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New Linux Petabyte-Scale Distributed File System

samzenpus posted more than 3 years ago | from the check-it-out dept.

Linux 132

An anonymous reader writes "A recent addition to Linux's impressive selection of file systems is Ceph, a distributed file system that incorporates replication and fault tolerance while maintaining POSIX compatibility. Explore the architecture of Ceph and learn how it provides fault tolerance and simplifies the management of massive amounts of data."

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132 comments

Do niggers use linux? (-1, Troll)

Anonymous Coward | more than 3 years ago | (#32106424)

i'm curious..

Re:Do niggers use linux? (-1, Troll)

Anonymous Coward | more than 3 years ago | (#32106450)

No, they steal Windows, like they steal everything.

Re:Do niggers use linux? (-1, Troll)

Anonymous Coward | more than 3 years ago | (#32106576)

I rated you funny. It may not be PC, but it was funny...

Re:Do niggers use linux? (4, Insightful)

Cryacin (657549) | more than 3 years ago | (#32106692)

I think the big issue in the programming community as a whole is the current lack of understanding of the differences between eventual and atomic consistency.

Distributed file systems work quite well when you have a single source of truth, but when you have multiple data stores, you can have multiple sources of truth. It essentially adds a temporal dimension to your data. As in, John Smith is a debtor of XYZ corp on Monday morning, but due to the server being down, we haven't realised on Tuesday morning that he paid his bill on Monday afternoon. Add late fee penalties.

It adds another layer of complexity to an application that delayed gestures roll back transitive actions between actors in an Ecosystem. In the example, it would be to send out another letter stating that the late fee penalties have been removed, and if already paid, a refund is to be issued.

Re:Do niggers use linux? (5, Insightful)

Ethanol-fueled (1125189) | more than 3 years ago | (#32106930)

It was noble of you to try to wrest control of a troll thread, but your comment loses a lot of credibility for being titled "Re: Do niggers use linux?"

Would it hurt to at least change the title while you strive for visibility and relevance? When I saw the title of your post, I half-expected to see a poorly-written diatribe against Jamal Jackson for playing basketball and chasing caucasian women.

Thank you, kind sir, for listening. We all must do our part to prevent trolling!

Re:Do niggers use linux? (-1, Troll)

Anonymous Coward | more than 3 years ago | (#32106452)

Yep. That's why Ubuntu has a shit-brown theme because it symbolizes its nigger origins.

Re:Do niggers use linux? (-1, Troll)

Anonymous Coward | more than 3 years ago | (#32107036)

i'm curious..

Nah, bitch. I ain't gonna be usin' no Ubuntu. Now get yo cracka ass to work. My baby mama is be needin yo money for her gubnet checks.

In soviet Russia (2, Funny)

ds_online (803466) | more than 3 years ago | (#32106446)

but in soviet Russia file systems Distribute you

Re:In soviet Russia (1, Funny)

peaceful_bill (661382) | more than 3 years ago | (#32106460)

I for one, welcome our new petabyteFS

Re:In soviet Russia (4, Funny)

tomhudson (43916) | more than 3 years ago | (#32106578)

I for one, welcome our new petabyteFS

Let me guess - you work for the SEC and need it for your porn collection

Re:In soviet Russia (1)

Chas (5144) | more than 3 years ago | (#32108696)

No, I think that's PEDObyte.

Just keep them away from children (with guns and horrendous megaviolence preferably) and you're golden.

Re:In soviet Russia (3, Funny)

ls671 (1122017) | more than 3 years ago | (#32106926)

640 petabytes should be enough for everybody.

Re:In soviet Russia (1)

davester666 (731373) | more than 3 years ago | (#32107644)

only if I trim my porn collection to only include the actual sex acts...

Re:In soviet Russia (1)

ooshna (1654125) | more than 3 years ago | (#32107692)

Yes Japanese women puking on each other is not an actual sex act.

Re:In soviet Russia (3, Funny)

Profane MuthaFucka (574406) | more than 3 years ago | (#32107904)

If you woke up one morning in Tokyo to discover that someone had blurred your genitalia during the night, I'd bet you would consider puking on someone too.

