wiredtiger-users

1–30 of 290

Welcome to wiredtiger-users!

This group is an open forum for announcements and discussion of the WiredTiger Data Engine.

Related Resources: The WiredTiger Manual | Release packages | Bugs and feature requests

For MongoDB questions, including questions about WiredTiger inside of the MongoDB engine, please use the MongoDB Community forums.

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

0 selected

Praneeth

Nov 25

Packing and Unpacking Data

Hi, I am trying to experiment with packing and unpacking data, in particular the behaviour detailed

unread,

Packing and Unpacking Data

Hi, I am trying to experiment with packing and unpacking data, in particular the behaviour detailed

Nov 25

Uttam Pawar, … alexande...@mongodb.com6

Nov 14

Thread scaling WiredTiger engine

Alex, I appreciate the response. Now I've better understanding of the wtperf and it's output.

unread,

Thread scaling WiredTiger engine

Alex, I appreciate the response. Now I've better understanding of the wtperf and it's output.

Nov 14

Sean, Keith Smith6

Nov 11

Range query by WiredTiger c++

Hi Sean, I'm glad to hear your program is working better. To answer your questions: > Is there

unread,

Range query by WiredTiger c++

Hi Sean, I'm glad to hear your program is working better. To answer your questions: > Is there

Nov 11

Luke Chen

Nov 10

WiredTiger release 11.1.0

Hello, A new release of WiredTiger is available here: https://source.wiredtiger.com/releases/

unread,

WiredTiger release 11.1.0

Hello, A new release of WiredTiger is available here: https://source.wiredtiger.com/releases/

Nov 10

Keith Bostic

Oct 29

Re: B tree configuration

On Thursday, October 27, 2022 at 8:14:22 PM UTC-7 Sean wrote: As WiredTiger uses B tree (B+ tree),

unread,

Re: B tree configuration

On Thursday, October 27, 2022 at 8:14:22 PM UTC-7 Sean wrote: As WiredTiger uses B tree (B+ tree),

Oct 29

Martin Häusler, Keith Smith2

Oct 25

KeyStrings and array sort order

Hi Martin, Unfortunately, your question is a bit beyond my knowledge of the MongoDB server. I'm

unread,

KeyStrings and array sort order

Hi Martin, Unfortunately, your question is a bit beyond my knowledge of the MongoDB server. I'm

Oct 25

Shreya Ballijepalli, … alexande...@mongodb.com5

Oct 23

Understanding Prefix Compression for Integer Data Type in WiredTiger

Hi Shreya and Keith, Firstly, Keith: Thanks for the initial responses here - we really appreciate

unread,

Understanding Prefix Compression for Integer Data Type in WiredTiger

Hi Shreya and Keith, Firstly, Keith: Thanks for the initial responses here - we really appreciate

Oct 23

王欢明, … Keith Smith5

Oct 10

Hi there, Thanks for your interest in WiredTiger and related research literature. On Sun, Oct 9, 2022

unread,

Hi there, Thanks for your interest in WiredTiger and related research literature. On Sun, Oct 9, 2022

Oct 10

Martin Häusler, … Daniel Gottlieb9

Jul 17

Layout of multi-key indices as key-value pairs?

Thanks a lot for the clarifications Dan! The whole topic turned into quite the rabbit hole for me but

unread,

Layout of multi-key indices as key-value pairs?

Thanks a lot for the clarifications Dan! The whole topic turned into quite the rabbit hole for me but

Jul 17

Martin Häusler, Keith Smith4

Jul 8

Storage of field names?

Thank you for the quick reply Keith, that fully answers my question :) keith...@mongodb.com schrieb

unread,

Storage of field names?

Thank you for the quick reply Keith, that fully answers my question :) keith...@mongodb.com schrieb

Jul 8

Luke Chen

Jun 30

WiredTiger release 11.0.0

Hello, A new release of WiredTiger is available here: https://source.wiredtiger.com/releases/

unread,

WiredTiger release 11.0.0

Hello, A new release of WiredTiger is available here: https://source.wiredtiger.com/releases/

Jun 30

胡皓胜, … Keith Smith6

Mar 9

WT scan

Hi everyone, Thank you for your answers. I originally wanted to get a possible explanation from

unread,

WT scan

Hi everyone, Thank you for your answers. I originally wanted to get a possible explanation from

Mar 9

Puneet M, … Alexey Anisimov3

Mar 8

gcc vs clang

Hi Puneet, Thanks for your interest in WiredTiger! In your example, "cursor->set_value"

unread,

gcc vs clang

Hi Puneet, Thanks for your interest in WiredTiger! In your example, "cursor->set_value"

Mar 8

胡皓胜, alexande...@mongodb.com2

Feb 28

question about eviction of WT

Hi, Thanks for your interest in WiredTiger. The answer is that there is no need to synchronously

unread,

question about eviction of WT

Hi, Thanks for your interest in WiredTiger. The answer is that there is no need to synchronously

Feb 28

Jason Brown, … Brian Lane6

Jan 20

Seeking context on removal of WT Java API

Hi Jason, Back in March last year we completed a project to streamline the standalone releases of

unread,

Seeking context on removal of WT Java API

Hi Jason, Back in March last year we completed a project to streamline the standalone releases of

