Veeam nbd vs hot add This takes the hot-add proxies out of the equation. This mode can typically be used from a physical host, which does not have access to the underlying storage, or is used from a virtual appliance. As a result, data is retrieved directly from storage via ESX(i) storage stack (bypassing network stack), which allows for significantly better performance. How can I read the first secor of the disk using nbd transport, then read the remaining sectors using hotadd transport? Is this Veeam software related, or my infrastructure related, or client related. Not a before writing to Veeam Support I looked inside log files for errors and discovered access permission errors for The writing speed has really increased rapidly, but it is a temporary solution for us, because we strongly prefer NBD transport instead of hot-add. Finally, NBD mode puts the highest load on the hypervisor, but can be a good design, or sometimes even the only The problem was already there (3 times in a month only), so it has nothing to do specifically with Veeam 11a. I am receiving "vmdk has been skipped due to an unsupported type The note above was about NBD failing, What’s the transport mode (shown next to disks in the backup job status - look for NBD or hot add). This approach is a way faster method compared to VM restores Re-configure the target proxy to use Network (NBD) transport mode. This will force Veeam to build a new VMware topology in it´s cache. Greets halllowien. x-5. The notification can be one of the following: Your PC needs to be restarted to finish setting up this device: LSI Adapter If the proxy is physical - then it's inherently only able to do SAN or NBD. Veeam Community discussions and solutions for: Unreliable Hotadd with vSphere 6. When i am right, i just need to add the registry dword key VMwareNBDConnectionsPerDisk under HKEY_LOCAL_MACHINE\SOFTWARE\Veeam\Veeam Backup and Replication and 1, 2, 3 But if you only use Veeam, you should be safe to enable NBD multi-threading enabled. The bad news: none of the vms work with hot add. HotAdded disks should be released with VixDiskLib_Cleanup() before snapshot delete. Hot add processing mode requires that all proxy VM disks are located on the same virtual volume with the processed VM. . I did do a restore with hot add mode and got 195 MB/s which is triple the nbd mode. Notice that both vms reside on the same lun. Right now that veeam is runnning a full backup and the first 3 disks are backuped, and 2 disk are still being backuped. we did some tests with NFS that has native Snapshots enabled and the limitations still apply. VMs residing on virtual volumes can be processed in Virtual Appliance (Hot Add) and Network (NBD) processing modes. quick test on a lighter VM of mine, as this is a common question, which route to go on the proxy side - hot add/nbd. Veeam ‘standard’ performance with CBT, hot add backup and Bitlooker; In part 1 of this blog series I want to give a quick overview of the architecture of Veeam Backup for Proxmox and it’s initial setup. svenh Enthusiast Posts: 30 Liked: 5 times Joined: Thu Jan 21, 2016 12:56 pm Full Name: Sven Hartge Location: Germany. x. If you are using virtual proxy, HotAdd works great, but you need to have a proxy on every host in the cluster for that. Hot add and local proxies were used as expected. The reason for that is the incorrect UUID reference for the Veeam aevans@ricoh. foggy Veeam Software Posts: 21140 Liked: 2141 times Joined: Mon Jul 11 I did not know it already that this is possible in vSphere right now. As I understand, as Veeam server is a VM on host2, it will be able to backup host2 VMs using hot add mode. This way the hot-add method can be used for restoring NBD multi-threading — The backup engine is now capable of establishing multiple NBD connections per VMDK for better performance of network transport mode. 172 of Veeam Backup & Replication. Sometimes you'll want a Physical one (Doing SAN Transport backup for larger throughput) sometimes you'll want one doing NBD (lots of small VMs with low change where hot add API overhead adds up) sometimes you'll want a TON of hot add. Our bottleneck is always source (not proxy, network or target). Would there be a significant speed advantage to configure the DR hosts to see the production datastores so the proxy would use HotAdd? One of the first questions to ask is: “How many proxies should be in use?” The prevailing logic is to that the more proxies that are in place the better the performance and distribution. After analyzing the logs and isolating the issue to a single proxy (Forcing the proxy to use only Hot-Add + creating a test backup job with only this proxy), I was able to obtain a more informative message. VMware vSphere. Other backup proxies were working normally. This also applie That is how the Hot-add method works 🙂 VMware creates a snapshot on the original VM and then the snapshotted disk is mounted in read only mode by the virtual Veeam Server (or dedicated proxy server if you have one). Thank you for your assistance Kind Regards, Lubos It looks like the issue is caused by hot add process taking too long (20-30 min), and it appears to be caused by some change around the latest VDDK update that Update 3a uses. direct SAN. Hi All, it’s my first post here. Backup gets data through the management uplink of the host. com. Your direct line to Veeam R&D Just making sure that we are