[Beowulf] VMC - Virtual Machine Console

Peter Skomoroch peter.skomoroch at gmail.com
Fri Mar 7 14:07:51 EST 2008


Here are the results from one pass:

[root at ip-10-251-166-127 bonnie++-1.03a]# ./bonnie++ -d /mnt/bonnie -s 30000
-n 1 -m Fedora6 -x 3 -r 15000 -u lamuser
Using uid:500, gid:500.
name,file_size,putc,putc_cpu,put_block,put_block_cpu,rewrite,rewrite_cpu,getc,getc_cpu,get_block,get_block_cpu,seeks,seeks_cpu,num_files,seq_create,seq_create_cpu,seq_stat,seq_stat_cpu,seq_del,seq_del_cpu,ran_create,ran_create_cpu,ran_stat,ran_stat_cpu,ran_del,ran_del_cpu
Writing with putc()...done
Writing intelligently...done
Rewriting...done
Reading with getc()...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Fedora6,30000M,14984,28,54544,15,22190,1,41469,58,55526,0,176.0
,0,1,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++


On Fri, Mar 7, 2008 at 12:49 PM, Peter Skomoroch <peter.skomoroch at gmail.com>
wrote:

> I'm running bonnie++ on a xlarge instance right now with 30 GB files on
> /mnt.  I'll post the results when it finishes.  I also have Ganglia set up
> on the node, so you can check that out until I shut the instance down:
>
> http://ec2-72-44-53-20.compute-1.amazonaws.com/ganglia
>
>
> On Fri, Mar 7, 2008 at 12:05 PM, Peter Skomoroch <
> peter.skomoroch at gmail.com> wrote:
>
> > Joe, thanks for the feedback.  The bonnie results were not actually
> > mine, I was just pointing to some numbers run by Paul Moen.
> >
> > Your 1GB file data is likely more representative, but with 15 GB ram,
> > > you need to be testing 30-60 GB files.
> > >
> >
> > I'll try to tweak the BPS bonnie tests to run some large files...
> >
> >
> >
> > On Fri, Mar 7, 2008 at 11:57 AM, Joe Landman <
> > landman at scalableinformatics.com> wrote:
> >
> > > Peter Skomoroch wrote:
> > >
> > > > Extra Large Instance:
> > > >
> > > >       15 GB memory
> > > >       8 EC2 Compute Units (4 virtual cores with 2 EC2 Compute Units
> > > each)
> > > >       1,690 GB instance storage (4 x 420 GB plus 10 GB root
> > > partition)
> > > >       64-bit platform
> > > >       I/O Performance: High
> > >
> > > Note:  minor criticism, but overall, nice results.
> > >
> > > Looking over your bonnie results is worth a quick comment.  Any time
> > > you
> > > have bonnie or IOzone (or other IO benchmarks) which are testing file
> > > sizes less than ram size, you are not actually measuring disk IO.
> > >  This
> > > is cache speed pure and simple.  Either page/buffer cache, or RAID
> > > cache, or whatever.
> > >
> > > We have had people tell us to our face that their 2GB file results (on
> > > a
> > > 16 GB RAM machine) were somehow indicative of real file performance,
> > > when, if they walked over to the units they were testing, they would
> > > have noticed the HD lights simply not blinking ...  Yeah, an amusing
> > > beer story (the longer version of it), but a problem none-the-less.
> > >
> > > Your 1GB file data is likely more representative, but with 15 GB ram,
> > > you need to be testing 30-60 GB files.
> > >
> > > Not trying to be a marketing guy here or anything like that ... we
> > > test
> > > our JackRabbit units with 80GB to 1.3TB sized files.  We see
> > > (sustained)
> > > 750 MB/s - 1.3 GB/s in these tests.  We also note some serious issues
> > > with the linux buffer cache and multiple RAID controllers (buffer
> > > cache
> > > appears to serialize access).  We do this as we actually want to
> > > measure
> > > disk performance, and not buffer cache performance.
> > >
> > > That criticism aside, nice results.  It shows what a "cloud" can do.
> > >
> > > >       Price: $0.80 per instance hour
> > >
> > >
> > > --
> > > Joseph Landman, Ph.D
> > > Founder and CEO
> > > Scalable Informatics LLC,
> > > email: landman at scalableinformatics.com
> > > web  : http://www.scalableinformatics.com
> > >        http://jackrabbit.scalableinformatics.com
> > > phone: +1 734 786 8423
> > > fax  : +1 866 888 3112
> > > cell : +1 734 612 4615
> > >
> >
> >
> >
> > --
> > Peter N. Skomoroch
> > peter.skomoroch at gmail.com
> > http://www.datawrangling.com
> >
>
>
>
> --
> Peter N. Skomoroch
> peter.skomoroch at gmail.com
> http://www.datawrangling.com
>



-- 
Peter N. Skomoroch
peter.skomoroch at gmail.com
http://www.datawrangling.com


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