Re: NetBSD's LVM works great for me

[Swift Griggs <swiftgriggs%gmail.com@localhost>]

On Wed, 23 Mar 2016, Stephen Borrill wrote:
> It's been around since the -6 era, so it's not that new.

Ah, I see. For some reason, I never messed with it in 6.x. Sorry for the 
misinformation.

> I don't think any major development has been done on LVM since it was 
> committed which is a shame as, while solid, it has missing features as 
> you describe.

From what I can tell, it was done on a contract to Sistina Software UK. At 
least, that's what's in the man page. Maybe the maintainers/devs are $$$ 
only and so nobody has picked it up and gave the code a big hug, yet. I'm 
not complaining, just observing. I know it's a lot of work.

> I would add multipathing as a wish-list item too.

Oh, that would rock. Yes, indeed. On a more spacey note, I wish 
multipathing could be better handled by the hardware. Ie.. some firmware 
setting on a dual/quad-port HBA. I've seen this on crappy hardware-based 
iSCSI ethernet HBAs, but never for fiber. I guess that doesn't help much 
if you use discrete cards. Plus, software MPIO probably gives you a lot 
more options for load balancing et al.

> Have you looked at HAST in FreeBSD?
> https://wiki.freebsd.org/HAST

I had when they announced it but I forgot about it. Thanks for reminding 
me. Their page says they now have an async mode. I wonder how much it can 
buffer ala DRBD-proxy. I guess it's time to test it out and get some time 
on the metal so I know for sure. In my opinion, the holy grail for 
database servers is to have full-speed local access to storage, while 
keeping replicated to somewhere in Timbuktu in near-time for DR etc...

-Swift