最高の Hussein Nasser ポッドキャスト (2024)

1
This new Linux patch can speed up Reading Requests 18:12

6d ago18:12

18:12

Fundamentals of Operating Systems Course https://oscourse.winVery clever! We often call read/rcv system call to read requests from a connection, this copies data from kernel receive buffer to user space which has a cost. This new patch changes this to allow zero copy with notification. “Reading' data out of a socket instead becomes a “notification”…

1
Cloudflare's 150ms global cache purge | Deep Dive 1:02:21

13d ago1:02:21

1:02:21

Cloudflare built a global cache purge system that runs under 150 ms. This is how they did it. Using RockDB to maintain local CDN cache, and a peer-to-peer data center distributed system and clever engineering, they went from 1.5 second purge, down to 150 ms. However, this isn’t full picture, because that 150 ms is just actually the P50. In this vid…

1
MySQL is having a bumpy journey 28:34

1M ago28:34

28:34

Fundamentals of Database Engineering udemy course https://databases.winMySQL has been having bumpy journey since 2018 with the release of the version 8.0. Critical crashes that made to the final product, significant performance regressions, and tons of stability and bugs issues. In this video I explore what happened to MySql, are these issues getti…

1
How many kernel calls in NodeJS vs Bun vs Python vs native C 20:41

1M ago20:41

20:41

Fundamentals of Operating Systems Course https://oscourse.winIn this video I use strace a performance tool that measures how many system calls does a process makes. We compare a simple task of reading from a file, and we run the program in different runtimes, namely nodejs, buns , python and native C. We discuss the cost of kernel mode switches, sy…

1
When do you use threads? 31:08

2M ago31:08

31:08

Fundamentals of Operating Systems Course https://os.husseinnasser.comWhen do you use threads?I would say in scenarios where the task is either 1) IO blocking task2) CPU heavy3) Large volume of small tasksIn any of the cases above, it is favorable to offload the task to a thread.1) IO blocking taskWhen you read from or write to disk, depending on ho…

1
Frontend and Backends Timeouts 25:23

2M ago25:23

25:23

I am fascinated by how timeouts affect backend and frontend programming. When a party is waiting on something you can place a timeout to break the wait. This is useful for freeing resources to more critical processes, detecting slow operations and even avoiding DOS attacks. Contrary to common beliefs, timeouts are not exclusive to request processin…

1
Postgres is combining IO in version 17 27:39

2M ago27:39

27:39

Learn more about database and OS internals, check out my courses Fundamentals of database engineering https://databases.win Fundamentals of operating systems https://oscourse.win This new PostgreSQL 17 feature is game changer. You see, postgres like most databases work with fixed size pages. Pretty much everything is in this format, indexes, table …

1
Windows vs Linux Kernel 37:23

2M ago37:23

37:23

Fundamentals of Operating Systems Course https://os.husseinnasser.comWhy Windows Kernel connects slower than Linux I explore the behavior of TCP/IP stack in Windows kernel when it receives a RST from the backend server especially when the host is available but the port we are trying to connect to is not. This behavior is exacerbated by having both …

1
Running out of TCP ephemeral source ports 20:06

2M ago20:06

20:06

In this episode of the backend engineering show I describe an interesting bug I ran into where the web server ran out of ephemeral ports causing the system to halt. 0:00 Intro 0:30 System architecture 2:20 The behavior of the bug 4:00 Backend Troubleshooting 7:00 The cause 15:30 Ephemeral ports on loopback…

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io uring gets even faster 16:35

5M ago16:35

16:35

Fundamentals of Operating Systems Course https://os.husseinnasser.comLinux I/O expert and subsystem maintainer Jens Axboe has submitted all of the IO_uring feature updates ahead of the imminent Linux 6.10 merge window.In this video I explore this with a focus on what zerocopy. 0:00 Intro0:30 IO_uring gets faster 2:00 What is io_uring7:00 How Normal…

1
They made Python faster with this compiler option 29:04

6M ago29:04

29:04

Fundamentals of Operating Systems Course https://oscourse.winLooks like fedora is compiling cpython with the -o3 flag, which does aggressive function inlining among other optimizations.This seems to improve python benchmarks performance by at most 1.16x at a cost of an extra 3MB in binary size (text segment). Although it does seem to slow down some…

1
How Apache Kafka got faster by switching ext4 to XFS 33:52

6M ago33:52

33:52

https://oscourse.win Allegro improved their Kafka produce tail latency by over 80% when they switched from ext4 to xfs. What I enjoyed most about this article is the detailed analysis and tweaking the team made to ext4 before considering switching to xfs. This is a classic case of how a good tech blog looks like in my opinion. 0:00 Intro 0:30 Summa…