Jan 20

bai...@gmail.com, Keith Bostic2

Jan 12

Thoughts about compact in wiredtiger

On Tuesday, January 11, 2022 at 7:04:44 PM UTC-8 bai...@gmail.com wrote: For sqlite, db maintains the

unread,

Thoughts about compact in wiredtiger

On Tuesday, January 11, 2022 at 7:04:44 PM UTC-8 bai...@gmail.com wrote: For sqlite, db maintains the

Jan 12

chloi alverti, Alexandra Fedorova2

10/20/21

Race condition when WiredTiger is combined with PMEM and DAX

Hi Chloe, I am the author of the blog post you are citing. I am happy to try and help. I've used

unread,

Race condition when WiredTiger is combined with PMEM and DAX

Hi Chloe, I am the author of the blog post you are citing. I am happy to try and help. I've used

10/20/21

Martin Ichilevici de Oliveira, … Donald Anderson8

9/9/21

Understanding the binary format

Hello, I'm not aware of examples that do this directly. There are BSON decoders around,

unread,

Understanding the binary format

Hello, I'm not aware of examples that do this directly. There are BSON decoders around,

9/9/21

G F

9/9/21

Mongodb interface for high speed updates

I'd need to update read and write concurrently about 10000 different records/s with mongodb if

unread,

Mongodb interface for high speed updates

I'd need to update read and write concurrently about 10000 different records/s with mongodb if

9/9/21

Ouyang Tsuna

8/17/21

Is the pyhon pakage of wiredtiger supported in Windows?

I am a developer of database and I want to learn how to use wiredtiger and I have built the

unread,

Is the pyhon pakage of wiredtiger supported in Windows?

I am a developer of database and I want to learn how to use wiredtiger and I have built the

8/17/21

bai...@gmail.com, … Keith Bostic3

8/5/21

wiredtiger support prewarm cache on restart ?

I don't know what happens at the MongoDB layer (for MongoDB questions, including questions about

unread,

wiredtiger support prewarm cache on restart ?

I don't know what happens at the MongoDB layer (for MongoDB questions, including questions about

8/5/21

徐华叶, … Keith Bostic7

6/18/21

question about the key of first ref when split-insert

Hi Keith, Thank you for your reply. I have looked the change and totally agree with your change.

unread,

question about the key of first ref when split-insert

Hi Keith, Thank you for your reply. I have looked the change and totally agree with your change.

6/18/21

Luke Chen, Dmitri Shubin4

5/11/21

WiredTiger release 10.0.0

The previous (3.2.1) and current (10.0.0) releases (together with their links) had been rectified on

unread,

WiredTiger release 10.0.0

The previous (3.2.1) and current (10.0.0) releases (together with their links) had been rectified on

5/11/21

baoshang young, Haribabu Kommi5

3/17/21

Does wiredtiger will be stuck? If I do the full table scan over a huge table which size is beyond page cache size.

Hi, Hari. Thank you very much! Regards, ZaorangYang 在2021年3月17日星期三 UTC+8 下午2:05:25<haribab...@

unread,

Does wiredtiger will be stuck? If I do the full table scan over a huge table which size is beyond page cache size.

Hi, Hari. Thank you very much! Regards, ZaorangYang 在2021年3月17日星期三 UTC+8 下午2:05:25<haribab...@

3/17/21

amirouche...@gmail.com, Keith Bostic2

3/13/21

Subspace statistics: key count and bytes size

On Saturday, March 13, 2021 at 4:01:24 AM UTC-8 amirouche...@gmail.com wrote: I read mongodb does

unread,

Subspace statistics: key count and bytes size

On Saturday, March 13, 2021 at 4:01:24 AM UTC-8 amirouche...@gmail.com wrote: I read mongodb does

3/13/21

baoshang young, Keith Bostic3

2/5/21

Why WT use append-only Btree not use update in place Btree?

Thanks for your reply. Generally, the Btree's page size is greater than block size of the file

unread,

Why WT use append-only Btree not use update in place Btree?

Thanks for your reply. Generally, the Btree's page size is greater than block size of the file

2/5/21

bai...@gmail.com, … Keith Bostic5

2/4/21

What makes WT need reconciliation compared to Innodb ?

On Wednesday, February 3, 2021 at 11:17:09 PM UTC-8 zaor...@gmail.com wrote: I think it maybe gets

unread,

What makes WT need reconciliation compared to Innodb ?

On Wednesday, February 3, 2021 at 11:17:09 PM UTC-8 zaor...@gmail.com wrote: I think it maybe gets

2/4/21

bai...@gmail.com, sue.l...@mongodb.com3

2/1/21

Difficulties in understanding varieties of LSNs

> It seems that __wt_log_force_write doesn't necessarily write to OS buffers when the slot to

unread,

Difficulties in understanding varieties of LSNs

> It seems that __wt_log_force_write doesn't necessarily write to OS buffers when the slot to

2/1/21

baoshang young, Keith Bostic7

1/23/21

Does WT supports btree node merge?

Thanks for your help. Best regards Zaorang 在2021年1月24日星期日 UTC+8 上午12:44:22<Keith Bostic> 写道： On

unread,

Does WT supports btree node merge?

Thanks for your help. Best regards Zaorang 在2021年1月24日星期日 UTC+8 上午12:44:22<Keith Bostic> 写道： On

1/23/21

bai...@gmail.com, … Luke Chen14

1/11/21

How to run test suite in Evergreen ?

Good to know. I see this article https://engineering.mongodb.com/post/evergreen-continuous-

unread,

How to run test suite in Evergreen ?

Good to know. I see this article https://engineering.mongodb.com/post/evergreen-continuous-

1/11/21