I just tried to replicate your iozone problem but I did not have any
luck. Could you list your exact iozone command line arguments?
I assume it is something like this:
cd /mnt/pvfs2
iozone -i 0 -i 1 -t 16
Regarding your distribution question, the "basic_dist" distribution
explicitly uses only one datafile/server. If you want to stripe data
across all of your servers, then you need to use the default
distribution. It is called "simple_stripe", though there isn't normally
any need to specify it explicitly.
-Phil
Wang Yu wrote:
Hi, Rob
When I test IO performance of pvfs2 using iozone(first with '-i 0'
option and then with '-i 1' option), the thread number of iozone is 16.
In this situation, I find that the file generated by iozone can not be
deleted by iozone, and iozone can not go through now. Have you come
across this problem? When the thread number is 1, 4, 8, there is no
problem! How about 32, 64 threads?
Another question, I use setfattr to set "basic_dist" to a directory
/mnt/pvfs2/single. When I use iozone in /mnt/pvfs2/single with the '-t
16' option, the 16 sub-files are stored into only one IO server. Should
pvfs2 distribute all the 16 sub-files to all the IO servers to achieve
high balance and performance? How to tune some parameters?
Thanks!
Regards!
On Jan 22, 2008 4:16 AM, Rob Ross <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Hi,
The order of starting the servers doesn't really matter. You should
only have one line in /etc/pvfs2tab on each client. The hostname can
be any of X, Y, Z, or M.
Rob
On Jan 20, 2008, at 8:49 AM, Wang Yu wrote:
> Hi,all
> Now I have 3 IO servers(X, Y, and Z) and 1 Metadata server(M). And
> I have 4 clients.
> When I run pvfs2-server on these servers, what is the starting order
> of them(X, Y, Z, M)?
> When I configure the file /etc/pvfs2tab in each client, what the
> 'testhost' should be(X, Y or Z)? Should I have three lines in this
> file for X, Y and Z?
>
> Thanks!
> --
> National Research Center for Intelligent Computing Systems
> Institute of Computing Technology, Chinese Academy of Sciences
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--
National Research Center for Intelligent Computing Systems
Institute of Computing Technology, Chinese Academy of Sciences
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