{"id":19896,"date":"2026-04-22T16:36:56","date_gmt":"2026-04-22T13:36:56","guid":{"rendered":"https:\/\/unihost.com\/help\/?p=19896"},"modified":"2026-04-22T16:36:56","modified_gmt":"2026-04-22T13:36:56","slug":"configuring-two-tier-backup-in-proxmox-backup-server","status":"publish","type":"post","link":"https:\/\/unihost.com\/help\/configuring-two-tier-backup-in-proxmox-backup-server\/","title":{"rendered":"Configuring Two-Tier Backup in Proxmox Backup Server"},"content":{"rendered":"<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">In the previous articles, we covered the basic <a href=\"https:\/\/unihost.com\/help\/virtual-infrastructure-for-small-and-medium-sized-businesses-on-proxmox-ve\/\" target=\"_blank\" rel=\"noopener\">virtual infrastructure<\/a> layout and the setup of an environment for remote work. Now we move on to the final stage \u2014 organizing backup for virtual machines. This is necessary to protect production systems from unexpected failures, configuration mistakes, unsuccessful updates, and other situations that can lead to data loss or service downtime. First, we will configure local backups, and then we will add a second layer of protection \u2014 an external copy in S3-compatible storage.<\/span><\/p>\n<h2><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">How the setup works<\/span><\/h2>\n<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">This configuration uses the following logic:<\/span><\/p>\n<ul>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Proxmox VE sends virtual machine backups to a local datastore, for example pbs-local<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">after the backup is completed, PBS maintenance tasks are run: <strong>Prune<\/strong> and <strong>Garbage Collection<\/strong><\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">then a <strong>Sync Job<\/strong> is started, which copies the data from pbs-local to a second datastore, for example pbs-s3<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">the second datastore uses S3-compatible object storage as its backend<\/span><\/li>\n<\/ul>\n<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">As a result, the local backup process remains fast, while the external copy is created afterwards and does not affect the running virtual machines.<\/span><\/p>\n<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19890\" src=\"https:\/\/unihost.com\/help\/minio.php?2026\/04\/Screenshot-at-10-30-16.png\" alt=\"Configuring Two-Tier Backup in Proxmox Backup Server - Image 1\" width=\"267\" height=\"234\" \/ title=\"Configuring Two-Tier Backup in Proxmox Backup Server - Image 1\"><\/span><\/p>\n<h2 data-section-id=\"968ygc\" data-start=\"0\" data-end=\"40\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Step 0. Install Proxmox Backup Server<\/span><\/h2>\n<p data-start=\"42\" data-end=\"313\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Before configuring backups, you first need to install Proxmox Backup Server. In our setup, it is used locally on the same server as the main infrastructure, because this is the model in which we first create fast local backups and only then add an external storage layer.<\/span><\/p>\n<p data-start=\"315\" data-end=\"492\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">You can find the step-by-step installation process for Proxmox Backup Server in the official Proxmox documentation at this link:<\/span><br data-start=\"443\" data-end=\"446\" \/><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><a class=\"decorated-link\" href=\"https:\/\/pbs.proxmox.com\/docs\/installation.html?utm_source=chatgpt.com\" target=\"_new\" rel=\"noopener nofollow noopener noreferrer\" data-start=\"446\" data-end=\"492\">https:\/\/pbs.proxmox.com\/docs\/installation.html<\/a><\/span><\/p>\n<p data-start=\"494\" data-end=\"641\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">In this example, we assume that Proxmox Backup Server is already installed, accessible through the web interface, and ready for datastore creation.<\/span><\/p>\n<h2 data-section-id=\"f2rieh\" data-start=\"643\" data-end=\"685\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Step 1. Create a local datastore in PBS<\/span><\/h2>\n<section class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto [content-visibility:auto] supports-[content-visibility:auto]:[contain-intrinsic-size:auto_100lvh] R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-69df5660-de20-8395-9948-4081a1a07c05-16\" data-testid=\"conversation-turn-248\" data-scroll-anchor=\"false\" data-turn=\"assistant\">\n<div class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\">\n<div class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\">\n<div class=\"flex max-w-full flex-col gap-4 grow\">\n<div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+&amp;]:mt-1\" dir=\"auto\" tabindex=\"0\" data-message-author-role=\"assistant\" data-message-id=\"36687646-a339-40e3-b294-7fffe9fffc24\" data-message-model-slug=\"gpt-5-4-thinking\" data-turn-start-message=\"true\">\n<div class=\"flex w-full flex-col gap-1 empty:hidden\">\n<div class=\"markdown prose dark:prose-invert w-full wrap-break-word dark markdown-new-styling\">\n<p data-start=\"0\" data-end=\"99\" data-is-last-node=\"\" data-is-only-node=\"\">First, create a standard datastore in PBS that will be used to store local backups from Proxmox VE.