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From James Taylor <jamestay...@apache.org>
Subject Re: How to tell when an insertion has "finished"
Date Thu, 28 Jul 2016 22:48:11 GMT
I believe you can also measure the depth of the replication queue to know
what's pending. HBase replication is asynchronous, so you're right that
Phoenix would return while replication may still be occurring.

On Thu, Jul 28, 2016 at 12:06 PM, Mujtaba Chohan <mujtaba@apache.org> wrote:

> Query running first time would be slower since data is not in HBase cache
> rather than things being not settled. Replication shouldn't be putting load
> on cluster which you can check by turning replication off. On HBase side to
> force things to be optimal before running perf queries is to do a major
> compaction and wait for compaction to complete.
>
> - mujtaba
>
> On Thu, Jul 28, 2016 at 8:09 AM, Heather, James (ELS) <
> james.heather@elsevier.com> wrote:
>
>> If you upsert lots of rows into a table, presumably Phoenix will return
>> as soon as HBase has received the data, but before the data has been
>> replicated?
>>
>>
>> Is there a way to tell when everything has "settled", i.e., when
>> everything has finished replicating or whatever it needs to do?
>>
>>
>> The reason I ask is that this might affect our benchmarking. If we add
>> lots of rows, and then run some sample queries straight away, they might
>> return more slowly initially, if the replication is still taking place.
>>
>>
>> (Does this make sense? I'm not completely clear on how HBase replication
>> works anyway.)
>>
>>
>> James
>>
>> ------------------------------
>>
>> Elsevier Limited. Registered Office: The Boulevard, Langford Lane,
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>> Registered in England and Wales.
>>
>
>

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