staying along the same line, you do understand that hot-add is only used for full VM or VMDK level restore, don’t you? Thanks. If a Direct NFS proxy exists on same host, Veeam waits for a free task slot there. I decided to try hotadd, since I have a new windows server 2008 r2 VM to use as the backup proxy. In the past we've always used HotAdd as I thought this gave us best performance but I just read that Veeam Community discussions and solutions for: DirectNFS, NBD/Hotadd and Windows of VMware vSphere R&D Forums. For the veeam backup proxy vm' does the SCSI adapter type need to match the vm's that I am backing up. Depending on your backup size per VM and the duration to copy that a Hot-Add Proxy with 8 cores (and 8 concurrent tasks) can easily saturate a 10G NIC. you can add it by backup proxies / add new vmware backup proxy / add new / windows server. The nodes that do have a Veeam proxy can hot add the disks. 1: Preferred Same Host. direct SAN of VMware vSphere R&D Forums. Veeam can only perform direct SAN restore with thick provisioned VMDKs. 1. Symptoms: During the initiation of the replication job, about half the time, the proxy used for the destination portion of the I assume the reason why you had these warning messages is that your backup job mode failed over to network mode because Virtual Appliance (Hot Add) mode was available. 21 posts • Page 1 of 1. • Force data retrieval over Veeam “network mode” (NBD)—While a virtualized Veeam Server can use VMware Hot Add capability for retrieving virtual machine backup data, it is not recommended for HPE SimpliVity due to possible performance and reliability concerns. Due to this, Veeam network mode should be forced within Veeam backup proxies We set all this up and tested this functionality out on both our Pure Storage array and the Nimble HF-60 hybrid array. NBD) and see if Check the logs here to see what is being reported as well to help narrow down the issue - C:\ProgramData\Veeam\Backup. Your direct line to I just wanted to understand if there was any fundamental difference in data transfer for Hot add vs NBD? Currently, we are facing an issue that all of our jobs that use NBD are failing Problem. have an esx cluster with a vm which acts as proxy vm (server 2012 R2). vTPM NBD vs. I was hoping restores used SAN mode which is used for backups That said, there is a place for Virtual Appliances and Hot Add, specifically if you don't want to spend the money on a 'dedicated' piece of hardware for backups (however, you're probably and hopefully backing up to different storage anyway). netwichi Influencer Posts: 10 Backup from NFS datastores involves some additional consideration, when the virtual appliance (hot-add) After increasing the NFC buffer setting, you can increase the following Veeam Registry setting to add addition Veeam NBD connections: Path: HKLM\SOFTWARE\VeeaM\Veeam Backup and Replication; Key: you haven't install full veeam on this server. Other enhancements include: a proprietary NFS client for backing up VMs from NFS datastores Veeam Community discussions and solutions for: possible resolution (one of) for "Unable to hot add source disk, failing over to network mode' of VMware vSphere R&D Forums. Incorrect VMDK type. For SAN mode - Which network? 4. Our backup will be on a dell hardware server with local storage (veeam install and large raid), no other device. Here is a rundown of five common terms in the product: Veeam Community discussions and solutions for: vTPM NBD vs. both jobs do failover to nbd (for all disks, system and data) with the message: This post is about 3 reasons why direct SAN restore failover to NBD. Anyway, each cluster backup was taking 8-10 hours. If it's a virtual proxy it can determine such - so maybe explicitly configure that proxy to go NBD. So far, so good -- however, I have noticed (using virtual appliance mode) that the Windows VM ( 2003 R2, 32-bit, 2GB RAM, local SQLExpress, Veeam 4. Use Network (NBD) mode setting on Source Backup Proxy as opposed to Appliance (hotadd) mode for your backup and/or replication jobs in Veeam. Regarding the quoted statement, it seems strange in many ways:- NBD session limit is for ESXi, not vCenter. Mentioning again that i talk about storage integrations and DirectNFS, not about VADP (NBD, Hot-add). To submit feedback regarding this article, please click this link: Send Article Feedback To report a typo on this page, highlight the typo with your mouse and press CTRL + Enter. I've tried with patch 4 Prior to v9, Veeam could only do HotAdd or NBD if your datastores were on NFSv3. If you’re using nbd], that is Network Mode and the least performant of the 3. Veeam NBD mode . What we experience now was also happening with v. also, the consolidation issues have been non existent while on NBD - which is Veeam Community discussions and solutions for: VM backups failing when using NBD vs Hotadd of VMware vSphere R&D Forums. NBD over 10GbE VMKernel interfaces link will provide a very stable and good performing solution without any special configuration needed. Storage is VMware vsan. We would expect HotAdd on the TargetSide too, but when When you choose the network mode, you entirely avoid dealing with hot-add vCenter and ESXi overhead or physical SAN configuration. ADF is supported for Backup from Storage Snapshots, Direct NFS and virtual appliance (hot-add) mode. Best regards, Hannes. 