<html><head><meta http-equiv="Content-Type" content="text/html charset=GB2312"><base href="x-msg://6493/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I don't think RabbitMQ will have linear scalability in any case(ha, non-ha):<div><div>In ha mode, message are broadcast to multiple nodes, so the more node you have, the worse performance you get </div><div>if your setting is to ha all nodes int the cluster;</div><div>In non-ha mode, message data only reside in one queue on only one node, but queue meta are spread to all nodes</div><div>in the cluster, so if adding more nodes, you may got some performance improvement, but not linear improvement.<div apple-content-edited="true"><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><br></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; ">Zhihui Jiao</div>
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<br><div><div>ÔÚ 2013-8-22£¬ÉÏÎç11:15£¬Junius Wang <<a href="mailto:wangjunbo924@gmail.com">wangjunbo924@gmail.com</a>> дµÀ£º</div><br class="Apple-interchange-newline"><blockquote type="cite"><div lang="EN-US" link="blue" vlink="purple" style="font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div class="WordSection1" style="page: WordSection1; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(31, 73, 125); ">I¡¯m sorry to pick this email again because we really want to see any comments from all of you.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(31, 73, 125); ">The key point is that we try to prove the linear scaling of RabbitMQ high availability queues but no lucky. What we see are that:<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in; "><span style="color: rgb(31, 73, 125); "><span>1.<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman'; "> <span class="Apple-converted-space"> </span></span></span></span><span style="color: rgb(31, 73, 125); ">The throughput of two node cluster is 50%-60% worse than a single node broker.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in; "><span style="color: rgb(31, 73, 125); "><span>2.<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman'; "> <span class="Apple-converted-space"> </span></span></span></span><span style="color: rgb(31, 73, 125); ">Adding more node did have improvement on throughput but we only got 25% improvement(throughput of 3 node cluster is 25% better than 2 node cluster. 4 node cluster is 25% better than 3 node cluster too). What we expected is a 45-degree line, that means when 2 nodes are used the throughput is double. With 3 nodes, then triple.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(31, 73, 125); "> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(31, 73, 125); ">Can anybody give any advice? What¡¯s the best practice in using RabbitMQ mirror queues?<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(31, 73, 125); "> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(31, 73, 125); "> </span></div><div><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(181, 196, 223); padding: 3pt 0in 0in; position: static; z-index: auto; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><b><span style="font-size: 10pt; font-family: Tahoma, sans-serif; ">From:</span></b><span style="font-size: 10pt; font-family: Tahoma, sans-serif; "><span class="Apple-converted-space"> </span>Junius Wang [mailto:wangjunbo924@<a href="http://gmail.com" style="color: purple; text-decoration: underline; ">gmail.com</a>]<span class="Apple-converted-space"> </span><br><b>Sent:</b><span class="Apple-converted-space"> </span>Thursday, August 08, 2013 6:50 PM<br><b>To:</b><span class="Apple-converted-space"> </span><a href="mailto:rabbitmq-discuss@lists.rabbitmq.com" style="color: purple; text-decoration: underline; ">rabbitmq-discuss@lists.rabbitmq.com</a><br><b>Subject:</b><span class="Apple-converted-space"> </span>questions about RabbitMQ linear scalability<o:p></o:p></span></div></div></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">Hi guys,<o:p></o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: 9pt; ">Our team are performing some performance tests and we try to prove that we can get linear scalability of our services, it means when we add more RabbitMQ nodes, the throughputs should increase as well. We use RabbitMQ as our backend message system. However, when we add more RabbitMQ servers to cluster, the throughput decreases which is not expected and I would like to ask for your help. Following are the details, any comments are appreciated.<o:p></o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: 9pt; "><o:p> </o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: 9pt; ">We setup the our testing environment on AWS. All instances, including app servers, RabbitMQ servers and Jmeter servers(host test tool Jmeter 2.7), are of type m1.xlarge(8ECUs, 4 Cores and 15Gib memory). For RabbitMQ servers, ¡°EBS optimized¡± are enabled, and the PIOPs are set to 2000 to improve the disc read/write speed. There are two ELBs. One for App servers and the another for RabbitMQ servers. Here are some more environment configurations:<o:p></o:p></div><table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="464" style="width: 348pt; margin-left: -1.15pt; border-collapse: collapse; "><tbody><tr style="height: 15.75pt; "><td width="221" nowrap="" style="width: 166pt; border: 1pt solid windowtext; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">Instances Type<o:p></o:p></span></div></td><td width="243" nowrap="" style="width: 182pt; border-style: solid solid solid none; border-top-color: windowtext; border-right-color: windowtext; border-bottom-color: windowtext; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">m1.xlarge<o:p></o:p></span></div></td></tr><tr style="height: 15.75pt; "><td width="221" nowrap="" style="width: 166pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">connect pool size for App servers<o:p></o:p></span></div></td><td width="243" nowrap="" style="width: 182pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">40000<o:p></o:p></span></div></td></tr><tr style="height: 15.75pt; "><td width="221" nowrap="" style="width: 166pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">JVM args for App servers<o:p></o:p></span></div></td><td width="243" nowrap="" style="width: 182pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="color: rgb(34, 34, 34); ">-Xmx12G -Xms6G -XX:MaxPermSize=2G<o:p></o:p></span></div></td></tr><tr style="height: 15.75pt; "><td width="221" nowrap="" style="width: 166pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">App servers count<o:p></o:p></span></div></td><td width="243" nowrap="" style="width: 182pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">2<o:p></o:p></span></div></td></tr><tr style="height: 15.75pt; "><td width="221" nowrap="" style="width: 166pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">Jmeter servers<o:p></o:p></span></div></td><td width="243" nowrap="" style="width: 182pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">10<o:p></o:p></span></div></td></tr><tr style="height: 15.75pt; "><td width="221" nowrap="" style="width: 166pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">total concurrent users<o:p></o:p></span></div></td><td width="243" nowrap="" style="width: 182pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">4000<o:p></o:p></span></div></td></tr><tr style="height: 15.75pt; "><td width="221" nowrap="" style="width: 166pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">PIOPs for RabbitMQ Servers<o:p></o:p></span></div></td><td width="243" nowrap="" style="width: 182pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">2000<o:p></o:p></span></div></td></tr><tr style="height: 15.75pt; "><td width="221" nowrap="" style="width: 166pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">Consumer Prefetch Count<o:p></o:p></span></div></td><td width="243" nowrap="" style="width: 182pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15.75pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">1000<o:p></o:p></span></div></td></tr><tr style="height: 15pt; "><td width="221" nowrap="" style="width: 166pt; border-style: none solid; border-left-color: windowtext; border-left-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">message size<o:p></o:p></span></div></td><td width="243" nowrap="" style="width: 182pt; border-style: none solid none none; border-right-width: 1pt; border-right-color: windowtext; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">1KB<o:p></o:p></span></div></td></tr><tr style="height: 15pt; "><td width="221" nowrap="" valign="bottom" style="width: 166pt; border: 1pt solid windowtext; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="color: rgb(51, 51, 51); ">hipe_compile<o:p></o:p></span></div></td><td width="243" nowrap="" valign="bottom" style="width: 182pt; border-style: solid solid solid none; border-top-color: windowtext; border-right-color: windowtext; border-bottom-color: windowtext; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">FALSE<o:p></o:p></span></div></td></tr></tbody></table><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: 9pt; "><o:p> </o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">The designed topologic of broker:<o:p></o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span><image001.jpg></span><o:p></o:p></div><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in; "><span>1)<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman'; "> <span class="Apple-converted-space"> </span></span></span>We create only one global topic exchange ¡°events¡± to route all incoming messages. It¡¯s durable.<o:p></o:p></div><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in; "><span>2)<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman'; "> <span class="Apple-converted-space"> </span></span></span>There will be an event log queue which receive all messages with binding key ¡°#¡±. It¡¯s durable as well.<o:p></o:p></div><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in; "><span>3)<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman'; "> <span class="Apple-converted-space"> </span></span></span>There will be several queues for our external services and each service queue may have several bindings to the global exchange which we called eventypes.<o:p></o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">Actually In our test scenarios, we create only one service queue and only one binding on this queue. Message publishers publish messages using the only binding routing key. So<span class="Apple-converted-space"> </span><i><span style="color: red; ">in fact, every message resides on two queues: the event log queue and a test service queue. And all messages are persistent.<o:p></o:p></span></i></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">We start with 1 single RabbitMQ node. And then run different configurations with 2-RabbitMQ node cluster. For example ,1) change the node type 2) enable/disable mirrored queues(also called high available queue, showed as ¡°ha¡± in the following tables). The test results shown as following:<o:p></o:p></div><table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="385" style="width: 288.75pt; margin-left: -1.15pt; border-collapse: collapse; "><tbody><tr style="height: 15pt; "><td width="139" nowrap="" valign="bottom" style="width: 104pt; border: 1pt solid windowtext; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="">configurations<o:p></o:p></span></div></td><td width="162" nowrap="" valign="bottom" style="width: 121.75pt; border-style: solid solid solid none; border-top-color: windowtext; border-right-color: windowtext; border-bottom-color: windowtext; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="">Avg response time(ms)<o:p></o:p></span></div></td><td width="84" nowrap="" valign="bottom" style="width: 63pt; border-style: solid solid solid none; border-top-color: windowtext; border-right-color: