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<p class="MsoNormal"><span lang="EN-US">Hi, all:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> I have tested infinispan in distributed mode in terms of latency of put(k,v) operation. The own_num is 1 and the key we put/write locates in the same node as the put operation occurs(In the table,¡°1+0¡± represents
this scenario), the results indicates that the latency increases as the size of the value increases. However the increments seem to be a little ¡°unreasonable¡± to me, because the bandwidth of the memory system is quite huge, and the number of keys (10000)
remains the same during the experiment. So, here is the questions: which operations inside infinspan have strong relatives with the size of value, and why they costs so much as the size increases?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> We have also tested infinispan in the scenario which the key and the put/write(key,value) operation reside in different nodes(we noted it as ¡°0+1¡±). Compared with ¡°1+0¡±, ¡°0+1¡± triggers network communications,
however, the network latency is much smaller compared to the performance gas between the two scenarios. Why this situation happens? For example, with a 25K bytes ping packet, the RTT is about 0.713ms while performance gas between the two scenarios is about
8.4ms</span><span style="font-family:ËÎÌå">£¬</span><span lang="EN-US">what operations inside infinispan used the other 7.6ms? <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> UDP is utilized as the transport protocol, the infinispan version we used is 7.0 and there are 4 nodes in the cluster, each has 10000 keys, all of them have memory bigger than 32G, and all of them have xeon
cpu e5-2407 x2.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<table class="MsoTableGrid" border="1" cellspacing="0" cellpadding="0" style="border-collapse:collapse;border:none">
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<p class="MsoNormal"><span lang="EN-US">Value size<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">250B( us)<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">2.5K( us)<o:p></o:p></span></p>
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<td width="82" valign="top" style="width:61.65pt;border:solid windowtext 1.0pt;border-left:none;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">25k(us)<o:p></o:p></span></p>
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<td width="82" valign="top" style="width:61.65pt;border:solid windowtext 1.0pt;border-left:none;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">250k(us)<o:p></o:p></span></p>
</td>
<td width="82" valign="top" style="width:61.65pt;border:solid windowtext 1.0pt;border-left:none;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">2.5M(us)<o:p></o:p></span></p>
</td>
<td width="82" valign="top" style="width:61.65pt;border:solid windowtext 1.0pt;border-left:none;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">25M(us)<o:p></o:p></span></p>
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</tr>
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<td width="82" valign="top" style="width:61.6pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">1+0<o:p></o:p></span></p>
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<td width="82" valign="top" style="width:61.65pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">463<o:p></o:p></span></p>
</td>
<td width="82" valign="top" style="width:61.65pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">726<o:p></o:p></span></p>
</td>
<td width="82" valign="top" style="width:61.65pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">3 236<o:p></o:p></span></p>
</td>
<td width="82" valign="top" style="width:61.65pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">26 560<o:p></o:p></span></p>
</td>
<td width="82" valign="top" style="width:61.65pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">354 454<o:p></o:p></span></p>
</td>
<td width="82" valign="top" style="width:61.65pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">3 979 830<o:p></o:p></span></p>
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<td width="82" valign="top" style="width:61.6pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">0+1<o:p></o:p></span></p>
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<td width="82" valign="top" style="width:61.65pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">1 807<o:p></o:p></span></p>
</td>
<td width="82" valign="top" style="width:61.65pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">2 829<o:p></o:p></span></p>
</td>
<td width="82" valign="top" style="width:61.65pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">11 635<o:p></o:p></span></p>
</td>
<td width="82" valign="top" style="width:61.65pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">87 540<o:p></o:p></span></p>
</td>
<td width="82" valign="top" style="width:61.65pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">1 035 133<o:p></o:p></span></p>
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<td width="82" valign="top" style="width:61.65pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal"><span lang="EN-US">11 653 389<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> Thanks!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">JR<o:p></o:p></span></p>
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