Hello,<br><br>With more testing and trying to use another I/O benchmark tool I am more sure that the <br>bonnie++ is not a really good tool for benchmarking, it shows a little bit strange results. Same I can say about iozone. So I did some test with "dd" and reading from .dev.null to file, from file to .dev.null ( to emulate the working of a web server for example and now the results are more believable!. Reading with ~340-350MB/s. Writing: ~120-150MB/s<br>
<br>Thank you.<br>--<br>Maxim Ianoglo<br><br><div class="gmail_quote">On Mon, May 2, 2011 at 4:35 PM, Maxim Ianoglo <span dir="ltr"><<a href="mailto:dotnox@gmail.com">dotnox@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
No. This is output of DRBD state while performing test reading by bonnie++ ( after test writin )<br><br>There is no any "oos" data.<br><br>[root@srv04 ~]$ cat /proc/drbd<br>version: 8.3.10 (api:88/proto:86-96)<br>
GIT-hash: 5c0b0469666682443d4785d90a2c603378f9017b build by <a href="mailto:root@srv04.initalia.com" target="_blank">root@srv04.initalia.com</a>, 2011-04-29 12:14:44<br> 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----<br>
ns:0 nr:50388716 dw:50388716 dr:220 al:0 bm:2 lo:0 pe:0 ua:0 ap:0 ep:1 wo:d oos:0<br>[root@srv04 ~]$ cat /proc/drbd<br>version: 8.3.10 (api:88/proto:86-96)<br>GIT-hash: 5c0b0469666682443d4785d90a2c603378f9017b build by <a href="mailto:root@srv04.initalia.com" target="_blank">root@srv04.initalia.com</a>, 2011-04-29 12:14:44<br>
0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----<br> ns:0 nr:50388716 dw:50388716 dr:220 al:0 bm:2 lo:0 pe:0 ua:0 ap:0 ep:1 wo:d oos:0<br>[root@srv04 ~]$ cat /proc/drbd<br>version: 8.3.10 (api:88/proto:86-96)<br>
GIT-hash: 5c0b0469666682443d4785d90a2c603378f9017b build by <a href="mailto:root@srv04.initalia.com" target="_blank">root@srv04.initalia.com</a>, 2011-04-29 12:14:44<br> 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----<br>
ns:0 nr:50388728 dw:50388728 dr:220 al:0 bm:2 lo:0 pe:0 ua:0 ap:0 ep:1 wo:d oos:0<br>[root@srv04 ~]$ cat /proc/drbd <br>version: 8.3.10 (api:88/proto:86-96)<br>GIT-hash: 5c0b0469666682443d4785d90a2c603378f9017b build by <a href="mailto:root@srv04.initalia.com" target="_blank">root@srv04.initalia.com</a>, 2011-04-29 12:14:44<br>
0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----<br> ns:0 nr:50388728 dw:50388728 dr:220 al:0 bm:2 lo:0 pe:0 ua:0 ap:0 ep:1 wo:d oos:0<br>[root@srv04 ~]$ cat /proc/drbd <br>version: 8.3.10 (api:88/proto:86-96)<br>
GIT-hash: 5c0b0469666682443d4785d90a2c603378f9017b build by <a href="mailto:root@srv04.initalia.com" target="_blank">root@srv04.initalia.com</a>, 2011-04-29 12:14:44<br> 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----<br>
ns:0 nr:50388728 dw:50388728 dr:220 al:0 bm:2 lo:0 pe:0 ua:0 ap:0 ep:1 wo:d oos:0<br><br>--<br><font color="#888888">
Maxim Ianoglo</font><div><div></div><div class="h5"><br><br><br><div class="gmail_quote">On Mon, May 2, 2011 at 2:59 PM, Bart Coninckx <span dir="ltr"><<a href="mailto:bart.coninckx@telenet.be" target="_blank">bart.coninckx@telenet.be</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Because it is syncing?<div><div></div><div><br>
<br>
On 05/02/11 13:45, Maxim Ianoglo wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div></div><div>
Hi,<br>
<br>
Anyway, why I get so big performance difference between ?<br>
On DRBD device with Secondary DRBD host connected: ~80MB/s Read and<br>
~340MB/s Write<br>
On DRBD without Secondary DRBD host connected: ~245MB/s Read and ~340Write<br>
<br>
Thank you.<br>
--<br>
Maxim Ianoglo<br>
<br>
<br>
<br></div></div>
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