2. If the transport mode is nbd - Which VLAN will the traffic go over? 3. When I dug deeper, I saw: 5/22/2015 3:01:18 PM :: Unable to leverage hot add processing mode: All suitable backup proxy VMs have non-unique BIOS UUID Right now we use traditional architecture, servers connected to SAN over Fiber Channel. 5 U3a (Plus Hotfix) where the same Replica job one night will use HotADD and the next night tries to use HotADD but eventually fails to NBD. Andreas Neufert VP, Product Management Posts: 7098 Liked: 1517 times Joined: Wed May 04, 2011 8:36 am Full Name: Andreas No matter what segment of technology we are talking about, unique terms and a never-ending acronym soup seems to follow us. Our issue is this - our backup server is on a non-clustered host, backing up clustered and non clustered resources. foggy Veeam When you log in to the Veeam backup proxy server interactively following the execution of a job using the hot add transport mode, you may get a notification from the OS prompting to restart the server. Virtual Appliance (Hot-Add) mode is the recommended option, as it gives you the best performance. Your direct line to Veeam R&D. I work with some customers that use 4 or 8 vCPU hot add proxies to backup >10,000 VMs (the largest are in the 20,000 VM ballpark) with no issues overall. Contact When this occurs, the ESXi host Veeam is trying to do hot-add/virtual appliance mode with cannot find the VM by the UUID provided, as it has changed and is no longer valid. It’s working stable and faster than NBD, because of the limitation in vSphere. The main consideration of using NBD is network capacity (10Gb of faster ). 0 U2 Support of VMware vSphere after upgrading vCenter to 7. so we backup and replicate these VMs and with NBD it makes that much easier. The data store with the Veeam VM is only a 200GB data store, so I never considered a larger block size for it. So if you can help out with some deployment questions for hot-add, that would be great. This is a topic with a lot of facets still not widely known. Virtual proxy: The Virtual Appliance (hot-add) mode is a good an fast backup mode. Click [ Add New Device ] Chose “Existing Hard Disk” Navigate to the location of the base disk from the VM in step 1. we use production VMs as proxies, to save on cost, and this has proven to work well for us. Since going to Network for transport (a few days ago), we have cut each job time to under 2 hours and the backup speeds are higher and more consistent vs hot add that look like a sine wave. VM change-rate awareness. Veeam is all virtual, hot add VIA appliance mode. I recently installed a VM as VeeAm proxy because network mode failed and it solved by issue by running hotadd/hot backup for that VM. Remyc Lurker Posts: 2 Liked: never Joined: Fri May 05, 2023 8:00 am Veeam Community discussions and solutions for: Comparison with Hycu of Veeam Backup & Replication. Veeam support provided some interesting optimizing ideas to try to debug the hot-add problem, but we have moved to direct SAN. Not a support if there are other proxies configured then it might be so that the Hot-Add proxy runs out of slots and the other proxy is used for that VM instead All ESXi hosts have access to all Datastores and all Veeam Proxies have access to all Hosts & Datastores. Virtual Appliance Mode. More details are highlighted in the user guide. I have compared and contrasted these two technologies in this post. Hello, I saw this on Veeams website: Typically, Network mode uses only 40% of the physical available bandwidth of the external VMKernel Interface connection due to throttling mechanisms implemented on the management interfaces of VMware vSphere 4. If the transport mode is Hot Add then will the traffic ride over the iSCSI network / Mgmnt network/ VM Network - This is not very clear while viewing the vSphere performance charts. Backup performance is fine. If we restore to a We can see that on the source side VEEAM uses HotAdd, but on the target side it is only NBD, which means network mode. Because for the original case, the workaround was to replace VDDK libraries with ones used in Update 3, which took hot add times down to normal (1-2 min). If a proxy on same host does not exist, Veeam uses another Direct NFS proxy (on another host or physical server) or falls back to virtual appliance (hot-add) and finally to network (NBD) mode. So this mode could be faster in terms of needed During a recent convergence of Veeam technical staff members, three situations were listed when Network Mode may be the best choice for a proxy and its associated job(s), including: 1. NBD (network mode) This mode doesn’t have any special setup requirements. But, be very careful to ensure that Backup I/O Controlis in use. #1 Global Leader in Data Resilience . All in all it really depends on your budget and where you want to go with it. Simplivity is a whole new animal to us being NFS only. When you choose the network mode, you entirely avoid dealing with hot-add vCenter and ESXi overhead or physical SAN configuration. Your direct line to Veeam R&D Transport mode (NBD or hot add) is what affects backup performance the most, and then primary/backup storage performance. The vm's are a mix and match of LSI and Paravirtual. To take the load off the LAN, Veeam Backup & Replication instructs VMware vSphere to create a VMware vSphere Tl;DR: Quick migration from one storage system to another using in SAN/HotAdd in any combinations of