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<p data-start=\"795\" data-end=\"834\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">In the Proxmox Backup Server interface:<\/span><\/p>\n<ul data-start=\"836\" data-end=\"1047\">\n<li data-section-id=\"1q7zxu\" data-start=\"836\" data-end=\"860\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">open <strong data-start=\"843\" data-end=\"860\">Add Datastore<\/strong><\/span><\/li>\n<li data-section-id=\"1taqa3p\" data-start=\"861\" data-end=\"915\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">in the <strong data-start=\"870\" data-end=\"878\">Name<\/strong> field, enter for example pbs-local<\/span><\/li>\n<li data-section-id=\"hyznzj\" data-start=\"916\" data-end=\"1026\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">in the <strong data-start=\"925\" data-end=\"941\">Backing Path<\/strong> field, specify the path to the local storage directory, for example \/mnt\/pbs-local<\/span><\/li>\n<li data-section-id=\"pqyjj3\" data-start=\"1027\" data-end=\"1047\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">save the datastore<\/span><\/li>\n<\/ul>\n<p data-start=\"1049\" data-end=\"1139\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">This datastore should be located on a local disk or on a separate partition of the server.<\/span><\/p>\n<h2 data-section-id=\"pdt49j\" data-start=\"1141\" data-end=\"1193\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Step 2. Add the local PBS datastore to Proxmox VE<\/span><\/h2>\n<p data-start=\"1195\" data-end=\"1284\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">After creating the datastore, it needs to be connected to Proxmox VE as a backup storage.<\/span><\/p>\n<p data-start=\"1286\" data-end=\"1300\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">In Proxmox VE:<\/span><\/p>\n<ul data-start=\"1302\" data-end=\"1673\">\n<li data-section-id=\"29jygb\" data-start=\"1302\" data-end=\"1334\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">go to <strong data-start=\"1310\" data-end=\"1334\">Datacenter \u2192 Storage<\/strong><\/span><\/li>\n<li data-section-id=\"1yb548h\" data-start=\"1335\" data-end=\"1374\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">click <strong data-start=\"1343\" data-end=\"1374\">Add \u2192 Proxmox Backup Server<\/strong><\/span><\/li>\n<li data-section-id=\"ftv80o\" data-start=\"1375\" data-end=\"1657\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">fill in the fields:<\/span>\n<ul data-start=\"1399\" data-end=\"1657\">\n<li data-section-id=\"dvf7yl\" data-start=\"1399\" data-end=\"1432\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"1401\" data-end=\"1407\">ID<\/strong>: for example pbs-local<\/span><\/li>\n<li data-section-id=\"1ybxpdf\" data-start=\"1435\" data-end=\"1506\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"1437\" data-end=\"1447\">Server<\/strong>: the PBS address, for example localhost or the server IP<\/span><\/li>\n<li data-section-id=\"1h28099\" data-start=\"1509\" data-end=\"1537\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"1511\" data-end=\"1523\">Username<\/strong>: the PBS user<\/span><\/li>\n<li data-section-id=\"szlyka\" data-start=\"1540\" data-end=\"1573\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"1542\" data-end=\"1554\">Password<\/strong>: the user password<\/span><\/li>\n<li data-section-id=\"1fswrlo\" data-start=\"1576\" data-end=\"1604\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"1578\" data-end=\"1591\">Datastore<\/strong>: pbs-local<\/span><\/li>\n<li data-section-id=\"11f6xof\" data-start=\"1607\" data-end=\"1657\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"1609\" data-end=\"1624\">Fingerprint<\/strong>: the PBS certificate fingerprint<\/span><\/li>\n<\/ul>\n<\/li>\n<li data-section-id=\"165m32f\" data-start=\"1658\" data-end=\"1673\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">click <strong data-start=\"1666\" data-end=\"1673\">Add<\/strong><\/span><\/li>\n<\/ul>\n<p data-start=\"1675\" data-end=\"1769\" data-is-last-node=\"\" data-is-only-node=\"\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">After that, the pbs-local storage will appear in the list of storage backends in Proxmox VE.