On Fri, Jan 17, 2014 at 11:20 AM, Ilya Dryomov <ilya.dryomov@xxxxxxxxxxx> wrote:
> On Fri, Jan 17, 2014 at 2:05 AM, Christian Balzer <chibi@xxxxxxx> wrote:
>> On Thu, 16 Jan 2014 15:51:17 +0200 Ilya Dryomov wrote:
>>
>>> On Wed, Jan 15, 2014 at 5:42 AM, Sage Weil <sage@xxxxxxxxxxx> wrote:
>>> >
>>> > [...]
>>> >
>>> > * rbd: support for 4096 mapped devices, up from ~250 (Ilya Dryomov)
>>>
>>> Just a note, v0.75 simply adds some of the infrastructure, the actual
>>> support for this will arrive with kernel 3.14. The theoretical limit
>>> is 65536 mapped devices, although I admit I haven't tried mapping more
>>> than ~4000 at once.
>>>
>> Just for clarification, this is for the client side when using the kernel
>> module, right?
>>
>> Not looking at more than about 150 devices per compute node now, but that
>> might change and there is also the case of failovers...
>
> Yes, this is how many 'rbd map ...'s a single rbd kernel module (and
> therefore a single compute node) can handle. Kernels 3.13 and below
> can handle ~130-150, depending on the machine.
Sorry, typoed. ~230-250.
Thanks,
Ilya
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