Re:In soviet Russia (0)

Anonymous Coward | more than 3 years ago | (#32108338)

Not /everybody/, but /anybody/. Please turn your card in.

History (4, Informative)

Alcoholic Dali (1024937) | more than 3 years ago | (#32106480)

Ceph was designed by Sage Weil (of WebRing fame), who is also one of the founders of DreamHost. They will likely be using it internally soon, if they aren't already. http://en.wikipedia.org/wiki/DreamHost [wikipedia.org]

Re:History (4, Informative)

TooMuchToDo (882796) | more than 3 years ago | (#32106602)

http://www.dreamhost.com/jobs.html [dreamhost.com]

FILE SYSTEMS SOFTWARE ENGINEER
Los Angeles, CA

New Dream Network has a vacancy for a Senior File Systems Software Engineer in Los Angeles, CA. Minimum requirements – Master’s degree in Computer Science or Computer Engineering, minimum of 2 years experience in storage programming, and background in Linux kernel programming, file systems development, network programming and Operating Systems design.

Qualified applicants should send a plain text resume to cephjobs@dreamhost.com

Re:History (2, Funny)

MichaelSmith (789609) | more than 3 years ago | (#32107006)

Qualified applicants should send a plain text resume

Ha! That'll cut down on the noise. I wonder how many job seekers have ever heard of plain text?

Re:History (3, Funny)

John Hasler (414242) | more than 3 years ago | (#32107804)

"Plain text". That's just a Microsoft Word document with no embedded images or graphs or anything, right?

Re:History (4, Funny)

ae1294 (1547521) | more than 3 years ago | (#32107962)

I sent mine in ANSI format so I could blink my contact info...

Re:History (0)

Anonymous Coward | more than 3 years ago | (#32108226)

Yeah, nothing's better than blinking text when I'm trying to read a phone number.

Re:History (1)

frinkacheese (790787) | more than 3 years ago | (#32108666)

%!PS
1.00000 0.99083 scale /Courier findfont 12 scalefont setfont
0 0 translate /row 769 def
85 {/col 18 def 6 {col row moveto (

That is a hilariously good start to a Thursday morning on the UK election day. Wish I could mod it funny.

)show /col col 90 add def}
repeat /row row 9 sub def} repeat
showpage save restore

Re:History (2, Insightful)

volcan0 (1775818) | more than 3 years ago | (#32106978)

I always liked dreamhost (not for their uptime....), this just confirms it. It is good to see a compagny using open source software contributing back like this.

Is data integrity really necessary for large data? (2, Interesting)

BadAnalogyGuy (945258) | more than 3 years ago | (#32106546)

Look at Google and Facebook, arguably among the top users of massive databases. They have petabytes upon petabytes of data stored and are constantly growing. But what happens if they lose some data?

Nothing. They can always go back and regenerate that data. It's just a matter of time.

So at this large scale, it doesn't make any sense at all to focus on data integrity beyond making sure that fopen() and fread() don't return garbage. It's the smaller databases that contain critical information that need data integrity. These are typically sub-terabyte, though some may creep over that limit in a few uncommon instances.

And realistically, if you don't want your data to be hacked up, lost, then thrown out with a bad drive, ReiserFS or any other modern journaling filesystem is the right choice.

I wouldn't bet money on distributed filesystems just yet.

Re:Is data integrity really necessary for large da (5, Informative)

CoderJoe (97563) | more than 3 years ago | (#32106618)

Google's BigFile/BigTable architecture is a distributed filesystem. if a node goes down, the data that was on that node gets copied to other nodes to keep the replication count up.

Facebook is using apache cassandra, which adopts similar designs.

Re:Is data integrity really necessary for large da (0, Redundant)

kevin7kal (698673) | more than 3 years ago | (#32107426)

this copying of the node happens after the node goes down? so the software time travels? That totally disproves Stephen Hawkin's recent time travel can only go forward statement! DUDE - AWSOME!

Re:Is data integrity really necessary for large da (4, Insightful)

glwtta (532858) | more than 3 years ago | (#32107648)

this copying of the node happens after the node goes down?

