{"id":33491,"date":"2019-10-31T21:52:52","date_gmt":"2019-10-31T18:52:52","guid":{"rendered":"https:\/\/prohoster.info\/blog\/rossijskaya-shd-aerodisk-nagruzochnoe-testirovanie-vyzhimaem-iops-y\/"},"modified":"2019-10-31T21:52:52","modified_gmt":"2019-10-31T18:52:52","slug":"rossijskaya-shd-aerodisk-nagruzochnoe-testirovanie-vyzhimaem-iops-y","status":"publish","type":"post","link":"https:\/\/prohoster.info\/en\/blog\/administrirovanie\/rossijskaya-shd-aerodisk-nagruzochnoe-testirovanie-vyzhimaem-iops-y","title":{"rendered":"Russian Storage System AERODISK: load testing. We push the IOPS to the limit","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Russian Storage System AERODISK: load testing. We push the IOPS to the limit\" src=\"\/wp-content\/uploads\/2019\/05\/c18b0a93e4cd676317b37b1cd196ca59.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Hello everyone! As promised, we are publishing the results of the load test for the data storage system produced in Russia \u2013 AERODISK ENGINE N2.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p>In the previous article, we conducted stress tests on the storage system (i.e., crash tests) and the results were positive (meaning we didn't break the storage system). You can review the crash test results <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/aerodisk\/blog\/447070\/\">HERE<\/a><\/noindex>.<\/p>\n<p><\/p>\n<p>In the comments to the previous article, there were requests for additional \u2013 more complex crash tests. We have noted them all and will definitely implement them in one of the upcoming articles. At the same time, you can visit our lab in Moscow at any time (in person or remotely via the Internet) and conduct these tests yourself (you can even tailor the testing for a specific project :-)). Contact us, and we will consider all scenarios! <\/p>\n<p><\/p>\n<p>Additionally, if you're not in Moscow, you can still get to know our storage system better by attending a free training event at the competency center in the nearest city to you.<\/p>\n<p><\/p>\n<p>Below is the list of upcoming events and the dates for the competency centers.<\/p>\n<p><\/p>\n<ul>\n<li>Yekaterinburg. May 16, 2019. Training seminar. You can register via the link: <noindex><a rel=\"nofollow\" href=\"https:\/\/aerodisk.promo\/ekb\/\">https:\/\/aerodisk.promo\/ekb\/ <\/a><\/noindex><\/li>\n<li>Yekaterinburg. May 20 \u2013 June 21, 2019. Competency center. Come at any working time for a live demonstration of the AERODISK ENGINE N2 storage system. The exact address and registration link will be provided later. Stay tuned for updates.<\/li>\n<li>Novosibirsk. STAY TUNED FOR INFORMATION ON OUR WEBSITE or on Habr.<br \/>\nOctober 2019<\/li>\n<li>Kazan. STAY TUNED FOR INFORMATION ON OUR WEBSITE or on Habr.<br \/>\nOctober 2019<\/li>\n<li>Krasnoyarsk. STAY TUNED FOR INFORMATION ON OUR WEBSITE or on Habr.<br \/>\nNovember 2019<\/li>\n<\/ul>\n<p><\/p>\n<p>We also want to share another piece of good news: our <noindex><a rel=\"nofollow\" href=\"https:\/\/www.youtube.com\/channel\/UCOnFSximR_IIBQVhAc6909g\">YouTube<\/a><\/noindex> channel is now fully operational, where you can watch videos from past events. We regularly upload our training videos there as well.<\/p>\n<p><\/p>\n<h2 id=\"testovyy-stend\">Test Stand<\/h2>\n<p><\/p>\n<p>So, back to the tests. We upgraded our laboratory storage system ENGINE N2 by installing additional SAS SSD drives, as well as Fibre Channel 16G front-end adapters. Similarly, we upgraded the server from which we will generate load by adding FC 16G adapters.<\/p>\n<p><\/p>\n<p>As a result, we have a 2-controller storage system in the lab with 24 SAS SSD disks of 1.6 TB each, 3 DWPD, connected via SAN switches to a physical Linux server over FC 16G.<br \/>\nThe diagram of the test bench is shown below.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Russian Storage System AERODISK: load testing. We push the IOPS to the limit\" src=\"\/wp-content\/uploads\/2019\/05\/3c2333896b91cc3ff3902b3899a37ada.