MAX_RBD_IMAGES

MAX_RBD_IMAGES

[Shinobu Kinjo]

Hello,

Does any of you know why *MAX_RBD_IMAGES* was changed from 16 to 128?
I hope that Dan remember -;

http://resources.ustack.com/ceph/ceph/commit/2a6dcabf7f1b7550a0fa4fd223970ffc24ad7870

 - Shinobu

Re: MAX_RBD_IMAGES

[Josh Durgin]

On 09/22/2015 02:55 PM, Shinobu Kinjo wrote:
> Hello,
>
> Does any of you know why *MAX_RBD_IMAGES* was changed from 16 to 128?
> I hope that Dan remember -;
>
> http://resources.ustack.com/ceph/ceph/commit/2a6dcabf7f1b7550a0fa4fd223970ffc24ad7870

I don't think there's a reason for the exact limit. rbd-fuse was
created as a prototype, and hasn't had much work on it since. A
hardcoded limit on open images is not necessary, for example. Some
more ideas for improvements if anyone's interested:

http://pad.ceph.com/p/rbd-fuse-2015

Josh

Re: MAX_RBD_IMAGES

[Shinobu Kinjo]

> I don't think there's a reason for the exact limit. rbd-fuse was
> created as a prototype, and hasn't had much work on it since.

That's why I've ended up with asking. I've spent 2 days to find out any reason -;
The kernel says nothing to me, of course.
Thank you.

 Shinobu

----- Original Message -----
From: "Josh Durgin" <jdurgin@redhat.com>
To: "Shinobu Kinjo" <skinjo@redhat.com>, "ceph-devel" <ceph-devel@vger.kernel.org>
Sent: Wednesday, September 23, 2015 7:42:29 AM
Subject: Re: [CEPH-DEVEL] MAX_RBD_IMAGES

On 09/22/2015 02:55 PM, Shinobu Kinjo wrote:
> Hello,
>
> Does any of you know why *MAX_RBD_IMAGES* was changed from 16 to 128?
> I hope that Dan remember -;
>
> http://resources.ustack.com/ceph/ceph/commit/2a6dcabf7f1b7550a0fa4fd223970ffc24ad7870

I don't think there's a reason for the exact limit. rbd-fuse was
created as a prototype, and hasn't had much work on it since. A
hardcoded limit on open images is not necessary, for example. Some
more ideas for improvements if anyone's interested:

http://pad.ceph.com/p/rbd-fuse-2015

Josh
--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: MAX_RBD_IMAGES

[Dan Mick]

On 09/22/2015 02:55 PM, Shinobu Kinjo wrote:
> Hello,
> 
> Does any of you know why *MAX_RBD_IMAGES* was changed from 16 to 128?
> I hope that Dan remember -;
> 
> http://resources.ustack.com/ceph/ceph/commit/2a6dcabf7f1b7550a0fa4fd223970ffc24ad7870
> 
>  - Shinobu
> --
> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

to....have more of them?

-- 
Dan Mick
Red Hat, Inc.
Ceph docs: http://ceph.com/docs

Re: MAX_RBD_IMAGES

[Shinobu Kinjo]

I just want to know what that number means.

Based on the Linux kenel, that number doesn't make sense but, for the Ceph cluster, would make sense from performance, resource handling including networking resource point of views.

So, do you remember?

Shinobu

----- Original Message -----
From: "Dan Mick" <dmick@redhat.com>
To: "Shinobu Kinjo" <skinjo@redhat.com>, "ceph-devel" <ceph-devel@vger.kernel.org>
Sent: Wednesday, September 30, 2015 9:04:35 AM
Subject: Re: [CEPH-DEVEL] MAX_RBD_IMAGES

On 09/22/2015 02:55 PM, Shinobu Kinjo wrote:
> Hello,
> 
> Does any of you know why *MAX_RBD_IMAGES* was changed from 16 to 128?
> I hope that Dan remember -;
> 
> http://resources.ustack.com/ceph/ceph/commit/2a6dcabf7f1b7550a0fa4fd223970ffc24ad7870
> 
>  - Shinobu
> --
> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

to....have more of them?

-- 
Dan Mick
Red Hat, Inc.
Ceph docs: http://ceph.com/docs

Re: MAX_RBD_IMAGES

[Dan Mick]

Doesn't mean anything.  It was just a medium-large number of emulated
targets.  The choice had nothing to do with the kernel.

On 09/29/2015 08:58 PM, Shinobu Kinjo wrote:
> I just want to know what that number means.
> 
> Based on the Linux kenel, that number doesn't make sense but, for the Ceph cluster, would make sense from performance, resource handling including networking resource point of views.
> 
> So, do you remember?
> 
> Shinobu
> 
> ----- Original Message -----
> From: "Dan Mick" <dmick@redhat.com>
> To: "Shinobu Kinjo" <skinjo@redhat.com>, "ceph-devel" <ceph-devel@vger.kernel.org>
> Sent: Wednesday, September 30, 2015 9:04:35 AM
> Subject: Re: [CEPH-DEVEL] MAX_RBD_IMAGES
> 
> On 09/22/2015 02:55 PM, Shinobu Kinjo wrote:
>> Hello,
>>
>> Does any of you know why *MAX_RBD_IMAGES* was changed from 16 to 128?
>> I hope that Dan remember -;
>>
>> http://resources.ustack.com/ceph/ceph/commit/2a6dcabf7f1b7550a0fa4fd223970ffc24ad7870
>>
>>  - Shinobu
>> --
>> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
> 
> to....have more of them?
>