One of the remaining replicas of each block on the failed node is copied so the total replication count does not go down. The original was perhaps poorly phrased, no need to be a dick about it, though.

Re:Is data integrity really necessary for large da (2, Interesting)

Anonymous Coward | more than 3 years ago | (#32107812)

Yes, but Google's file system makes no attempt to implement either the POSIX standard or the Linux VFS. It's highly specialized to only deal with the types of loads that Google sees. As a general solution, it's worth is debatable.

Re:Is data integrity really necessary for large da (1)

CoderJoe (97563) | more than 3 years ago | (#32108026)

Yes, but Google's file system makes no attempt to implement either the POSIX standard or the Linux VFS. It's highly specialized to only deal with the types of loads that Google sees. As a general solution, it's worth is debatable.

But that is not what the original question was about. The original question was about sites like Google or Facebook using anything like a distributed file system to keep from losing data.

Re:Is data integrity really necessary for large da (1)

CoderJoe (97563) | more than 3 years ago | (#32106646)

Oh, and I forgot about Amazon Dynamo.

Re:Is data integrity really necessary for large da (1)

Per Wigren (5315) | more than 3 years ago | (#32108754)

..and the pretty amazing open source distributed multi-master no-single-point-of-failure database Riak [basho.com].

Re:Is data integrity really necessary for large da (4, Insightful)

jdhutchins (559010) | more than 3 years ago | (#32106888)

While google may be able to go ahead and re-index websites if it loses that data, "regenerating" gmail and google docs stuff isn't quite so easy, and even small amounts of data loss would kill those applications (especially among paid users).

Re:Is data integrity really necessary for large da (5, Insightful)

morgan_greywolf (835522) | more than 3 years ago | (#32106916)

Nothing. They can always go back and regenerate that data. It's just a matter of time.

You just contradicted yourself. You're right; it's just a matter of time. Only, thing is, this is the Internet. How long to recreate that data? Weeks? Months? Years? 6 months is an eternity on the Net.

If all the accounts and stories were lost on Slashdot due to a massive database failure, how many people would come back, creating a new account and so forth? How many long would it take before there was enough content and accounts to make it interesting again? Now realize that Slashdot is a drop in the bucket compared to Google.

Re:Is data integrity really necessary for large da (1)

PenguinBob (1208204) | more than 3 years ago | (#32107084)

If that were to happen, I'd finally be able to get a low UID!

Re:Is data integrity really necessary for large da (1)

tjones (1282) | more than 3 years ago | (#32107796)

Why? Is there something special about those?

Re:Is data integrity really necessary for large da (2, Funny)

ae1294 (1547521) | more than 3 years ago | (#32107972)

Why? Is there something special about those?

You must be new here!

Nope (2, Informative)

avm (660) | more than 3 years ago | (#32108028)

Nothing special at all. It only means Taco used sequential instead of randomised integers for user ids, which in turn can be viewed as a very loose chronology of user registrations.

In other words, no.

Re:Is data integrity really necessary for large da (5, Informative)

ProfMobius (1313701) | more than 3 years ago | (#32107028)

First, Facebook & Google data are not possible to regenerate, as they are personal things, like emails, messages, posts, etc.

Second, you have other sectors producing large amount of data beside your favourite networking website. One example is the LHC. It is going to produce terabytes of data per DAY (15 petabytes per year). Another are space telescopes. Those data can't just be 'regenerated'. 1 day worth of data is incredibly expensive to produce.

Distributed file systems are already there, and people use them. Maybe not on your level of computer usage.

When you don't know what you are talking about, I think it is better to just keep quiet.

Re:Is data integrity really necessary for large da (-1, Redundant)

Anonymous Coward | more than 3 years ago | (#32107888)

yeah

my raid array can't regenerate my data because it's personal

and copyrighted

Re:Is data integrity really necessary for large da (1)

OeLeWaPpErKe (412765) | more than 3 years ago | (#32110104)

Acutally your raid array can't regenerate your data in most failure scenarios because of idiotic design :

Bit error in RAID 1 :

disk A : 000000111011011
disk B : 001000111011011

that's the information your raid array has in case of a bit error. Do tell, which is the correct one ?

