On Fri, Jan 17, 2014 at 2:05 AM, Christian Balzer <[email protected]> wrote:
> On Thu, 16 Jan 2014 15:51:17 +0200 Ilya Dryomov wrote:
>
>> On Wed, Jan 15, 2014 at 5:42 AM, Sage Weil <[email protected]> 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.
Thanks,
Ilya
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