I’m writing a program that wraps around dd to try and warn you if you are doing anything stupid. I have thus been giving the man page a good read. While doing this, I noticed that dd supported all the way up to Quettabytes, a unit orders of magnitude larger than all the data on the entire internet.
This has caused me to wonder what the largest storage operation you guys have done. I’ve taken a couple images of hard drives that were a single terabyte large, but I was wondering if the sysadmins among you have had to do something with e.g a giant RAID 10 array.
Not that big by today’s standards, but I once downloaded the Windows 98 beta CD from a friend over dialup, 33.6k at best. Took about a week as I recall.
I remember downloading the scene on American Pie where Shannon Elizabeth strips naked over our 33.6 link and it took like an hour, at an amazing resolution of like 240p for a two minute clip 😂
And then you busted after 15 seconds?
Totally worth it.
Yep, downloaded XP over 33.6k modem, but I’m in NZ so 33.6 was more advertising than reality, it took weeks.
I obviously downloaded a car after seeing that obnoxious anti-piracy ad.
I’m currently backing up my /dev folder to my unlimited cloud storage. The backup of the file
/dev/randomis running since two weeks.That’s silly. You should compress it before uploading.
No wonder. That file is super slow to transfer for some reason. but wait till you get to /dev/urandom. That file hat TBs to transfer at whatever pipe you can throw at it…
I’m guessing this is a joke, right?
/dev/random and other “files” in /dev are not really files, they are interfaces which van be used to interact with virtual or hardware devices. /dev/random spits out cryptographically secure random data. Another example is /dev/zero, which spits out only zero bytes.
Both are infinite.
Not all “files” in /dev are infinite, for example hard drives can (depending on which technology they use) be accessed under /dev/sda /dev/sdb and so on.
I’m aware of that. I was quite sure the author was joking, with the slightest bit of concern of them actually making the mistake.
Cool, so I learned something new today. Don’t run
cat /dev/randomWhy not try /dev/urandom?
😹
Ya know, if not for the other person’s comment, I might have been gullible enough to try this…
In grad school I worked with MRI data (hence the username). I had to upload ~500GB to our supercomputing cluster. Somewhere around 100,000 MRI images, and wrote 20 or so different machine learning algorithms to process them. All said and done, I ended up with about 2.5TB on the supercomputer. About 500MB ended up being useful and made it into my thesis.
Don’t stay in school, kids.
You should have said no to math, it’s a helluva drug
Entire drive/array backups will probably be by far the largest file transfer anyone ever does. The biggest I’ve done was a measly 20TB over the internet which took forever.
Outside of that the largest “file” I’ve copied was just over 1TB which was a SQL file backup for our main databases at work.
+1
From an order of magnitude perspective, the max is terabytes. No “normal” users are dealing with petabytes. And if you are dealing with petabytes, you’re not using some random poster’s program from reddit.
For a concrete cap, I’d say 256 tebibytes…
brother?..
I’ve done a 1PB sync between a pair of 8-node SAN clusters as one was being physically moved since it’d be faster to seed the data and start a delta sync rather than try to do it all over a 10Gb pipe. M
I’m in the same boat, just under 3PiB
I work in cinema content so hysterical laughter
Interesting! Could you give some numbers? And what do you use to move the files? If you can disclose obvs
A small dcp is around 500gb. But that’s like basic film shizz, 2d, 5.1 audio. For comparison, the 3D deadpool 2 teaser was 10gb.
Aspera’s commonly used for transmission due to the way it multiplexes. It’s the same protocolling behind Netflix and other streamers, although we don’t have to worry about preloading chunks.
My laughter is mostly because we’re transmitting to a couple thousand clients at once, so even with a small dcp thats around a PB dropped without blinking
Eh, what’s a dcp?
Digital Cinema Package; basically the movie file you’re watching when you’re in a movie theater.
Digital Cinema Package. Films come out in a buncha files that rather resemble a dvd rip. You got your video files (still called reels!) and your audio files, maybe some subtitle files and other bits and pieces and your assetmap (list of files) all in a big fat folder collectively called a DCP
That article was a weird mix of insider info and wild inaccuracies
Oh sorry! Here ya go!
Ahhh thanks for the reply! Makes sense! We also use Aspera here at work (videogames) but dont move that ammount, not even close.
I used to work in the same industry. We transferred several PBs from West US to Australia using Aspera via thick AWS pipes. Awesome software.
Hahahah did you enjoy Australian Internet? It’s wonderfully archaic
(MPS, Delux, Gofilex or Qubewire?)
In the early 2000s I worked on an animated film. The studio was in the southern part of Orange County CA, and the final color grading / print (still not totally digital then) was done in LA. It was faster to courier a box of hard drives than to transfer electronically. We had to do it a bunch of times because of various notes/changes/fuck ups. Then the results got courier’d back because the director couldn’t be bothered to travel for the fucking million dollars he was making.
You legally have to tell us if that movie was Shrek.
Hah, nope. Shrek was made in Glendale, so they probably had everything on site or right next door.
Fucking hell the raws woulda been gigantic
Oh yeah I worked in animation for a bit too. Those 4K master files are no joke lol
I don’t remember how many files, but typically these geophysical recordings clock in at 10-30 GB. What I do remember, though, was the total transfer size: 4TB. It was kind of like a bunch of .segd, and they were stored in this server cluster that was mounted in a shipping container for easy transport and lifting onboard survey ships. Some geophysics processors needed it on the other side of the world. There were nobody physically heading in the same direction as the transfer, so we figured it would just be easier to rsync it over 4G. It took a little over a week to transfer.
Normally when we have transfers of a substantial size going far, we ship it on LTO. For short distance transfers we usually run a fiber, and I have no idea how big the largest transfer job has been that way. Must be in the hundreds of TB. The entire cluster is 1.2PB, bit I can’t recall ever having to transfer everything in one go, as the receiving end usually has a lot less space.
4G?! That strikes fear into my heart!
The alternative was 5mbit/s VSAT. 4G was a luxury at that time.
At the rates I’m paying for 4G data, there are very few places in the world where it wouldn’t be cheaper for me to get on a plane and sneakernet that much data
a .png of your mom’s width
I’ve migrated petabytes from one GPFS file system to another. More than once, in fact. I’ve also migrated about 600TB of data from D3 tape format to 9940.
I once deleted an 800 gb log file, does that count
Depends, did you send it to the trash can first?
Nah, rm’d on shudders Oracle linux
I once abused an SMTP relay (my own) by emailing Novell a 400+ MB memory dump. Their FTP site kept timing out.
After all that, and them swearing they had to have it, the OS team said “Nope, we’re not going to look at it”. Guess how I feel about Novell after that?
This was in the mid-90’s.
Well, at least they were being on-brand. 😅
I worked at a niche factory some 20 years ago. We had a tape robot with 8 tapes at some 200GB each. It’d do a full backup of everyone’s home directories and mailboxes every week, and incremental backups nightly.
We’d keep the weekly backups on-site in a safe. Once a month I’d do a run to another plant one town over with a full backup.
I guess at most we’d need five tapes. If they still use it, and with modern tapes, it should scale nicely. Today’s LTO-tapes are 18TB. Driving five tapes half an hour would give a nice bandwidth of 50GB/s. The bottleneck would be the write speed to tape at 400MB/s.
8 TB but I’m just a regular Joe with a penchant for piracy.
Arrrrrr!
@data1701d downloading forza horizon 5 on Steam with around 120gb is the largest web-download, I can remember. In LAN, I’ve migrated my old FreeBSD NAS to my new one, which was a roughly 35TB transfer over NFS.
How long did that 35TB take? 12 hours or so?