Or, better, yet, a 3 disk RAID-5 array :

disk A : 000000111011011
disk B : 001001010011001
parity disk : 001101101000010

clearly something is wrong ... now fix the problem.

RAID is worthless unless you know which data set is wrong.

Re:Is data integrity really necessary for large da (0)

Anonymous Coward | more than 3 years ago | (#32107948)

If you've stored the data, you can reproduce the data in the event some of it is lost.

RAID much? PAR often?

Re:Is data integrity really necessary for large da (0)

Anonymous Coward | more than 3 years ago | (#32109538)

Calculate the overhead of say, RAID 6, for 1 Petabyte of data.

Re:Is data integrity really necessary for large da (1)

gilboad (986599) | more than 3 years ago | (#32108566)

Why do you assume that:
A: PB storage is very rare and only used by several large organizations.
B: PB storage is used to house generated data the can easily be replaced.

- Gilboa

Re:Is data integrity really necessary for large da (1)

drsmithy (35869) | more than 3 years ago | (#32108964)

Nothing. They can always go back and regenerate that data. It's just a matter of time.

No, they can't. This is a really, really important distinction to make. They cannot "regenerate" the data. They *might* (perhaps even "probably") be able to "recopy" the data, *assuming the original source is still available*.

Is it ready for primetime? (5, Informative)

Meshach (578918) | more than 3 years ago | (#32106554)

The headline in the Ceph wiki [newdream.net]: Ceph is under heavy development, and is not yet suitable for any uses other than benchmarking and review.

Re:Is it ready for primetime? (0, Redundant)

EdIII (1114411) | more than 3 years ago | (#32107698)

Thanks. I was about to download it to service my rather large storage requirements for porn, but it seems too risky now.

Re:Is it ready for primetime? (0)

Anonymous Coward | more than 3 years ago | (#32107940)

"Service" porn storage?

Ha CAPTCHA = capacity!

Re:Is it ready for primetime? (1)

BeardedChimp (1416531) | more than 3 years ago | (#32108992)

Yep and they are using btrfs for the underlying filesystem which is also not at the production use stage.

For me this is quite a co-incidence, I just spent all yesterday reading up on fault taulerant distributed file systems and ceph and seemed quite promising until I realised they are also waiting on kernel 2.6.34 as it has their patches merged.

For anyone who knows more about this stuff, I was quite interested in xtreemfs as it seems to allow you to add nodes anywhere on the internet and it will deal with the fault tolerance/striping. For my purposes I don't care about having massive throughput but unfortunately xtreemfs doesn't seem to be deployed in many places so I don't know how good it is.

Totally not ripped from a webcomic... (2, Insightful)

AdmiralXyz (1378985) | more than 3 years ago | (#32106568)

"It took a lot of work, but this latest Linux patch enables support for multi-petabyte file organization and storage!"
"Do you have support for smooth, full-screen Flash video yet?"
"No, but who uses that?"

Re:Totally not ripped from a webcomic... (4, Insightful)

yourexhalekiss (833943) | more than 3 years ago | (#32106604)

"Do you have support for smooth, full-screen Flash video yet?"

Frankly, that's Adobe's fault, not ours.

Re:Totally not ripped from a webcomic... (-1, Flamebait)

Anonymous Coward | more than 3 years ago | (#32106630)

Having a rats nest of audio and video apis doesn't help the situation. You freetards should be happy what you get for your piece of shit OS.

Re:Totally not ripped from a webcomic... (1)

h4rr4r (612664) | more than 3 years ago | (#32106744)

I see the adobe developer made it here alright.

Dude, get another job if you hate this one so much.

Re:Totally not ripped from a webcomic... (0)

Insightfill (554828) | more than 3 years ago | (#32107186)

Having a rats nest of audio and video apis doesn't help the situation. You freetards should be happy what you get for your piece of shit OS.

Wow, there's a +1 insightful and a -1 troll in the same post. I've got mod-points, but was really not able to decide which way to go with this one.

