Journaling Filesystems and Network Mirroring?

CustomDesigned asks: "We are looking at the feasibility of mirroring all changes to selected filesystems to a hot backup over an internet or WAN link. This would provide a degree of protection for a business in the wake of a disaster like Sep 11. It seems that journaling filesystems have much of the work already done. All that is needed is a hook to copy log data into a message queueing system for delivery to the hot backup, and then running fsck for the unmounted file system to apply each log update. (This is more complex for ext3 where the log data is kept internally within the filesystem.) One problem is that JFS (and I presume ext3) only journal filesystem metadata. Has anyone seen a fully journaling filesystem? Is there any other work on remote hot backups for Linux? The toolset for any such capability should include a way to measure bandwidth required for a given filesystem without actually doing it. This would allow intelligent administrative decisions to balance bandwidth costs against traditional removable media backups."

Comments

Re:I found something about this.

[Linux_ho]

Right you are, Captain. Have you noticed how many ask slashdot's there are lately? And, as you imply, most of them could be answered with a quick Google search. My theory is that these ask slashdot's are less work for Taco and his gang. See, with a regular story submission, they have to follow the link and make sure it's not a goatse. With the ask slashdot, they just have to post the stupid question.

Actually, I think it's just Cliff. All these recent lame stories have been posted by him. I was starting to think that he was just posting anything even slightly relevant that gets submitted to Ask Slashdot. So, last night I submitted a troll. I'm very sad that it was rejected, but at least it proves that they actually LOOK at the question before they post it. My question was as follows:

Ask Slashdot: HOWTO for Search Engine Skills?
I keep getting questions from clueless friends about how to find specific information on the Net. I'm starting to get annoyed, and sending them a link to Google explaining what I did hasn't helped them clue in. Does anyone know where to find a good HOWTO for using Google effectively?

If he had posted THAT, I would have died laughing.

While the current story could very quickly be resolved by a Google search, at least it's an interesting topic. I really got pissed when Cliff posted the one a couple days ago, something like, "Ask Slashdot: Don't you just HATE it when people don't QUOTE properly in E-MAIL?" When I saw that, I thought they should change the tag line to "News for Nerds, Stuff that Matters, and Geeks' Petty Annoyances."'