1
Google Patches Linux kernel with 40% TCP performance 14:24

8M ago14:24

14:24

Get my backend course https://backend.win Google submitted a patch to Linux Kernel 6.8 to improve TCP performance by 40%, this is done via rearranging the tcp structures for better cpu cache lines, I explore this here.0:00 Intro0:30 Google improves Linux Kernel TCP by 40%1:40 How CPU Cache Line Works6:45 Reviewing the Google Patchhttps://www.phoron…

1
Database Torn pages 15:33

8M ago15:33

15:33

0:00 Intro 2:00 File System Block vs Database Pages 4:00 Torn pages or partial page 7:40 How Oracle Solves torn pages 8:40 MySQL InnoDB Doublewrite buffer 10:45 Postgres Full page writes

1
Cloudflare Open sources Pingora (NGINX replacement) 31:05

8M ago31:05

31:05

Get my backend course https://backend.win Cloudflare has announced they are opening sources Pingora as a networking framework! Big news, let us discuss 0:00 Intro 0:30 Reasons why Cloudflare built Pingora? 3:00 It is a framework! 7:30 What in Pingora? 11:50 Security in Pingora 13:45 Multi-threading in Pingora 21:00 Customization vs Configuration 25…

1
The Internals of MongoDB 44:57

8M ago44:57

44:57

https://backend.win https://databases.win I’m a big believer that database systems share similar core fundamentals at their storage layer and understanding them allows one to compare different DBMS objectively. For example, How documents are stored in MongoDB is no different from how MySQL or PostgreSQL store rows. Everything goes to pages of fixed…

1
The Beauty of Programming Languages 18:17

9M ago18:17

18:17

In this video I explore the type of languages, compiled, garbage collected, interpreted, JIT and more.

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The Danger of Defaults - A PostgreSQL Story 11:34

9M ago11:34

11:34

I talk about default values and how PostgreSQL 14 got slower when a default parameter has changed. Mike's bloghttps://smalldatum.blogspot.com/2024/02/it-wasnt-performance-regression-in.html

1
Database Background writing 9:08

9M ago9:08

9:08

Background writing is a process that writes dirty pages in shared buffer to the disk (well goes to the OS file cache then get flushed to disk by the OS) I go into this process in this video

1
The Cost of Memory Fragmentation 39:07

9M ago39:07

39:07

Fragmentation is a very interesting topic to me, especially when it comes to memory. While virtually memory does solve external fragmentation (you can still allocate logically contiguous memory in non-contiguous physical memory) it does however introduce performance delays as we jump all over the physical memory to read what appears to us for examp…

1
The Real Hidden Cost of a Request 13:08

11M ago13:08

13:08

In this video I explore the hidden costs of sending a request from the frontend to the backend Heard https://medium.com/@hnasr/the-journey-of-a-request-to-the-backend-c3de704de223

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Episode 35: Tolerable Risk E035 - Rupert Evill - Ethics, Integrity, Culture, and Risk 55:07

11M ago55:07

55:07

Join Sabrina as she speaks with Rupert Evill, author of Bootstrapping Ethics, and they discuss ethics, integrity, culture, and risk in the third sector. Links for this episode: https://linktr.ee/ethics_insight

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Episode 34: Tolerable Risk E034 - Nir Kossovsky - Reputational Risk Management 44:53

12M ago44:53

44:53

Join Sabrina as she speaks with Nir Kossovsky, CEO of Steel City RE and reputational risk management expert, as they discuss reputational risk management approaches for the third sector. Relevant links: Time Stamp, Topic, URL 08:30 Prediction: Resilience Monitor https://steelcityre.com/predict-reputation-risk/ 10:11 2022 Νobel Prize in Economics – …

1
Episode 33: Tolerable Risk - E033 - Lori Stanley - strategy development and risk 44:22

12M ago44:22

44:22

Join Sabrina as she speaks with Lori Stanley, founder of Lori Stanley Consulting and strategy development expert, as they discuss the threats and opportunities third-sector organizations face when developing strategic plans.

1
Why create Index blocks writes 13:02

1y ago13:02

13:02

Fundamentals of Database Engineering udemy course (link redirects to udemy with coupon)https://database.husseinnasser.com Why create Index blocks writesIn this video I explore how create index, why does it block writes and how create index concurrently work and allow writes.0:00 Intro1:28 How Create Index works4:45 Create Index blocking Writes5:00 …

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Episode 32: Tolerable Risk - E032 - Rachel Erskine - Ethical storytelling and fundraising 44:41

1y ago44:41

44:41

Join Sabrina as she speaks with Rachel Erskine, an ethical storytelling advisor and co-chair of the BOND People in the Pictures Working group, and they discuss the importance of ethical storytelling and fundraising in the third-sector. Resources for this episode: Practical guidance The Dignified Storytelling project (2022) Guidelines for ethical co…

