{"id":16949,"date":"2021-01-26T05:00:49","date_gmt":"2021-01-26T05:00:49","guid":{"rendered":"https:\/\/www.sandbox.backupassist.com\/blog\/?p=16949"},"modified":"2021-01-27T01:45:52","modified_gmt":"2021-01-27T01:45:52","slug":"the-effect-of-cpu-on-cloud-backup-and-recovery-speeds-in-backupassist-er","status":"publish","type":"post","link":"https:\/\/www.sandbox.backupassist.com\/blog\/the-effect-of-cpu-on-cloud-backup-and-recovery-speeds-in-backupassist-er","title":{"rendered":"The effect of CPU on cloud backup and recovery speeds in BackupAssist ER"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>TL;DR summary<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>There are several factors that affect the speed of uploading or downloading your full cloud backup. Any one of these can be a bottleneck. These factors are:<\/li><\/ul>\n\n\n\n<ol class=\"wp-block-list\" style=\"padding-left:50px;\"><li>Speed and latency of network connection to your cloud storage provider<br><\/li><li>Speed of the cloud storage provider<br><\/li><li>The size and number of files you back up<br><\/li><li>Number of threads of your CPU<br><\/li><li>Speed of your backup device<\/li><\/ol>\n\n\n\n<ul class=\"wp-block-list\"><li>In most cases, the speed of the network connection will be the limiting factor. However, if your speeds to cloud storage exceed around 200Mbps, then the power of your CPU can start to influence the time to upload or download a backup.<\/li><\/ul>\n\n\n\n<ul class=\"wp-block-list\"><li>When doing a backup, the power of your CPU is unlikely to be something you can change. Further, the duration of the backup is also unlikely to make a tangible difference to business outcomes. So don&#8217;t worry too much about this. \ud83d\ude00<\/li><\/ul>\n\n\n\n<ul class=\"wp-block-list\"><li>When downloading your backup to do a full recovery, the time taken to do the download can make a difference to the time taken to do the recovery, and therefore the amount of downtime you experience. We make these recommendations when downloading your full cloud backup:<\/li><\/ul>\n\n\n\n<ol type=\"1\" style=\"padding-left:50px;\"><li>If your network speed is 100Mbps or less, a more powerful CPU barely makes a difference.<\/li><li>If network speed is between 100Mbps and 500Mbps, we recommend a 4 core \/ 8 thread CPU<\/li><li>If network speed is 500Mbps to 1Gbps, we recommend a 6 core \/ 12 thread CPU.<\/li><li>At gigabit speeds, an 8 core \/ 16 thread CPU is recommended.<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Background \u2013 why CPU makes a difference<\/strong><\/h2>\n\n\n\n<p>When uploading your backup data to the cloud, BackupAssist will perform real-time data processing to convert your files into deduplicated, compressed and encrypted chunks of data.<\/p>\n\n\n\n<p>This process takes a <strong>low to moderate<\/strong> amount of CPU time. However, you may be surprised to learn that the faster data crunching is <strong>not<\/strong> the primary reason why having a more powerful CPU enhances performance.<\/p>\n\n\n\n<p>The primary reason is actually the complex interactions with the cloud storage destination that happen before and after the data crunching is complete.<\/p>\n\n\n\n<p>When uploading and downloading data to your cloud storage, BackupAssist can have 20 or more concurrent connections to your storage provider. Given that the cloud storage can be unpredictable in latency and throughput, there can be \u201crandom\u201d patterns of activity. For example, in the case of downloading a backup:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>\u201cBursty\u201d activity<\/strong>: in the worst case, BackupAssist issues 20 concurrent GET requests to get 20 chunks of data. The cloud storage takes a long time to process them, and completes all of them at exactly the same time. Thus, the local computer\u2019s CPU is idle during that long waiting time, and then a burst of activity happens as the 20 chunks have to be reassembled into data files.<\/li><\/ul>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>\u201cConsistent\u201d activity<\/strong>: in the best case, BackupAssist issues 20 concurrent GET requests, and these requests return results at equal intervals in time. Thus, the local computer\u2019s CPU is working at a consistent rate.<\/li><\/ul>\n\n\n\n<p>In reality, a typical \u201cdownload my entire cloud backup\u201d operation will have periods of time between these two extremes.