Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Scylla – Real-Time Big Data Database

scylladb.com

Post reply on HN
Print view View original

11–20 of 53 posts

Re: Scylla – Real-Time Big Data Database

#11

Post by dralley »

jandrewrogers wrote: post #9
andrewstuart wrote: post #2

I posted this because I'm interested to hear from anyone using it - how has it worked out for you? I note it's written in C++ which is a bit of a surprise - I'd expected Rust or Golang. Interesting as well is is AGPL - licensing is always contentious: https://github.com/scylladb/scylla/blob/master/LICENSE.AGPL

If you are building a database engine that strongly prioritizes performance, and Scylla does position itself that way, then C++ is the only practical choice today for many people, depending on the details. It isn't that C++ is great, though modern versions are pretty nice, but that it wins by default. Garbage collected languages like Golang and high-performance database kernels are incompatible because the GC interfe…

Zig might be a good option -- eventually, once it's past 1.0.

Re: Scylla – Real-Time Big Data Database

#12

Post by masterof0 »

krapht wrote: post #5
andrewstuart wrote: post #2

I posted this because I'm interested to hear from anyone using it - how has it worked out for you? I note it's written in C++ which is a bit of a surprise - I'd expected Rust or Golang. Interesting as well is is AGPL - licensing is always contentious: https://github.com/scylladb/scylla/blob/master/LICENSE.AGPL

Only on Hackernews would somebody be surprised that high-performance system software would be written in C++...

You read my mind. LOL. "Mr. Developer, can you please write your project in Rust, or __insert_your_meme_language_here__, or Javascript?"

Re: Scylla – Real-Time Big Data Database

#14

Post by biggestdummy »

kasey_junk wrote: post #8
criticaltinker wrote: post #6

The benchmarks against DynamoDB, Bigtable, & CockroachDB [1] appear quite impressive - anyone have real world experience that can attest to these claims of improved performance and reduced cost? > Scylla vs DynamoDB – Database Benchmark > 20x better throughput in the hot-partition test > Scylla Cloud is 1/7 the expense of DynamoDB when running equivalent workloads > Scylla Cloud: Average replication latency of 82ms.…

I was unwilling to sign up to read the actual benchmark report for the comparison to cockroachdb but it jumped out at me as odd. They solve completely different kinds of problems in my experience so I’m not surprised Scylla did better in raw throughout. That’s not interesting though. It would be just as weird for cockroach to put up a benchmark showing it outperforms in distributed sql queries. That said I’ve seen th…

Full report is posted here with no registration wall: https://www.scylladb.com/2021/01/21/cockroachdb-vs-scylla-be... And they admit that it's an odd comparison. "Obviously, the comparison is of the apples and oranges type..."

Re: Scylla – Real-Time Big Data Database

#15

Post by biggestdummy »

zinclozenge wrote: post #4
andrewstuart wrote: post #2

I posted this because I'm interested to hear from anyone using it - how has it worked out for you? I note it's written in C++ which is a bit of a surprise - I'd expected Rust or Golang. Interesting as well is is AGPL - licensing is always contentious: https://github.com/scylladb/scylla/blob/master/LICENSE.AGPL

I think the main reason it's in C++ is because of its async executor, Seastar. There's a similar Rust project called Glommio but seems still very early.

Glommio was created by Glauber Costa, one of the early contributors to Seastar (and Scylla). The resemblance between the two is not coincidence. https://glaubercosta-11125.medium.com/c-vs-rust-an-async-thr...

Re: Scylla – Real-Time Big Data Database

#16

Post by ethelward »

masterof0 wrote: post #12
krapht wrote: post #5

Earlier quoted context omitted.

Only on Hackernews would somebody be surprised that high-performance system software would be written in C++...

You read my mind. LOL. "Mr. Developer, can you please write your project in Rust, or __insert_your_meme_language_here__, or Javascript?"

Fromthe mouth of CockraochDB's CTO: ‶So if we were starting at this point in time, I would take a hard look at Rust, and I imagine that we would pick it instead of C++.″

Re: Scylla – Real-Time Big Data Database

#17

Post by PeterCorless »

criticaltinker wrote: post #6

The benchmarks against DynamoDB, Bigtable, & CockroachDB [1] appear quite impressive - anyone have real world experience that can attest to these claims of improved performance and reduced cost? > Scylla vs DynamoDB – Database Benchmark > 20x better throughput in the hot-partition test > Scylla Cloud is 1/7 the expense of DynamoDB when running equivalent workloads > Scylla Cloud: Average replication latency of 82ms.…

We just posted this today. Latest Cassandra 4.0 vs. Scylla 4.4. Note: Cassandra 4.0 is a HUGE improvement over Cassandra 3.11. But we're still many times faster:

https://www.scylladb.com/2021/08/24/apache-cassandra-4-0-vs-...

Re: Scylla – Real-Time Big Data Database

#18

Post by [deleted] »

andrewstuart wrote: post #2

I posted this because I'm interested to hear from anyone using it - how has it worked out for you? I note it's written in C++ which is a bit of a surprise - I'd expected Rust or Golang. Interesting as well is is AGPL - licensing is always contentious: https://github.com/scylladb/scylla/blob/master/LICENSE.AGPL

[deleted]

Re: Scylla – Real-Time Big Data Database

#19

Post by manigandham »

criticaltinker wrote: post #6

The benchmarks against DynamoDB, Bigtable, & CockroachDB [1] appear quite impressive - anyone have real world experience that can attest to these claims of improved performance and reduced cost? > Scylla vs DynamoDB – Database Benchmark > 20x better throughput in the hot-partition test > Scylla Cloud is 1/7 the expense of DynamoDB when running equivalent workloads > Scylla Cloud: Average replication latency of 82ms.…

Yes, Scylla does what it says. Used it in a prior adtech company and it beat everything else at that time for a very intensive key/value workload that also needed multi-regional replication.

The adtech industry also uses Aerospike heavily but that (at the time) had many replication data model issues compared to Scylla/Cassandra.

Re: Scylla – Real-Time Big Data Database

#20

Post by steeve »

criticaltinker wrote: post #6

The benchmarks against DynamoDB, Bigtable, & CockroachDB [1] appear quite impressive - anyone have real world experience that can attest to these claims of improved performance and reduced cost? > Scylla vs DynamoDB – Database Benchmark > 20x better throughput in the hot-partition test > Scylla Cloud is 1/7 the expense of DynamoDB when running equivalent workloads > Scylla Cloud: Average replication latency of 82ms.…

We (@zenlyapp) have been using it for 4 years, it is as fast as advertised, it’s insane. We personally benchmarked the 10x of Cassandra.
Post reply on HN