source/destiantion reaches only 90MB/s vs vMotion which reaches 250MB/s (so do the backups). Veeam Community discussions and solutions for: All VM`s in cluster are using HotAdd only one is using NBD of VMware vSphere R&D Forums. any idea what to check? thanks. Thanks. I was really confused when restoring a VM and Veeam suddenly picked NBD mode for the restore operation. NBD not as fast as Hot add so guess that's out of the I will have a check when it comes to network vs hot add Top. All of them result in log messages in B&R about 'hot add not supported for this disk'. If NBD, then that’s network mode - data moving over the mgmt network - we don’t want that on 1gb. exe, they use the older versions. When using NBD for backup, please consider the following: As there is no overhead (like SCSI hot-add, or search for the right volumes in Direct Storage Access) on backup proxies, network mode can be recommended for scenarios with high-frequency backups or replication jobs, as well as for environments with very low overall data and change rate With NBD, I only see an average of about 25MB/sec read times on the VMDKs. Veeam is currently addressing this problem with VMWare. I’m evaluating Veeam in my lab. NBD is the slowest of all transport modes. Highs of 40MB/sec and lows of 10MB/sec. of VMware vSphere. I just want to make sure the requirements are satisfied. Use Direct Storage Access or NBD backup modes instead. To protect VMware, Veeam reduces the number of permitted NBD connections to 7. proxy vm is configured to use hot add mode (failback to nbd if hot add is not possible). Thanks! As other have and will mention, with Veeam, if backups from Storage Snapshots or Direct SAN Access is not an option, Hot-Add is the next best thing. This is not reported anywhere, though. Veeam Community discussions and solutions for: Hardened repository performance troubleshooting of Veeam Backup & Replication - NIC speed of the proxy server, are you using the same VM in NBD and Hot-Add/Virtual Appliance Mode when you’re seeing the 25% performance difference? NBD is only good when you don't care about performance. in our environment the kb2711 was the solution. I canceled the restore as it was really really slow due to the remote proxy, then moved the veeam server and proxies back to the original vmware cluster and it seemed to work as expected. 10. Your direct line to Veeam R&D (Debian 10) was always switching to NBD mode and forcing the traffic through the router to get to the ESXi management interfaces instead of using the dedicated backup With your current configuration Network Mode is utilized, you can check it if you view session logs (see those "[nbd]" letters?) which causes data to flow through 1Gb mgmt interfaces and that can be very slow. Downloads Contact us Close. Storage is a HPE Nimble attached to the ESXi Hosts via FC. NBD over 1GbE VMKernel interfaces can be used for failover. Hot add is preferred. KB2989 might also be assuming the PVSCSI is controller 1 so the instructions that say "Add an LSI Logic SAS adapter" assumes it will be added as SCSI 0. It's only a few minutes set this up. - Veeam Cloud Connect does allow service providers limiting tasks per tenant, this is its core functionality. 3 posts • Page 1 of 1. Find what Proxy the Job (Veeam) decided to use and see what is shown in brackets. You might want to include some checks in your code to detect this in your HotAdd appliance, and reconfigure to add controllers back in. Veeam Community discussions and solutions for: Problem with hotadd in appliance mode of Veeam Backup & Replication Problem with hotadd in appliance mode - R&D Forums R&D Forums Veeam Community discussions and solutions for: [Fix/Workaround Needed] Hot-add proxy processes VMs on NFSv3 datastores on different hosts even with KB1681 applied of VMware vSphere (or NBD backups). Our hot add backups also seeam to be a bit faster now, i Check if you can PING this FQDN from Veeam Backup server and from the Veeam Proxy. But another aspect is the time it takes a backup job transfers data to the repository. With the backup server inside a VM try to make it a hot-add proxy (=virtual appliance mode). *It can be noticed by looking at the last screenshot - source proxy [nbd]. Use Direct Storage Access or NBD backup Hot-Add In this mode, VM disks are attached (hot-added) to the backup proxy and data is transported to the target location. The Network mode has low data transfer speed over LAN. In all tests the NBD mode destroyed the SAN transport mode in performance. In testing I noticed that the Simplivity nodes that do not have a Veeam proxy process the VM's in NBD mode. We can either use hot add mode for restores or look into getting our ESXi management interfaces up to 10 gig. You can just try and run a backup job using that proxy and see whether it uses hotadd to backup the second VM (the corresponding [hotadd] tag will be displayed right after the proxy VM name in the job statistics window, after selecting the VM being backed up in the left pane). Ok - I think you may close the issue ticket - I am going to reconfigure our Veeam B&R to hot-add and we will wait to hotfix from VMware or Veeam. I am using hot add mode. the Veeam server pulling the VM off the SAN and (I guess?) sending it over NBD to the ESXi host's local storage? If this is the case, to determine what’s used, go into a Backup Job (double-click it) and look at the Job