<\/p>\n\n\n\n<p>The benefit of having a CPU with many cores and threads is that the bottlenecking in the worst case scenario is not as severe or even barely noticeable. Let\u2019s over-simplify it: if there are 20 chunks to process at once, but our CPU can only handle 2 concurrent threads, you can see that it will take 10 \u201cwork cycles\u201d to process all 20. But let\u2019s say we have an 8 core \/ 16 thread CPU \u2013 it would take 1.25 \u201cwork cycles\u201d to process all 20.<\/p>\n\n\n\n<p>If there are other bottlenecks in the system, namely network connection speed, the swings between the two extremes are somewhat \u201cmasked\u201d by the other bottlenecks, so the number of cores or threads will have less impact on performance. But in high performance network environments, the CPU may become the bottleneck.<\/p>\n\n\n\n<p>We should stress that there are many factors that affect performance, but you can consider our explanation above to be a good first-order approximation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Experiments and results<\/strong><\/h2>\n\n\n\n<p>In order to measure the effect of CPU on backup and recovery times, we set up an environment where CPU was going to be the limiting factor.<\/p>\n\n\n\n<ol class=\"wp-block-list\" type=\"1\"><li>Local client machine \u2013 three different CPUs in identical motherboards, with comparable RAM and SSD storage. Three different CPUs were used:<br>    <strong>a.  AMD Ryzen 5 3400G, 4 core \/ 8 thread CPU<br>    b.  AMD Ryzen 5 2600, 6 core \/ 12 thread CPU<br>    c.  AMD Ryzen 7 3800X, 8 core \/ 16 thread CPU<\/strong><br><\/li><li>Network connection \u2013 local area networks were used:<br>    <strong>a.  100 Mbps ethernet network via a 100Mbps switch, with no other computers connected<br>    b.  Gigabit ethernet network with direct cable attaching the client and server computers<\/strong><br><\/li><li>Cloud storage server: a FreeNAS install running on physical hardware, with an Intel 6 core CPU and NVMe SSD storage.<\/li><\/ol>\n\n\n\n<p>We ran backups of the exact same data set in order to obtain the results.<\/p>\n\n\n\n<p>For reference, the data set consisted of:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Windows 10 Operating System<\/li><li>889,836 files, and 521 GB<\/li><li>The data compressed down to 394 GB, and deduplicated further to 334 GB.<\/li><\/ul>\n\n\n\n<p><strong>Table of results<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table is-style-regular\">\n  <table style=\"border-collapse:collapse;border:none;\">\n    <thead>\n      <tr>\n        <th style=\"width:55%;border-collapse:collapse;border:none;background:#008ECE;color:white;\"><strong>Number of CPU threads<\/strong><\/th>\n        <th style=\"width:15%;border-collapse:collapse;border:none;border-left:1px solid white;background:#008ECE;color:white;text-align:center;\"><strong>8<\/strong><\/th>\n        <th style=\"width:15%;border-collapse:collapse;border:none;border-left:1px solid white;background:#008ECE;color:white;text-align:center;\"><strong>12<\/strong><\/th>\n        <th style=\"width:15%;border-collapse:collapse;border:none;border-left:1px solid white;background:#008ECE;color:white;text-align:center;\"><strong>16<\/strong><\/th>\n      <\/tr>\n    <\/thead>\n    <tbody>\n      <tr>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#d1dff1;color:#282561;\">Backup Time &#8211; Gigabit Ethernet<\/td>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#d1dff1;color:#282561;text-align:center;\">3:22:42<\/td>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#d1dff1;color:#282561;text-align:center;\">2:40:41<\/td>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#d1dff1;color:#282561;text-align:center;\">2:19:11<\/td>\n      <\/tr>\n      <tr>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#a9c7e7;color:#282561;color:#282561;\">Recovery Time &#8211; Gigabit Ethernet<\/td>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#a9c7e7;color:#282561;color:#282561;text-align:center;\">3:33:50<\/td>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#a9c7e7;color:#282561;color:#282561;text-align:center;\">3:02:48<\/td>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#a9c7e7;color:#282561;color:#282561;text-align:center;\">2:35:00<\/td>\n      <\/tr>\n      <tr><td colspan=\"4\"><\/td><\/tr>\n      <tr>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#d1dff1;color:#282561;color:#282561;\">Backup Time &#8211; 100Mbps