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Old 2022-02-15, 01:00   #12
chalsall
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"Chris Halsall"
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Quote:
Originally Posted by bur View Post
Ok, thanks. I still don't really understand the whole spot-instance scenario. While it's running, can I just access it via SSH same as a normal VPS? So it would just be like a VPS that gets shut down every now and then and after a while automatically reboots?
Close to correct... But it's a little complicated...

Think of an AWS Spot instance is simply a VPS that is based on some sort of an auction. You signal to AWS how much you're willing to pay for it, and they'll provide the VPS for as long as your "bid" makes economic sense to them.

While that AWS Spot is running, it is just like any other AWS Instance (as in, you can SSH into it, etc). Except, it's much less expensive. And, by definition, it /may/ be shut down at any time. Dead Instance Computing...

Importantly... Once a Spot terminates, it's done. It does not automatically reboot (by default).

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So everytime a termination notice is sent I need a script to run that tidies everything up?
More advanced users of AWS work with that notification option.

But most working with inexpensively interrupted work simply have the code write check-point files regularly, and let the VPS fall out from beneath them without notice. The last state is captured (with a few minutes of work lost) in the persistent storage which is not deleted at termination.

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And integrating S3 storage seems not too easy...
PLEASE don't get distracted by other AWS offerings like S3. AWS has many offerings that glitter...

For anyone starting out in the "Cloud", my best advice is to simply get mprime running, and then scale up from there.

Again... Please reach out if you have any questions on this. It is a very interesting subject domain to me.
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Old 2022-02-15, 21:45   #13
chalsall
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I really do encourage people to experiment with Cloud computing. It's a bit of a learning curve, but the slope is far from vertical.

It's also a great deal of fun! And the GIMPS et al projects can benefit from the learning (and the empirical testing).

Also, don't assume that AWS is the only option. I have found that Google Cloud is also very good, for example. And their introductory free trial is an excellent way to get familiar with their platform -- you actually get access to a large amount of the available services (GPUs out).

You /do/ have to give your credit card and phone number details to GCE to get access to this. But I have done this personally, and have had no issues with incorrect billing.

As mentioned elsewhere here, I did *not* have a good experience with Oracle. While their VPS' were great, their billing systems and customer-facing interfaces were not even wrong.
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Old 2022-06-21, 07:09   #14
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Sorry for never getting back previously, but now I'm back. :)

For now I just went with a dedicated server because there are some inexpensive offers: a 12-core i9-10920X for 78€/month or a 16-core Ryzen 5950X for 99€. Would a spot-instance even be cheaper on a "per performance" basis? I find it hard to compare Xeons to consumer CPUs, but it seems you get more computing power with that dedicated server.

I was a bit sceptical whether those cheaper hosters would like the high demand. I contacted Hetzner's and Active Server's support before ordering and they said it's fine, I just might experience that the CPUs decrease clock speed when overheating. Didn't happen so far.

Comparing the two, Hetzner seems more professional, but Active Servers was also very fast with reacting and offers 24/7 KVM access. With Hetzner you have to book KVM and get assigned a time-slot. They have 30 days cancelling period, so you're not as flexible as with spot instances.

Last fiddled with by bur on 2022-06-21 at 07:17
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Old 2022-06-21, 22:51   #15
chalsall
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Quote:
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Sorry for never getting back previously, but now I'm back. :)
Thanks for that. It means a lot.

I'm still currently arguing with Oracle.

Oracle keeps telling me I owe them money. I keep telling them to fsck off.
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Old 2022-06-21, 23:07   #16
chalsall
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Oracle keeps telling me I owe them money. I keep telling them to fsck off.
Sorry, everyone. But this statement is true.

I don't bring lawyers to bear lightly. But I know how to use them.
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