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<h2 id=\"metodika-testirovaniya\">Testing methodology<\/h2>\n<p><\/p>\n<p>For optimal block access performance, we will use DDP (Dynamic Disk Pools), which we initially created for ALL-FLASH systems.<br \/>\nFor testing, we created two LUNs of 1 TB each with RAID-10 protection. Each LUN will be \"spread\" across 12 disks (24 in total) to fully utilize the potential of each of the installed disks in the storage system. <\/p>\n<p><\/p>\n<p>The LUNs are presented to the server through different controllers to maximize the utilization of storage system resources. <\/p>\n<p><\/p>\n<p>Each test will last one hour, and the tests will be performed using the Flexible IO (FIO) program, with FIO data being automatically exported to Excel, where graphs are generated for clarity. <\/p>\n<p><\/p>\n<h3 id=\"profili-nagruzki\">Load profiles<\/h3>\n<p><\/p>\n<p>In total, we will conduct three tests lasting one hour each, not including the warm-up time, which we allocate 15 minutes (the time needed to warm up the array of 24 SSD disks). These tests emulate the most common load profiles we encounter, specifically various DBMS, video surveillance systems, media content streaming, and backup. <\/p>\n<p><\/p>\n<p>In all tests, we have deliberately disabled the caching capability in RAM on both the storage system and the host. This will, understandably, degrade the results, but in our view, this condition will make the test more honest. <\/p>\n<p><\/p>\n<h2 id=\"rezultaty-testov\">Test results<\/h2>\n<p><\/p>\n<p><strong>Test #1. Random load with small blocks.<\/strong> Emulation of a high-load transactional DBMS. <\/p>\n<p><\/p>\n<ul>\n<li>Block size = 4k <\/li>\n<li>Read\/Write = 70%\/30%<\/li>\n<li>Number of operations = 16<\/li>\n<li>Queue depth = 32<\/li>\n<li>Load characteristic = Full Random<\/li>\n<\/ul>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Russian Storage System AERODISK: load testing. We push the IOPS to the limit\" src=\"\/wp-content\/uploads\/2019\/05\/320420d63cb9cd9a97c685dafa9e612f.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Russian Storage System AERODISK: load testing. We push the IOPS to the limit\" src=\"\/wp-content\/uploads\/2019\/05\/4c6ce3859fcdb3d597c111f117c55e7f.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Test results:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Russian Storage System AERODISK: load testing. We push the IOPS to the limit\" src=\"\/wp-content\/uploads\/2019\/05\/feb7948d1f43d259398fce3c82c95a3e.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>In total, with the lower mid-range Engine N2 system, we achieved 438k IOPS with a latency of 2.6 milliseconds. Considering the class of the system, we believe the result is quite commendable. To understand if this is the system's limit, we will look at the utilization of the storage controllers' resources.<\/p>\n<p><\/p>\n<p>We are primarily interested in CPU utilization, since, as noted above, we deliberately disabled the RAM cache to avoid distorting the test results.<\/p>\n<p><\/p>\n<p>On both storage controllers, we see approximately the same picture.<\/p>\n<p><\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/habrastorage.org\/webt\/st\/dr\/r2\/stdrr25vmyjtez-hc9kwlridbk0.png\"><img decoding=\"async\" alt=\"Russian Storage System AERODISK: load testing. We push the IOPS to the limit\" src=\"\/wp-content\/uploads\/2019\/05\/79cd4e885ef7c56fc198462cd4bedaeb.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/p>\n<p><\/p>\n<p>This means the CPU load is at 50%. This indicates that this storage system still has plenty of capacity and can be easily scaled further. To give a hint of what\u2019s to come: all subsequent tests also showed the controller CPUs under a load of around 50%, so we won't repeat those results.