1
Episode 31: Tolerable Risk - E31 - Dr. Warren Black - Complex systems thinking and risk 49:43

1y ago49:43

49:43

Join Sabrina as she speaks with Dr. Warren Black, a complex systems and risk expert, and they discuss how complexity, systems thinking, and risk impact the third sector. You can find the complexity matrix we discuss on the episode here. You can find Dr. Black's YouTube channel here - https://youtube.com/@warrenblack4700?si=of8i9HsBmWRhTTHr…

1
The Problems of an HTTP/3 Backend 13:52

1y ago13:52

13:52

HTTP/3 is getting popular in the cloud scene but before you migrate to HTTP/3 consider its cost. I explore it here.0:00 Intro HTTP/3 is getting popular3:40 HTTP/1.1 Cost5:18 HTTP/2 Cost6:30 HTTP/3 Costhttps://blog.apnic.net/2023/09/25/why-http-3-is-eating-the-world/

1
Encrypted Client Hello - The Pros & Cons 33:17

1y ago33:17

33:17

The Encrypted Client Hello or ECH is a new RFC that encrypts the TLS client hello to hide sensitive information like the SNI. In this video I go through pros and cons of this new rfc.0:00 Intro2:00 SNI4:00 Client Hello8:40 Encrypted Client Hello11:30 Inner Client Hello Encryption18:00 Client-Facing Outer SNI21:20 Decrypting Inner Client Hello23:30 …

1
Episode 30: Tolerable Risk - E030 - Isabel de Bruin Cardoso - unethical behavior and the "halo-effect" 43:43

1y ago43:43

43:43

Join Sabrina as she speaks with Isabel de Bruin Cardoso - a third-sector ethics and safeguarding expert - and they discuss the risks of unethical behavior and the "halo-effect" in the third-sector. References for this episode: Contact details: debruin@rsm.nl More info: NGO Soul & Strategy podcast Principia Advisory Website Articles: The NGO Halo Ef…

1
Episode 29: Tolerable Risk - E029 - Hussein Nasser-Eddin - physical and personal security and risk 51:43

1y ago51:43

51:43

Join Sabrina as she speaks with Hussein Nasser-Eddin, CEO of Crownox Security, and they discuss physical and personal security and risk in the third-sector.

1
Episode 28: Tolerable Risk - E028 - Kate Roberts - Moral Injury, Psychosocial Hazards, and Risk 38:28

1y ago38:28

38:28

Join Sabrina as she speaks with Kate Roberts, a third-sector Staff Care and Wellbeing Specialist, and they discuss moral injury, psychosocial hazards, and risk in the third-sector.

1
Episode 27: Tolerable Risk - E 027 - Claris D'cruz - Governance, Strategy, and Risk 1:04:25

1y ago1:04:25

1:04:25

Join Sabrina as she speaks with Claris D'cruz, a third-sector governance expert, and they discuss strategy, governance, and risk in the third sector. Relevant links for this episode: https://www.gov.uk/government/5-minute-guides-for-charity-trustees https://www.gettingonboard.org/ https://www.eventbrite.co.uk/cc/trustee-learning-programme-getting-o…

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Episode 26: Tolerable Risk - E026 - Edson Marinho - Project Management and Risk 51:51

1y ago51:51

51:51

Join Sabrina as she speaks with Edson Marinho, Executive Director of PM4NGOs, and they discuss project management and risk management in the third sector. Relevant links for the episode: https://pm4ngos.org/

1
The Journey of a Request to the Backend 52:58

1y ago52:58

52:58

From the frontend through the kernel to the backend process When we send a request to a backend most of us focus on the processing aspect of the request which is really just the last step. There is so much more happening before a request is ready to be processed, most of this step happens in the Kernel. I break this into 6 steps, each step can theo…

1
Episode 25: Tolerable Risk - E025 - Tim Leech - Board Purpose and Risk 40:11

1+ y ago40:11

40:11

Join Sabrina as she speaks with Tim Leech, Managing Director of Risk Oversight Solutions, and they discuss the importance of having a clear Board purpose and how it helps organizations better achieve their objectives and manage risk.

1
They Enabled Postgres Partitioning and their Backend fell apart 33:38

1+ y ago33:38

33:38

In a wonderful blog, Kyle explores the pains he faced managing a Postgres instance for a startup he works for and how enabling partitioning sigintfically created wait events causing the backend and subsequently NGINX to through 500 errors.We discuss this in this video/podcasthttps://www.kylehailey.com/post/postgres-partition-pains-lockmanager-waits…

1
Episode 24: Tolerable Risk E024 - Paul Ronalds - impact investing 41:02

1+ y ago41:02

41:02

Join Sabrina as she speaks with Paul Ronalds, Founder and CEO of Save the Children Global Ventures, as they discuss impact investing, innovative financing, and risk in the third sector.

