Re: [Xen-users] Xen - AoE benchmarks

["Mike Bailey" <mike@xxxxxxxxxxxxx>]

Coraid SR1521's allow you to use two ethernet ports. I would suggest
you give that a try with 2 x 1Gb NICs.

They provide a tool called ddt to do tests with.

Here are some results I got a couple of weeks ago.

- Mike

#
# Xen guest on sm02 with lvm filesystem on 4 disk RAID5
#

root@x4:~/ddt-6# time ddt -t 8g /
Writing to /ddt.3159 ... syncing ... done.
sleeping 10 seconds ... done.
Reading from /ddt.3159 ... done.
8192 MiB  KiB/s    CPU%
Write    52009      7
Read    105424      1

real    4m26.415s
user    0m0.044s
sys     0m11.017s

On Jan 1, 2008 10:57 PM, Ofek Doron [Ofek BIZ] <doron@xxxxxxxx> wrote:
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> Hi shriram,
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> You can find a few benchmarks that I did in the past.
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> I used 1Gbps Ethernet card  (on board in t42 IBM thinkpad and intel pci
> card)
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> I used regular linux distro (Fedora, RHEL, SLES and Open SuSE) and I worked
> with the basic Coraid SR1521 (http://coraid.com/products1.html) .
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> My information is in Hebrew but you don't need Hebrew to read the results .
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> If you have any questions you can e-mail my directly.
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> - doron
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> oops,
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> the link for the benchmarks:
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> http://www.ofek.biz/WiKi/doku.php?id=%D7%91%D7%93%D7%99%D7%A7%D7%95%D7%AA_%D7%91%D7%99%D7%A6%D7%95%D7%A2%D7%99%D7%9D_%D7%A9%D7%9C_coraid_%D7%A2%D7%9D_%D7%9E%D7%A2%D7%A8%D7%9B%D7%95%D7%AA_%D7%9C%D7%99%D7%A0%D7%95%D7%A7%D7%A1
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> XenoCrateS wrote:
>  hi all
> forgive me if this question has already been answered (i couldnt find any
> :( )..
>
> I am working on some xen based cluster where we were thinking of using AoE
> for storage management -rather than pinning a DomU's data partition to the
> same host (same stuff which everybody does)
>
> here comes my question:
> I have read in several places that AoE is sleek and fast for certain
> conditions,etc etc. But i couldnt find any real Xen-AoE combination (or
> atleast linux AoE) benchmarks in the internet.
>
> I managed to stumble upon several Coraid benchmarks - but they arent useful
> at all. because the coraid disks are connected by a MyriNet NIC (i guess
> 1/10 Giga bit nic card) and its their implementation.
>
> I am looking at benchmarks for a simple 100 MBps ethernet lan (or a 1GBps
> ethernet lan) - Dedicated for Aoe, based on the vblade/aoe kernel modules..
> There are no racks/special storage servers. Its just a set of commodity
> machines in the cluster. each machine has a dedicated nic card for aoe
> tasks, while the other is used for cluster communication/ communication to
> the internet.
> -----Note that these machines are also performing computationally intensive
> tasks sometimes.
>
> -----Some things i would definitely like to know are ,
> --If a host A is busy, does it affect the host B's AoE data fetch
> from host A its hard drive significantly?
> --What kind of bandwidths (atleast a ballpark number) can i expect,
> when compared between a in host hard disk access and remote host AoE based
> hard disk access?
>
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> If such bench marks are available anywhere, would somebody please point me
> to the links or any such source where i can dig it from?
>
> thanks in advance.
>
> cheers
> shriram
>
>
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>
>
>
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