Oren Eini

CEO of RavenDB

a NoSQL Open Source Document Database

Get in touch with me:

oren@ravendb.net +972 52-548-6969

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Comments: 51,071
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33posts

re

  1. (27 May 2024)

    Secure Drop protocol (about one day from now)

  2. (16 Aug 2022)

    How Discord supercharges network disks for extreme low latency

  3. (02 Jun 2022)

    BonsaiDb performance update

  4. (14 Jan 2022)

    Are You Sure You Want to Use MMAP in Your Database Management System?

  5. (09 Dec 2021)

    Why IndexedDB is slow and what to use instead

  6. (23 Jun 2021)

    The performance regression odyssey

  7. (27 Oct 2020)

    Investigating query performance issue in RavenDB

  8. (27 Dec 2019)

    Writing a very fast cache service with millions of entries

  9. (26 Dec 2019)

    Why databases use ordered indexes but programming uses hash tables

  10. (12 Nov 2019)

    Document-Level Optimistic Concurrency in MongoDB

  11. (25 Oct 2019)

    RavenDB. Two years of pain and joy

  12. (19 Aug 2019)

    The Order of the JSON, AKA–irresponsible assumptions and blind spots

  13. (10 Oct 2017)

    Entity Framework Core performance tuning–Part III

  14. (09 Oct 2017)

    Different I/O Access Methods for Linux

  15. (06 Oct 2017)

    Entity Framework Core performance tuning–Part II

  16. (04 Oct 2017)

    Entity Framework Core performance tuning–part I

  17. (26 Apr 2017)

    Writing a Time Series Database from Scratch

  18. (28 Jul 2016)

    Why Uber Engineering Switched from Postgres to MySQL

  19. (15 Jun 2016)

    Why you can't be a good .NET developer

  20. (12 Nov 2013)

    Why You Should Never Use MongoDB

  21. (21 Aug 2013)

    How memory mapped files, filesystems and cloud storage works

  22. (15 Apr 2012)

    Kiip’s MongoDB’s experience

  23. (18 Oct 2010)

    Diverse.NET

  24. (10 Apr 2010)

    NoSQL, meh

  25. (30 Sep 2009)

    Are you smart enough to do without TDD

  26. (17 Aug 2008)

    MVC Storefront Part 19

  27. (24 Mar 2008)

    How to create fully encapsulated Domain Models

  28. (21 Feb 2008)

    Versioning Issues With Abstract Base Classes and Interfaces

  29. (18 Aug 2007)

    Saving to Blob

  30. (27 Jul 2007)

    SSIS - 15 Faults Rebuttal

  31. (29 May 2007)

    The OR/M Smackdown

  32. (06 Mar 2007)

    IoC and Average Programmers

  33. (19 Sep 2005)

    DLinq Mapping

13posts

Recording

  1. (05 Mar 2024)

    Technology & Friends - Oren Eini on the Corax Search Engine

  2. (15 Jan 2024)

    S06E09 - From Code Generation to Revolutionary RavenDB

  3. (02 Jan 2024)

    .NET Rocks Data Sharding with Oren Eini

  4. (01 Jan 2024)

    .NET Core podcast on RavenDB, performance and .NET

  5. (28 Aug 2023)

    RavenDB and High Performance with Oren Eini

  6. (17 Feb 2023)

    RavenDB Usage Patterns

  7. (12 Dec 2022)

    Software architecture with Oren Eini

  8. (17 Nov 2022)

    RavenDB in a Distributed Cloud Environment

  9. (25 Jul 2022)

    Build your own database at Cloud Lunch & Learn

  10. (15 Jul 2022)

    Non relational data modeling & Database engine internals

  11. (11 Apr 2022)

    Clean Architecture with RavenDB

  12. (14 Mar 2022)

    Database Security in a Hostile World

  13. (02 Mar 2022)

    RavenDB–a really boring database

2posts

Meta Blog

  1. (23 Jan 2024)

    I'm a JS Developer now

  2. (17 Jan 2024)

    Blogging ergonomics in 2024

51posts

Production Postmortem

  1. (12 Dec 2023)

    The Spawn of Denial of Service

  2. (24 Jul 2023)

    The dog ate my request

  3. (03 Jul 2023)

    ENOMEM when trying to free memory

  4. (27 Jan 2023)

    The server ate all my memory

  5. (23 Jan 2023)

    The big server that couldn’t handle the load

  6. (16 Jan 2023)

    The heisenbug server

  7. (03 Oct 2022)

    Do you trust this server?

