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Kopia – Fast and Secure Open-Source Backup

kopia.io

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Re: Kopia – Fast and Secure Open-Source Backup

#41

Post by aidenn0 »

Scaevolus wrote: post #8
gingerlime wrote: post #3

I wonder how it compares to restic or borg. Besides the gui anyway…

Restic doesn't support compressing backups, and kopia does. Otherwise, the architectures appear to be very similar.

For local backups, compression is less of an issue; for things that are compressible, transparent file system compression seems to get about 110% the size of what I would get by any non-CPU bound levels of compression using a tgz. Since (as others in this thread have noted), compressible files tend to also be smaller files (the only exception I can think of would be if your log rotation doesn't compress old logs), the fact that only a fraction of what I backup is 10% larger is kind of "okay." When you're sending across the network though it can be a big deal.

Re: Kopia – Fast and Secure Open-Source Backup

#42

Post by brimstedt »

ntolia wrote: post #37
encryptluks2 wrote: post #34

Can I get some recent performance benchmarks vs restic? I only recently switched to restic and for the most part it is great (definitely an improvement from CrashPlan IMO), but it seems like this might actually have a few improvements to make it worth considering switching from restic.

I ran some performance benchmarks not too long ago. https://blog.kasten.io/benchmarking-kopia-architecture-scale...

Thanks.

It would have been interesting with restore times as well.

Quite important if it will take you an hour or a day to restore..

L

Re: Kopia – Fast and Secure Open-Source Backup

#43

Post by MikusR »

aidenn0 wrote: post #41
Scaevolus wrote: post #8

Earlier quoted context omitted.

Restic doesn't support compressing backups, and kopia does. Otherwise, the architectures appear to be very similar.

For local backups, compression is less of an issue; for things that are compressible, transparent file system compression seems to get about 110% the size of what I would get by any non-CPU bound levels of compression using a tgz. Since (as others in this thread have noted), compressible files tend to also be smaller files (the only exception I can think of would be if your log rotation doesn't compress old logs), th…

On disk the backups are encrypted, that means no transparent compression.

Re: Kopia – Fast and Secure Open-Source Backup

#45

Post by nsriv »

_def wrote: post #10
MikusR wrote: post #2

It has a gui and works on Linux/Windows/MacOS. Also has both deduplication and compression.

Finally! I've been waiting patiently for a open source x-platform solution that ticks those boxes. edit: ah, nevermind. I just tried it and I'm sure it's great for online backups. But not so well suited for backups on a plain usb hdd.

Pretty sure it allows and works with local USB storage as well, covered in documentation here: https://kopia.io/docs/repositories/#local-storage.

Re: Kopia – Fast and Secure Open-Source Backup

#46

Post by isbvhodnvemrwvn »

MikusR wrote: post #43
aidenn0 wrote: post #41

Earlier quoted context omitted.

For local backups, compression is less of an issue; for things that are compressible, transparent file system compression seems to get about 110% the size of what I would get by any non-CPU bound levels of compression using a tgz. Since (as others in this thread have noted), compressible files tend to also be smaller files (the only exception I can think of would be if your log rotation doesn't compress old logs), th…

On disk the backups are encrypted, that means no transparent compression.

For people who haven't dealt with this - a good encryption scheme produces output which you can't tell apart from a purely random stream of bits - it has very high entropy, and is therefore not compressible.

Re: Kopia – Fast and Secure Open-Source Backup

#47

Post by rglover »

lucb1e wrote: post #17

Another one? Ten years ago I had trouble finding anything, then over time I learned of duplicity (2002?!¹), bup (2010), restic (2015), borg (2010)... all basically solving the same problem of encrypted incremental backups. The landing page doesn't mention why they made yet another solution. In the comments someone also mentions bvckup2. Is there an overview somewhere of all the different solutions? Any selling points…

Easy on the gas, bud.

Re: Kopia – Fast and Secure Open-Source Backup

#48

Post by jeremyw »

ntolia wrote: post #38
gingerlime wrote: post #3

I wonder how it compares to restic or borg. Besides the gui anyway…

You can see some of the performance differences here - https://blog.kasten.io/benchmarking-kopia-architecture-scale...

Note this compares an older restic version that doesn't include the order of magnitude improvements in cloud communication.

Re: Kopia – Fast and Secure Open-Source Backup

#49

Post by dsego »

rkalla wrote: post #13

Any discussion about backup should always include a shout out to one of the most beautiful versions of this: bvckup2 About 10 years ago the founder just decided to start writing the most streamlined, beautiful pieces of software he could - obsession around NTFS nuances to improve performance and reduce overhead to an unbelievable degree. 10 years later, it's still him (and maybe a few other folks) and the software is…

On Mac the most polished is Bombich's Carbon Copy Cloner, it's a thing of beauty. I might go back to Mac just for that piece of software alone.

Re: Kopia – Fast and Secure Open-Source Backup

#50

Post by z77dj3kl »

The only thing I need (and is sorely missing from Restic) is that the metadata be kept separate from the actual data. That way I can store the data in AWS S3 Deep Glacier at a cost of nothing per year, and still do incremental backups. Currently the architecture of Restic for instance requires all data to be quickly and cheaply accessible; which makes it impossible for this.

I have terabytes of data that I'd be happy to dump encrypted and compressed in Deep Glacier and happy to pay $500 to retrieve if I were to mess up my hard drives, but otherwise don't want to pay for the costs of normal S3.

Does Kopia separate metadata from the actual encrypted/compressed blobs?

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