<\/span><\/p>\n<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19891\" src=\"https:\/\/unihost.com\/help\/minio.php?2026\/04\/Screenshot-at-10-30-38.png\" alt=\"Configuring Two-Tier Backup in Proxmox Backup Server - Image 2\" width=\"960\" height=\"517\" \/ title=\"Configuring Two-Tier Backup in Proxmox Backup Server - Image 2\"><\/span><\/p>\n<h2 data-section-id=\"z1qu2l\" data-start=\"0\" data-end=\"44\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Step 3. Create a backup job in Proxmox VE<\/span><\/h2>\n<p data-start=\"46\" data-end=\"134\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Now you need to configure regular backup of virtual machines to the local PBS datastore.<\/span><\/p>\n<p data-start=\"136\" data-end=\"150\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">In Proxmox VE:<\/span><\/p>\n<ul data-start=\"152\" data-end=\"431\">\n<li data-section-id=\"1tjftoc\" data-start=\"152\" data-end=\"183\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">go to <strong data-start=\"160\" data-end=\"183\">Datacenter \u2192 Backup<\/strong><\/span><\/li>\n<li data-section-id=\"165m32f\" data-start=\"184\" data-end=\"199\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">click <strong data-start=\"192\" data-end=\"199\">Add<\/strong><\/span><\/li>\n<li data-section-id=\"tewma4\" data-start=\"200\" data-end=\"384\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">specify:<\/span>\n<ul data-start=\"213\" data-end=\"384\">\n<li data-section-id=\"i4wan6\" data-start=\"213\" data-end=\"242\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"215\" data-end=\"223\">Node<\/strong>: the required node<\/span><\/li>\n<li data-section-id=\"jlw9l6\" data-start=\"245\" data-end=\"271\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"247\" data-end=\"258\">Storage<\/strong>: pbs-local<\/span><\/li>\n<li data-section-id=\"k8xe5w\" data-start=\"274\" data-end=\"319\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"276\" data-end=\"294\">Selection mode<\/strong>: choose the required VMs<\/span><\/li>\n<li data-section-id=\"r33xi5\" data-start=\"322\" data-end=\"344\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"324\" data-end=\"332\">Mode<\/strong>: Snapshot<\/span><\/li>\n<li data-section-id=\"5jmtdv\" data-start=\"347\" data-end=\"384\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"349\" data-end=\"361\">Schedule<\/strong>: a convenient run time<\/span><\/li>\n<\/ul>\n<\/li>\n<li data-section-id=\"1qe3pgw\" data-start=\"385\" data-end=\"416\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">configure retention if needed<\/span><\/li>\n<li data-section-id=\"14huaif\" data-start=\"417\" data-end=\"431\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">save the job<\/span><\/li>\n<\/ul>\n<p data-start=\"433\" data-end=\"521\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">From this point on, virtual machine backups will first be stored in the local datastore.<\/span><\/p>\n<h2 data-section-id=\"yvg7t2\" data-start=\"523\" data-end=\"559\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Step 4. Add an S3 endpoint in PBS<\/span><\/h2>\n<p data-start=\"561\" data-end=\"651\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">After configuring local backups, you can prepare a second datastore for the external copy.<\/span><\/p>\n<p data-start=\"653\" data-end=\"709\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">To do this, you first need to add an S3 endpoint in PBS:<\/span><\/p>\n<ul data-start=\"711\" data-end=\"1041\">\n<li data-section-id=\"1d7tgj2\" data-start=\"711\" data-end=\"750\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">open <strong data-start=\"718\" data-end=\"750\">Configuration \u2192 S3 Endpoints<\/strong><\/span><\/li>\n<li data-section-id=\"165m32f\" data-start=\"751\" data-end=\"766\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">click <strong data-start=\"759\" data-end=\"766\">Add<\/strong><\/span><\/li>\n<li data-section-id=\"64mu68\" data-start=\"767\" data-end=\"853\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">specify:<\/span>\n<ul data-start=\"780\" data-end=\"853\">\n<li data-section-id=\"304eoc\" data-start=\"780\" data-end=\"795\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">endpoint name<\/span><\/li>\n<li data-section-id=\"nrn3sw\" data-start=\"798\" data-end=\"812\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">endpoint URL<\/span><\/li>\n<li data-section-id=\"45ca7v\" data-start=\"815\" data-end=\"827\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">access key<\/span><\/li>\n<li