Re:Totally not ripped from a webcomic... (0)

Anonymous Coward | more than 3 years ago | (#32107204)

You have a point with audio APIs, but video APIs are pretty straightforward: USE VA-API. How many more times to do we have to tell you? Dipshit.

Re:Totally not ripped from a webcomic... (3, Interesting)

SanityInAnarchy (655584) | more than 3 years ago | (#32107318)

Pick one.

What you call a "rat's nest", we call "compatibility", and it works surprisingly well. Writing a game? Use OpenAL -- the distro will configure it to work. Need realtime audio for a DAW? Use JACK. Anything else? Use ALSA.

What if you picked the "wrong one"? Doesn't really matter. If you managed to build a decent DAW on top of ALSA, it'll continue to work on top of ALSA. If you used OSS, that still works today.

Video APIs? Flash has its own codecs, so all you need to know is xvideo.

Seriously, you have even less of an excuse than people who bitch about how Linux has both GNOME and KDE, and oh, the horrors of actually having a choice.

Re:Totally not ripped from a webcomic... (-1, Troll)

Anonymous Coward | more than 3 years ago | (#32107334)

oh, the horrors of actually having a choice.

So then you freetards need to stop whining when 99% of the world choices not to use or support your shitty OS.

Re:Totally not ripped from a webcomic... (1)

jedidiah (1196) | more than 3 years ago | (#32107738)

Our tools are better. Your "freetard" rhetoric doesn't matter. So does your "market share" rhetoric.

Adobe doesn't have any real excuse for being shown up by ALL of the "freetard" developers.

Re:Totally not ripped from a webcomic... (4, Insightful)

SanityInAnarchy (655584) | more than 3 years ago | (#32107814)

So then you freetards need to stop whining when 99% of the world choices not to use or support your shitty OS.

99% of the world does use our OS. You're likely doing it right now. Or did you think Slashdot runs on IIS?

And not that it'd make much difference to an obvious troll, but I use proprietary software when appropriate, and I am in favor of open source, not necessarily "free software." Not every Linux user is RMS. (And if they were, they probably wouldn't be Linux users.)

Re:Totally not ripped from a webcomic... (1, Funny)

Anonymous Coward | more than 3 years ago | (#32108634)

Not every Linux user is RMS. (And if they were, they probably wouldn't be Linux users.)

Ahem ... That should be: "Not every GNU/Linux user is ... "

Re:Totally not ripped from a webcomic... (1)

vegiVamp (518171) | more than 3 years ago | (#32109094)

How many people would you estimate watch Dreamworks offerings ?

Guess what their renderfarm runs.

Re:Totally not ripped from a webcomic... (5, Insightful)

jedidiah (1196) | more than 3 years ago | (#32107684)

> Having a rats nest of audio and video apis doesn't help the situation. You freetards should be happy what you get for your piece of shit OS.

The ffmpeg developers can manage yet the "professionals" at Adobe cant?

"freetardry" is the only reason h264 acceleration is supported under Linux.

If we waited for the nickel-and-dime-you approach to come to the rescue we would still be waiting.

At least with MacOS, Adobe had a real excuse.

Re:Totally not ripped from a webcomic... (-1, Troll)

Anonymous Coward | more than 3 years ago | (#32106760)

Both of my linux systems play full screen flash far better than my windows box plays any flash, full screen or otherwise. Sometimes the Windows box even stops playing the video unless the mouse is actually moving within the flash frame, which never happens on either linux box. I'd say it's the processor, but one of the linux boxes is a netbook with a lesser CPU than the windows box, so that clearly isn't it.

Re:Totally not ripped from a webcomic... (0, Offtopic)

Anonymous Coward | more than 3 years ago | (#32106966)

Both of my linux systems play full screen flash far better than my windows box plays any flash

Hahahaha. 0/10.

