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Hi everyone,<br>
<br>
I'm testing lustre 2.0 in a pre-production environment and I
encountered some problems.<br>
<br>
My test environment consists of:<br>
1 MDS/MGS (not combined) with 48G of ram and 16 xeon E5520 core<br>
1 OSS with the same characteristics.<br>
1 Client <br>
Both MDS and OSS are connected to an ISCSI shared storage with
different volumes.<br>
<br>
I've also production environment with lustre 1.8.2 and 2 filesystem
served by:<br>
2 MDS/MGS where each server is active for one file system and
passive for other.<br>
2 OSS: Same configuration of MDS.<br>
50 Client that runs apache web-server.<br>
<br>
I've performed a 8 hours stress test in both environment using
apache log's for replicate real traffic, this is the results:<br>
<br>
Lustre 1.8.2<br>
Avg load: on Mds 0,8 on Oss 0,2 and network load on mds (on gigabit
NIC dedicated to lustre traffic) about 50.000 Kb/s.<br>
<br>
Lustre 2.0.0<br>
Avg load: on Mds 2,8 on Oss 0,1 and network load on mds (on gigabit
NIC dedicated to lustre traffic) about 180.000 Kb/s.<br>
<br>
On lustre 2.0 the network traffic is much higher than on Lustre
1.8.2, if we considered that in addition to the stress test, on
Lustre 1.8.2, also production runs, i think there is a problem.<br>
<br>
With TCPDump I saw that when I run multiple "ls -l" on Client
connected to lustre 1.8.2 only some time client send packet to MDS,
with client connected to lustre 2.0 all the time.<br>
<br>
I Think that client 2.0 doesn' t cache files' attr.<br>
<br>
<br>
could someone help me?<br>
Thanks in advice and have a very nice day. ;)<br>
<br>
P.S.<br>
Sorry for my not perfect English.<br>
<br>
<div class="moz-signature">-- <br>
Gianluca Tresoldi<br>
***SysAdmin***<br>
***Demon's Trainer***<br>
Tuttogratis Italia Spa<br>
E-mail: <a class="moz-txt-link-abbreviated" href="mailto:gianluca.tresoldi@tuttogratis.com">gianluca.tresoldi@tuttogratis.com</a><br>
<a class="moz-txt-link-freetext" href="http://www.tuttogratis.it">http://www.tuttogratis.it</a><br>
Tel Centralino 02-57313101<br>
Tel Diretto 02-57313136<br>
<a href="http://www.gnu.org"><img
src="cid:part1.08090104.07040800@tuttogratis.com"></a>Be
open...<br>
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