Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Threaded View
MapReduce >> mail # dev >> dynamic configuration changes


Copy link to this message
-
Re: dynamic configuration changes
I logged:
https://issues.apache.org/jira/browse/HADOOP-7319

Please comment so that I get to know what I might have missed.

Thanks

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.
>
> Cheers
>
>
> On Fri, May 20, 2011 at 4:41 PM, Ted Yu <[EMAIL PROTECTED]> wrote:
>
>> Hi,
>> 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
>> getReconfigurableProperties().
>>
>> Thanks
>>
>
>