data-section-id=\"ceyzjd\" data-start=\"830\" data-end=\"842\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">secret key<\/span><\/li>\n<li data-section-id=\"1mlqoj4\" data-start=\"845\" data-end=\"853\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">region<\/span><\/li>\n<\/ul>\n<\/li>\n<li data-section-id=\"ktteso\" data-start=\"854\" data-end=\"1021\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">if the S3-compatible storage requires additional compatibility settings, enable the necessary options in advanced settings, for example <strong data-start=\"992\" data-end=\"1021\">Skip If-None-Match header<\/strong><\/span><\/li>\n<li data-section-id=\"1ald9ir\" data-start=\"1022\" data-end=\"1041\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">save the endpoint<\/span><\/li>\n<\/ul>\n<p data-start=\"1043\" data-end=\"1138\" data-is-last-node=\"\" data-is-only-node=\"\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">After that, PBS will be able to use the object storage as the backend for a separate datastore.<\/span><\/p>\n<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19892\" src=\"https:\/\/unihost.com\/help\/minio.php?2026\/04\/Screenshot-at-10-31-12.png\" alt=\"Configuring Two-Tier Backup in Proxmox Backup Server - Image 3\" width=\"933\" height=\"589\" \/ title=\"Configuring Two-Tier Backup in Proxmox Backup Server - Image 3\"><\/span><\/p>\n<h2><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Step 5. Create a second datastore with the S3 type<\/span><\/h2>\n<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">You can now create a second datastore that will use object storage.<\/span><\/p>\n<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">In PBS:<\/span><\/p>\n<ol>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">click <strong>Add Datastore<\/strong><\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">in the <strong>Name<\/strong> field, enter for example pbs-s3<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">in the <strong>Datastore Type<\/strong> field, select S3<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">in the <strong>Local Cache<\/strong> field, specify a separate local cache path<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">in the <strong>S3 Endpoint ID<\/strong> field, select the endpoint you created earlier<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">in the <strong>Bucket<\/strong> field, select or enter the bucket<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">save the datastore<\/span><\/li>\n<\/ol>\n<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">This datastore will use an S3 backend, but a local cache path is still required for it to function.<\/span><\/p>\n<h2><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Step 6. Configure a Sync Job from the local datastore to the external one<\/span><\/h2>\n<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">After creating pbs-s3, you need to configure synchronization from the local datastore.<\/span><\/p>\n<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">In PBS:<\/span><\/p>\n<ol>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">open the pbs-s3 datastore<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">go to the <strong>Sync Jobs<\/strong> tab<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">click <strong>Add<\/strong><\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">set the local datastore pbs-local as the source<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">configure the synchronization schedule<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">save the job<\/span><\/li>\n<\/ol>\n<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">This step is what creates the second backup copy in the external storage.<\/span><\/p>\n<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19893\" src=\"https:\/\/unihost.com\/help\/minio.php?2026\/04\/Screenshot-at-10-31-22.png\" alt=\"Configuring Two-Tier Backup in Proxmox Backup Server - Image 4\" width=\"904\" height=\"633\" \/ title=\"Configuring Two-Tier Backup in Proxmox Backup Server - Image 4\"><\/span><\/p>\n<h2 data-section-id=\"n54e3g\" data-start=\"0\" data-end=\"35\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Step 7. Configure the task order<\/span><\/h2>\n<p data-start=\"37\" data-end=\"126\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">For the setup to work correctly, it is important to arrange the tasks in the right order.