Ceph CDS Hammer, 29 Oct 2014

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From YouTube: CDS Hammer (Day 2) - RBD: Copy-on-Read for Clones in Kernel RBD Clients

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http://goo.gl/U4b70r

29 October 2014
Ceph Developer Summit: Hammer
Day 2
RBD: Copy-on-Read for Clones in Kernel RBD Clients
Min Chen, Li Wang, Ilya Dyomov

A

All right, second and last, one here, we're in the home stretch I've still with rbd we're looking at the the copy, I readings for clones in the kernel, our Beauty clients. This was min chen and lee wine want to give us a overview of what you had for the blueprint.

B

Yes, all right so.

C

Chrome just told me that the pad set Khan was a phishing website.

A

Yeah it's based almost entirely on the URL. We had that earlier for the security one as well. All.

C

Right or report, it's an incorrect warning, yeah.

A

We did that too, and that's how we found out that it was just because it said certain things in the URL.

A

Right men go ahead and take it away.

B

We have laptop and Scott in the soccer before the best idea. The exam.

B

We have missed an algorithm agreement, implementation in the public, a photo of the red so I. I just described it again. First, we need to spend the child object before the code. We don't know repeating it days are not usually.

B

Give your winning Jared and which we will have any. We haven't flatten it and at the channel that we are not only did so Oh with the kind will stand and send democratic to its parent in eternal, are the kind and the function RVD in the object, because some media persons or stained.

B

When you can read the object from the parent, this is saved it calm, it seems content in memory and and we are ready to Ireland.

B

So when we write it in secretary success for that card, only and actually it's over.

D

B

So just this all japan.

B

A

B

I love that they're dead, I proclaimed object map and it's a useful Oh to commemorate just.

D

Yes, okay, it's a useful in the same way that I can read that it would be to know a cockhead right gmail to tell um which I'll just exist already or not and optimize the process tightly by being able to tell you, but when I parent obvious exists, you can go and meet them really, instead of chatting to go, go through an extra round trip tomatoes.

D

There's no rock, as I'm added risk of the front of the line like her client at all. Yet so you can hands kind of separate it can be, it can be useful. Is there with me adapter can be there Q, so they can think irregular. There's no dependency. I.

D

Think that a basic structure makes sense and the distant add methods need to keep track of the outstanding requests similar to wait in user space and make sure makes it tougher, like my Suede's, for all those with any requests to be completed for its quick. It's closed, there's always some reference consulate. Anything you some cookies for that.

C

Keep happening.

D

Yeah yeah you rent.

E

D

Give any thoughts for this.

E

Well, there hasn't much changed since the last CD s in those paths which I was busy with bugs there was. There was not much progress, I'm hearing a horrible heck. Oh it's better! So the there wasn't much progress with the fancy. Striping sell the paths pretty much the same. We merge discard that changed a few things, but logically everything's the same. So what we discussed last time, o Sole applies.

E

As far as waiting for requests to finish, that I think that may require some thought, because we don't we don't even do it for rights properly. As far as far as I can tell so, I.

D

Think we can directly and now the chicken when that this will reference to the device. Don't we.

E

Well, yes, but but that mechanism is I I, think it's not entirely. Yes, for example. Well, it's it sort of works, but, for example, in refresh there is no way to handle errors and refresh.

E

So we can just stop by oh and in general, would be nice to have to separate them the two things, so it would nice to be able to stop by oh without unwrapping an image that will allow us to handle errors, and refresh that will also open up should is basically be a lot simpler and oh, that's something that perhaps could have been done alongside, but let's totally separate from cocky and redo. So we should just submit the patches and see how it goes.

D

Don't make sense to me, I mean: do you have any questions.

B

B

B

Can there a plan to anything covered in you? Can panel Abby, Lee.

B

The call because.

B

Because are you plan to.

B

Do you use the object, Matt.

E

Josh yeah go ahead.

D

And I'm the kind of disrepair different purposes and like copy me lets you flatten image while you're eating it to say bio and my face between. Is you Chris but um where's? I start I just messaged. You read more and enter malayo more efficiently or efficiently, but I see this kind of two different purposes, so it makes sense to automatic and.

E

Let's try is the colonel implementation, I think the user space implementation hasn't been merged, so there the pull request referenced in the in the blueprint is the old one. There was a little one from September from september's something and I would really like to see it merged because otherwise I can't validate so the first thing, for you would be to push the user space pool request, so it's merged and because otherwise I'll have a hard time. Are you colonel patches?

E

C

Is that what is the status of the review on the database? One Josh? We.

E

The conversation has 0 comments, no.

C

D

I forget it then, but I think I might still be some logistics up at the fantasy. I can push them out of the campus, but it's real comfy.

C

Yeah, okay, I mean I had caught the second suit, there's a previous one, but fall especially.

E

If it relates to defensive striping, it needs to be merged in the user speech first, because there's two likely going to race I want to finally sit down and start working on it because it's been going on for a long while it really needs to be merged in the user space before before, I can record submit it to the crow.

C

Yep, I think that's that's. That's mostly just touch right. I think minutes mythical badges I thought the balls that balls in our Court yeah.

D

I'm, sorry, it's been seen there for a while. It's been lots of things going on personally, I am.

C

Fat yeah, yes,.

C

um Okay, I just 11, really quit touching, really quick question when the the cop Henry is triggered, the original read will proceed as normal, but then immediately behind it there's a cop. Yet all that works yeah.

D

Is that okay, it's cool to the composition, is.

C

C

A

And it for this one so.

C

D