6

When I create a boot disk with gCloud less than 200GB in size, I see this error:

WARNING: You have selected a disk size of under [200GB]. This may result in poor I/O performance. For more information, see: https://developers.google.com/compute/docs/disks/persistent-disks#pdperformance.

I don't, however, see the details about this 200GB size which it alludes to being at somewhere on the page at that url.

Should I care about this warning at all? I wonder is it is more of a ploy for them to make more money trying to encourage you to lease more space?

Note: I'm using a standard disk, not a solid state. My disk access performance which is of any concern is via MySQL with very small read / writes 99% of the time, and occasionally blobs in the range of say 1 to 100 MBs.

Valentin
  • 917
  • 14
  • 19
BuvinJ
  • 10,221
  • 5
  • 83
  • 96

1 Answers1

5

It looks like the documentation has shifted around a little, and the warning is out of date.

There is a section of the Block Storage page that explains the relationship between persistent disk size and performance.

We'll fix the URL in gcloud.

Zachary Newman
  • 20,014
  • 4
  • 39
  • 37
  • Thanks for the response, Zachary. Could you help to understand some of what that says? Based on my described use, should I be concerned about the size to performance relationship? – BuvinJ Feb 29 '16 at 19:10
  • I would say that the only way to know for your use case is to benchmark–if you reach a point where disk access is a bottleneck, select a larger disk and see if that helps. – Zachary Newman Mar 01 '16 at 16:57
  • Ok. Thanks for the help. – BuvinJ Mar 01 '16 at 17:49
  • Looks like this message is still around in the gcloud CLI - my version is 158.0.0 – talonx Jun 14 '17 at 13:13
  • I see the new URL in the current version of the CLI–note the difference between `/docs/disks` (new URL) and `/docs/disks/persistent-disks` (old URL). Looks like the anchor has shifted to just `#performance`, though. – Zachary Newman Jun 14 '17 at 18:09