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From Jon Haddad <...@jonhaddad.com>
Subject Re: New column
Date Thu, 22 Aug 2019 17:26:54 GMT
Just to close the loop on this, I did a release of tlp-stress last night,
which now has this workload (AllowFiltering).  You can grab a deb, rpm,
tarball or docker image.

Docs are here: http://thelastpickle.com/tlp-stress/

Jon

On Mon, Aug 19, 2019 at 2:21 PM Jon Haddad <jon@jonhaddad.com> wrote:

> It'll be about the same overhead as selecting the entire partition, since
> that's essentially what you're doing.
>
> I created a tlp-stress workload this morning but haven't merged it into
> master yet.  I need to do a little cleanup and I might tweak it a little,
> but if you're feeling adventurous you can build the branch yourself:
> https://github.com/thelastpickle/tlp-stress/tree/jon/106-allow-filtering-workload
>
> Once you do an in place build (./gradlew shadowJar), you'll probably want
> to do something like the following:
>
> bin/tlp-stress run AllowFiltering -p 1k -d 1h -r .5 --populate 1m
> --field.allow_filtering.payload='random(100,200)' --compaction lcs
>
> That's running against C* on my laptop.  Here's what all those arguments
> do:
>
> -p 1k # 1000 partitions
> -d 1h # run for 1 hour (-d = duration)
> -r .5  # (50% reads)
> --populate 1m # (pre populate with 1 million rows)
> --field.allow_filtering.payload='random(100,200)'  # use 100 - 200 bytes
> for the payload.  I assume there will be other data other than just the
> record, this will let you size each row accordingly
> --compaction lcs # use leveled compaction
>
> You can tweak the params as needed.  If you've got a cluster up, use the
> --host to point to it.    If you don't have a cluster up, you can spin one
> up in AWS in about 5-10 minutes using our tools:
> https://thelastpickle.com/tlp-cluster/
>
> Happy testing!
> Jon
>
>
> On Mon, Aug 19, 2019 at 1:23 PM Rahul Reddy <rahulreddy1234@gmail.com>
> wrote:
>
>> Jon,
>>
>> If we expect non of  our partition key to have more than 100 records and
>> pass partition key in where clause we wouldnt see issues using new column
>> and allow filtering?  Can you please point me to any doc how allow
>> filtering works. I was in assumption of it goes through all the partitions
>>
>>
>> On Sun, Aug 18, 2019, 4:33 PM Jon Haddad <jon@jonhaddad.com> wrote:
>>
>>> If you're giving the partition key you won't scan the whole table. The
>>> overhead will depend on the size or the partition.
>>>
>>> Would be an interesting workload for our tlp-stress tool, I'll code
>>> something up for the next release.
>>>
>>> On Sun, Aug 18, 2019, 12:58 PM Rahul Reddy <rahulreddy1234@gmail.com>
>>> wrote:
>>>
>>>> Hello,
>>>>
>>>> We have a table and want to add column and select based on existing
>>>> entire primary key plus new column using allow filtering. Since my where
>>>> clause has all the primary key + new column does the allow filtering scan
>>>> only the partions which are listed or does it has to scan whole table? What
>>>> is the best approach add new column and query it based on existing primary
>>>> key plus new column?
>>>>
>>>

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