On 12/26/14 01:38 AM, Garrett D'Amore wrote:
Probably I should avoid the term HA since this means so very many different
things to different people.
I hoped you would explain what different types of OS-based HA there are.
Putting it all together requires a certain degree of skill and that is why you
wind up paying for something like RSF-1 instead of building it yourself.
This recommendation of mixture of open source base and closed
source-for-profits baffles me...
Not only that it presents vendor lock-in (and spying/security problem on
unaudited code and binaries), but you consider removing functionality
from kernel that already worked and could work again, to support closed
source solutions of some external vendor, not contributing back to
project or contributing patches that favors their proprietary code?
Things you mentioned worked just fine in 2009.06 Opensolaris release,
considering openHA.
I had a PDF describing how you make both redudant storage using ISCSI
exported volumes, based on ZFS zvol's and all that with just 2 machines.
And that was the firs thing I used to learn after touching Opensolaris:
https://web.archive.org/web/20130215192928/http://hub.opensolaris.org/bin/download/Project+colorado/files/Whitepaper-OpenHAClusterOnOpenSolaris-external.pdf
If you talk about having real cluster (where multiple machines behave
like they are one at OS level) I bet that also worked and source was
available.
Removing such great thing that obviously everybody needs and
recommending proprietary products (together with Apple model and
software) does not sounds fair to rest of illumos ecosystem users.
People used to call Solaris "slowaris" because, over years, on
benchmarks it used to behave marginally slower on some tests , instead
of quick&dirty Linux way of implementing things without good Solaris
design..
That is why Solaris was known to Scale well and I bet it needs much less
manpower and time to make open source Solaris cluster work then
re-inventing it (and from closed source...)
If someone want every bit of performance, made in quick&dirty way, one
might better use Linux.
Closed source gets open only when one buy Whole companies for large sums
of money and that is what Sun Microsystems used to do before releasing
Opensolaris. It's not funny.
If you're willing to spend the money to build this HA system you probably also
want commercial support and the sanity of mind knowing that it is battle tested.
Of course none of this needs the fancy kernel support that Solaris Cluster
used. So it's totally orthogonal to my earlier questions.
Btw we built this sort of HA solution for NFS and iSCSI at DEY (and then some!)
I would love to see that work open sourced but for that to happen someone
would have to first buy the IP.
Sent from my iPhone
On Dec 25, 2014, at 3:34 PM, Nikola M. via illumos-discuss
<[email protected]> wrote:
On 12/23/14 07:53 PM, Garrett D'Amore via illumos-discuss wrote:
For various reasons, I’m trolling through the bowels of the illumos IP stack,
and there is a bunch of stuff there to support the Solaris Cluster product.
This is an HA clustering solution offered by Oracle on Solaris. It does a fair
bit in the kernel.
In theory Oracle open sourced the HA cluster product a while ago. I can’t find
the source at the moment, though.
There is interesting talk on illumos HA I stumbled upon today:
http://www.percona.com/blog/2013/05/24/zfs-on-linux-and-mysql/#comment-1768682
Seems like there is hunger for illumos HA server solution for ZFS and
applications,
because cheapest one that works is closed source (bad bad bad proprietary
spying closed source)
and costs 5000USD for a pair of servers.. annually..
I have OpenHA source copied somewhere but I would need some time to dug it out,
feel free to patch it in if someone have it too.
I remember that in 2009 on my Opensolaris workshop, first thing that we used to
work on was actually HA and it is missed since 2009.06 release.
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