Xenserver and Storage
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How much storage do you need (allow for future growth)? Is HA required? If not, you could likely get away with using XO's Continuous Replication feature.
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@danp said in Xenserver and Storage:
How much storage do you need (allow for future growth)? Is HA required? If not, you could likely get away with using XO's Continuous Replication feature.
I think I would like HA enabled, as for capacity, we currently have 12Tb useable on the SAN, and use around 4.7Tb of it (well allocated, actual use is around 4.9Tb). So I am thinking 10Tb or more would suffice.
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Indeed, XOSAN could fill the gap and create a "VSAN" like solution.
However, if you don't plan to get bigger than 2 hosts, you can also take a look a "HA lizard" (which is basically a DRBD block replication between 2 local storages).
Anyway extra questions:
- do you have RAID support in your XS host machines?
- would you like to add hosts in the future? (if you think it's yes, HA lizard is out of the equation)
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@olivier said in Xenserver and Storage:
Indeed, XOSAN could fill the gap and create a "VSAN" like solution.
However, if you don't plan to get bigger than 2 hosts, you can also take a look a "HA lizard" (which is basically a DRBD block replication between 2 local storages).
Anyway extra questions:
- do you have RAID support in your XS host machines?
- would you like to add hosts in the future? (if you think it's yes, HA lizard is out of the equation)
Yes, there is RAID support in the two hosts. And no I do not think I'll be adding hosts anytime soon. We have plenty of growth in these two hosts.
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@olivier said in Xenserver and Storage:
would you like to add hosts in the future? (if you think it's yes, HA lizard is out of the equation)
I believe HA Lizard is not limited to two hosts.
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@jrc So HA lizard could do the trick in your case (or you can set ip up manually, basically DRBD between 2 hosts)
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@danp I don't think it could do more than that because that's block replication without a cluster FS.
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@olivier From their FAQ --
Is HA-Lizard only for 2-node pools?
No. HA-Lizard works with any number of hosts within a pool and provides reliable high availability in a 2-node pool.
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It very likely means: replicate blocks are made on 2 nodes, and then other pool members are connected to this setup. It doesn't mean storage is scaled on all local SR within all hosts.
That's also something you could do on XOSAN: use a limited number of hosts to store data (from 2 to n). But you could also use all of them.
So in HA Lizard case, it means if you lose 2 hosts on a 16 pool for example, your data is gone.
Hope it's more clear this way
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Halizard can work, but I'd highly recommend paying for support. I had issues with it, and while support was awesome, it's not something worth deploying yourself.
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You could also look at starwinds vsan and use either a windows controller on each server, or go with the linux controllers that they recently released.
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@dustinb3403 said in Xenserver and Storage:
You could also look at state d's vsan and use either a windows controller on each server, or go with the linux controllers that they recently released.
State D?
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@reid-cooper spellcheck on mobile, I corrected it. Starwinds.
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That makes a bit more sense.
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@olivier I would not do HA Lizard, it is problematic with XenServer. You can ask @StorageNinja . I have gone through many SW posts having issues with this. I did recommend it once but it was not worth it. XOSAN will be much better
https://xen-orchestra.com/blog/xenserver-hyperconverged-with-xosan/
or if you can afford two more host with WIndows Server and StarWind VSAN then it would be good too. -
@dbeato You can completely skip Windows and use the Linux VSAN controllers.
https://www.starwindsoftware.com/announcing-new-linux-based-starwind-virtual-storage-appliance-video
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@dustinb3403 Even more amazing!! Thanks for the share. I didn't know.
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@dbeato said in Xenserver and Storage:
@dustinb3403 Even more amazing!! Thanks for the share. I didn't know.
Yup, pretty much makes the setup impossible to beat, as you don't ever need to introduce Microsoft into the environment.
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Can someone give me an overview what a VSAN setup would physically and software wise look like. Sounds like there is a controller involved, would this run on the host? Both hosts? Stand alone hardware?
What is the general cost for Starwind's VSAN stuff? Is it a perpetual licence or a per year thing?
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@jrc said in Xenserver and Storage:
What is the general cost for Starwind's VSAN stuff? Is it a perpetual licence or a per year thing?
They have totally free versions.