History Task list on the right. I opened two support cases with VEEAM (#05880708 and #05894905). If both VMs reside on the same host, no additional configuration is required. For requirements and limitations that backup proxies have, see Requirements and Limitations for VMware Backup Proxies . As soon as there is an existing VM Snapshot, storage integrations won't work. High speed hot-add restores. Because of a locking problem with NFSv3, (Hot-Add with proxy on another host and DirectNFS with proxy on another machine) your VM disks are mounted to some other machine the locking issue persists for NFS v3. Recently I ran into this problem where my Veeam v6 VM backup proxy (the default out-of-the-box backup proxy) could not hot add any of the disks in backup jobs. Re After installing Veeam Backup & Replication 9. We are tried to backup some VM vrom Vcenter but Veeam always says after backup an error: “hot add is not supported for this disk failing over to network mode” Our datasource is an HP SAN over Fibre, and target is an simple Western Digital NAS. Host-based backup of VMware vSphere VMs. Hot-Add fix for when all jobs fail for hot-add mode. VMs residing on VSAN can be backed up in Virtual Appliance (Hot Add) and Veeam Community discussions and solutions for: HotAdd VDDK performance of VMware vSphere 1. At the moment all seems to be working very fine: i've tried to launch backups on VMs running in production hours without recieving calls from angry people. I guess I can open a case with VMWARE to see if they have any recommendation. Veeam version is 7. We use HotAdd Proxy mode exclusively, the main backup repository is StoreOnce Catalyst, and the storage array is Dell SC9000. If vCenter knows the host by the management interface then that is the interface the proxy will attempt to connect to. I am running Veeam as a VM with proxies. How to have a warning in that case? Top. The overhead for vSphere is minimal before starting the backup stream. Right now, the hosts at the DR site do not see the production datastores, so VEEAM uses NBD to backup. In addition, be aware also that before using Virtual Appliance you have to install VMWare Tools on the VM you’re going to use as proxy, working in such method; otherwise, it will not work. Next optimization step would be the type of proxy used. As every newbie does, i've started with the "all default" options, and i see "hot add" is being used (guess so because the VM where Veeam is running has disks attached when performing backups). Your direct line Quick links. can be slow in large clusters due to necessary configuration changes in the virtual machine (consider required time for hot-add operations) if VMs reside on local datastores you need one proxy per ESXi host -> otherwise NBD. Because for the latter two there is a lot of VMDK/LUN mapping to do. If the backup proxy can access datastores you're restoring VMs to, it will automatically attempt to restore selected VMs via ESXi I/O stack directly (Hot Add mode). It can perform reasonable on 10Gbit links with parallel running jobs. Not Source is hot add, destination is NBD with physical Servers as Proxys. 1 - Veeam is using NBD. It is also often used, when Veeam is deployed in branch office configurations (ROBO). FAQ; Main. Veeam KB1681: VM Loses Connection During Snapshot Removal; Virtual Appliance backup job fails after you’ve cloned or restored your VBR server. 1 ) throws errors in the eventlog when attaching the hot-add scsi disks of the VM being backed up. These can be shown in the product itself, discussed in the forums or even in these very blogs. Cause This is a known issue affecting VMware VDDK (Virtual Disk Development Kit I flipped it around, so SCSI 0 was LSI and SCSI 1 was PVSCSI (with the O/S disk) and after editing the proxies in Veeam (right-click, edit, finish) my test job is now using hot add. We currently have 3 ESXi hosts (HPE Synergy) which are managed with one Vcenter Server. Something about the hot add of VMDK and removing taking a longer time than the actual backups. While analyzing the logs of a backup job, the proxies switched from Hot-Add to NBD mode. Removing all disks on a controller with the vSphere Client also removes the controller. As this is a small environment, I plan on using the Veeam server as the default backup proxy. Restart the Veeam Service and the Veeam vcenter Cache Service (don´t know the exact name for now, but if in doubt reboot all Veeam* Services on the Backup server). Products. Other transport modes (NBD/NBDSSL, Direct SAN, Direct NFS) are not affected. Continue to use hot-add mode but with a appliance on every singe host! See KB article 2010953. Edit the Veeam Proxy that will be processing the VM from Step 1. Veeam Community discussions and solutions for: Veeam Backup Proxy the customer will not mix that, and also our proxy vms are not in the domain because of security issues. Your direct line to NBD, hot-add and direct from storage array Are there any obvious pros for Veeam that I'm Veeam Community discussions and solutions for: vSphere 7. So all I need to do to make a proxy for hot-add mode is to install a simple Windows VM and then use the VBR console to push the Proxy role to it? (And maybe add an additional virtual SCSI controller to it if the FAQ is still current) 2. Veeam Community discussions and solutions for: Slow NBD Backup over 10Gbit Network of VMware vSphere R&D Forums. We don't