Ethernet<\/td>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#d1dff1;color:#282561;color:#282561;text-align:center;\">9:56:23<\/td>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#d1dff1;color:#282561;color:#282561;text-align:center;\">9:41:56<\/td>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#d1dff1;color:#282561;color:#282561;text-align:center;\">9:28:43<\/td>\n      <\/tr>\n      <tr>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#a9c7e7;color:#282561;color:#282561;\">Recovery Time &#8211; 100Mbps Ethernet<\/td>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#a9c7e7;color:#282561;color:#282561;text-align:center;\">11:08:56<\/td>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#a9c7e7;color:#282561;color:#282561;text-align:center;\">10:59:12<\/td>\n        <td style=\"border-collapse:collapse;border:none;border-left:1px solid white;background:#a9c7e7;color:#282561;color:#282561;text-align:center;\">10:49:16<\/td>\n      <\/tr>\n    <\/tbody>\n  <\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Analysis<\/strong><\/h2>\n\n\n\n<p>In the case of a slower network, 100Mbps, upgrading the CPU from 8 to 16 threads resulted in a reduction in both backup times and recovery times of around 28 minutes and 19 minutes respectively. When expressed as a percentage, the improvement was around 5% and 3%.<\/p>\n\n\n\n<p>In our fast Gigabit network, upgrading the CPU from 8 to 16 threads resulted in a reduction in both backup times and recovery times of around 1h 3m and 59m respectively. That\u2019s a huge 31% and 28% improvement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclusions<\/strong><\/h2>\n\n\n\n<p>Based on the experimental results and knowledge of how our software works, we can offer these recommendations:<\/p>\n\n\n\n<p><strong>Scenario 1: backing up to or recovering from a public cloud via the Internet<\/strong><\/p>\n\n\n\n<p>It\u2019s likely that the speed of your Internet connection, and the latency between your machine and the cloud service will be the limiting factors. You\u2019ll see results similar to our 100 Mbps simulation.<\/p>\n\n\n\n<p>We recommend a 4 core \/ 8 thread CPU machine for doing the backup and recovery. A more powerful CPU will be faster, but not significantly.<\/p>\n\n\n\n<p><strong>Scenario 2: backing up to or recovering from a private cloud via a LAN<\/strong><\/p>\n\n\n\n<p>Let\u2019s assume you have a Gigabit or better network connection. <\/p>\n\n\n\n<p>If your private cloud machine uses a <strong>hard drive<\/strong>, the latency of the hard drive will be the limiting factor. (We\u2019ll write more about this scenario in another blog post.) Here, a 6 core \/ 12 thread CPU will give you good backup and recovery performance, and a more powerful CPU is unlikely to improve that.<\/p>\n\n\n\n<p>If your private cloud machine uses <strong>SSDs<\/strong>, you\u2019ll see a scenario close to our Gigabit ethernet simulation. We recommend an 8 core \/ 16 thread CPU to make sure that the local CPU is not the limiting factor.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Using the D2D2C capability of BackupAssist ER is a great way to get your full system backups into the cloud. If you\u2019re seeking the ultimate performance for backup or recovery, it\u2019s worth noting that the speed of the CPU on the client machine can make a difference in high performance network environments. Here\u2019s some pointers on how to get the most out of BackupAssist ER.<\/p>\n","protected":false},"author":17,"featured_media":16980,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[757],"tags":[],"class_list":["post-16949","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cyber-resilience"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>The effect of CPU on cloud backup and recovery speeds in BackupAssist ER - Cyber Resilience Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sandbox.backupassist.com\/blog\/the-effect-of-cpu-on-cloud-backup-and-recovery-speeds-in-backupassist-er\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The effect of CPU on cloud backup and recovery speeds in BackupAssist ER - Cyber Resilience Blog\" \/>\n<meta property=\"og:description\" content=\"Using the D2D2C capability of BackupAssist ER is a great way to get your full system backups into the cloud. If you\u2019re seeking the ultimate performance for backup or recovery, it\u2019s worth noting that the speed of the CPU on the client machine can make a difference in high performance network environments. 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