We were planning to redirect the VM snapshots genereated in the backup process to a "snapshot-only" LUN to eliminate the risk of exhausting the free space on our funtioal LUNs during the backup process.
I found the VMware KB on how to do this we're running ESXi 5 , and found that making this change will also move the swap file to that location unless I specify otherwise. I was wondering how other people are handling this. Are you letting both the snapshots and the swap files go to the same LUN? Something else? Snapshots are not backups. Snapshots should only be used if you are needing a quick roll-back point when doing server maintenance like installing Windows Updates.
Other than that snapshots shouldn't be used as a backup replacement. Moving snapshots around like this sounds like a lot of unnecessary overhead.
The backup software makes a snapshot of the server then reads from that snapshot as it writes the backup to alternate media. Once the backup job is complete, the backup software deletes the snapshot. This way we get an exact point-in-time backup the preferred method for a backup of a virtual machine. When we originally setup our virtual environment, our vendor suggested we do this as he has seen instances where the backup software did not delete the snapshots when the backup was complete, thereby exhausting all free space on the LUN which then caused the virtual environment to crash.
We've had this happen once, but not due to snapshots; it wasn't a fun experience. It's probably the standard VM image-level backup solution, where a snapshot is taken, the original VMDKs are copied off while changes are written to the snapshot VMDKs , and the snapshot is then deleted. Snapshots alone are not backups, but they are often used in order to implement VM image-level backups. Most VM backup solutions do it this way.
Same LUN for both, but I've had the same happen to me with Veeam, every now and then it will not remove the snapshot it takes during the backup procedure. RTO is the duration of time and a service level within which a business process must be restored after a disaster or disruption in order to avoid unacceptable consequences associated with a break in business continuity. Virtual Machine to Protection Group Relation With ABR, for each protection group included in a recovery plan, Site Recovery Manager needs to communicate with the underlying storage to create snapshots of replicated LUNs or promote replicated LUNs in case of real recovery in that protection group and present them to recovery site hosts.
Key takeaway: Adding protection groups to a recovery plan does not increase the recovery time by a large factor. Key takeaway: It is a good practice to have fewer but larger NFS volumes so that the time taken to mount a large number of such volumes decreases during the recovery. Placeholder VM Placement When you create a protection group for a set of virtual machines on the protected site, SRM creates placeholder virtual machines at the recovery site for each protected virtual machine.
Here is some data which throws light on how much guest boot up latencies add up to the overall recovery time: As seen in Figure 7, Steps 4 and 8—both of which involve starting up the guest and waiting for VMware Tools—take up a considerable chunk of time from the overall recovery time. To configure parameters that will help control the boot storm effectively: Locate the SRM folder, and in it find the config folder.
You should now be able to find the vmware-dr. Use a text editor like Notepad to edit this file. The following steps describe one way to do this: Set these values to a specific number.
Run a test recovery. If you notice the following error messages: Error - Cannot complete customization, possibly due to a scripting runtime error or invalid script parameters. Then you can: Run Cleanup, decrease the config values, and go to Step 2. If you do not notice any errors and feel that your platform is under committed, then: Run Cleanup, increase the config values, and go to Step 2. Key takeaways: More hosts lead to more concurrency for recovering VMs and so results in shorter recovery time.
When protecting VMs creating protection groups ensure that the recovery site hosts mapped under the respective inventory are in a proper powered-on state; otherwise, SRM will not use those hosts to create placeholder VMs. SRM places DPM in a manual mode while VMs are being powered on during recovery in order to prevent hosts from being placed in a standby state.
It resets DPM to its original state after the recovery has successfully completed. High Priority and Suspending Virtual Machines In a recovery plan, the virtual machines being recovered can be assigned to five different priority groups. Key takeaways: It is important to chart out the dependencies and priorities between virtual machines to be recovered so that only a certain number of required virtual machines can be assigned individual dependencies. Such dependencies impact recovery time.
Configuring VM dependencies across priority groups instead of setting per VM dependencies is highly recommended because VMs within each priority group will be started in parallel.
Suspending virtual machines on the recovery site will also impact recovery time. Figure 9. If you are adding multiple VMs to the datacenter or changing any inventory in general, you can get SRM to wait before doing another computation by setting storage. For example, setting storage. This setting is intended to make LUN Group Computation tasks less frequent when there are a lot of inventory changes going on.
VMware strongly recommends that VMware Tools be installed in all protected virtual machines. Many SRM recovery operations depend on the proper installation of VMware Tools in the protected virtual machines to carry out the following tasks: Wait for the OS heartbeat while powering on the virtual machine and wait for a network change while reconfiguring the recovered virtual machine.
However, if you do not have VMware Tools installed on any of the protected virtual machines, you can choose to set the timeout values for recovery. Wait for virtual machines to shut down on the protected site. During a planned migration, Site Recovery Manager tries to gracefully shut down the virtual machines on the protected site. Statistic cookies help website owners to understand how visitors interact with websites by collecting and reporting information anonymously.
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DV - Google ad personalisation. These cookies use an unique identifier to verify if a visitor is human or a bot. Need help? Our experts have had an average response time of We will keep your servers stable, secure, and fast at all times for one fixed price. Vmware Error: Failed to initialize swap file — How to fix?
Note, this answer is debating between swap partition vs swap file. I thought the question was whether you needed swap at all. SvenW, Yes, but it's not a given that something like that is likely to happen. That's for the admin to decide. Show 3 more comments. It is about how VMware handles swap. Sign up or log in Sign up using Google.
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