@olivierlambert, yes, but the snapshot doesn't need to remain till the next job is running. This distinction significantly impacts space requirements. You don't back up all your VMs simultaneously.
Best posts made by rtjdamen
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RE: Why does the backup use snapshots and not CBT
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Advise on pool
Hi, we are currently in the process of migration to xcp-ng, In VMWare we have multiple hosts running with different age and specs. I prefer putting these hosts into 1 pool. Currently we use hosts with these types of cpu's
First of all would it be possible to run these in a combined pool? second question is how to proceed, can we just put them all toghether and will the master manage the cpu masking? or is there one specific host we need to start with? I am curious if there is a manual on this proces? It seems that this is missing in the documentation.
What are your thoughts on this?
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RE: Fetch VMS and there current hosts
@olivierlambert i will open a support ticket right away!
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RE: Issues with diskperformance of an migrated vm
@olivierlambert i have now migrated 3 windows vms and they all perform well and normal.
Latest posts made by rtjdamen
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RE: Why does the backup use snapshots and not CBT
I have my configuration for quadricsoftware up and running, so far so good, works as promised. i will let it run for a few weeks and let u know the results. the CBT is a real game changer so far!
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RE: Why does the backup use snapshots and not CBT
@olivierlambert ok i will share my experience as well.
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RE: Why does the backup use snapshots and not CBT
@olivierlambert yes, maybe the documentation on xcp website can be updated to list them as well.
What is your experience with these backup tools, do u know of companies using them?
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RE: Why does the backup use snapshots and not CBT
@olivierlambert i am currently looking at Quadric Software and storware, Quadric Software is doing the cbt backup exactly as needed, i got there description on the workflow yesterday
*When you run an ABD/hypervisor backup, the A3 will snapshot the VM for the duration of the backup data acquisition phase. After the datea is collected, the snapshot is immediately deleted.
In the case of CBT backups, the snapshot is deleted with the special XAPI command vdi-data-destroy, which frees data associated with the snapshot, but retains metadata, including the block allocation for the disk. This allows us to perform a delta backup the next time, with extremely negligible storage overhead.*
This is what we need
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RE: Why does the backup use snapshots and not CBT
@olivierlambert indeed, what about xenserver compatible backups solutions, can they work on xcp as well? I see we could maybe use agent based backups inside the vms for the larger ones, i will test this with one vm, but need a proper solution in the future, i believe if we can get this to work in xoa that would be the best solution.
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RE: Why does the backup use snapshots and not CBT
Are there any 3th party backup solutions on xcp that support this?
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RE: Why does the backup use snapshots and not CBT
@olivierlambert ok would be great if we can get this working, will be a huge improvement.
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RE: Why does the backup use snapshots and not CBT
@olivierlambert the current backup method is not suitable for larger vms, if i understand correct on xenserver cbt is allready the standard.
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RE: Why does the backup use snapshots and not CBT
@olivierlambert we are further in the process of using xcp, cbt would make a big difference, if u create a backup now on a large and heavy machine u will create a large snapshot during the day, coalesce this snapshot takes hours. If u create a snapshot at ghe start of a backup, copy only changed blocks and then delete the backup u only need to coalesce the small changes created during the backup. For large backups this is a game changer, we currently cannot move large vms to xcp as its backup is not suitable. When will this change? Is this planned?
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RE: Performance differences and higher cpu usage
@olivierlambert ok, will try this on one of the vms as well. what about the VGA switch? does this affect graphics inside the vm?