Technical Issues - TPU Main Site & Forum (2024)

[wNotyarD]

So the biggest threat to TPU is not TomsHardware but W1zzard himself.

 

[AleksandarK]

Wizz so powerful he destroys as he creates

Jokes aside, glad we are back up. Lets continue

 

[W1zzard]

Ads are still disabled because the backup for that huge ads log table is still restoring

Edit: This is taking too long, still not even a significant percentage done .. restoring that table to an "archive" table (estimated a few hours), so that we can start serving ads in the meantime, so that we can try to give our advertisers the promised impressions for today, and make some $$ while we're at it

 

[Solaris17]

Edit: This is taking too long, still not even a significant percentage done .. restoring that table to an "archive" table (estimated a few hours), so that we can start serving ads in the meantime, so that we can try to give our advertisers the promised impressions for today, and make some $$ while we're at it

Time to get hellla complex and do sharding....but then distribute those with there own hot standbys.

 

[W1zzard]

Time to get hellla complex and do sharding....but then distribute those with there own hot standbys.

Too complex for just a log table (also for legal) that usually chugs along fine, because it's write-only, until the logs archiver deletes a few million rows from time to time (rate-limited).

The actionable logs for the frontend are in other tables, which are much smaller

Adding a Kafka is too complex, too. In the past I had them in text files, but analyzing the data was too complicated. Nowadays, considering how I can ask ChatGPT to write me a custom Python-based log analyzer software in 30 seconds, it might be worth rethinking this.

Edit: now that I have Kubernetes and spinning up stuff is so easy, even in some random DC where resources are cheap, moving all this logs stuff off the main boxes could be worth it

 

[Solaris17]

Too complex for just a log table (also for legal) that usually chugs along fine, because it's write-only, until the logs archiver deletes a few million rows from time to time (rate-limited).

The actionable logs for the frontend are in other tables, which are much smaller

Adding a Kafka is too complex, too. In the past I had them in text files, but analyzing the data was too complicated. Nowadays, considering how I can ask ChatGPT to write me a custom Python-based log analyzer software in 30 seconds, it might be worth rethinking this.

Edit: now that I have Kubernetes and spinning up stuff is so easy, even in some random DC where resources are cheap, moving all this logs stuff off the main boxes could be worth it

I would. Of course in the intrim, you could just knock out a python script to do what you were attempting to to begin with just you know, without the INSERT. Bonus points if you do the original read into RAM so you are not beating the shit out of the disk.

 

[W1zzard]

I would

What software would you use to store the data? It's not "a lot", maybe a few hundred gigs per year

 

[Frick]

April fools.

That explains it. I've never payed attention to those.

 

[Solaris17]

What software would you use to store the data? It's not "a lot", maybe a few hundred gigs per year

I meant specifically I would re-think it.

If It were me, at this point I would just fragment it. Not shard, but instead; given the need to poll this data, I would remove it from the main DBs, and instead spin up another that contains these rows. If nothing else, I would run exports/live syncs of those rows at regular intervals (if I didnt remove them from the main DBs) so I could query that data at will without putting the strain on the main data bases. It sounds like thats really what you were trying to do to begin with, but I think like you said, you got impatient, because, well you needed the data now. I would split off (the first sync is gonna take a bit) and then just keep those specific tables sync'd.

This is a lot cheaper of an idea then implementing sharding, or having some software store and recall this data at will. Like you said, I would keep the backups ofc, but move these specific rows to its own box in its own aux DB so I could touch it when I want. Since there is a biz need. You could realistically make it even more simple and leave those rows included in the main DB because %reasons% (legacy API calls, peace of mind w/e) and simply sync it. Then you arent even modifying the integrity of the main DBs, you are just duplicating a specific subset of data you want to be able to hit whenever you want. With the added benefit of not touching prod but still reletively fresh data.

At the point of having that broken off DB then you could use w/e software you see fit. You could open it in Access if you really wanted to.

 

[W1zzard]

because %reasons%

I am willing to make a change. It would reduce the size of our DB considerably, and separate mostly-content-related data and logs.

I control all legacy code, so np at all. Actually I'm migrating most of this code from PHP to .NET, another "free-time" project

or having some software store and recall this data at will

I do know MySQL and the tooling very well, which might beat learning how to use yet another hammer

 

[Solaris17]

I do know MySQL and the tooling very well, which might beat learning how to use yet another hammer

Thats what im saying, just split it off, DBs are pain.

EDIT: If you put it on another box too, your only loading that box with queries, so beyond hitting the DB your not burning CPU cycles.

 

[W1zzard]

which might beat learning how to use yet another hammer

Hmm ClickHouse seems to be a good fit. Free, open source. Any experience?

edit: woot, supported in adminer, backup and restore to s3, import directly from mysql server

 

[Solaris17]

Hmm ClickHouse seems to be a good fit. Any experience?

None personally, but I have heard of them and we were looking into using them on our failure rate DBs. I left that team during testing, but I didnt really hear any complaints. Bonus points for being FOSS.

 

[W1zzard]

Bonus points for being FOSS.

Won't touch anything else

 

[OneMoar]

anybody else get a random api timeout today?

also FOSS stands for the following
Fairly Outdated Security Standards
Fails Over Saturday Sunday
Frustrating Open Source Shenanigans
Free Offen Shoddy Software
Frequently outdated software stack

 

[Selaya]

Edit: This is taking too long, still not even a significant percentage done .. restoring that table to an "archive" table (estimated a few hours), so that we can start serving ads in the meantime, so that we can try to give our advertisers the promised impressions for today, and make some $$ while we're at it

damn, the homepage looks so weird and empty now ... am i correctly assuming it's still on safemode w/o ads being served?

 

[Assimilator]

At this point I realized that I mistyped the timestamp (2x "-01"), so it actually was actually copying ~70 GB of small rows into a temp table, and was now rolling them back one-by-one

Presumably that caused MySQL to treat it as `select *`? That's a yikes if so... explicit errors instead of trying to massage user input is always preferable.

 

[W1zzard]

damn, the homepage looks so weird and empty now ... am i correctly assuming it's still on safemode w/o ads being served?

won't be long

edit: fixed

 

[lexluthermiester]

WOW! Busy day. Thinking I caught the front end of all this yesterday.. Glad things are mostly sorted.

 

[wNotyarD]

Still going through some 502 Bad Gateway's and some sluggishness since the big 502 yesterday.

 

[chrcoluk]

Some 502s in last 5-10 minutes.

 

[dj-electric]

This was another really bad one. Damn...

 

[Assimilator]

Stop running bad SQL queries, W1zz

 

[A Computer Guy]

anybody else get a random api timeout today?

also FOSS stands for the following
Fairly Outdated Security Standards
Fails Over Saturday Sunday
Frustrating Open Source Shenanigans
Free Offen Shoddy Software
Frequently outdated software stack

I'll just add one more... Forgot Original Stackoverflow Source

 

[W1zzard]

Still going through some 502 Bad Gateway's and some sluggishness since the big 502 yesterday.

Yeah still working on some recovery .. 502s earlier todaywere caused by some eager timeout settings on mysql-router, so declared our main instance as unhealthy and blocked i :/