Oren Eini

aka Ayende Rahien

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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Comparison page for RavenDB and MongoDB

Nov 25 2021

RavenDB 5.3 New FeaturesJSON Patch

time to read 1 min | 150 words

JSON Patch is a feature that allows the frontend to send a set of changes on documents. If you are working with complex documents, that can result in a significant reduction in bandwidth. There are many scenarios where the client can modify a document on the browser, then produce the JSON Patch to make the server match the changes.

In RavenDB 5.3, we added direct support for implementing JSON Patch inside of RavenDB. The frontend code can forward the patch operations directly to RavenDB, where they will be executed by the database. Concurrent patches on the same document aren’t going to contend with one another and will be processed correctly. For example, in this post I’m using patch scripts to modify a document. I can do the same using JSON patch as well.

Here is how you can use the new ability:

Small improvement, but can make some scenarios much easier.

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More posts in "RavenDB 5.3 New Features" series:

(26 Nov 2021) Revisions includes
(25 Nov 2021) JSON Patch
(24 Nov 2021) Studio & Query improvements
(23 Nov 2021) TCP Compression
(18 Nov 2021) Experimental PostgreSQL wire protocol
(17 Nov 2021) Elasticsearch ETL
(15 Nov 2021) Incremental time series & implementing lambda based accounting
(12 Nov 2021) Incremental time series
(11 Nov 2021) Concurrent Subscriptions & Serial operations
(10 Nov 2021) Concurrent subscriptions

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FUTURE POSTS

What happens when a sparse file allocation fails? - 11 hours from now
NTFS has an emergency stash of disk space - 2 days from now
Challenge: Giving file system developer ulcer - 5 days from now
RavenDB 7.1: Next-Gen Pagers - 12 days from now
RavenDB 7.1: Write modes - 14 days from now

And 2 more posts are pending...

There are posts all the way to Feb 17, 2025

RECENT SERIES

Challenge (77):
20 Jan 2025 - What does this code do?
Answer (13):
22 Jan 2025 - What does this code do?
Production post-mortem (2):
17 Jan 2025 - Inspecting ourselves to death
Performance discovery (2):
10 Jan 2025 - IOPS vs. IOPS

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RECENT COMMENTS

Dmitry, Yes, but this is _known_ to be a 64 bits system - since we are allocating 3GB (not possible in 64 bits). Note t...

By Oren Eini on Answer: What does this code do?
That's why it is a good idea to compare the return value of `write` to the buffer size. "size_t" can be 32-bit on some system...

By Dmitry on Answer: What does this code do?
There's a reason we miss `write_exact` and `read_exact` from the standard library. In fact, I am surprised the chunk is actua...

By Pyth0n on Challenge: What does this code do?
kpvleeuwen, I agree, unfortunately I don't have anyone to ask off the top of my head. Thanks, I fixed the headers.

By Oren Eini on Performance discovery: IOPS vs. IOPS
It could be interesting to reach out to storage firmware developers and ask what write patterns they think would be useful ex...

By kpvleeuwen on Performance discovery: IOPS vs. IOPS

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