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From Matija Gobec <matija0...@gmail.com>
Subject Re: too many compactions pending and compaction is slow on few tables
Date Fri, 07 Apr 2017 19:18:38 GMT
It does as the "new" data, even if the values are the same, has new write
time timestamp.
Spinning disks are hard to run LCS on. Do you maybe have some kind of non
stripe raid in place?

On Fri, Apr 7, 2017 at 8:46 PM, Giri P <gpatcham@gmail.com> wrote:

> Does LCS try compacting already compacted files if it see same key loaded
> again ?
>
> On Fri, Apr 7, 2017 at 11:39 AM, Giri P <gpatcham@gmail.com> wrote:
>
>> cassandra version : 2.1
>> volume : initially loading 28 days worth of data around 1 TB and then we
>>  process hourly
>> load: only cassandra running on nodes
>> disks: spinning disks
>>
>>
>>
>> On Fri, Apr 7, 2017 at 11:27 AM, Jonathan Haddad <jon@jonhaddad.com>
>> wrote:
>>
>>> What version of Cassandra? How much data? How often are you reloading
>>> it? Is compaction throttled? What disks are you using? Any other load on
>>> the machine?
>>> On Fri, Apr 7, 2017 at 11:19 AM Giri P <gpatcham@gmail.com> wrote:
>>>
>>>> Hi,
>>>>
>>>> we are continuously loading a table which has properties properties
>>>> compaction strategy LCS and bloom filter off and compactions are not
>>>> catching up . Even the compaction is running slow on that table even after
>>>> we increases throughput and concurrent compactors.
>>>>
>>>> Can someone point me to what I should be looking to tune this ?
>>>>
>>>> Thanks
>>>> Giri
>>>>
>>>
>>
>

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