Auto Scaling Group

Use ASG if the EC2 is unable to handle surge of requests.

ASG can be integrated with SQS. Based on the length of the queue, the group of EC2 instances can be increased or decreased.

Comments

How to squash multiple commits into one?

Suppose you have commits as follows: HEAD~0 --> Commit 5 eeeeeee HEAD~1 --> Commit 4 ddddddd HEAD~2 --> Commit 3 ccccccc HEAD~3 --> Commit 2 bbbbbbb HEAD~4 --> Commit 1 aaaaaaa If you want to squash commits 3, 4 and 5 and make them as a single commit, run the commands below: git rebase -i HEAD~3 3 means, you are squashing the last 3 commits. Update text in editor opened, save and close. git push -f Now, the commits would be as follows: HEAD~0 --> Squashed Commit fffffff HEAD~1 --> Commit 2 bbbbbbb HEAD~2 --> Commit 1 aaaaaaa

GoLang - How to check if key exists in map?

package main import "fmt" var m map[string]string func main() { m = make(map[string]string) m["foo"] = "abc" if val, ok := m["foo"]; ok { fmt.Println("foo found -", val) } else { fmt.Println("foo not found") } if val, ok := m["bar"]; ok { fmt.Println("bar found -", val) } else { fmt.Println("bar not found") } } Output: foo found - abc bar not found

How to delete commits in Git?

Suppose you have 3 commits with SHAs as follows: HEAD~0 --> Commit 3 ccccccc HEAD~1 --> Commit 2 bbbbbbb HEAD~2 --> Commit 1 aaaaaaa If you want to remove the last two commits (i.e., commits 2 and 3) and make Commit 1 as the latest commit, run the following commands: git reset --hard aaaaaaa git push origin HEAD --force Now, the commit history would be as follows: HEAD~0 --> Commit 1 aaaaaaa

Ayyappu MK

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