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| -rw-r--r-- | 2021-05-24-backup-tech.md | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/2021-05-24-backup-tech.md b/2021-05-24-backup-tech.md index 5f09c93..1382c05 100644 --- a/2021-05-24-backup-tech.md +++ b/2021-05-24-backup-tech.md @@ -1,6 +1,6 @@  -Broc, [`commons.wikimedia.org/wiki/File:Cat_into_the_box.jpg`](https://commons.wikimedia.org/wiki/File:Cat_into_the_box.jpg) +Broc, [`commons: Cat_into_the_box.jpg`](https://commons.wikimedia.org/wiki/File:Cat_into_the_box.jpg) ----------------------------------------------------------------------------- @@ -25,7 +25,7 @@ The end. That's all you need to know about backups. ----------------------------------------------------------------------------- -OK, so there's a little more to it. +OK, so there's a little more to it, sometimes. ----------------------------------------------------------------------------- @@ -47,6 +47,10 @@ OK, so there's a little more to it. ----------------------------------------------------------------------------- +Everything is too difficult, and takes too much effort. + +----------------------------------------------------------------------------- + # Incremental backups Compare live data against most recent backup. If file has hasn't @@ -65,7 +69,7 @@ of making a new copy. ----------------------------------------------------------------------------- -# De-duplication +# De-duplication, chunking Store each distinct bit of data only once, across all backups. @@ -180,7 +184,13 @@ data -> backup [label="run tool"]; } ~~~ -The end. That's all you need to know about backups. +The end. That's all you **should** need to know about backups. + +----------------------------------------------------------------------------- + + + +Dano, [`commons: Danger_thin_ice_keep_off`](https://commons.wikimedia.org/wiki/File:Danger_thin_ice_keep_off_(287326530).jpg) ----------------------------------------------------------------------------- @@ -207,15 +217,15 @@ data -> backup [label="just happens"]; # My current crazy idea: Peer to peer backups -Safe, secure, without having to provide separate backup space. +Safe, secure, without having to provide separate backup space, run a +server, buy a disk, or pay someone for a service. -Backup software comes as port of the operating system by default, and +Backup software comes as part of the operating system, and runs automatically, when data changes, in a way that doesn't bother -the user. (Feasible for Linux distributions. The rest of the world -will follow.) +the user. You allow others to store some of their backups on your computer, and -they let you store some of yours on theirs. +they let you store some of yours on theirs. Quid pro quo. Network effect: this works better the more people use it. @@ -257,7 +267,7 @@ Attribution-ShareAlike 4.0 International ([CC BY-SA 4.0][]) licence. --- title: "Introduction to backup technology" -subtitle: "An opinionated view" +subtitle: "An opinionated overview" author: "Lars Wirzenius" date: "2021-05-24" ... |