1517280 - Investigate using larger Moonshot disc for WIndows 10 Installs

Status: RESOLVED FIXED

(Infrastructure & Operations :: RelOps: Windows OS, task)

Comment 1

[Mark Cornmesser [:markco]]

jmaher: The test associate with the link below were on moonshot nodes using the larger disk. Could you take a look and see if there is any concern on time or noise, please?

https://treeherder.mozilla.org/#/jobs?repo=try&revision=9db110a9dc357fd9073886ba5d53c4af931beb1b

Comment 2

[Joel Maher ( :jmaher ) (UTC -8)]

I had to look over the data a couple of times, this is really cool. Overall the noise is less and I don't see any downsides. Where did this request/idea come from? Is this something we could experiment with on our unittest vms in aws- maybe excess disk allows for more cache or less aggressive disk cleanup activity/timing.

Comment 3

[Mark Cornmesser [:markco]]

The original idea was Q because we had the larger disc sitting there not being used.

Rob: do you have any thoughts on the question of using a larger disk in aws?

Comment 4

[Rob Thijssen [:grenade (EET/UTC+0300)]]

it's a pretty simple configuration change to make in order to use larger disks in aws/ec2.

on windows 10 we currently use two 120gb disks eg:

• for the os (C): https://github.com/mozilla-releng/OpenCloudConfig/blob/4053e2c/userdata/Manifest/gecko-t-win10-64.json#L1688
• for tasks & caches we split one volume into two partitions (https://github.com/mozilla-releng/OpenCloudConfig/blob/4053e2c/userdata/Manifest/gecko-t-win10-64.json#L1696):
  • cache: Y, 20gb
  • tasks: Z, 100gb

those lines can simply be modified to some other size and after we've triggered a new ami deploy, subsequently instantiated instances will have the new disk sizes. on ec2 it's worth noting that the larger you configure the disk size, the higher the provided iops will be (you get faster read/write operations).

i'm happy to make the necessary changes if someone can let me know what size in gb we're seeing better hardware test results on.

Comment 5

[Mark Cornmesser [:markco]]

This will be wrapped into the work with deployment of Puppet configured images. https://bugzilla.mozilla.org/show_bug.cgi?id=1545844