Re: [Xen-users] Aoe or iScsi???

[Gilberto Nunes <gilberto.nunes@xxxxxxxxxxxxxxx>]

Just to complemente...

I run bonnie++ like this:

bonnie++ -d /tmp/ -s 1000 -r 500 -n 1 -x 1 -u root |  bon_csv2txt > test.txt

This is the result:

Version  1.03c      ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
bacula-selbet 1000M 53004  98 189796  37 97783  17 62844  99 1505552  99 +++++ +++
                    ------Sequential Create------ --------Random Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files:max:min        /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
bacula-selbetti   1   483   3 +++++ +++   307   1   455   5 +++++ +++   259   0

It's tell something?

Thanks


Em Seg, 2010-07-05 às 14:42 +0200, Bart Coninckx escreveu:
> On Monday 05 July 2010 14:27:20 Gilberto Nunes wrote:
> > I see...
> > 
> > Well... Let me give more details here...
> > 
> > I delivery aoe with a dedicated gigalan crossover between NAS Server and
> > Xen Server...
> > So, all traffic between this two server ran over this cross cable...
> > 
> > The Xen server is a Dell PowerEdge 1950 and NAS Server is an Intel based
> > PC as I said before...
> > 
> > Sometimes, AoE seems lost connection with vblade, then one or two VM get
> > down, and I can't return this VM... So I restart both servers!
> > (Amazing!!)
> > 
> > I looking for better solutions here... Maybe I'll install iSCSI and take
> > some tests...
> > 
> > Thanks for reply...
> > 
> > Em Seg, 2010-07-05 às 14:14 +0200, Bart Coninckx escreveu:
> > > On Monday 05 July 2010 14:08:48 Gilberto Nunes wrote:
> > > > Hi people...
> > > >
> > > > Here we use Xen 4 with Debian Lenny... We're using kernel 2.6.31.13
> > > > pvops...
> > > > As a storage system, we use AoE devices...
> > > > So, we installed VM's on AoE partition... The "NAS" server is a Intel
> > > > based baremetal with SATA hard disc...
> > > >
> > > > However, sometime I feeling that VM's is so slow...
> > > >
> > > > Also, all VM has GPLPV drivers installed...
> > > >
> > > > So, I am thing about change AoE to iSCSCI...
> > > >
> > > > However, I have many doubt with this procedure... Is it iSCSI better
> > > > than AoE???
> > > >
> > > > Please, if someboy can clarify this matter, I'll be very thanks...
> > > >
> > > > Regards
> > > >
> > > >
> > > >
> > > > Gilberto Nunes
> > > > TI
> > > > Selbetti Gestão de Documentos
> > > > Telefone: +55 (47) 3441-6004
> > > > Celular: +55 (47) 8861-6672
> > > >
> > > >
> > > >
> > > >
> > > > _______________________________________________
> > > > Xen-users mailing list
> > > > Xen-users@xxxxxxxxxxxxxxxxxxx
> > > > http://lists.xensource.com/xen-users
> > >
> > > iSCSI will never outperform AoE in my opinion. But in stead of randomly
> > > switching technologies, I think you better try to find the culprit
> > > before. Like your storage itself for instance. SATA is not the fastest.
> > > What  kind of RAID are you using and such ... (iotop?). Also what does
> > > your storage network look like. These can all be bottlenecks.
> > >
> > > B.
> > >
> > > _______________________________________________
> > > Xen-users mailing list
> > > Xen-users@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-users
> > 
> > Gilberto Nunes
> > TI
> > Selbetti Gestão de Documentos
> > Telefone: +55 (47) 3441-6004
> > Celular: +55 (47) 8861-6672
> > 
>
> That's working in reverse order. You need to test the speed of your storage 
> locally first. That means without iSCSI, AoE ot whatever. If this already is 
> slower than your network speed, you can do whatever you want with AoE or 
> iSCSI, it won't matter. Optimally you would test the IOPS, but you will get 
> quite a good indication by running bonnie++ locally. If you hit less than 120 
> MB/sec in reading and/or writing, you have your bottleneck. Changing RAID5 to 
> RAID50 or RAID1 to  RAID10 can then already do a world of good. 
> If that is not the bottleneck, you might consider upgrading your network path 
> by using NIC bonding or multipathing. 
>
>
>
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

Gilberto Nunes
TI
Selbetti Gestão de Documentos
Telefone: +55 (47) 3441-6004
Celular: +55 (47) 8861-6672

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