Oren Eini

CEO of RavenDB

a NoSQL Open Source Document Database

Get in touch with me:

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

Posts: 7,465
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Comments: 50,999

Copyright ©️ Ayende Rahien 2004 — 2023

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Couchbase vs RavenDB Performance at Rakuten Kobo Whitepaper
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
9posts

Recording

  1. (28 Aug 2023)

    RavenDB and High Performance with Oren Eini
  2. (17 Feb 2023)

    RavenDB Usage Patterns
  3. (12 Dec 2022)

    Software architecture with Oren Eini
  4. (17 Nov 2022)

    RavenDB in a Distributed Cloud Environment
  5. (25 Jul 2022)

    Build your own database at Cloud Lunch & Learn
  6. (15 Jul 2022)

    Non relational data modeling & Database engine internals
  7. (11 Apr 2022)

    Clean Architecture with RavenDB
  8. (14 Mar 2022)

    Database Security in a Hostile World
  9. (02 Mar 2022)

    RavenDB–a really boring database
50posts

Production postmortem

  1. (24 Jul 2023)

    The dog ate my request
  2. (03 Jul 2023)

    ENOMEM when trying to free memory
  3. (27 Jan 2023)

    The server ate all my memory
  4. (23 Jan 2023)

    The big server that couldn’t handle the load
  5. (16 Jan 2023)

    The heisenbug server
  6. (03 Oct 2022)

    Do you trust this server?
  7. (15 Sep 2022)

    The missed indexing reference
  8. (05 Aug 2022)

    The allocating query
  9. (22 Jul 2022)

    Efficiency all the way to Out of Memory error
  10. (18 Jul 2022)

    Broken networks and compressed streams
  11. (13 Jul 2022)

    Your math is wrong, recursion doesn’t work this way
  12. (12 Jul 2022)

    The data corruption in the node.js stack
  13. (11 Jul 2022)

    Out of memory on a clear sky
  14. (29 Apr 2022)

    Deduplicating replication speed
  15. (25 Apr 2022)

    The network latency and the I/O spikes
  16. (22 Apr 2022)

    The encrypted database that was too big to replicate
  17. (20 Apr 2022)

    Misleading security and other production snafus
  18. (03 Jan 2022)

    An error on the first act will lead to data corruption on the second act…
  19. (13 Dec 2021)

    The memory leak that only happened on Linux
  20. (17 Sep 2021)

    The Guinness record for page faults & high CPU
  21. (07 Jan 2021)

    The file system limitation
  22. (23 Mar 2020)

    high CPU when there is little work to be done
  23. (21 Feb 2020)

    The self signed certificate that couldn’t
  24. (31 Jan 2020)

    The slow slowdown of large systems
  25. (07 Jun 2019)

    Printer out of paper and the RavenDB hang
  26. (18 Feb 2019)

    This data corruption bug requires 3 simultaneous race conditions
  27. (25 Dec 2018)

    Handled errors and the curse of recursive error handling
  28. (23 Nov 2018)

    The ARM is killing me
  29. (22 Feb 2018)

    The unavailable Linux server
  30. (06 Dec 2017)

    data corruption, a view from INSIDE the sausage
  31. (01 Dec 2017)

    The random high CPU
  32. (07 Aug 2017)

    30% boost with a single line change
  33. (04 Aug 2017)

    The case of 99.99% percentile
  34. (02 Aug 2017)

    The lightly loaded trashing server
  35. (23 Aug 2016)

    The insidious cost of managed memory
  36. (05 Feb 2016)

    A null reference in our abstraction
  37. (27 Jan 2016)

    The Razor Suicide
  38. (13 Nov 2015)

    The case of the “it is slow on that machine (only)”
  39. (21 Oct 2015)

    The case of the slow index rebuild
  40. (22 Sep 2015)

    The case of the Unicode Poo
  41. (03 Sep 2015)

    The industry at large
  42. (01 Sep 2015)

    The case of the lying configuration file
  43. (31 Aug 2015)

    The case of the memory eater and high load
  44. (14 Aug 2015)

    The case of the man in the middle
  45. (05 Aug 2015)

    Reading the errors
  46. (29 Jul 2015)

    The evil licensing code
  47. (23 Jul 2015)

    The case of the native memory leak
  48. (16 Jul 2015)

    The case of the intransigent new database
  49. (13 Jul 2015)

    The case of the hung over server
  50. (09 Jul 2015)

    The case of the infected cluster
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
3posts

Looking into Corax’s posting lists

  1. (17 Apr 2023)

    Part III
  2. (14 Apr 2023)

    Part II
  3. (30 Nov 2022)

    Part I
12posts

Answer

  1. (05 Jan 2023)

    what does this code print?
  2. (15 Dec 2022)

    What does this code print?
  3. (07 Apr 2022)

    Why is this code broken?
  4. (20 Jan 2017)

    What does this code do?
  5. (16 Aug 2011)

    Modifying execution approaches
  6. (30 Apr 2011)

    Stopping the leaks
  7. (24 Dec 2010)

    This code should never hit production
  8. (21 Dec 2010)

    Your own ThreadLocal
  9. (11 Feb 2010)

    Debugging a resource leak
  10. (03 Sep 2009)

    The lazy loaded inheritance many to one association OR/M conundrum
  11. (04 Sep 2008)

    Don't stop with the first DSL abstraction
  12. (12 Jun 2008)

    How many tests?

FUTURE POSTS

No future posts left, oh my!

RECENT SERIES

  1. Challenge (74):
    13 Oct 2023 - Fastest node selection metastable error state–answer
  2. Filtering negative numbers, fast (4):
    15 Sep 2023 - Beating memcpy()
  3. Recording (9):
    28 Aug 2023 - RavenDB and High Performance with Oren Eini
  4. Production postmortem (50):
    24 Jul 2023 - The dog ate my request
  5. Podcast (4):
    21 Jul 2023 - Hansleminutes - All the Performance with RavenDB's Oren Eini
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