqm/s r/s w/s rsec/s<br>
> wsec/s<br>
> > avgrq-sz avgqu-sz await svctm %util<br>
> > sda 4.33 0.00 544.00 0.00 34376.00<br>
> 0.00<br>
> > 63.19 43.83 75.25 1.84 100.00<br>
> ><br>
> > Device: rrqm/s wrqm/s r/s w/s rsec/s<br>
> wsec/s<br>
> > avgrq-sz avgqu-sz await svctm %util<br>
> > sda 9.00 6.33 547.67 0.67 34637.33<br>
> 56.00<br>
> > 63.27 48.01 86.20 1.82 100.00<br>
> ><br>
> > Device: rrqm/s wrqm/s r/s w/s rsec/s<br>
> wsec/s<br>
> > avgrq-sz avgqu-sz await svctm %util<br>
> > sda 0.00 0.67 568.00 2.33 36024.00<br>
> 29.33<br>
> > 63.21 54.98 101.10 1.75 100.00<br>
> ><br>
> > Device: rrqm/s wrqm/s r/s w/s rsec/s<br>
> wsec/s<br>
> > avgrq-sz avgqu-sz await svctm %util<br>
> > sda 0.00 4.33 560.33 1.33 35712.00<br>
> 45.33<br>
> > 63.66 37.20 65.06 1.78 100.00<br>
> ><br>
> ><br>
> ><br>
> > Nginx.conf :<br>
> ><br>
> > http {<br>
> > include mime.types;<br>
> > default_type application/octet-stream;<br>
> > client_body_buffer_size 128K;<br>
> > sendfile_max_chunk 128k;<br>
> > client_max_body_size 800m;<br>
> > client_header_buffer_size 256k;<br>
> > large_client_header_buffers 4 256k;<br>
> > output_buffers 1 512k;<br>
> > server_tokens off; #Conceals nginx version<br>
> > #access_log logs/access.log main;<br>
> > access_log off;<br>
> > error_log warn;<br>
> > sendfile on;<br>
> ><br>
> > # aio on;<br>
> ><br>
> > # directio 512k;<br>
> ><br>
> > ignore_invalid_headers on;<br>
> > client_header_timeout 3m;<br>
> > client_body_timeout 3m;<br>
> > send_timeout 3m;<br>
> > keepalive_timeout 0;<br>
> > reset_timedout_connection on;<br>
> > }<br>
> ><br>
> ><br>
> > We've also tried enabling aio directive but nothing changed.<br>
> Help will<br>
> > be highly appreciated.<br>
> ><br>
> ><br>
> > Thanks<br>
> > Shahzaib<br>
> ><br>
> ><br>
><br>
> > _______________________________________________<br>
> > nginx mailing list<br>
> > <a href="mailto:nginx@nginx.org">nginx@nginx.org</a><br>
> > <a href="http://mailman.nginx.org/mailman/listinfo/nginx" target="_blank">http://mailman.nginx.org/mailman/listinfo/nginx</a><br>
><br>
> --<br>
> Steve Holdoway BSc(Hons) MNZCS<br>
> <a href="http://www.greengecko.co.nz" target="_blank">http://www.greengecko.co.nz</a><br>
> Linkedin: <a href="http://www.linkedin.com/in/steveholdoway" target="_blank">http://www.linkedin.com/in/steveholdoway</a><br>
> Skype: sholdowa<br>
><br>
> _______________________________________________<br>
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><br>
><br>
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<br>
--<br>
Steve Holdoway BSc(Hons) MNZCS<br>
<a href="http://www.greengecko.co.nz" target="_blank">http://www.greengecko.co.nz</a><br>
Linkedin: <a href="http://www.linkedin.com/in/steveholdoway" target="_blank">http://www.linkedin.com/in/steveholdoway</a><br>
Skype: sholdowa<br>
<br>
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</div></div></blockquote></div><br></div>