< luke-jr>
provoostenator: is that based on EC2 measurements? if so, it's just noise to me
< provoostenator>
It is. I (or someone else) can try to reproduce on a physical machine. I think it's too consistent to be jus noise though.
< provoostenator>
These machines were running for almost a week; you'd expect other tenants to come and go.
< luke-jr>
provoostenator: I suggest a raspi ;)
< provoostenator>
The cache usage of course is deterministic.
< luke-jr>
but you may have a point there
< provoostenator>
I actually ordered 2x Orange Pi Plus 2E and 1x Nanopi Neo Plus 2...
< provoostenator>
2 GB and 1 GB RAM respectively. Afaik both slightly better than the lastest Rasperry Pi, and not much more expensive.
< ZiNC>
Does the prune size affect the behavior?
< provoostenator>
Regarding EC2, just for comparison, the i3.2xlarge, which has a large enough SSD drive to avoid pruning and enough memory to max dbcache, just did a full IBD in 4 hours.
< provoostenator>
A similar machine, but with pruning (on master), took about twice as long, but I haven't done an exact comparison.
< provoostenator>
So for a project I'm working on, I just spin up a big machine, do the IBD, manually prune at the end and then downgrade.
< provoostenator>
That costs about $4
< provoostenator>
luke-jr: without more data I'd prefer to merge your variant to be on the safe side
< luke-jr>
can always improve later
< provoostenator>
Yeah, it might be worth trying more aggressive prunes again once we find a way to keep more of the cache in memory.
< jhfrontz>
I'm trying to do a Gitian build of Bitcoin Core on a stock (just installed from a liveUSB) Ubuntu 18.04 distro using the instructions at https://github.com/bitcoin-core/docs/blob/master/gitian-building.md#initial-gitian-setup . I keep running into situations where gitian-build.sh (or one of the scripts it calls) need to do some sort of interactive edits (e.g.., asking for confirmation on a package installation/customization
< jhfrontz>
nd the script inevitably fails.
< jhfrontz>
I'm assuming I'm missing some bootstrapping (that isn't otherwise handled by the build script). But maybe it's not even supposed to work on Ubuntu?
< sipa>
it's certainly supposed to work on ubuntu
< sipa>
but ubuntu 18.04 is pretty recent; maybe people haven't gone through it
< jhfrontz>
Hmm, ok. Is there a better/stabler Ubuntu version that stands a higher probability of succeeding?
< jhfrontz>
17.10 says it's from Oct 2017.
< sipa>
yes, the version numbers are YY.MM :)
< jhfrontz>
hah, ok, tnx
< sipa>
travis uses trusty (14.04)
< jhfrontz>
ok, I'll try that; thanks!
< ken2812221>
jhfrontz: If you are using lxc 3.0, you'll need to apply PR#178 of gitian-builder.