the big bang theory -- yeah , its time to close

the big bang theory -- yeah , its time to close

lost sound again on my test HP elitebook

lost sound again on my test HP elitebook

I kind of know when this happens , I got chrome having youtube open, and I did a shutdown last nite

this time, disable sound device, re-enable it,  didnt do the trick, only got one sound control working

decided to shutdown again, but the NB didn't to shutdown after some while

forcibly turn it off, then turn it on again,

the sound is back\

thought: it could be some chrome caching disrupted the sound when it got a abnormal shut-off

azure availability zone

Regions that support Availability Zones include Central US, North Europe, and SouthEast Asia.

- MS

Azure SLA -- what does it mean by 99.9% ? how many hours down time per year ? ----- its about 9 hours

-- Source MS docs

SLA %	Downtime per week	Downtime per month	Downtime per year
99	1.68 hours	7.2 hours	3.65 days
99.9	10.1 minutes	43.2 minutes	8.76 hours
99.95	5 minutes	21.6 minutes	4.38 hours
99.99	1.01 minutes	4.32 minutes	52.56 minutes
99.999	6 seconds	25.9 seconds	5.26 minutes

tips from Microsoft learn - scale up , scale out, scaling down , or scale in

The cloud is elastic. You can scale down or scale in your deployment if you needed to scale up or scale out only temporarily. Scaling down or scaling in can help you save money.

Azure Advisor and Azure Cost Management are two services that help you optimize cloud spend. You can use these services to identify where you're using more than you need, and then scale back to the capacity you're actually using.

- source MS docs