recommend this mode for Nutanix. Then you can see whether your problem is related to the vmkernel limits/NBD or not. -ESXi 7. I was wondering why Veeam is not using FC to restore directly to SAN. Once backup or restore is finished, VM disks are detached In terms of bandwidth, NBD is the slowest mode. This will also speed up the process as you won’t suffer from the ~40% To use network mode, the only way is to install another Veeam proxy server and force this proxy to act as end point for sending data to your vCenter, not a really “sexy” solution - Initialize each disk/datastore from the Veeam Server point of view (Right-Click -> Initialize, from your Veeam server Disk Management Console). If you want the Veeam traffic to use a specific network then you'll need to get the proxy to use that specific Host 2 will be running 4 VMs including the VM running Veeam Server. Is this because the hotadd to the proxy VM is more efficient vs. The solution offered is to use NBD transport mode. Network Block Device (NBD): As the name implies, NBD will copy blocks of data over the network with vSphere’s Network File Copy (NFC) protocol. 5 Update 3a, the backup duration may be significantly increased for jobs using the (HodAdd) transport mode. 7 and 9. The network mode (NBD) is a very fast and reliable way to perform backups. 1. andreas2012 Veeam ProPartner Posts: 114 Veeam Community discussions and solutions for: Restore always uses nbd (I had hotadd before) of VMware vSphere R&D Forums. Add Archive Tier; Step 7. VMware Virtual SAN (VSAN) 2. Look up the job log to see what transport mode the target proxy is using, try switching it to a different mode (hot add vs. If a Direct NFS proxy exists on the same host, Veeam waits for a free task slot. 0. au wrote:We have a ring network between Production and DR sites that is 20gb dark fibre, basically it will never ever be the bottleneck and it couldn't be more stable as if we lose one network link failover to second link is instant and non-disruptive. It looks like I'll want to setup my Simplivity nodes management network on the 10GB NIC's and use NBD mode in Veeam to backup the VM's on NFS. Create a snapshot on the VM to be processed by Veeam Backup & Replication. We have an issue with Veeam server/proxies failing to use Hot-Add mode and resorting to Network mode. Anyway, you should have your backups in place, so there is nothing to worry about. Your direct line to Veeam R the system falls back to Hotadd/NBD and I want to know why. There is a throughput limit within ESXi host. -20 VMs spread across the 4 hosts -Automatic Transport selection on repo- Hotadd/CBT is working just fine. 0 Update 3 host running on a i7 system with 64GB, SSD and HD storage and a 1G NIC-VBR 12. I noticed that when restoring a VM with Veeam - we're using Veeam Backup & Replication 6. Veeam Community discussions and solutions for: Extremely slow backup. Because these are very large, we would like to have them use the “hotadd” transport mode. Avoid to backing up VMs on NFS datastores using hot-add. Veeam gives you lost of options and the environment and requirements will deliver that. with 'Unable to hot add target disk, failing over to network mode' There is no consistency in it. How come? Latest 11a patch here. Ended up using another backup Since VMWare still has speed issues with NBD Mode in vSphere 7 we are thinking about changing over to hot-add mode, but I am unsure about the number of necessary backup proxies for this. Return to “Veeam Backup & Replication Veeam Community discussions and solutions for: Slow replication with 12. I find backups are at a fast 93MB/s, but restores are slow at 3MB/s. Your direct line to Veeam R&D I would expect at least the same speed results in nbd mode as with hot add mode. In the field we've generally found that 8 vCPU hotadd are a really good balance of performance and manageability for larger scale environments that wish to use hotadd. Within a vSphere client, attach the base disk from the VM in Step 1 to the Veeam Proxy. BTW, we use NBD on all our proxy servers normally. At the same time, due to the low limit of max NBD connections per ESXi host, there are reliability concerns associated with increasing the number of such connections. It should be hot add if your backup server is a vm on the same hosts. I've been using NBD mode with no issues at all. VM with no existing snapshot BfSS - OK DirectNFS - OK Hot Add mode, also offers high throughput, but puts a small load on the ESXi host the virtual proxy resides on. Hi Stano, Can I ask, did you set the proxies explicitly on this step of the Failback wizard by clicking the "Pick backup proxies for data transfer" option? (Step 2) From your post, looks like the Production side proxy was picked by automatic selection, so please use that option and set the DR proxy as the source for the Failback, it should use Hotadd as expected. but NBD mode for the destination. In conclusion - Hey there, I'm in the middle of our first DR test after migration jobs away from NBD to Hot-add, and now I've got a huge number of vms who won't recover due to disk issues! I haven't found a huge amount of info, due to the whole "being in the middle of a DR test right now" thing, but I figured I'd take a second just to ask: Veeam BR server- 4 cores, 24 GB ram- 2 concurrent tasks but just changed this to 4 Veeam Proxy server- 8 cores, 32-40GB ram- lives on one of the hosts- 2 concurrent but now 4 Backup job- this is just one of them. Hot-Add In this mode, VM disks are attached (hot-added) to the backup proxy and data is transported to the target location. Each time I talk to customers at installation dates or health-checks, I spend some time talking about vSphere transport modes. we use the newest veeam backup and replication v6. Add Capacity Tier; Step 6. My backup repository will be on a local NAS device. 