The tool you want (which most closely resembles Time Machine) is called rsnapshot. Unlike normal backup tools it copies only things that have changed, and it allows you easily to travel to many points in time. You can tell it how much disk space it is allowed to have, and it adjusts the number of snapshots kept to stay within that limit. A very nice tool.
Addendum: I recently bought a new laptop, preinstalled with Vista. I figured I wanted to preserve vista somewhere, in case I wanted to try it out at some point, so the first time I booted the computer (with a linux livecd), I did this:
Partimage will only copy data from the used portions of the partition. For speed and efficiency, free blocks are not written to the image file. This is unlike the 'dd' command, which also copies empty blocks.
I use a two-fold strategy: #1 is LVM snapshots and number two is rsnapshot, which I use to make point-in-time backups to a dedicated external hard disk drive. The external hard disk drive is placed so that I can easily yank it on my way out the door should something bad happen. I don't (yet) use an off-site mechanism other than periodically burning a snapshot to a series of encrypted DVD discs and shipping them to a friend's place in another city for storage.
I highly recommend rsnapshot because of the way it does the snapshots, using hard links for things that haven't changed. If your home directory goes bonkers, you can just take an rsnapshot copy and tarpipe or rsync it back to your new home partition after reinstalling or recovering from drive failure.
Several. There's the old fashioned dd(1), which is kind of arcane; there's dump(8) and restore(8); there are several open-source products around, like Amanda; and if you want, you can install ZFS and use a cron script to take periodic snapshots, giving you something effectively identical to Time Machine (see Tim Foster's weblog.)
If you're wanting a full image backup and restore type solution, like norton ghost, then I've found CloneZilla to work quite well. I boot the live CD, and then use another machine as an SSH server to backup/restore the image(s) to/from.
(I should mention: I did run into a bug a few years back that required me to download and install a newer version of GNU-tar. (Something to do with very long pathnames and multiple volumes.) No big deal. Just be aware that's always an option.)
Including /dev can be worthwhile. gnu-tar will handle devices properly (mknod). Though you probably won't use the backed up /dev during a restore. (Occasionally its nice to see what permissions or links you had set up before.)
SUN FILTERED THROUGH THE STAND of cedars. Bright enough to cause lens flare when I shot toward the scraggly close-knit cluster of trees shadowing the banks of the clear, fast-flowing Zumbro River.
In the quiet of this Sunday afternoon, and I cannot imagine any day being anything but quiet here in this secluded wide spot in the road, we meandered among the sculptures, shoes sinking into squishy earth tunneled by varmints.
As Randy and I wandered and examined and wondered aloud, my appreciation grew for this artist. I expect he worked alone here, drawn to the solitude of this rugged place in the valley. He was, perhaps, viewed as a bit of an odd fellow. Was he a poet? A farmer? A musician?
Katie, I have been waiting for you to comment because I knew you could answer my questions about the Jarrett rock garden. You are, after all, the one who first told me about this place. When I return in the spring to see the garden, with flowers in bloom, I will stop in. I also want to return to Plainview.
Randy and I were surprised to find so many of the houses gone now in Zumbro Falls. It looks so, um, empty. We did not drive all the way into Hammond as we found a lovely gravel road that we followed from Hammond along the Zumbro back to Zumbro Falls. It was the most beautiful drive.
Microsoft VSS can only provide individual volume-level snapshots. A single "Global" snapshot which includes all the volumes is not possible with VSS.
The Global drive snapshot option was intended for use with the legacy Volume Snapshot Provider (VSP).
When using WOFB with VSS, keep the "Snapshot usage" option set to "Individual drive snapshot"
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Since I originally joined, they updated their suggestions for who benefits the most from the Snapshot program. Of special note, this information is not presented to non-customers. Only customers can see this information once they are authenticated into their account portal. Their FAQs on the program definitely paint a rosier picture, too.