windowtext; border-bottom-color: windowtext; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="">Throughput</span><span style="color: rgb(31, 73, 125); ">(requests/sec)</span><span style=""><o:p></o:p></span></div></td></tr><tr style="height: 15pt; "><td width="139" nowrap="" valign="bottom" style="width: 104pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="">1 rabbitmq node<o:p></o:p></span></div></td><td width="162" nowrap="" valign="bottom" style="width: 121.75pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">1125<o:p></o:p></span></div></td><td width="84" nowrap="" valign="bottom" style="width: 63pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="color: red; ">2702.904</span><span style=""><o:p></o:p></span></div></td></tr><tr style="height: 15pt; "><td width="139" nowrap="" valign="bottom" style="width: 104pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="">2disc,ha<o:p></o:p></span></div></td><td width="162" nowrap="" valign="bottom" style="width: 121.75pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">2957<o:p></o:p></span></div></td><td width="84" nowrap="" valign="bottom" style="width: 63pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">1192.645<o:p></o:p></span></div></td></tr><tr style="height: 15pt; "><td width="139" nowrap="" valign="bottom" style="width: 104pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="">1disc+1ram,ha<o:p></o:p></span></div></td><td width="162" nowrap="" valign="bottom" style="width: 121.75pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">3654<o:p></o:p></span></div></td><td width="84" nowrap="" valign="bottom" style="width: 63pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">998.126<o:p></o:p></span></div></td></tr><tr style="height: 15pt; "><td width="139" nowrap="" valign="bottom" style="width: 104pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="">1disc+1ram,non-ha<o:p></o:p></span></div></td><td width="162" nowrap="" valign="bottom" style="width: 121.75pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">1110<o:p></o:p></span></div></td><td width="84" nowrap="" valign="bottom" style="width: 63pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="color: red; ">2799.826</span><span style=""><o:p></o:p></span></div></td></tr><tr style="height: 15pt; "><td width="139" nowrap="" valign="bottom" style="width: 104pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style=""> <o:p></o:p></span></div></td><td width="162" nowrap="" valign="bottom" style="width: 121.75pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">1015<o:p></o:p></span></div></td><td width="84" nowrap="" valign="bottom" style="width: 63pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">2720.422<o:p></o:p></span></div></td></tr><tr style="height: 15pt; "><td width="139" nowrap="" valign="bottom" style="width: 104pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="">2disc,non-ha<o:p></o:p></span></div></td><td width="162" nowrap="" valign="bottom" style="width: 121.75pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">1289<o:p></o:p></span></div></td><td width="84" nowrap="" valign="bottom" style="width: 63pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="color: red; ">2570.826</span><span style=""><o:p></o:p></span></div></td></tr><tr style="height: 15pt; "><td width="139" nowrap="" valign="bottom" style="width: 104pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style=""> <o:p></o:p></span></div></td><td width="162" nowrap="" valign="bottom" style="width: 121.75pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">1080<o:p></o:p></span></div></td><td width="84" nowrap="" valign="bottom" style="width: 63pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">2845.821<o:p></o:p></span></div></td></tr><tr style="height: 15pt; "><td width="139" nowrap="" valign="bottom" style="width: 104pt; border-style: none solid solid; border-right-color: windowtext; border-bottom-color: windowtext; border-left-color: windowtext; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style=""> <o:p></o:p></span></div></td><td width="162" nowrap="" valign="bottom" style="width: 121.75pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">1118<o:p></o:p></span></div></td><td width="84" nowrap="" valign="bottom" style="width: 63pt; border-style: none solid solid none; border-bottom-color: windowtext; border-bottom-width: 1pt; border-right-color: windowtext; border-right-width: 1pt; padding: 0in 5.4pt; height: 15pt; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: right; "><span style="">2802.278<o:p></o:p></span></div></td></tr></tbody></table><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">We can see that, while two rabbitmq servers are used, we see no throughput improvement. This doesn¡¯t make sense to me. To my understanding, Here comes my questions:<o:p></o:p></div><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in; "><span>1.<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman'; "> <span class="Apple-converted-space"> </span></span></span>What does RabbitMQ cluster scalability means exactly? Does it refer to the capacity of handing messages? The queue capacity? Or the message number?<o:p></o:p></div><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in; "><span>2.<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman'; "> <span class="Apple-converted-space"> </span></span></span>The mirrored queues seems to affect performance in a large scale. What¡¯s the possible cause of this?<o:p></o:p></div></div>_______________________________________________<br>rabbitmq-discuss mailing list<br><a href="mailto:rabbitmq-discuss@lists.rabbitmq.com" style="color: purple; text-decoration: underline; ">rabbitmq-discuss@lists.rabbitmq.com</a><br><a href="https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss" style="color: purple; text-decoration: underline; ">https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss</a><br></div></blockquote></div><br></div></div></body></html>