Abhinav Sharma🇮🇳

Engineering (Distributed Systems) #Coder_by_heart #fluent_in_sarcasm #bornCricketer #Jersey_22

[Abhinav Sharma🇮🇳 @absharma_2201]

"Give a man a program, frustrate him for a day. Teach a man to program, frustrate him for a lifetime." - An Engineer #softwareengineering

[Abhinav Sharma🇮🇳 @absharma_2201]

@ItsVinay01 Dark

[Abhinav Sharma🇮🇳 @absharma_2201]

Every production network problem
maps to one of these layers.

If you know the layer,
debugging becomes systematic.

[Abhinav Sharma🇮🇳 @absharma_2201]

How a network packet actually travels
from your application to the wire 🧵

(Not the textbook version)

[Abhinav Sharma🇮🇳 @absharma_2201]

Step 4: Queues & NIC

Packets pass through:
• qdisc
• driver queues
• NIC ring buffers

Only now do bits hit the wire.

[Abhinav Sharma🇮🇳 @absharma_2201]

Most production outages are not caused by bugs.

They’re caused by people not understanding
what actually happens between `send()` and `recv()`.

Today, let’s fix that.

[Abhinav Sharma🇮🇳 @absharma_2201]

@ScholarshipfPhd Hi

[Abhinav Sharma🇮🇳 @absharma_2201]

@hnasr Yes, it's so crucial to understand how MAC , ARP and Route tables work for hop to hop delivery.

[Abhinav Sharma🇮🇳 @absharma_2201]

Khoon ubaal raha hai, har seene mein toofan hai,
Maa ka aanchal laal hai, yeh sirf ek armaan hai —
Na kadi ninda, na khokhle bayan chahiye,
Ab har gham ka sirf inteqaam chahiye!
Janta poochti hai: kab milega jawaab, kab hoga hisaab?
#PahalgamTerroristAttack #pahalgamattack

[Abhinav Sharma🇮🇳 @absharma_2201]

@wangbin579 For people not knowing the database internals , can someone explain the issue

[Abhinav Sharma🇮🇳 @absharma_2201]

Read “How Netflix Accurately Attributes eBPF Flow Logs“ by Netflix Technology Blog on Medium: https://t.co/r1kFULapQb

[Abhinav Sharma🇮🇳 @absharma_2201]

@GoogleCloudTech There should be efforts to create more unified standards for inter-cloud networking .

[Abhinav Sharma🇮🇳 @absharma_2201]

@sunbains @srsarangi Because he is not selling his courses

[Abhinav Sharma🇮🇳 @absharma_2201]

“eBPF“

Read “Noisy Neighbor Detection with eBPF“ by Netflix Technology Blog on Medium: https://t.co/1argaf2roL
#ebpf #CloudNative #engineering

[Abhinav Upadhyay @abhi9u]

I really enjoyed watching this talk on the FreeBSD scheduler by Kirk McKusick. While the Linux scheduler algorithm is well known, very little is out there on the FreeBSD scheduler. This talk fills that gap.

I didn't know but Kirk along with Bill Joy wrote the original BSD multilevel feedback queue scheduler (MLFQ) which is still available in FreeBSD. But, now FreeBSD has switched to a more sophisticated algorithm called the ULE scheduler which is well suited for multicore systems.

Interestingly, in the Q&A, Kirk mentions that while the original 4.4 BSD scheduler (MLFQ) is around 100 lines of C, the new ULE scheduler is 2000 lines, and the Linux CFS is 20k lines of code. I think he cited this based on a Usenix paper which compared the two schedulers.

Link to the talk in reply.

[Abhinav Sharma🇮🇳 @absharma_2201]

@7etsuo This is huge, mercy 🙏