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<div class="moz-cite-prefix">On 30/01/13 14:20 , Darren Moss wrote:<br>
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<div class="WordSection1">We are looking at deploying Riverbed kit
across multiple datacentres, mainly to take advantage of
compression capability from both platform to customer
(applications) and DC to DC (replication of content, SQL, video
SD/HD).<o:p></o:p></div>
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Please note that WAN optimizers these days don't do only
compression.<br>
<br>
The technique they use is data reduction, which is the learning of
the data (which often indeed gets transferred compressed) and next
time when the same data comes by it will send a reference only.<br>
<br>
For example, you send via SMTP a 10 page text-file to your co-worker
in the next room. During the sending of the email the WAN optimizers
learn the data (thus the whole contents of the email goes over the
wire), during the retrieval of the email from the POP3 server the
WAN optimizers have already seen the data (and thus only references
go over the wire).<br>
<br>
Edwin<br>
(Please note: Riverbed TAC person, but not wearing that hat now)<br>
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