17:54 < mutante> hi all, I could use some input on determining where we want to draw the line between ganeti VM and hardware. So .. the existing ganeti VMs usually have RAM between 1G and 8G, only 2 special cases with 16GB, puppetdb and deneb. none have more than 16.  Now we have a request to upgrade the webperf VMs from 8G to 16G or 32G if possible. I  looked at "gnt-node list" to try to determine how much is left 
17:54 < mutante> that can be allocated and the MFree column tells me it it is anything from 12 up to 62 depending on the node. So I am not sure how to calculate it but either way it seems  to mean we can't do 2 x 32GB.  So is this the line where we say webperf* should move to metal ?
17:55 < mutante> ..or does it just mean the ganeti cluster needs more resources

17:57 < mutante> dpifke: just a cc: for you ^
18:00 < dpifke> If it wasn't clear from the request, only webperfX002 (one VM in each cluster) needs more RAM.  webperfX001 can stay with 8GB.
18:02 < dpifke> Given the X001 hosts have different function than X002 hosts, perhaps we use this as an excuse to rename them.
18:02 < mutante> ah yes, one per cluster
18:02 < mutante> dpifke: yea, actually.. let's do the renaming
18:02 < dpifke> I *think* arclamp is the only thing running on X002, let me double check.
18:04 < mutante> i guess i can do "8 GB more" and first try it in codfw.  so the docs say it can be done without downtime
...
18:16 < mutante> i had to reboot on ganeti level, not OS level. but that is very quick
18:17 < mutante> [webperf2002:~] $ cat /proc/meminfo 
18:17 < mutante> MemTotal:       16436708 kB
18:17 < mutante> dpifke: there you go, so the downtime was very short
18:17 < dpifke> Looks good on this end, thanks!
......
18:28 < mutante> i will claim it's resolved and if it turns out you need more than 16 then let's reopen it and that discussion from the start
18:29 < mutante> because then they would become special cases among the other VMs
18:30 < dpifke> OK.  The long-term plan is to have this run as a stateless service of some sort rather than in a VM.  So hopefully 16GB will hold us over until then.
18:31 < mutante> alright. sounds good