Installed S3QL version 2.28.

I use an S3 backend for storing data, with hourly backups. This has worked 
well for several years.

On June 24 this year I started creating snapshots, and the S3 costs seem to 
have linearly increased since then (see chart below), with the bulk of the 
new costs being APS2-EarlyDelete-SIA and APS2-Retrieval-SIA.

Since the data is relatively static (very little deleted, slow additions), 
my naive expectation was that with de-duping etc, there would be little or 
no impact. Yet I am seeing quite remarkable growth.

I should note that the total storage in that time has gone from 19GB to 
31GB, so not a huge increase.

The basic hourly process is:

- mount the S3 file system
- rsync -avr /my/local/data /my/s3/mountpoint
- unmount

(this syncs local data with the 'data' dir in the S3 mount point).

The basic daily operation is:

- mount the S3 file system
- s3qlcp /my/s3/mountpoint/data /my/s3/mountpoint/snapshots/<daily-dir>
- rsync -avr --delete /my/local/data /my/s3/mountpoint
- unmount

The additions in this process are the daily rsync with "--delete" and the 
s3qlcp; I do not expect the --delete is deleting many files based on log 
files of the operation.

Have I been hopelessly naive here? Or is there something I am missing in 
how this should work? What I had expected is that the snapshots would add 
little or no overhead.


[image: S3 costs.PNG]


I have now disabled the daily snapshots and will see if the costs reduce, 
but any help or insights would be appreciated.

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