Change the size of the backup file

a573

Hi ALL,

How do I change the size of the XO backup file?

I want to increase the size of the backup file that XO creates from 2MB to about 200MB.

I back up from XO to QNAP. Replicating from QNAP to cloud at low frequency.
Because of the large number of files, the number of API calls is wasted. The purpose is to increase the file size and reduce the number of files.

ls -plah fe96dbe9-0d78-50a9-4624-7ea0f9ccb1aa/vdis/19217d2e-d234-4f2c-85c1-ecf49cb2389f/045c97cf-ab7f-4915-ab3e-a79165674dbc/data/83945dbd-9580-4d01-92c6-a1cf6e12891a.vhd/blocks/0
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olivierlambert

2MiB is not a random value, it's the size of a VHD block. That's how we can just rename or remove blocks on the fly to reduce the burden of doing a coalesce on the backup repo.

If we group blocks with larger size, it means we'll need to get far bigger quantity of non-relevant blocks to merge (100 more with 200MiB file size).

I'm not sure to understand exactly your issue in the first place, can you be more explicit about the "why" of your question?

a573

@olivierlambert said in Change the size of the backup file:

My problem is that I get too many "api list file names called" calls to Backblaze.

My structure is a little complicated. Incremental backup from XO to QNAP. Using QNAP's cloud sync function, I'm slowly backing up my XO backup files to Backblaze.

The my goal was to get the backup done fast locally, and the cloud transfer done slowly with limited internet bandwidth.

At this time, we noticed that the number of file list calls was abnormally high and Backblaze charges a lot during the cloud transfer.

I think this is because QNAP's cloud sync function keeps checking the number of files on the cloud side. I thought it would be solved by changing the block size that XO outputs.

If you back up to the cloud using an S3-compatible backup as a remote server on the XO, does that significantly reduce the number of file references? I haven't experimented yet.

olivierlambert

Question for @florent but I would advise to use mirror backup with S3 from your "fast" local backup repository, it's exactly the use case.

a573

@olivierlambert said in Change the size of the backup file:

Thank you olivierlambert and florent.

I'm experimenting with direct backups from XO to Backblaze.
I will report the results of the experiment again.