Bvckup blog. Assorted notes on the design of fast real-time backup software.

Master Feature List - a comprehensive list of features getting done in V2 is now available.

If you are subscribed to the updates, you will be receiving an email shortly with a link that lets you vote features up and down.

Check it out here -

Bvckup and Bvckup2 sites have been moved to a new server. The has been moved to the same server as well. Should you notice any 404s, empty looking pages, strange messages or something equally amusing, do let me know.

A classification of data backups, and how conventional backups (do not) really fit in.

Check it out -

In the spirit of documenting changes that are obvious, but only in retrospect I want to go over a new versioning scheme that I am adopting for Bvckup. Its executive summary is -

No more dotted version numbers.

In other words, “Bvckup” becomes “Bvckup 2, revision 37” …or thereabouts.

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Just a quick post to share something that seems obvious in retrospect, but took a while to notice and fix.

A mailing list for those wanting to follow Bvckup and Bvckup 2 progress has been up and active over a year now. Subscribing to the list triggers a typical confirmation email with a link that needs to be clicked on. The odd thing was that a good half of those subscribed never bothered to do that.

So last month, after receiving a small rush of sign-ups from I decided to put things in order and run a bit of A/B testing. Good thing I did.

Simply changing the email subject from this

to this

increased the number of completed subscriptions from 51% to 82%.

The original subject read like… well… a confirmation rather than something that requested an action and people simply did not bother even opening an email. A simple but costly oversight that took me almost two years to realize.


There is a thread for that:

Made it to BetaList yesterday and wow, just wow. Steady thick stream of traffic and trending up on their weekly list of populars too.

Thanks for the sign-ups, mentions and tweets, guys! Very much appreciated. And a big round of applause to Mr. Köhlbrugge for conceiving such a useful site.

I described several technical aspects of Bvckup 2 while it was on reddit.

As the development moves forward I will be posting detailed performance numbers for each listed feature, but meanwhile take a look at the overview to get a general feel for the amount of optimization finding its way into V2.

So here it is - A technical overview of Bvckup 2

Two-day sponsored post on reddit is now live -

About one quarter through and there is 2300 unique impressions so far, about 40 click-throughs, plus a bunch of opinions which is what I am after. All in all this seems to be beating Adwords hands down.

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