1027390 - switch tst* EBS from magnetic to SSD

Status: RESOLVED FIXED

(Release Engineering :: General, defect)

Description

[(dormant account)]

We are paying more for IOPS on slow magnetic storage than the price diff. Should save us about 30% on ssd bill for these nodes(while being faster).

We seem to break even(at a slight loss) on builders. Can switch to ssd ebs there as we figure out how to further reduce iops and then switch back.

Comment 1

[(dormant account)]

note even on testers with can experiment with writeout values and possibly switch back to magnetic(though instance storage seems to make more sense as a long term solution)

Comment 2

[Rail Aliiev [:rail]]

I made a snapshot for /dev/sda1 on tst-linux64-ec2-001, created a gp2 type volume in the same AZ, detached the old one and attached the new one to tst-linux64-ec2-001.

Let's see how it behaves at: https://secure.pub.build.mozilla.org/builddata/reports/slave_health/slave.html?name=tst-linux64-ec2-001

I also changed moz-state tag to not-ready to avoid automatic shutdowns.

Comment 3

[Rail Aliiev [:rail]]

So far it took 2 jobs, both worked fine.

I'm going to work it over the weekend.

I don't want to switch to SSD today for all instances since I won't be near computer on the weekend. :)

Comment 4

[Rail Aliiev [:rail]]

http://hg.mozilla.org/build/cloud-tools/rev/ac4154a9d7d6

Soon all of tst spot instances will be using gp2 volume type.

Comment 5

[Rail Aliiev [:rail]]

No issues with these today, closing.