unicolet.org

Warning: this post is in a stream-of-consciousness form. Approach it accordingly. Figma recently posted a couple of articles ( one and two ) on the challenge they are facing to keep their database infrastructure up with the massive growth they are going through, and how they're solving it. The last article especially was re-shared in some of my circles, and my initial gut reaction to the articles can be summed up in the immortal words of Jeff Goldblum in Jurassic Park : “Your Scientists Were So Preoccupied With Whether Or Not They Could, They Didn’t Stop To Think If They Should” . After I (admittedly) quickly read the article a couple of times, I still did not "get it". IMHO is a red flag as critical infra stuff like that should be simple: simple to understand, simple to operate, simple to troubleshoot, simple to restore. Had I been in their position, what would I have done? I could have left the article at it, but I've made it an habit to never say something "n...

The ZFS filesystem has many features that once you try them you can never go back. One of the lesser known is probably the support for replicating a zfs filesystem by sending the changes over the network with zfs send/receive. Technically the filesystem changes don't even need to be sent over a network: you could as well dump them on a removable disk, then receive  from the same removable disk.

Whenever in a Sproutcore app a controller or a state needs to reference a view which is deeply nested in the ui tree there is a good case to use SC.outlet . The outlet creates a layer of indirection between the view and the other layers leaving to the view the responsibility to provide shortcuts to its inner objects, decoupling the layout from the application logic. An example of SC.outlet usage is shown in the todos application described in the Getting Started guides. Without outlet: ... TodosThree.mainPage = SC.Page.design({ // conventional design // https://github.com/sproutcore/getting-started/blob/master/apps/todos_three/resources/main_page.js#L4 ... TodosThree.SHOWING_APP = SC.State.design({ enterState: function() { TodosThree.mainPage.get('mainPane').append(); TodosThree.mainPage.mainPane.newTodoField.field.becomeFirstResponder(); }, Notice how the view design trickles down to the state layer (a part of the controller layer, which should be pre...