-Re: dynamic configuration changes
Ted Yu 2011-05-23, 21:58
Please comment so that I get to know what I might have missed.
On Fri, May 20, 2011 at 10:44 PM, Ted Yu <[EMAIL PROTECTED]> wrote:
> The two properties cited below would ideally be updated atomically,
> requiring some kind of locking.
> One more reason for coarse-grained property reconfig is that it can reduce
> lock contention updating related properties.
> On Fri, May 20, 2011 at 4:41 PM, Ted Yu <[EMAIL PROTECTED]> wrote:
>> We're looking at extending the work done in HADOOP-7001 to HBase.
>> I want to get opinion on providing coarse-grained property reconfig
>> mechanism. Namely reconfigureProperty()/reconfigurePropertyImpl() only
>> notifies single property change.
>> Normally a class would be interested in more than one reconfigurable
>> property. e.g.
>> String hostname = DNS.getDefaultHost(
>> conf.get("hbase.master.dns.interface", "default"),
>> conf.get("hbase.master.dns.nameserver", "default"));
>> I wonder if it is useful to enhance the methods to notify multiple
>> property changes - more precisely the properties returned by