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Nemo f487703cf3 commit 2019-04-22 16:45:43 +05:30
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---
---
# <!--fit--> Tech 2019
_- nemo_
---
# <!-- fit -->2-feet-rule
---
# Caveats 🤷‍
- Non-Exhaustive
- Aligned to Razorpay
---
# For every Tech
1. What is it?
2. Why should you care?
3. What can we use it for?
---
![bg vertical](https://fakeimg.pl/1920x400/40407a/fff/?text=serverless)
![bg](https://fakeimg.pl/1920x400/ff793f/fff/?text=blockchain)
![bg](https://fakeimg.pl/1920x400/2c2c54/fff/?text=kubernetes)
![bg](https://fakeimg.pl/1920x400/b33939/fff/?text=microservices)
![bg](https://fakeimg.pl/1920x400/ff5252/fff/?text=service+mesh)
![bg](https://fakeimg.pl/1920x400/227093/fff/?text=events+vs+metrics+vs+tracing)
<!-- ![bg](https://fakeimg.pl/1920x400/cd6133/fff/?text=chaos+engineering) -->
<!-- ![bg](https://fakeimg.pl/1920x400/84817a/fff/?text=react) -->
---
# serverless
## What is it?
If your application isn't called frequently enough, your computing resources can be brought up Just In Time.
---
## Why should you care?
- Code runs instantly
- You pay for what you run
- Scaling is easier
---
## Sample Usecases
- Any kind of Batch Jobs that take <15 minutes
- A rarely visited website
- If-this-then-that (Infrequent Trigger based Actions)
- When a user uploads a file ->
- When a user sends an email ->
---
## Limitations
- Vendor-Lockins
- Not all Languages
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# blockchain
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# what is it?
Techno-Libertarians's dream of removing central authorities from the world's economy, to only end up crashing it entirely.
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# what is it?
blockchain is a verifiable distributed database that doesn't require trusted parties
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![bg](https://fakeimg.pl/1440x900/ff793f/fff/?text=verifiable)
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![bg](https://fakeimg.pl/1440x900/218c74/fff/?text=distributed)
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![bg](https://fakeimg.pl/1440x900/474787/fff/?text=database)
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![bg](https://fakeimg.pl/1440x900/227093/fff/?text=trustless)
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# why should you care?
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# really, should I care?
If you trust developers to write code that isn't buggy, and software developers to regulate finance better than the government does - Maybe?
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![bg](https://fakeimg.pl/1440x900/706fd3/fff/?text=kubernetes)
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# the google hype cycle
- Map Reduce -> Apache Hadoop
- BigTable -> Apache HBase
- Chubby -> Apache Zookeeper
- Spanner -> Cockroach DB
- Borg -> kubernetes
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# Borg
![](images/borg.png)
---
# What is it?
Large scale cluster management tool to help you run thousands of applications
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# why should you care?
- we run kubernetes and all of our services run on kubernetes
- kubernetes is commoditization of the cloud (GCP/AWS :fist_raised:)
- k8s advantage :tm:
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# <!--fit-->logs v/s metrics v/s tracing
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# logs
- easiest
- most verbose
- no bird eye view
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# metrics
- most important
- dimensions/cardinality of a metric
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# what metrics
![](images/red.jpg)
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# USE
> For every resource, check utilization, saturation, and errors.
- utilization: the average time that the resource was busy servicing work [2]
- saturation: the degree to which the resource has extra work which it can't service, often queued
- errors: the count of error events
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# tracing
- hardest
- needs to be done well
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![bg](https://fakeimg.pl/1440x900/ff793f/fff/?text=microservices)
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# <!-- fit --> microservices
![](images/uber.jpg)
---
# microservices
aka: How to Trade Development complexity for Operational complexity