Sign in

Felipe Mendes

@felipemendes.dev
528 followers 295 following 94 posts

I code and explain computers to people. “Database Performance at Scale” Co-author Technical Director at ScyllaDB My opinions are my own

PostsRepliesMedia
Felipe Mendes @felipemendes.dev · 08/04/2025
@jaz.bsky.social try to read from mutation fragments if your release supports it. If its a clock skew, retries, you should observe both records along with their timestamps - from there you can determine the source of it. docs.scylladb.com/manual/stabl...
000
Felipe Mendes @felipemendes.dev · 26/02/2025
Yeah -- and tell you what, my modest Switch HW gives me more fun than the super heating PS5. Very high expectations for Nintendo's nextgen
020
Felipe Mendes @felipemendes.dev · 30/01/2025
(…)
020
Felipe Mendes @felipemendes.dev · 21/12/2024
O curioso caso em que a @folha.com e o @g1portal.bsky.social entre outros resolveram deixar os apagões em SP em segundo plano. Os “quase 200 mil” sem luz são números da PRÓPRIA Enel… O que mudou? A eleição acabou e o @guilhermeboulos.bsky.social perdeu 😉
050
Reposted by Felipe Mendes
The New York Times @nytimes.com · 15/12/2024
Decades after her mother became the first Brazilian actress to be nominated for an Academy Award and lost, Fernanda Torres may have a chance to win for her role in “I’m Still Here.” nyti.ms/3DqTf6E
Fernanda Torres and her mother, Fernanda Montenegro, are posing for a photo, sitting close together and looking straight into the camera. A headline reads: "A Surprise Blockbuster in Brazil Stokes Oscar Hopes and a Reckoning." Photo by María Magdalena Arréllaga for The New York Times.
723508653
Reposted by Felipe Mendes
MondySpartan @mondyspartan.bsky.social · 02/12/2024
Bluesky in Windows Longhorn Hillel 2003.
Sign in screenHome pageProfile page, with a new notification (the bell icon at the upper right corner flashes)
923307934
Felipe Mendes @felipemendes.dev · 30/11/2024
DM us and let's get to the gist of this - @avikivity.bsky.social @dorlaor.bsky.social :)
020
Felipe Mendes @felipemendes.dev · 30/11/2024
rfc group chat for easier thread recap WDYM by dropping? Is it crashing or gossip flapping? If a crash, replicas take sometime to find it out, plus in-flight reqs will timeout. If flapping, it could be an overwhelmed node/shard. Check the foreground/background queues in the detailed dashboard.
140
Reposted by Felipe Mendes
Theo Sanderson @theo.io · 16/11/2024
Exploring the full bluesky firehose, in three dimensions: firehose3d.theo.io
1832791692
Felipe Mendes @felipemendes.dev · 26/11/2024
do bskiers go to re:Invent? Hit me up at @scylladb.com booth #1958 at the Venetian Also check out DAT204-S 👀
000
Felipe Mendes @felipemendes.dev · 21/11/2024
What's up @scylladb.com - you learn things fast
010
Reposted by Felipe Mendes
Jake Gold @jacob.gold · 21/11/2024
@scylladb.bsky.social has joined the party! When we needed a horizontally scalable data store for Bluesky's v2 AppView implementation, I spent a ton of time testing and evaluating every option and ScyllaDB was the clear winner. The people there have been very nice too! github.com/scylladb/scy...
github.com
GitHub - scylladb/scylladb: NoSQL data store using the seastar framework, compatible with Apache Cassandra
NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylladb/scylladb
48316
Reposted by Felipe Mendes
Dominik Tornow @dominiktornow.bsky.social · 31/10/2024
Distributed Async Await, a new programming model for the cloud My P99CONF presentation is online. Thank you to the ScyllaDB team for a great conference experience ♥️ youtu.be/uOHYhdJPYYk?...
youtu.be
P99 CONF 2024 - Dominik Tornow, Founder & CEO at Resonate
YouTube video by ScyllaDB
0124
Reposted by Felipe Mendes
Ivan Burmistrov @isburmistrov.bsky.social · 28/10/2024
Video of our #p99conf talk about cloud cost in the context of ML Feature Store: youtu.be/X7u3Q3tOG5U?... The cost topic is far broader than we managed to cover, tons of things have been left unspoken!
youtu.be
P99 CONF 2024 | Feature Store Evolution Under Cost Constraints by David Malinge & Ivan Burmistrov
YouTube video by ScyllaDB
054
Felipe Mendes @felipemendes.dev · 25/10/2024
Nice! I will Watch that one ty
010
Felipe Mendes @felipemendes.dev · 25/10/2024
Hey there @blenon-raqnon.bsky.social ! Yes, currently the Operator doesn’t support resizing PVCs :-( the reason is because we highly recommend local SSDs for better performance This doesn’t mean we won’t ever support resizing PVCs but you’ve hit a known limitation atm Hope it addresses your qs
100
Felipe Mendes @felipemendes.dev · 23/10/2024
#P99CONF Starter pack!