<\/p>\n<p><\/p>\n<p>Based on our lab tests, the comfortable limit for the AERODISK Engine N2 system, when considering random IOPS at 4k block sizes, is approximately 700,000 IOPS. If that's not enough and you're aiming for a million, we have the higher model, the ENGINE N4. <\/p>\n<p><\/p>\n<p>So, the story about millions of IOPS pertains to the ENGINE N4, but if a million is too much for you, feel free to use the N2.<\/p>\n<p><\/p>\n<p>Let's return to the tests.<\/p>\n<p><\/p>\n<p><strong>Test #2. Sequential writing with large blocks.<\/strong> Emulating video surveillance systems, loading data into analytical databases, or writing backups.<\/p>\n<p><\/p>\n<p>In this test, we are no longer interested in IOPS, as they make no sense under sequential large block load. What we are primarily interested in are: write throughput (megabytes per second) and latencies, which will naturally be higher for large blocks than for small ones.<\/p>\n<p><\/p>\n<ul>\n<li>Block size = 128k <\/li>\n<li>Read\/Write = 0%\/100%<\/li>\n<li>Number of operations = 16<\/li>\n<li>Queue depth = 32<\/li>\n<li>Load characteristic \u2013 Sequential<\/li>\n<\/ul>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Russian Storage System AERODISK: load testing. We push the IOPS to the limit\" src=\"\/wp-content\/uploads\/2019\/05\/7e0b29ca7a48d82a7a47e7bfcf548aa3.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Russian Storage System AERODISK: load testing. We push the IOPS to the limit\" src=\"\/wp-content\/uploads\/2019\/05\/ec509595a7a73f073790c68d7b81ce9c.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Russian Storage System AERODISK: load testing. We push the IOPS to the limit\" src=\"\/wp-content\/uploads\/2019\/05\/5966ed7d7b949f24a31f5f56a6246571.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>In total: we have a write speed of five and a half gigabytes per second with latencies of eleven milliseconds. Compared to our closest foreign competitors, this result is excellent in our opinion, and also not the limit of the ENGINE N2 system.<\/p>\n<p><\/p>\n<p><strong>Test #3. Sequential reading with large blocks.<\/strong> Emulating media content streaming, generating reports from analytical databases, or recovering data from backups. <\/p>\n<p><\/p>\n<p>As in the previous test, we are interested in the throughput and latencies.<\/p>\n<p><\/p>\n<ul>\n<li>Block size = 128k <\/li>\n<li>Read\/Write = 100%\/0%<\/li>\n<li>Number of operations = 16<\/li>\n<li>Queue depth = 32<\/li>\n<li>Load characteristic \u2013 Sequential<\/li>\n<\/ul>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Russian Storage System AERODISK: load testing. We push the IOPS to the limit\" src=\"\/wp-content\/uploads\/2019\/05\/2a3ec3b4d9625799c819a06bdf26cff3.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Russian Storage System AERODISK: load testing. We push the IOPS to the limit\" src=\"\/wp-content\/uploads\/2019\/05\/0301c7e8da3d88ad23a82739d10635e9.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Russian Storage System AERODISK: load testing. We push the IOPS to the limit\" src=\"\/wp-content\/uploads\/2019\/05\/a992a8cf4ec8d3368107f5c965d1d4d5.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>The streaming read metrics are predictably slightly better than the streaming write metrics.<\/p>\n<p><\/p>\n<p>Interestingly, the latency metric throughout the test is identical (a straight line). This is not an error; under sequential reading with large blocks, this is the usual situation. <\/p>\n<p><\/p>\n<p>Of course, if we leave the system in this state for a couple of weeks, we will ultimately see periodic spikes on the graphs related to external factors. But overall, they will not affect the overall picture.