Hi, I currently have a server with two 15,000rpm SAS drives in RAID 1. I am about to purchase a near identical server as I have run out of RAM and HDD space in my first server, and I am interested in finding out whether I can go for slower HDD''s - ie I want to see if the HDD''s in my current server are maxed out. Is there any tool that I can use to benchmark/view the I/O stats of the HDD''s, not for a particular domain, but rather for the entire physical server - ie I want to monitoring the physical HDD''s instead of a VM''s HDD''s. Can I do this through dom0? Can anyone tell me the name of a program that can do this (CentOS 64bit)? And finally, is there a way that I can tell the actual max throughput of my HDD''s so I can see how close to the limit they currently are? Cheers, Andrew _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi Andrew, did you use LVM to provide diskspace to the DomUs, oder file-based-images? With iostat (mostly included in package named sysstat) you can monitor the IOs and IO utilisation for each block device and partition. If you need a benchmark to simulate random IOs, i can suggest you the tool sysbench (http://sysbench.sourceforge.net/). Best Regards Michael Schmidt Am 11.05.10 16:07, schrieb Andrew Kilham:> Hi, > > I currently have a server with two 15,000rpm SAS drives in RAID 1. I > am about to purchase a near identical server as I have run out of RAM > and HDD space in my first server, and I am interested in finding out > whether I can go for slower HDD''s - ie I want to see if the HDD''s in > my current server are maxed out. > > Is there any tool that I can use to benchmark/view the I/O stats of > the HDD''s, not for a particular domain, but rather for the entire > physical server - ie I want to monitoring the physical HDD''s instead > of a VM''s HDD''s. Can I do this through dom0? Can anyone tell me the > name of a program that can do this (CentOS 64bit)? And finally, is > there a way that I can tell the actual max throughput of my HDD''s so I > can see how close to the limit they currently are? > > Cheers, > > Andrew > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi Michael, Thanks for the reply. I did use LVM''s. So I guess what I should do, is run iostat with the domU''s running and check the utilisation, and then shut down all of the domU''s and run a benchmark program to see what the HDD''s are capable of? Cheers, Andrew On 12/05/2010 12:35 AM, Michael Schmidt wrote:> Hi Andrew, > > did you use LVM to provide diskspace to the DomUs, oder > file-based-images? > With iostat (mostly included in package named sysstat) you can monitor > the IOs and IO utilisation for each block device and partition. > If you need a benchmark to simulate random IOs, i can suggest you the > tool sysbench (http://sysbench.sourceforge.net/). > > Best Regards > > Michael Schmidt > > Am 11.05.10 16:07, schrieb Andrew Kilham: >> Hi, >> >> I currently have a server with two 15,000rpm SAS drives in RAID 1. I >> am about to purchase a near identical server as I have run out of RAM >> and HDD space in my first server, and I am interested in finding out >> whether I can go for slower HDD''s - ie I want to see if the HDD''s in >> my current server are maxed out. >> >> Is there any tool that I can use to benchmark/view the I/O stats of >> the HDD''s, not for a particular domain, but rather for the entire >> physical server - ie I want to monitoring the physical HDD''s instead >> of a VM''s HDD''s. Can I do this through dom0? Can anyone tell me the >> name of a program that can do this (CentOS 64bit)? And finally, is >> there a way that I can tell the actual max throughput of my HDD''s so >> I can see how close to the limit they currently are? >> >> Cheers, >> >> Andrew >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xensource.com >> http://lists.xensource.com/xen-users > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.819 / Virus Database: 271.1.1/2868 - Release Date: 05/12/10 04:40:00 > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users