030
Felipe Mendes @felipemendes.dev · 23/10/2024
Whats up?
000
Felipe Mendes @felipemendes.dev · 11/10/2024
Pouco ainda é conhecimento público como funciona a homologação, exploração e concessão de serviços de Internet via satélite no Brasil. Com a novela entre X e Starlink, e a ameaça de não cumprimento da ordem do STF, questionei à Anatel. Que seja público: docs.google.com/document/d/1...
docs.google.com
Anatel Consumidor 202409012451959 vfinal2.docx
Prezado cidadão, Em resposta à solicitação apresentada no Sistema Anatel Consumidor sob o Protocolo nº 202409012451959, apresentamos abaixo as informações relacionadas à competência da Agência para r...
010
Felipe Mendes @felipemendes.dev · 09/10/2024
Not sure if the author realized their ccTLD belongs to the Kingdom of Tonga. Do what I say…?
110
Felipe Mendes @felipemendes.dev · 19/09/2024
Well I wouldn't be so confident. Thingy about Threads is that the integration with Instagram makes its numbers veeery misleading. They didn't really "got a bazillion new users", users were always there ... www.instagram.com/snaq.co/p/DA... We need an updated www.similarweb.com/blog/insight...
230
Felipe Mendes @felipemendes.dev · 17/09/2024
Oh ok… Guess I came in late
010
Felipe Mendes @felipemendes.dev · 16/09/2024
Originally posted at my now gone TT x.com/cardeneti821... - copy'n'pasting here so I can reference it myself eventually lol
x.com
x.com
000
Felipe Mendes @felipemendes.dev · 16/09/2024
Keep in mind this is experimentation/learning work, and not planned for merging: github.com/fee-mendes/s... So WDYT ? Would you like to see more posts like these, and what are your thoughts on enabling database-y protocol interop? :-)
github.com
cql3 - as_json() - Deserialize Alternator :attrs · fee-mendes/scylla@a60a524
This commit changes the behavior of SELECT JSON calls when run on top of ScyllaDB Alternator tables. By definition, DynamoDB Attributes not part of a PRIMARY KEY (Hash or Sort Key in Dynamo, nor G...
100
Felipe Mendes @felipemendes.dev · 16/09/2024
Playing with OSS code is all about a learning journey and, community contribution. If you are curious on how this works, I just implemented a naive way to deserialize an Alternator serialized map via the Cassandra (CQL) binary protocol! 👇
100
Felipe Mendes @felipemendes.dev · 16/09/2024
This serialization happens due to a few reasons: 1. The CQL protocol doesn't allow one to store types differently than what you specified when you created the map. 2. The CQL protocol enforces a schema, while the DynamoDB API doesn't.
100
Felipe Mendes @felipemendes.dev · 16/09/2024
Fork it, do your thingy, experiment... You get the idea! :-) ScyllaDB implements a #DynamoDB API (Alternator). An implementation details is that it serializes all non-key Attributes (or GSIs) under an ":attrs" column, which is basically a map<text, blob> in CQL.
100
Felipe Mendes @felipemendes.dev · 16/09/2024
I've been fiddling around to get (more) familiar with ScyllaDB codebase (in particular the original AS JSON CQL function originally at github.com/psarna/scyll...), and understand how things work. Here's what super cool about working with databases and - most importantly - open source. 🧵
100
Felipe Mendes @felipemendes.dev · 16/09/2024
Há muito Mongo, DynamoDB, BigTable, Cassandra, HBase, etc em uso por aí. O ScyllaDB está neste segmento, e é interessante quando o fator price/performance começa a sair fora da curva. Dá para ir bem longe "só" com Postgres, mas existe um limite. Este é o momento em que busca-se por alternativas.
010
Felipe Mendes @felipemendes.dev · 13/09/2024
ICYMI github.com/bluesky-soci...
github.com
Add a hard-coded redirect for lulaoficial.bsky.social by pfrazee · Pull Request #5303 · bluesky-social/social-app
We have not yet introduced tooling for accounts to have multiple handles. While we wait for that tooling to land, lula is a somewhat notable account who recently changed their handle to a verified ...
010
Reposted by Felipe Mendes
Mateus Coutinho @mateuscoutinho.bsky.social · 10/09/2024
EXCLUSIVO: Conto hoje no @uol.com.br em parceria com Rafael Neves detalhes inéditos da investigação que levou à suspensão do X no Brasil. Confira a história completa no link: noticias.uol.com.br/politica/ult...
noticias.uol.com.br
Delegado que investiga Bolsonaro relatou ameaça uma semana após indiciá-lo
O delegado Fabio Shor, responsável por investigações que envolvem Jair Bolsonaro (PL), relatou em email à PF que ele e sua família foram ameaçados. Isso aconteceu uma semana após ele indiciar o ex-pre...
141083345
Reposted by Felipe Mendes
goeo like the @goeo.lol · 11/09/2024
you see. i don't use atproto for piracy. i only use it to download linux isos goeo.lol/xrpc/com.atp...
