Re: [infinispan-dev] DIST and putAll calls
On 8 Jul 2009, at 16:13, Galder Zamarreno wrote:
Hi,
Re: https://jira.jboss.org/jira/browse/ISPN-120
While looking at this, I've started thinking how DIST dealt with
putAll() calls. It looks, based on
MultipleKeysRecipientGenerator.generateRecipients() that there's a
union made of all the recipients for all the keys in the putAll().
Is that how's that supposed to work?
Theoretically, it looks to me there should be a put op called for
each of the keys but obviously, doing the current way is more
performant in spite of creating more copies in the cluster than the
number of owners set.
Well there will always be a tradeoff. And that tradeoff will depend
on a number of factors, including the size of the map passed to putAll
and the degree of overlap in entry colocation. If we know we have a
low degree of overlap it may make sense to break up the map; but if
the map is small it may be cheaper/quicker to just let everyone have
the map and discard what they don't need.
Cheers
--
Manik Surtani
manik(a)jboss.org
Lead, Infinispan
Lead, JBoss Cache
http://www.infinispan.org
http://www.jbosscache.org