[rabbitmq-discuss] if stop RabbitMq Server Service, the Server try to create 'queues' folder ?
ceri at lshift.net
Thu Oct 17 13:34:18 BST 2013
(17/10/13 11:24), Tim Watson wrote:
> On 17 Oct 2013, at 10:58, 3k4b251 wrote:
>> Thank you ! I think it's a good idea, but I still confuse about
>> the druable queues. Must Mq Server create floders for every druable
>> queue in 'queues' ?
> Is the creation of folders in the internal database causing you a problem?
I'd infer that he's maybe referring to the fact that traditionally,
having lots of entires in a single directory will cause accesses to
items in that directory to perform very poorly (even to the point of
causing significant performance problems for the machine overall). If
you fancy seeing this in practice, try creating ~10,000,000-100,000,000
entries in a directory on ext4 (ideally on a sacraficial machine).
The usual solution (usually found in mail transport agents like Exim/
Postfix) to this is to use "hashed" directories, where instead of having
directories named as follows:
So that the scan of each directory encounters far fewer items, making
the performance more logarithmic than linear.
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