Re:Totally not ripped from a webcomic... (3, Insightful)

Hurricane78 (562437) | more than 3 years ago | (#32107254)

Yes it is ours. If “ours” means: Us idiots who made Flash dominant in the first place, by using it in any way.
It always takes two. The ass doing it, and the idiot letting him do it. That guy with the narrow mustache from the 40s would agree to that: “What luck for rulers that men do not think.” ^^

Re:Totally not ripped from a webcomic... (0)

Anonymous Coward | more than 3 years ago | (#32107300)

Frankly, that's Adobe's fault, not ours.

You're spot on. If it's not free and open, how can we contribute?

Re:Totally not ripped from a webcomic... (1, Redundant)

FauxPasIII (75900) | more than 3 years ago | (#32107436)

At least link the the comic you're totally not ripping from. ;)

http://xkcd.com/619/ [xkcd.com]

Re:Totally not ripped from a webcomic... (2, Interesting)

iknowcss (937215) | more than 3 years ago | (#32107750)

Actually, I'm glad that he didn't link to it. I swear, every other story on Slashdot has some comment with a link to XKCD. Hey, we get the jokes. All of us read XKCD. You don't link to a video of Yakov Smirnoff every time you make a Soviet Russia joke, do you?

Re:Totally not ripped from a webcomic... (0, Troll)

scotch (102596) | more than 3 years ago | (#32108030)

xkcd links get an automatic redundant rating from me when I have points. Just so everyone knows.

Re:Totally not ripped from a webcomic... (0)

Anonymous Coward | more than 3 years ago | (#32109864)

So a nerd is sent to /. for the first time. At night the lights in his basements are turned off, and an oldtimer goes to the comments and posts "Number 123!" and is instantly modded +5 funny. A few minutes later, somebody else posts, "Number 378!" Again, the post gets a positive rating.

The new guy asks a low UID what is going on. "Well," says the oldtimer, "we've all seen every xkcd comic a million times before. So we just yell out the number instead of linking to the comic."

The new guy decides to try this for himself, and posts "Number 619!", but all he gets is a -1 redundant. He asks the low UID, "What's wrong? Why didn't I get modded up?"

"Well," said the older /.er, "sometimes it's not the joke, but how you tell it."

Re:Totally not ripped from a webcomic... (1)

glwtta (532858) | more than 3 years ago | (#32107604)

This may come as a shock, but Linux has more useful applications than "dicking around on youtube".

Re:Totally not ripped from a webcomic... (1)

jedidiah (1196) | more than 3 years ago | (#32107782)

Even so. The this whole argument is mindless nonsense. Adobe finally only offered partial acceleration support even for Windows just recently.

The idea that any variant of Flash is any better than any other (or worse) is just Lemming nonsense.

Re:Totally not ripped from a webcomic... (1)

John Hasler (414242) | more than 3 years ago | (#32107846)

Yes, but users of OSs that don't can't understand why anyone would use an OS that doesn't.

Re:Totally not ripped from a webcomic... (3, Insightful)

evilviper (135110) | more than 3 years ago | (#32108298)

"Do you have support for smooth, full-screen Flash video yet?"

A) Yes, I do. MPlayer will play any Flash videos, with a bare minimum of resources, and fully supports multiple video output methods, like xv and gl.

The PROBLEM is that Flash videos aren't directly available anywhere... You have to parse through a SWF video player object to even determine where to FIND the URL of the actual FLV or MP4 file. And add to that extremely aggressive plugin detection scripts on many sites, which will refuse to even embed the SWF if you happen to have an unknown VERSION of the flash player. Unfortunately, I've mentioned this before, and got several interested replies, but nobody has thus far written a browser plug-in that will masquerade as Flash 10, and understand just enough SWF to find the URLs, and either present them to the users, or automatically pass them to MPlayer. A sad, sad failing, to be sure, since

B) I (and many, many others) care VASTLY more about Linux's support for massive storage arrays than we do for it's support of Flash, and other user-level fluff. My servers never need to visit YouTube... But booting from a hard drive more than 2 terabytes??? Don't expect Windows to let you do that, without very specialized hardware (EFI firmware). Linux, however, can do it out of the box with many common distros.