  8. (15 Sep 2022)

    The missed indexing reference

  9. (05 Aug 2022)

    The allocating query

  10. (22 Jul 2022)

    Efficiency all the way to Out of Memory error

  11. (18 Jul 2022)

    Broken networks and compressed streams

  12. (13 Jul 2022)

    Your math is wrong, recursion doesn’t work this way

  13. (12 Jul 2022)

    The data corruption in the node.js stack

  14. (11 Jul 2022)

    Out of memory on a clear sky

  15. (29 Apr 2022)

    Deduplicating replication speed

  16. (25 Apr 2022)

    The network latency and the I/O spikes

  17. (22 Apr 2022)

    The encrypted database that was too big to replicate

  18. (20 Apr 2022)

    Misleading security and other production snafus

  19. (03 Jan 2022)

    An error on the first act will lead to data corruption on the second act…

  20. (13 Dec 2021)

    The memory leak that only happened on Linux

  21. (17 Sep 2021)

    The Guinness record for page faults & high CPU

  22. (07 Jan 2021)

    The file system limitation

  23. (23 Mar 2020)

    high CPU when there is little work to be done

  24. (21 Feb 2020)

    The self signed certificate that couldn’t

  25. (31 Jan 2020)

    The slow slowdown of large systems

  26. (07 Jun 2019)

    Printer out of paper and the RavenDB hang

  27. (18 Feb 2019)

    This data corruption bug requires 3 simultaneous race conditions

  28. (25 Dec 2018)

    Handled errors and the curse of recursive error handling

  29. (23 Nov 2018)

    The ARM is killing me

  30. (22 Feb 2018)

    The unavailable Linux server

  31. (06 Dec 2017)

    data corruption, a view from INSIDE the sausage

  32. (01 Dec 2017)

    The random high CPU

  33. (07 Aug 2017)

    30% boost with a single line change

  34. (04 Aug 2017)

    The case of 99.99% percentile

  35. (02 Aug 2017)

    The lightly loaded trashing server

  36. (23 Aug 2016)

    The insidious cost of managed memory

  37. (05 Feb 2016)

    A null reference in our abstraction

  38. (27 Jan 2016)

    The Razor Suicide

  39. (13 Nov 2015)

    The case of the “it is slow on that machine (only)”

  40. (21 Oct 2015)

    The case of the slow index rebuild

  41. (22 Sep 2015)

    The case of the Unicode Poo

  42. (03 Sep 2015)

    The industry at large

  43. (01 Sep 2015)

    The case of the lying configuration file

  44. (31 Aug 2015)

    The case of the memory eater and high load

  45. (14 Aug 2015)

    The case of the man in the middle

  46. (05 Aug 2015)

    Reading the errors

  47. (29 Jul 2015)

    The evil licensing code

  48. (23 Jul 2015)

    The case of the native memory leak

  49. (16 Jul 2015)

    The case of the intransigent new database

  50. (13 Jul 2015)

    The case of the hung over server

  51. (09 Jul 2015)

    The case of the infected cluster

74posts

Challenge

  1. (13 Oct 2023)

    Fastest node selection metastable error state–answer

  2. (12 Oct 2023)

    Fastest node selection metastable error state

  3. (19 Sep 2023)

    Spot the bug

  4. (04 Jan 2023)

    what does this code print?

  5. (14 Dec 2022)

    What does this code print?

  6. (01 Jul 2022)

    Find the stack smash bug… – answer

  7. (30 Jun 2022)

    Find the stack smash bug…

  8. (03 Jun 2022)

    Spot the data corruption

  9. (06 May 2022)

    Spot the optimization–solution

  10. (05 May 2022)

    Spot the optimization

  11. (06 Apr 2022)

    Why is this code broken?

  12. (16 Dec 2021)

    Find the slow down–answer

  13. (15 Dec 2021)

    Find the slow down

  14. (03 Nov 2021)

    The code review bug that gives me nightmares–The fix

  15. (02 Nov 2021)

    The code review bug that gives me nightmares–the issue

  16. (01 Nov 2021)

    The code review bug that gives me nightmares

  17. (16 Jun 2021)

    Detecting livelihood in a distributed cluster

  18. (21 Apr 2020)

    Generate matching shard id–answer

  19. (20 Apr 2020)

    Generate matching shard id

  20. (02 Jan 2020)

    Spot the bug in the stream

  21. (28 Sep 2018)

    The loop that leaks–Answer

  22. (27 Sep 2018)

    The loop that leaks

  23. (03 Apr 2018)

    The invisible concurrency bug–Answer

  24. (02 Apr 2018)

    The invisible concurrency bug

  25. (31 Jan 2018)

    Find the bug in the fix–answer

  26. (30 Jan 2018)

    Find the bug in the fix

  27. (19 Jan 2017)

    What does this code do?

  28. (26 Jul 2016)

    The race condition in the TCP stack, answer

  29. (25 Jul 2016)

    The race condition in the TCP stack

  30. (28 Apr 2015)

    What is the meaning of this change?

  31. (26 Sep 2013)

    Spot the bug

  32. (27 May 2013)

    The problem of locking down tasks…

  33. (17 Oct 2011)

    Minimum number of round trips

  34. (23 Aug 2011)

    Recent Comments with Future Posts

  35. (02 Aug 2011)

    Modifying execution approaches

  36. (29 Apr 2011)

    Stop the leaks

  37. (23 Dec 2010)

    This code should never hit production

  38. (17 Dec 2010)

    Your own ThreadLocal

  39. (03 Dec 2010)

    Querying relative information with RavenDB

  40. (29 Jun 2010)

    Find the bug

  41. (23 Jun 2010)

    Dynamically dynamic

  42. (28 Apr 2010)

    What killed the application?