I saved one percent. Yes, $5.46. That was how much my privacy was worth. Following my six-month period, I earned a 12 percent discount, or about $96. For you mathematicians, you might have noticed that my percentage discount is not based on the same principal amount. This signaled to me that I should dig deeper.
As I surmised, Progressive increased my premiums by $95. One dollar shy of my discount of $96. Clever accounting. In full disclosure, I receive more discounts, but this is my base policy premiums. The discounts stayed the same. Thus, my privacy is worth one dollar, which is roughly 16 cents per month.
What was that peak on February 4th? It was me doing brake stands (burnouts) and I was trying to figure out how to disable Traction Control on my 2014 Mustang. Eventually, I figured it out. ?
I do have one prevailing concern. Currently, these devices are voluntary. Progressive and State Farm offer potential discounts for using them. I anticipate that the ROI of this data is far more valuable than what insurance companies let on through discounting. I worry that in the not-too-distant future, they will be mandatory and drivers will be penalized for opting out of their monitoring.
A full backup of a large data set may take a long time to complete. On multi-tasking or multi-user systems, there may be writes to that data while it is being backed up. This prevents the backup from being atomic and introduces a version skew that may result in data corruption. For example, if a user moves a file into a directory that has already been backed up, then that file would be completely missing on the backup media, since the backup operation had already taken place before the addition of the file. Version skew may also cause corruption with files which change their size or contents underfoot while being read.
One approach to safely backing up live data is to temporarily disable write access to data during the backup, either by stopping the accessing applications or by using the locking API provided by the operating system to enforce exclusive read access. This is tolerable for low-availability systems (on desktop computers and small workgroup servers, on which regular downtime is acceptable). High-availability 24/7 systems, however, cannot bear service stoppages.
Some volume managers also allow creation of writable snapshots, extending the copy-on-write approach by disassociating any blocks modified within the snapshot from their "parent" blocks in the original volume. Such a scheme could be also described as performing additional copy-on-write operations triggered by the writes to snapshots.
Some file systems, such as WAFL,[a] fossil for Plan 9 from Bell Labs, and ODS-5,[citation needed] internally track old versions of files and make snapshots available through a special namespace. Others, like UFS2, provide an operating system API for accessing file histories. In NTFS, access to snapshots is provided by the Volume Shadow-copying Service (VSS) in Windows XP and Windows Server 2003 and Shadow Copy in Windows Vista. Melio FS provides snapshots via the same VSS interface for shared storage.[2] Snapshots have also been available in the NSS (Novell Storage Services) file system on NetWare since version 4.11, and more recently on Linux platforms in the Open Enterprise Server product.
EMC's Isilon OneFS clustered storage platform implements a single scalable file system that supports read-only snapshots at the file or directory level. Any file or directory within the file system can be snapshotted and the system will implement a copy-on-write or point-in-time snapshot dynamically based on which method is determined to be optimal for the system.
On Linux, the Btrfs and OCFS2 file systems support creating snapshots (cloning) of individual files. Additionally, Btrfs also supports the creation of snapshots of subvolumes. On AIX, JFS2 also support snapshots.
Can I chance the parameters of the same amp between snapshots? I would like to have the amp e. g. with more gain in snapshot 1 and not so less gain in snapshot 2. (I know that I can integrate two amps - assumed Helix got enough resources - and choose only one per snaphot.)
You can also set one row of stomp buttons for snapshots and one for stomp mode - but then you can't navigate the patches as well I think - up to you. I'm using Snapshots on the bottom row and patches on the top. I like that and it has the added advantage that when I miss the second button on the bottom and hit the bank down instead (which I do all to regularly - would love wider spaced buttons) - you still see all your snapshots and you can just have another go at hitting the right one! I used to get into trouble with that on the old setup - I'd need to reselect my patch and then my preset. So It's win win as far as that goes!
1) Yes. You need to assign the desired amp parameter (e.g. Drive) to the Snapshots controller. You do this just like you would assign it to an expression pedal, in the Assign Controllers page. Then you can define a different setting for the Drive in each snapshot.
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