0 U2 I am having problems with linux hot add proxies. set up two separate jobs for each of our 2012 r2 fileserver. 1 - Preferred Same Host. With the exchange of the folders and the veeamagent. I was kind of hoping that if anybody else was using NBD had similar speeds or maybe had recommendations in Veeam or VMWARE that I But another aspect is the time it takes a backup job transfers data to the repository. Disclaimer: All But evidently something happens during hot add that makes the disk think it on the smaller data store (which actually doesn't have enough space to hold it, even if it had the right block size). 2. My guess is that fore whatever reason the HotAdd mode could not be used and the fallback to NBD happened. foggy Veeam Software Posts: 21140 Liked: 2141 times Joined: Mon Jul 11, 2011 10:22 am (something like "Unable to hot add source disk, failing over to network mode When you choose the network mode, you entirely avoid dealing with hot-add vCenter and ESXi overhead or physical SAN configuration. Hey Markus. Top. In HotAdd transport, virtual disks on backed-up VMs are HotAdded to the backup proxy so they can be easily saved to backup media. Max_IT Lurker Posts: 1 Liked: never Joined To deploy a proxy, you need to add a Windows-based or Linux-based server to Veeam Backup & Replication and assign the role of the VMware backup proxy to the added server. Veeam Software Posts: 688 Liked: 151 times Joined: Thu Jan 22, 2015 2:39 pm Full Name: Stefan Renner Location: Germany. It will either say esan], ]hotadd], or cnbd]. Works great. I try to attach two pictures. This takes time. If a single server Im not sure the logic veeam used to select this proxy over the other 3 local ones. Could you service provider be oversubscribing their infrastructure?- Veeam does support hot add transport for replication I spent most of the weekend tweaking our new v6 installation and have it working great - my backup window has been cut more than in half , but there was an issue I ran into (and worked around) with hotadd for writes on the new replication jobs. After some testing, the official answer is that V12 do not support Virtual Appliance transport mode (HotAdd) with VMware Tools Quiescence on vVOL's "by design". In some cases, depending on infrastructure setup and iSCSI storage, you can experience an issue when HOTADD mode performs slower than NBD(network) mode. I did open a suppose case with Veeam but was told that because we are using NBD and the bottleneck is at Source, they cannot help us. Veeam Backup & Replication. About our config, Veeam VBR Server, Proxy and Filestore are in same vlan. Due to the „historical growth“ of environments, including Veeam environments, many customers primarily utilize NBD, thereby sending backup data over the network. This is true for both the However, when the job runs it always picks a *VM* proxy (which is running on the same host that has the local storage) instead of the Veeam server itself. During Veeam restores though, this 1 gig interface is the pinch point. So when you backup a lot of small VMs, NBD could be faster (from execution time perspective) than SAN/Hot-Add. anyone have the same problem? thanks Rene Hello everyone,I would like to draw your attention to an issue detected following the Veeam upgrade to version 12 at one of my clients. We found for backing up 100s of VMs, NBD is faster with those small incremental backups vs Virtual appliance. Deploy the proxy on VMFS-6 or VMFS-5 volumes, so that the proxy can back up very large virtual disks. The logs are in support 05251738, which is closed due to network issues on that particular server. As noted NBD mode is the primary method used if no other can be. I found the following post on this forum: Yes, via virtual disk hot add Veeam Community discussions and solutions for: Linux Proxy doesn't see vSAN datastore for hot add of VMware vSphere R&D Forums. I normally only use paravirtual but there are alot of legacy vm's still using LSI. I realize NBD is slower than hot add or direct storage access due to data traveling over vSphere management stack, but should I not be expecting faster speeds on a 10Gb network? Veeam Backup & Replication prevents the Windows OS from initializing the volume automatically by changing the SAN Policy to "Offline Shared" when a server is added as a VMware Backup Proxy. 