  43. (19 Mar 2010)

    What does this code do?

  44. (04 Mar 2010)

    Robust enumeration over external code

  45. (16 Feb 2010)

    Premature optimization, and all of that…

  46. (12 Feb 2010)

    Efficient querying

  47. (10 Feb 2010)

    Find the resource leak

  48. (21 Oct 2009)

    Can you spot the bug?

  49. (18 Oct 2009)

    Why is this wrong?

  50. (17 Oct 2009)

    Write the check in comment

  51. (15 Sep 2009)

    NH Prof Exporting Reports

  52. (02 Sep 2009)

    The lazy loaded inheritance many to one association OR/M conundrum

  53. (01 Sep 2009)

    Why isn’t select broken?

  54. (06 Aug 2009)

    Find the bug fixes

  55. (26 May 2009)

    Find the bug

  56. (14 May 2009)

    multi threaded test failure

  57. (11 May 2009)

    The regex that doesn’t match

  58. (24 Mar 2009)

    probability based selection

  59. (13 Mar 2009)

    C# Rewriting

  60. (18 Feb 2009)

    write a self extracting program

  61. (04 Sep 2008)

    Don't stop with the first DSL abstraction

  62. (02 Aug 2008)

    What is the problem?

  63. (28 Jul 2008)

    What does this code do?

  64. (26 Jul 2008)

    Find the bug fix

  65. (05 Jul 2008)

    Find the deadlock

  66. (03 Jul 2008)

    Find the bug

  67. (02 Jul 2008)

    What is wrong with this code

  68. (05 Jun 2008)

    why did the tests fail?

  69. (27 May 2008)

    Striving for better syntax

  70. (13 Apr 2008)

    calling generics without the generic type

  71. (12 Apr 2008)

    The directory tree

  72. (24 Mar 2008)

    Find the version

  73. (21 Jan 2008)

    Strongly typing weakly typed code

  74. (28 Jun 2007)

    Windsor Null Object Dependency Facility

4posts

Filtering negative numbers, fast

  1. (15 Sep 2023)

    Beating memcpy()

  2. (13 Sep 2023)

    AVX

  3. (12 Sep 2023)

    Unroll

  4. (11 Sep 2023)

    Scalar

4posts

Podcast

  1. (21 Jul 2023)

    Hansleminutes - All the Performance with RavenDB's Oren Eini

  2. (17 Aug 2020)

    #SoLeadSaturday with Oren Eini

  3. (28 May 2020)

    Adventures in .NET High performance databases with RavenDB with Oren Eini

  4. (13 Mar 2020)

    Wave of Change 15

11posts

Integer compression

  1. (21 Jun 2023)

    FastPFor in C#, results

  2. (20 Jun 2023)

    Implementing FastPFor decoding in C#

  3. (19 Jun 2023)

    Implementing FastPFor encoding in C#

  4. (16 Jun 2023)

    Adapting FastPFor to RavenDB

  5. (15 Jun 2023)

    Porting simdcomp to C#

  6. (14 Jun 2023)

    The FastPFor code

  7. (13 Jun 2023)

    Understanding FastPFor

  8. (12 Jun 2023)

    SIMD bit packing and unusual usages

  9. (08 Jun 2023)

    Using SIMD bit packing in practice

  10. (07 Jun 2023)

    Understanding Simd Compression by Lemire

  11. (06 Jun 2023)

    delta encoding + variable size integers

7posts

Talk

  1. (09 Jun 2023)

    Scalable Architecture From the Ground Up

  2. (14 Dec 2021)

    Scalable architecture from the ground up

  3. (23 Apr 2020)

    Advanced indexing with RavenDB

  4. (22 Apr 2020)

    Modeling in a non relational world

  5. (03 Jan 2018)

    Modeling in a Non Relational World

  6. (29 Dec 2017)

    Extreme Performance Architecture

  7. (28 Nov 2016)

    System Architecture with NoSQL and RavenDB/DocDB

6posts

Fight for every byte it takes

  1. (01 May 2023)

    Decoding the entries

  2. (28 Apr 2023)

    Optimizing the encoding process

  3. (27 Apr 2023)

    Fitting 64 values in 4 bits

  4. (26 Apr 2023)

    Nibbling at the costs

  5. (25 Apr 2023)

    Variable size data

  6. (24 Apr 2023)

    Storing raw numbers

FUTURE POSTS

  1. re: Secure Drop protocol - about one day from now

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  1. re (33):
    16 Aug 2022 - How Discord supercharges network disks for extreme low latency
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    05 Mar 2024 - Technology & Friends - Oren Eini on the Corax Search Engine
  3. Meta Blog (2):
    23 Jan 2024 - I'm a JS Developer now
  4. Production postmortem (51):
    12 Dec 2023 - The Spawn of Denial of Service
  5. Challenge (74):
    13 Oct 2023 - Fastest node selection metastable error state–answer
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