<\/p>\n<p><\/p>\n<h2 id=\"vyvody\">Conclusions<\/h2>\n<p><\/p>\n<p>With the dual-controller system AERODISK ENGINE N2, we were able to achieve impressive results (~438,000 IOPS and ~5-6 gigabytes per second). Load tests showed that we are definitely proud of our storage solution. On the contrary, the metrics are very commendable and align with a good storage system. <\/p>\n<p><\/p>\n<p>Although, as we mentioned earlier, the Engine N2 is the entry-level model, and the results presented in this article are not its limit. We will publish a similar test with our higher-tier system, ENGINE N4, later. <\/p>\n<p><\/p>\n<p>Naturally, we cannot cover all possible tests within a single article, so we once again invite readers to share their wishes for future tests in the comments. We will certainly take them into account in our upcoming publications. <\/p>\n<p><\/p>\n<p>In addition, we remind you that this year we are actively engaged in training, so we invite you to our competence centers where you can receive training on AERODISK storage solutions, and also have an interesting and fun time. <\/p>\n<p><\/p>\n<p>I am repeating the information about the upcoming training events. <\/p>\n<p><\/p>\n<ul>\n<li>Yekaterinburg. May 16, 2019. Training seminar. You can register via the link: <noindex><a rel=\"nofollow\" href=\"https:\/\/aerodisk.promo\/ekb\/\">https:\/\/aerodisk.promo\/ekb\/ <\/a><\/noindex><\/li>\n<li>Yekaterinburg. May 20 \u2013 June 21, 2019. Competency center. Come at any working time for a live demonstration of the AERODISK ENGINE N2 storage system. The exact address and registration link will be provided later. Stay tuned for updates.<\/li>\n<li>Novosibirsk. STAY TUNED FOR INFORMATION ON OUR WEBSITE or on Habr.<br \/>\nOctober 2019<\/li>\n<li>Kazan. STAY TUNED FOR INFORMATION ON OUR WEBSITE or on Habr.<br \/>\nOctober 2019<\/li>\n<li>Krasnoyarsk. STAY TUNED FOR INFORMATION ON OUR WEBSITE or on Habr.<br \/>\nNovember 2019<\/li>\n<\/ul>\n<p>Source: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/aerodisk\/blog\/451456\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u0441\u0435\u043c \u043f\u0440\u0438\u0432\u0435\u0442! \u041a\u0430\u043a \u0438 \u043e\u0431\u0435\u0449\u0430\u043b\u0438, \u043f\u0443\u0431\u043b\u0438\u043a\u0443\u0435\u043c \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u043d\u0430\u0433\u0440\u0443\u0437\u043e\u0447\u043d\u043e\u0433\u043e \u0442\u0435\u0441\u0442\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u0440\u043e\u0441\u0441\u0438\u0439\u0441\u043a\u043e\u0433\u043e \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0441\u0442\u0432\u0430 \u2013 AERODISK ENGINE N2. \u0412 \u043f\u0440\u043e\u0448\u043b\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u043c\u044b \u043b\u043e\u043c\u0430\u043b\u0438 \u0421\u0425\u0414 (\u0442.\u0435. \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u043b\u0438 \u043a\u0440\u0430\u0448-\u0442\u0435\u0441\u0442\u044b) \u0438 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u043a\u0440\u0430\u0448-\u0442\u0435\u0441\u0442\u0430 \u0431\u044b\u043b\u0438 \u043f\u043e\u043b\u043e\u0436\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u043c\u0438 (\u0442\u043e \u0435\u0441\u0442\u044c, \u0421\u0425\u0414 \u043c\u044b \u0442\u0430\u043a \u0438 \u043d\u0435 \u0441\u043b\u043e\u043c\u0430\u043b\u0438). \u0421 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0430\u043c\u0438 \u043a\u0440\u0430\u0448-\u0442\u0435\u0441\u0442\u0430 \u043c\u043e\u0436\u043d\u043e \u043e\u0437\u043d\u0430\u043a\u043e\u043c\u0438\u0442\u044c\u0441\u044f \u0417\u0414\u0415\u0421\u042c. \u0412 \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f\u0445 \u043a \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0435\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u0431\u044b\u043b\u0438 \u0432\u044b\u0441\u043a\u0430\u0437\u0430\u043d\u044b \u043f\u043e\u0436\u0435\u043b\u0430\u043d\u0438\u044f \u043e [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25193,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-33491","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - 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