0 support. I am unable to find a way to force the usage of a Proxy on a VM by VM basis and I suspect there is not such a means. These are: Direct Storage Access, Storage Integration (I take this as a separate mode), Virtual Appliance and Network mode. We're moving all of our workloads to Simplivity and also use Veeam as to not "put all our eggs in one basket" quite yet for backups. Contact us. These methods are referred to as VMware Transport modes. Prerequisites: Veeam always uses NBD at tsightler wrote: ↑ Fri Jul 03, 2015 9:05 pm With NBD mode the proxy connects to the host using the IP or DNS name has provided to it by vCenter. As the support explained to me, it is not really a problem of veeam componentens but of vmware componentens, as veeam uses the vmware dlls/exe for hot add. I then tried a few different stuff and figured out if I picked a specific Datastore under the Datastore Cluster then hot-add works every I've got a number of VMs, some windows, some linux, some freebsd. R&D Forums. In this mode, data is retrieved through the ESXi host over LAN using the Network Block Device protocol (NBD). I found that using Hot-Add requires a little more RAM/CPU on each proxy vs Direct SAN Access. Any So this tells me CBT does work fine and only return changed blocks, so perhaps the issue is the target datastore performance. tried changing SAN mode on diskpart on veeam backup server, but again it does the same thing. If virtual appliance had worked properly, you would have seen [hot-add]. Virtual proxy and HotAdd allow faster recovery, maybe, but if so, why does Veeam still continue to offer NBD feature ? Present me any sysadmin or customer to setup an infrastructure for 5MB/Sec backup recovery speed using 10Gb network infra ??? Hot Add transport mode, The Bad & Ugly :. Veeam Community discussions and solutions for: Proxy VM As the hot-add process takes some time, I have seen several situations where NBD was faster in the end. 690. If a proxy doesn't exist on the same host, Veeam uses another Direct NFS proxy on another host or physical server or falls back to the virtual appliance (hot-add) and network (NBD) mode. I always use and recommended my colleagues to use Hot-add method. This article talks about these transport modes, the best practices around them and troubleshooting tips for some commonly seen errors related to For example, currently Veeam is not happy with my multihomed proxies and is confusing a single managed server , identified by it's backup network IP with the DNS name of the same proxy (which is on my VM Production Network on a different subnet) and declaring a Bios UUID conflict and defaulting to NBD instead of Hot Add for that proxy server. For example, we see: We are running Veeam ver 10 in a vCenter 7 environment and have a couple of backup jobs for our file servers that are using the “nbd” transport mode. NBD over 10 GbE VMKernel Interfaces link will provide a very stable and good performing solution. A VMware Backup Host can access Virtual Machine data from datastores using four different methods – SAN, LAN(NBD), HotAdd, NBDSSL. I’m always using that if direct SAN is not possible or if VBR is virtualized with iSCSI repository. Otherwise, the proxies run the risk of taking too much cycles fro In addition to NBD, the HotAdd Proxy is a common alternative to enhance backup performance in VMware environments. So now we change (properties in the added proxy) the transport mode to virtual I do confirm that NBD restore performance issues I experienced comes with Windows proxies and NBD. I checked and re-checked the list of reasons why hot add might not be working but couldn't find any of those issues in my situation. Veeam Advanced Data Fetcher (ADF) Veeam Advanced Data Fetcher (ADF) adds increased queue depth for >2x read performance on enterprise storage arrays. If not it’ll most likely be using NBD. Re: How to change the transport mode ? Post by rennerstefan » Tue Feb 08, 2022 8:03 am 1 person likes Virtual Appliance Mode (Hot Add) Q: How does it work? A: Backup proxy server uses SCSI Hot Add capability of VMware to attach disks of backed up VM directly to itself, and thus get direct access to data stored inside. Here NBD is much quicker than SAN and Hot-Add mode. If you have a job with a single VM in it, and put the Veeam Proxy on the same host, it should use hot add, if the job contains a VM from a host that the proxy ISN”T on, it’ll use NBD. Bottleneck is always showing "source ~95%". Maybe a recommendation is to go NBD for now - and upon your next vSphere upgrade (or Veeam upgrade), re-introduce HotAdd to benefit from it's throughput capabilities. As the default setting, virtual appliance mode (hot-add) has become quite popular for all-in-one deployments of Veeam Backup & Replication within virtual machines (for details, see the Deployment Scenarios section of the User Guide). This results in the network stack in this environment being additionally burdened and sometimes fully utilized alongside the usual VM and management traffic (depending on the configuration), leading to bottlenecks. With Direct Storage mode we got between 250 and 450MB/s processing speed and with Automatic (NBD) mode we got between 1 and 2GB/s. Veeam Community discussions and solutions for: (direct san) for my proxy and it has to failover to NBD. 1420 running on an i5 system with 16GB, with two 1G NICs, NIC1 con Veeam Community discussions and solutions for: Problem with automatic Transport Mode selection (NBD fallback instead of HotAdd) of VMware vSphere (NBD fallback instead of HotAdd) Post by dbr » Thu Sep 09, 2021 7:33 am 1 person likes this post. Veeam Community discussions and solutions for: [Replication] switching from hotadd to nbd takes too I've discovered that the process hangs with the hotadd transport for the target disk and instead of switching to nbd trasnport, it waits and waits. Veeam Backup & Replication has a number of terms that may be used as well. So far so good. It’s fine on 10gb. higyv mth lggat mmobc fbyls khhuede beuzn nifsq iokxtl nmdmjy