On Sat, Apr 05, 2008 at 10:11:00AM +1100, John Ferlito wrote: > Keeping in mind I've never done this so no idea how well it works. I'd > say a combination of > > Global File System - http://sources.redhat.com/cluster/gfs/ I think the requirements where for no STOMITH and GFS uses that in both incarnations, so does ocfs, psfs
> and > Global Network Block Device - http://sourceware.org/cluster/gnbd/ > > should do the trick, this document explains how > http://sources.redhat.com/cluster/wiki/DRBD_Cookbook?highlight=(CategoryHowTo) > > On Sat, Apr 05, 2008 at 09:52:55AM +1100, Crossfire wrote: > > I've just spent some time quickly researching this to no real satisfaction. > > > > What I'm looking for is a way to do real-time hot-replication of a whole > > filesystem or filesystem tree over 2 nodes (and strictly 2 nodes) without > > STOMITH[1]. > > > > The scenario is I have two identical systems with local (software) RAID1. > > They will be tethered onto their internet feed via ethernet, and can > > optionally be tethered to each other via Gig. > > > > I want to be able to set it up so /home (and maybe other filesystems) are > > replicated from one to the other, in both directions, in real time so they > > can run in an all-hot redundant cluster. > > > > The environment should be mostly read-oriented, so I can live with > > write-latent solutions as long as they handle the race/collision > > gracefully (preferably by actually detecting and reporting it if they > > can't avoid it). > > > > The options I've investigated so far: > > > > * Lustre (MDS requirements[2] make this not an option) > > * GlobalFS (STOMITH requirements make this not an option. Oriented > > towards shared media too, which I am not using) > > * tsync (Naive concurrent operation model, but otherwise viable) > > * MogileFS (not quite what I was looking for, but none the less useful). > > * OpenAFS (read-only replication only, loss of the node hosting the > > write volume still renders the volume unwritable). > > > > Is anybody aware of any other options that I've missed? > > > > C. > > > > [1] "Shoot The Other Machine In The Head" - the ability for any node to > > forcibly powerdown any other node believed to be malfunctioning. > > [2] Single instance MDS only, only clusterable through shared storage. > > d'oh. > > [3] People suggesting rsync will be taken out back and shot for not > > reading the requirements. > > -- > > SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ > > Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html > > > > -- > John > http://www.inodes.org/ > -- > SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ > Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html > -- "It is clear our nation is reliant upon big foreign oil. More and more of our imports come from overseas." - George W. Bush 09/25/2000 Beaverton, OR
signature.asc
Description: Digital signature
-- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
