Comments on: Backup 3. http://www.friday.com/bbum/2005/09/21/backup-3/ ...so google can organize my head. Thu, 20 Nov 2008 15:08:52 +0000 http://wordpress.org/?v=2.6.3 By: bbum’s weblog-o-mat » Blog Archive » Recovering Disk Images with DiskWarrior http://www.friday.com/bbum/2005/09/21/backup-3/#comment-716 bbum’s weblog-o-mat » Blog Archive » Recovering Disk Images with DiskWarrior Mon, 20 Feb 2006 18:17:17 +0000 http://www.friday.com/bbum/?p=524#comment-716 [...] I know that recovery works because it has saved my ass a number of times. [...] [...] I know that recovery works because it has saved my ass a number of times. [...]

]]> By: Jim http://www.friday.com/bbum/2005/09/21/backup-3/#comment-600 Jim Mon, 23 Jan 2006 01:38:20 +0000 http://www.friday.com/bbum/?p=524#comment-600 Thanks Bill. I did file a bug when I first encountered the issue, but didn't include any metrics. I will try to do that soon, and append the information to the bug. Thanks Bill. I did file a bug when I first encountered the issue, but didn’t include any metrics. I will try to do that soon, and append the information to the bug.

]]> By: bbum http://www.friday.com/bbum/2005/09/21/backup-3/#comment-577 bbum Sat, 21 Jan 2006 18:54:24 +0000 http://www.friday.com/bbum/?p=524#comment-577 My backup set hovers at around 40 or 40 gigabytes. I find that Backup also consumes a lot of memory and the system pages a lot right after the backup. Given what it is doing, it would seem to be a pathological case for the virtual memory and I/O subsystems. Both are optimized around relatively frequent access to a small set of files and BackUp is doing the exact opposite. Typically, BackUp is the only app that is active (I generally back things up when I go to lunch or overnight), so the system has even more reason to think that BackUp should be able to grab all resources. Certainly, the implementation could be optimized around <i>not</i> triggering the pageout of everything else. File a bug, please. Grab some metrics, if you can. A log of vm_stat during the backup and immediately after or the like. My backup set hovers at around 40 or 40 gigabytes. I find that Backup also consumes a lot of memory and the system pages a lot right after the backup. Given what it is doing, it would seem to be a pathological case for the virtual memory and I/O subsystems. Both are optimized around relatively frequent access to a small set of files and BackUp is doing the exact opposite. Typically, BackUp is the only app that is active (I generally back things up when I go to lunch or overnight), so the system has even more reason to think that BackUp should be able to grab all resources.

Certainly, the implementation could be optimized around not triggering the pageout of everything else. File a bug, please. Grab some metrics, if you can. A log of vm_stat during the backup and immediately after or the like.

]]> By: Jim http://www.friday.com/bbum/2005/09/21/backup-3/#comment-573 Jim Sat, 21 Jan 2006 14:30:48 +0000 http://www.friday.com/bbum/?p=524#comment-573 Backup is simple, but well executed and meets most of my needs for simple reliable backup. But every-time I sit down at my machine in the morning it pages like crazy. Backup chews through enormous amounts of memory (this machine has 1.5GB) while working. How big is your home directory? At 500k+ files, Backup clearly has scaling issues... Backup is simple, but well executed and meets most of my needs for simple reliable backup. But every-time I sit down at my machine in the morning it pages like crazy. Backup chews through enormous amounts of memory (this machine has 1.5GB) while working. How big is your home directory? At 500k+ files, Backup clearly has scaling issues…

]]> By: robbevan.com » Giving .Mac the chop http://www.friday.com/bbum/2005/09/21/backup-3/#comment-181 robbevan.com » Giving .Mac the chop Mon, 10 Oct 2005 13:47:08 +0000 http://www.friday.com/bbum/?p=524#comment-181 [...] [Update:] One of the things I did like about .Mac was Apple’s Backup app, which at version 3 was finally worthy of its name. Here’s a way to replicate Backup’s handy ‘Personal Data and Settings’ plan using rsync and Strongspace. Posted by Rob Bevan in: Software [...] [...] [Update:] One of the things I did like about .Mac was Apple’s Backup app, which at version 3 was finally worthy of its name. Here’s a way to replicate Backup’s handy ‘Personal Data and Settings’ plan using rsync and Strongspace. Posted by Rob Bevan in: Software [...]

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