<\/span><\/p>\n<p data-start=\"128\" data-end=\"156\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">The recommended sequence is:<\/span><\/p>\n<ol>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">backup from Proxmox VE to pbs-local<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"200\" data-end=\"209\">Prune<\/strong> for pbs-local<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"228\" data-end=\"250\">Garbage Collection<\/strong> for pbs-local<\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"269\" data-end=\"281\">Sync Job<\/strong> from pbs-local to pbs-s3<\/span><\/li>\n<\/ol>\n<p data-start=\"312\" data-end=\"337\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">This order allows you to:<\/span><\/p>\n<ul data-start=\"339\" data-end=\"496\" data-is-last-node=\"\" data-is-only-node=\"\">\n<li data-section-id=\"oh4lnl\" data-start=\"339\" data-end=\"372\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">complete the local backup first<\/span><\/li>\n<li data-section-id=\"4eyd6i\" data-start=\"373\" data-end=\"418\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">then clean up old backups and unused chunks<\/span><\/li>\n<li data-section-id=\"cyxud7\" data-start=\"419\" data-end=\"496\" data-is-last-node=\"\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">and only after that synchronize the updated state to the external datastore<\/span><\/li>\n<\/ul>\n<p><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19894\" src=\"https:\/\/unihost.com\/help\/minio.php?2026\/04\/Screenshot-at-10-31-34.png\" alt=\"Configuring Two-Tier Backup in Proxmox Backup Server - Image 5\" width=\"999\" height=\"357\" \/ title=\"Configuring Two-Tier Backup in Proxmox Backup Server - Image 5\"><\/span><\/p>\n<h2 data-section-id=\"1ulrwix\" data-start=\"0\" data-end=\"61\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Step 8. Verify that synchronization completed successfully<\/span><\/h2>\n<p data-start=\"63\" data-end=\"98\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">After the first Sync Job run, open:<\/span><\/p>\n<ul data-start=\"100\" data-end=\"173\">\n<li data-section-id=\"1iumyky\" data-start=\"100\" data-end=\"124\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">the pbs-s3 datastore<\/span><\/li>\n<li data-section-id=\"suxygl\" data-start=\"125\" data-end=\"148\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">the <strong data-start=\"131\" data-end=\"144\">Sync Jobs<\/strong> tab<\/span><\/li>\n<li data-section-id=\"1j5d3ii\" data-start=\"149\" data-end=\"173\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">the task execution log<\/span><\/li>\n<\/ul>\n<p data-start=\"175\" data-end=\"329\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">If everything is configured correctly, the job status should be successful, and backups of the virtual machines should appear in the contents of pbs-s3.<\/span><\/p>\n<p data-start=\"331\" data-end=\"596\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">You may also see the internal datastore structure in the external object storage, for example directories such as .chunks, .cnt, and other service data. This is normal: PBS does not store backups as separate vzdump archives, but in its own internal structure.<\/span><\/p>\n<h2 data-section-id=\"j29dm5\" data-start=\"598\" data-end=\"649\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Step 9. Add the external datastore to Proxmox VE<\/span><\/h2>\n<p data-start=\"651\" data-end=\"808\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">If you want to restore virtual machines directly from the external datastore through the Proxmox VE interface, you also need to add it as a separate storage.<\/span><\/p>\n<p data-start=\"810\" data-end=\"824\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">In Proxmox VE:<\/span><\/p>\n<ol>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">go to <strong data-start=\"834\" data-end=\"858\">Datacenter \u2192 Storage<\/strong><\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">click <strong data-start=\"867\" data-end=\"898\">Add \u2192 Proxmox Backup Server<\/strong><\/span><\/li>\n<li><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">specify:<\/span><\/li>\n<\/ol>\n<ul data-start=\"826\" data-end=\"1141\">\n<li style=\"list-style-type: none;\">\n<ul data-start=\"912\" data-end=\"1122\">\n<li data-section-id=\"71tv8g\" data-start=\"912\" data-end=\"942\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"914\" data-end=\"920\">ID<\/strong>: for example pbs-s3<\/span><\/li>\n<li data-section-id=\"znmz4\" data-start=\"945\" data-end=\"978\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"947\" data-end=\"957\">Server<\/strong>: the same PBS server<\/span><\/li>\n<li data-section-id=\"1h28099\" data-start=\"981\" data-end=\"1009\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"983\" data-end=\"995\">Username<\/strong>: the PBS user<\/span><\/li>\n<li data-section-id=\"1m7w3l7\" data-start=\"1012\" data-end=\"1040\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"1014\" data-end=\"1026\">Password<\/strong>: the password<\/span><\/li>\n<li data-section-id=\"12peib5\" data-start=\"1043\" data-end=\"1068\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"1045\" data-end=\"1058\">Datastore<\/strong>: pbs-s3<\/span><\/li>\n<li data-section-id=\"phoi10\" data-start=\"1071\" data-end=\"1122\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\"><strong data-start=\"1073\" data-end=\"1088\">Fingerprint<\/strong>: the same certificate fingerprint<\/span><\/li>\n<\/ul>\n<\/li>\n<li data-section-id=\"1rov1nt\" data-start=\"1123\" data-end=\"1141\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">save the storage<\/span><\/li>\n<\/ul>\n<p data-start=\"1143\" data-end=\"1248\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">After that, you will be able to open pbs-s3 in Proxmox VE and view backups from the external datastore.<\/span><\/p>\n<h2 data-section-id=\"8dtpi\" data-start=\"1250\" data-end=\"1263\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">Conclusion<\/span><\/h2>\n<p data-start=\"1265\" data-end=\"1624\" data-is-last-node=\"\" data-is-only-node=\"\"><span style=\"font-family: Ubuntu, sans-serif; font-size: 12pt;\">This setup makes it possible to separate fast local backup storage from the external copy. The main backups are first saved to a local datastore, and then synchronized to a second datastore based on S3-compatible object storage. This is a convenient option when you want to keep local backup performance high while also maintaining an additional offsite copy.<\/span><\/p>\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the previous articles, we covered the basic virtual infrastructure layout and the setup of an environment for remote work. Now we move on to the final stage \u2014 organizing backup for virtual machines. This is necessary to protect production systems from unexpected failures, configuration mistakes, unsuccessful updates, and other situations that can lead to [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[158],"tags":[1082,1081],"class_list":["post-19896","post","type-post","status-publish","format-standard","hentry","category-dedicated-servers","tag-pbs","tag-proxmox"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Configuring Two-Tier Backup in Proxmox Backup Server - Unihost.FAQ<\/title>\n<meta name=\"description\" content=\"Proxmox VE: configuring virtual machine backups via Proxmox Backup Server with subsequent synchronization to S3 storage.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/unihost.com\/help\/configuring-two-tier-backup-in-proxmox-backup-server\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Configuring Two-Tier Backup in Proxmox Backup Server - Unihost.FAQ\" \/>\n<meta property=\"og:description\" content=\"Proxmox VE: configuring virtual machine backups via Proxmox Backup Server with subsequent synchronization to S3 storage.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/unihost.com\/help\/configuring-two-tier-backup-in-proxmox-backup-server\/\" \/>\n<meta property=\"og:site_name\" content=\"Unihost.FAQ\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/unihost\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-22T13:36:56+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/unihost.com\/help\/minio.php?2026\/04\/Screenshot-at-10-30-16.png\" \/>\n\t<meta property=\"og:image:width\" content=\"267\" \/>\n\t<meta property=\"og:image:height\" content=\"234\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Unihost Support\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@unihost\" \/>\n<meta name=\"twitter:site\" content=\"@unihost\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Unihost Support\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/unihost.com\/help\/configuring-two-tier-backup-in-proxmox-backup-server\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/unihost.com\/help\/configuring-two-tier-backup-in-proxmox-backup-server\/\"},\"author\":{\"name\":\"Unihost Support\",\"@id\":\"https:\/\/unihost.com\/help\/#\/schema\/person\/bb5ae95f38577c920e6a7507888b715a\"},\"headline\":\"Configuring Two-Tier Backup in Proxmox Backup Server\",\"datePublished\":\"2026-04-22T13:36:56+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/unihost.com\/help\/configuring-two-tier-backup-in-proxmox-backup-server\/\"},\"wordCount\":1094,\"publisher\":{\"@id\":\"https:\/\/unihost.com\/help\/#organization\"},\"image\":{\"@id\":\"https:\/\/unihost.com\/help\/configuring-two-tier-backup-in-proxmox-backup-server\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/unihost.com\/help\/minio.php?2026\/04\/Screenshot-at-10-30-16.png\",\"keywords\":[\"PBS\",\"Proxmox\"],\"articleSection\":[\"02. 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