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From: Lars George <lars.george@gmail.com>
Date: Tue, 21 Jun 2016 15:46:30 +0200
Message-ID: <CAJL+TUTt2bTx_mzocJtQtZ8mJbpNQQPYnGnt+ELbD+prWYfUdw@mail.gmail.com>
Subject: Re: MutableQuantiles
To: "dev@hbase.apache.org" <dev@hbase.apache.org>
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archived-at: Tue, 21 Jun 2016 13:46:41 -0000

Hi Elliott,

I was referring to MutableQuantiles vs MetricsMutableQuantiles. The
Histogram ones are cleaned up as you say and I saw. But what about the
former pair?

Lars

On Mon, Jun 20, 2016 at 7:13 PM, Elliott Clark <eclark@apache.org> wrote:
> MetricMutableHistogram and all ( The classes which were ports of hadoop's
> classes) have been removed. They are no longer used.  However the ones
> hadoop supplies were very slow so instead we use MutableHistogram.
>
> See:  HBASE-15222
>
> On Mon, Jun 20, 2016 at 5:19 AM, Lars George <lars.george@gmail.com> wrote:
>
>> BTW, I am looking at 1.2 branch, though here the Hadoop one does
>> exactly the same as what the HBase one does. Where do I see the
>> difference? Master looks the same too. Are you referring to the
>> histogram classes?
>>
>> On Mon, Jun 20, 2016 at 1:36 PM, Lars George <lars.george@gmail.com>
>> wrote:
>> > Ah thanks Andy. It seemed mostly a copy (with some internal
>> > modification). Now, where is that used at all?
>> >
>> > On Sun, Jun 19, 2016 at 7:06 PM, Andrew Purtell
>> > <andrew.purtell@gmail.com> wrote:
>> >> We have additional functionality that the Hadoop supplied one does not,
>> importantly the ability to dump counts by latency bucket rather than
>> percentile measures at the moment. The former can be used to calculate
>> mathematically meaningful percentile measures over the whole fleet and over
>> longer timescales, the latter cannot.
>> >>
>> >>
>> >>> On Jun 19, 2016, at 9:36 AM, Lars George <lars.george@gmail.com>
>> wrote:
>> >>>
>> >>> Hi,
>> >>>
>> >>> As per https://issues.apache.org/jira/browse/HBASE-6409 we rolled our
>> >>> own class. Is that still needed? Since 2012 lot's has changed and we
>> >>> should have all in place to use the Hadoop supplied one?
>> >>>
>> >>> Just curious.
>> >>>
>> >>> Cheers,
>> >>> Lars
>>