On 05/06/2011 07:08 PM, Sage Weil wrote:
On Fri, 6 May 2011, Fyodor Ustinov wrote:
Hi!
oops. This my misconfiguration.
Out of curiousity, what was the misconfiguration?
I have 20 OSD server. 10 in one vlan and 10 in other (btw, question: mon
server can listen on all ip addressessimultaneously?).
Because our NOC, 10 servers have anisotropic configuration - 800Mbps in
one direction and 150Mbps to another.
Doing a streaming read in 10MB chunks when RBD is striped over 4MB
objects won't be terribly efficient. You should get the best sync read
performance when the object sizes match up. You'll get better performance
if whatever is sitting above the block layer dispatches multiple read
requests in parallel (i.e. something smarter than dd, like a file system).
Hmm. But it's linear read. I do not know how it works internally, but
did reading 10MB by 4MB chunk can not be executed in parallel?
WBR,
Fyodor.
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