Arq is great backup software. I would view inclusion of Glacier support as a worthy paid upgrade.

Arq is the pinnacle of my rather large backup pyramid which also includes: Dropbox, Superduper, Crashplan, rsync, SVN/GIT and more.

In an earlier version of Arq, there was no possibility to see which data was actually selected for backup (and which not). Has Arq become more user-friendly?

I'm a current user of ARQ, and it has, in my opinion (compared to Backblaze) a phenomenally user friendly description of exactly what is being backed up, and when, and when something was added, or modified.

I think the key here is not to just provide a toggle for using Glacier instead of S3, but to have the historical snapshots migrated to Glacier from S3 and deleted every 90+ days.

I will gladly pay more money for Arq again.

I think it would be more like choosing Glacier instead of S3 on a per-folder basis.

Arq is incremental backup. The data structure is similar to git's http://www.haystacksoftware.com/arq/s3_data_format.txt

Unless your files change a lot, keeping the latest backup version in S3 and previous versions in Glacier would mean that most of your backup data are still in S3 I think. Right?

Yes. The forthcoming S3 Lifecycle Policy API additions should allow for exactly this, automatically.

Just FYI, I too would view Glacier support as something worth a normal upgrade fee. I am using Arq more as a long-term back-it-up-and-forget-about-it storage solution anyway, so it seems like a natural direction to go for a user like me (same strategy, but even lower cost).

That said, I am reminded that I should not forget about the Arq backups and do a few test restores sometime. :)

As long as you promise to have the glacier update be a free one, I am buying an Arq license this evening the moment you tell me it will be so! :)

As a happy customer, I'm glad to hear this as well!

That would be fantastic.

That's Mac-only, right? Can anyone suggest an equivalent Windows tool for backing up to Amazon?

Jungledisk, Duplicaty (LGPL)

That would be Duplicati -- my favorite backup utility.

There's Cloudberry Backup. I haven't used it myself, and I'm told it's not versioned backup, but it backs up to your own AWS account.

Wow, yes, please do! I've never used Arq, and at the S3 prices it doesn't make sense on top of my Dropbox. But with Glacier, I'd love to be able to back up my entire HDD off-site for $5/month, and Arq looks like a good way to do that.

I will start using Arq when it supports Glacier. When will it be ready ;)

I'm a happy Arq customer today and I'd pay for an upgrade to Glacier! Longer term I'm sure you will have competitors on Glacier that you will be competing with so best to move sooner than later.

Please!!! I'm a very happy Arq customer, this update would be awesome!

Arq, please add support for Glacier. - Happy customer.

I'll buy Arq immediately when Glacier gets added

Me too. If it was not for the recurring cost of S3, I would have bought ARG already. It's brilliant software.

Yes please!

Do IT! Fred