4388
Reposted by Felipe Mendes
Depiné @depine.bsky.social · 05/09/2024
Bluesky activity is now measured by brazilians' hours of sleep
Bluesky measured by brazilians' hours of sleep
5648021238
Reposted by Felipe Mendes
Jeff Nascimento @jnascim.info · 05/09/2024
Olha o #JornalNacional colocando o perfil do Bluesky no encerramento 🤩🦋 jnoficial.bsky.social
684886385
Felipe Mendes @felipemendes.dev · 03/09/2024
with regards to “community” domains, how does the atproto prevents impersonation? Like what happens if an owner theoretically swaps the Host entry in a TXT record or replaces it with a different did?
000
Felipe Mendes @felipemendes.dev · 03/09/2024
You don't need to create another profile, because you won't lose any followers or posts you already engaged within the platform. Put it this way: Would you trust anitta.com.br or anittaofficial.bsky.social? ;-)
100
Felipe Mendes @felipemendes.dev · 03/09/2024
If you change your handle, then your existing (bsky.social) handle will be free to be taken by others. You could take it before anyone else does, but it is pointless, as people can use skytools.anon5r.com/history?id=f... to verify your handle history (link points to my handle)
100
Felipe Mendes @felipemendes.dev · 03/09/2024
I’d guess the actual delay is probably to decide whether the profile should be federated against gov.br or against his own personal domain. STF in this case is easy. Although even then I can imagine orgs won’t naively start adding TXT records “just because”. Make a mistake and boom
030
Reposted by Felipe Mendes
bryan newbold @bnewbold.net · 03/09/2024
really glad @stf.jus.br set up a domain handle! encourage other government agencies and officials to do the same. both as verification+trust signal, and for autonomy+control.
101790158
Felipe Mendes @felipemendes.dev · 03/09/2024
Ah perfect, yup. That’s it. SADLY — from the looks of it our registrar (.br) doesn’t seem to allow 2nd level registrations out of the box. No one wants to be called person.foo.bar.br I guess I will study this a bit. Tyvm!
010
Felipe Mendes @felipemendes.dev · 03/09/2024
O at-protocol seria a analogia correta. O Bluesky é como o projeto GNU, Graysky LLVM and so on
000
Felipe Mendes @felipemendes.dev · 03/09/2024
Btw @mackuba.eu is there any sort of pre-baked web UI / reference implementation on this? I assume it’s all matter of assigning a __atproto.<SUB> to a TXT record? I could register a generic fancy-looking domain for like 10y and automate this if there’s general popular interest
100
Felipe Mendes @felipemendes.dev · 03/09/2024
@jairme.bsky.social @leilagermano.bsky.social @sleepinggiantsbr.bsky.social @pt-brasil.bsky.social let’s do this ! lmk if you need help I did this myself with my own profile
110
Felipe Mendes @felipemendes.dev · 03/09/2024
Embora possa indicar uma integração com o DRM da Denuvo, pode ser tb uma forma de ofuscar AVs
010
Reposted by Felipe Mendes
kriskacarvalho.bsky.social @kriskacarvalho.bsky.social · 02/09/2024
Isso sim deveria ser considerado crime em qualquer lugar do mundo. Um bilionário psicopata ameaçando um presidente, pior, ameaçando um país inteiro por não aceitar respeitar as leis e a soberania de uma nação.
2847877
Felipe Mendes @felipemendes.dev · 02/09/2024
Thanks for this. Despite the comparison, this clearly shows that - contrary to what Musk and his followers are arguing - the list of upheld brazilian accounts is actually small. The TIDs listed are well known by us already, and we all know the disinformation and attacks they had spread...
030
Reposted by Felipe Mendes
Kuba Suder 🇵🇱🇺🇦 @mackuba.eu · 02/09/2024
Ok, the handles in the Handle Directory should be up to date now - .br 🇧🇷 is now #8 on the ranking of country TLDs, and has already 3 accounts with >100k followers: blue.mackuba.eu/directory/br...
blue.mackuba.eu
Bluesky handles (.br)
A catalog of Bluesky handles grouped by generic or country TLDs
711319
Felipe Mendes @felipemendes.dev · 02/09/2024
Um aviso, a maior parte dos arquivos (inclusive os documentos) são suspeitos. O dmg pra Mac é inválido (e parece harmless). Não encontrei nada rápido no *.exe que explique o vetor de ataque, tomaram cuidado em esconder as strings. TLDR; se vc abriu os docs, troque a senha.
100
Felipe Mendes @felipemendes.dev · 02/09/2024
don't get me wrong, but given the recent Koo episode, I'd rather hold my horses. I can only hope this experiment succeeds.
010
Felipe Mendes @felipemendes.dev · 02/09/2024
"Ninguém pode pretender desenvolver suas atividades no Brasil sem observar as leis e a Constituição Federal." É o voto. sistemas.stf.jus.br/repgeral/vot...
sistemas.stf.jus.br
020