HAST + ZFS + NFS + CARP

[Julien Cigar]

On Fri, Jul 01, 2016 at 04:44:24PM +0200, InterNetX - Juergen Gotteswinter wrote:
> dont get me wrong, what i try to say is that imho you are trying to
> reach something which looks great until something goes wrong.

I agree..! :)

> 
> keep it simple, stupid simple, without much moving parts and avoid
> automagic voodoo wherever possible.
> 

to be honnest I've always been relunctant to "automatic failover", as I
think the problem is always not "how" to do it but "when".. and as Rick
said "The simpler/reliable way would be done manually be a sysadmin"..

> Am 01.07.2016 um 16:41 schrieb InterNetX - Juergen Gotteswinter:
> > Am 01.07.2016 um 16:39 schrieb Julien Cigar:
> >> On Fri, Jul 01, 2016 at 03:44:36PM +0200, InterNetX - Juergen Gotteswinter wrote:
> >>>
> >>>
> >>> Am 01.07.2016 um 15:18 schrieb Joe Love:
> >>>>
> >>>>> On Jul 1, 2016, at 6:09 AM, InterNetX - Juergen Gotteswinter <jg at internetx.com> wrote:
> >>>>>
> >>>>> Am 01.07.2016 um 12:57 schrieb Julien Cigar:
> >>>>>> On Fri, Jul 01, 2016 at 12:18:39PM +0200, InterNetX - Juergen Gotteswinter wrote:
> >>>>>>
> >>>>>> of course I'll test everything properly :) I don't have the hardware yet
> >>>>>> so ATM I'm just looking for all the possible "candidates", and I'm 
> >>>>>> aware that a redundant storage is not that easy to implement ...
> >>>>>>
> >>>>>> but what solutions do we have? It's either CARP + ZFS + (HAST|iSCSI), 
> >>>>>> either zfs send|ssh zfs receive as you suggest (but it's
> >>>>>> not realtime), either a distributed FS (which I avoid like the plague..)
> >>>>>
> >>>>> zfs send/receive can be nearly realtime.
> >>>>>
> >>>>> external jbods with cross cabled sas + commercial cluster solution like
> >>>>> rsf-1. anything else is a fragile construction which begs for desaster.
> >>>>
> >>>> This sounds similar to the CTL-HA code that went in last year, for which I haven’t seen any sort of how-to.  The RSF-1 stuff sounds like it has more scaling options, though.  Which it probably should, given its commercial operation.
> >>>
> >>> rsf is what pacemaker / heartbeat tries to be, judge me for linking
> >>> whitepapers but in this case its not such evil marketing blah
> >>>
> >>> http://www.high-availability.com/wp-content/uploads/2013/01/RSF-1-HA-PLUGIN-ZFS-STORAGE-CLUSTER.pdf
> >>>
> >>>
> >>> @ Julien
> >>>
> >>> seems like you take availability really serious, so i guess you also got
> >>> plans how to accomplish network problems like dead switches, flaky
> >>> cables and so on.
> >>>
> >>> like using multiple network cards in the boxes, cross cabling between
> >>> the hosts (rs232 and ethernet of course, using proved reliable network
> >>> switches in a stacked configuration for example cisco 3750 stacked). not
> >>> to forget redundant power feeds to redundant power supplies.
> >>
> >> the only thing that is not redundant (yet?) is our switch, an HP Pro 
> >> Curve 2530-24G) .. it's the next step :)
> > 
> > Arubas, okay, a quick view in the spec sheet does not seem to list
> > stacking option.
> > 
> > what about power?
> > 
> >>
> >>>
> >>> if not, i whould start again from scratch.
> >>>
> >>>>
> >>>> -Joe
> >>>>
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> > 
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-- 
Julien Cigar
Belgian Biodiversity Platform (http://www.biodiversity.be)
PGP fingerprint: EEF9 F697 4B68 D275 7B11  6A25 B2BB 3710 A204 23C0
No trees were killed in the creation of this message.
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