Re: terrible read/write latency fluctuation

[曹志富]

Thanks all of u.

--
Ranger Tsao

2015-10-30 18:25 GMT+08:00 Anishek Agarwal :

> if its some sort of timeseries DTCS might turn out to be better for
> compaction. also some disk monitoring might help to understand if disk is
> the bottleneck.
>
> On Sun, Oct 25, 2015 at 3:47 PM, 曹志富  wrote:
>
>> I will try to trace a read that take > 20msec
>> .
>>
>> just HDD.no delete just 60days ttl.value size is small ,max length is 140.
>>
>>
>> My data like Time Series . date of 90% reads which timestamp < 7days.
>> data almost just insert ,with a lit update.
>>
>
>

Re: terrible read/write latency fluctuation

[Anishek Agarwal]

if its some sort of timeseries DTCS might turn out to be better for
compaction. also some disk monitoring might help to understand if disk is
the bottleneck.

On Sun, Oct 25, 2015 at 3:47 PM, 曹志富  wrote:

> I will try to trace a read that take > 20msec
> .
>
> just HDD.no delete just 60days ttl.value size is small ,max length is 140.
>
>
> My data like Time Series . date of 90% reads which timestamp < 7days.
> data almost just insert ,with a lit update.
>

Re: terrible read/write latency fluctuation

[曹志富]

I will try to trace a read that take > 20msec
.

just HDD.no delete just 60days ttl.value size is small ,max length is 140.


My data like Time Series . date of 90% reads which timestamp < 7days. data
almost just insert ,with a lit update.