Re:Totally not ripped from a webcomic... (0)

Anonymous Coward | more than 3 years ago | (#32110292)

"We are working with Ubuntu and other partners to enable certification of Flash Player 10.1 for Linux on the Ubuntu 10.04 LTS release, an exciting release for Linux-based desktops and devices."

http://blogs.computerworld.com/16007/ubuntu_10_04_where_ubuntu_goes_from_here

pet-a-byte? (1)

jrivar59 (146428) | more than 3 years ago | (#32106884)

I'm not really sure how much a petabyte is. Could someone please translate to Natalie Portmans? or Station wagons full of congresses? or Rods to the Hogshead?

Re:pet-a-byte? (1)

fatalwall (873645) | more than 3 years ago | (#32108232)

dont quote me on it as im too tired to look it up but i believe a petabyte is 1000 terabytes... and last i checked thats like billions of rods of hogsheds worth of Natalie Portmans being used as station wagons full of congresses.

Re:pet-a-byte? (2, Informative)

SlothDead (1251206) | more than 3 years ago | (#32109820)

Tera -> Tetra -> 4 -> 1000^4
Peta -> Penta (like Pentagram) -> 5 -> 1000^5
Exa -> Hexa (like Hexagon) -> 6 -> 1000^6
Zeta -> Setta (like 7 in many languages) -> 7 -> 1000^7
Yotta -> Otta -> 8 -> 1000^8

Or use 1024 if you don't like IEEE/IEC norms...

Oh great (-1, Offtopic)

Anonymous Coward | more than 3 years ago | (#32106924)

Now whose wife is THIS one going to get killed?

Re:Oh great (0)

Anonymous Coward | more than 3 years ago | (#32108792)

This was a reference to ReiserFS.
A bad taste joke, but not offtopic.

Lustre (0)

Anonymous Coward | more than 3 years ago | (#32106954)

How is this different than Lustre?

"Enterprisey" design? Yet no scrubbing? (2, Interesting)

Hurricane78 (562437) | more than 3 years ago | (#32107018)

I see a lot too many layers over layers there. Which always smells like the inner-platform anti-pattern [wikipedia.org] that a “enterprise consultant” would to, to me.
But maybe I’m just misunderstanding things and that amount of layers is needed for large installations. Anyone here, who actually administers such large storage systems and read the article? Would be interesting to hear from someone with daily experience in this.

Also, I could not find any mentioning of any ZFS-like scrubbing going on. Which in my experience equals zero reliability at all with today’s unreliable drives. How would that system detect a controller creating corruption? Or data degradation? I had those problems. And they killed half my data. Despite having a RAID, doing automatic backups with verification and having a git-like history of changes (to protect from accidental overwriting). Nothing of that helped me at all.
Only constantly checking all data, and fixing them, before the errors become big enough for ECC to stop working, can prevent this.

Did I miss it, or did they really forget that crucial part?

Re:"Enterprisey" design? Yet no scrubbing? (2, Informative)

Anonymous Coward | more than 3 years ago | (#32108348)

Did I miss it, or did they really forget that crucial part?

You missed it. There is a scrubbing mechanism in ceph.

Linux® (2, Insightful)

The Yuckinator (898499) | more than 3 years ago | (#32107378)

The first word in the article summary is "Linux®"

Does that look weird to anyone else? I realize it's technically correct for the registered trademark symbol to be there, but somehow it just doesn't seem right.

Re:Linux® (2, Informative)

tomhudson (43916) | more than 3 years ago | (#32107704)

Definitely looks weird. I always write it in all-lowercase. But apparently the trademark is either all-caps ("LINUX®") or the standard capitalized form ("Linux®") [linuxmark.org]

Someone should remind them to register "linux®" (all lowercase), before Darl tries to. A capital first letter just doesn't look right.

How does this differ from glusterfs? (2, Interesting)

caffeinejolt (584827) | more than 3 years ago | (#32107664)

I am not real familiar with ceph and after going through the pain to learn more about glusterfs (http://www.gluster.org/) only to learn that gluster was not quite ready for primetime (this was about 6 month ago - may have changed), I am a bit skeptical. Anyone know the main differences between ceph and glusterfs (besides that glusterfs can run in userspace)?
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