1
Episode 23: Tolerable Risk E023 - Alexandra Hoffman - Crisis, resilience, and risk 31:55

1+ y ago31:55

31:55

Join Sabrina as she speaks with Alexandra Hoffman, CEO of Crisis Ally, and they discuss crisis, resilience, and risk in the third sector.

1
WebTransport - A Backend Game Changer 15:01

1+ y ago15:01

15:01

WebTransport is a cutting-edge protocol framework designed to support multiplexed and secure transport over HTTP/2 and HTTP/3. It brings together the best of web and transport technologies, providing an all-in-one solution for real-time, bidirectional communication on the web. Watch full episode (subscribers only) https://spotifyanchor-web.app.link…

1
Episode 22: Tolerable Risk E022 - Elyse Wallnutt - Data Protection in Fundraising and Marketing 38:34

1+ y ago38:34

38:34

Join Sabrina as she speaks with Elyse Wallnutt, Founder - Agility Lab Consulting, and they discuss the impact data protection has specifically on the marketing and fundraising efforts of third-sector organizations. Books referenced: The Fight for Privacy by Danielle Kats Citron Algorithms of Oppression by Safiya Umoja Noble LinkedIn: www.linkedin.c…

1
Your SSD lies but that's ok | Postgres fsync 30:04

1+ y ago30:04

30:04

fsync is a linux system call that flushes all pages and metadata for a given file to the disk. It is indeed an expensive operation but required for durability especially for database systems. Regular writes that make it to the disk controller are often placed in the SSD local cache to accumulate more writes before getting flushed to the NAND cells.…

1
The problem with software engineering 17:39

1+ y ago17:39

17:39

ego is the main problem to a defective software product. the ego of the engineer or the tech lead seeps into the quality of the product. Fundamentals of Backend Engineering Design patterns udemy course (link redirects to udemy with coupon)https://backend.husseinnasser.com

1
Episode 21: Tolerable Risk E021 - Andy Kovacs - Improving Audit Communications 56:24

1+ y ago56:24

56:24

Join Sabrina as she speaks with Andy Kovacs, The Audit and Leadership Communications Guy!, and they discuss the myriad of ways you can improve your audit communications.

1
2x Faster Reads and Writes with this MongoDB feature | Clustered Collections 27:01

1+ y ago27:01

27:01

Fundamentals of Database Engineering udemy course (link redirects to udemy with coupon)https://database.husseinnasser.com In version 5.3, MongoDB introduced a feature called clustered collection which stores documents in the _id index as oppose to the hidden wiredTiger hidden index. This eliminates an entire b+tree seek for reads using the _id inde…

1
Episode 20: Tolerable Risk E020 - Veesh Sharma - Internal Audit and Risk in nonprofit organizations 39:40

1+ y ago39:40

39:40

Join Sabrina as she speaks with Veesh Sharma, Chief Assurance Officer / Interim Chief Risk Officer, of Save the Children International, as they talk about internal audit and risk in nonprofit organizations.

1
Prime Video Swaps Microservices for Monolith: 90% Cost Reduction 35:58

1+ y ago35:58

35:58

Prime video engineering team has posted a blog detailing how they moved their live stream monitoring service from microservices to a monolith reducing their cost by 90%, let us discuss this0:00 Intro2:00 Overview10:35 Distributed System Overhead21:30 From Microservices to Monolith 29:00 Scaling the Monolith32:30 Takeawayshttps://www.primevideotech.…

1
Episode 19: Tolerable Risk E019 - Veronica La Femina - Strategy Execution 51:52

1+ y ago51:52

51:52

Join Sabrina as she speaks with Veronica LaFemina, Founder and CEO of LaFamina & Co., and they discuss strategy execution and the threats and opportunities that are associated with this in the third sector. References for this episode My LinkedIn: https://www.linkedin.com/in/vlafemina LaFemina & Co. website: lafemina.co LaFemina & Co. Blog Post -- …

1
A Deep Dive in How Slow SELECT * is 39:23

1+ y ago39:23

39:23

Fundamentals of Database Engineering udemy course (link redirects to udemy with coupon)https://database.husseinnasser.comIn a row-store database engine, rows are stored in units called pages. Each page has a fixed header and contains multiple rows, with each row having a record header followed by its respective columns. When the database fetches a …

1
Episode 18: Tolerable Risk E018 - Niki Wood - Risk and Monitoring, Evaluation, and Learning 44:57

1+ y ago44:57

44:57

Join Sabrina as she speaks with Niki Wood, an international development MEL expert, and they discuss how monitoring, evaluation, and learning, and risk have more in common then you might think. References and citations for this episode are: Rogers, P. J. (2008). Using Programme Theory to Evaluate Complicated and Complex Aspects of Interventions. Ev…

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ポッドキャスト Hussein Nasser

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