Dear All,

In the description it mentions that a Store file (per column family)
is composed of one memstore and a set of HFiles. Does it imply that
for every column family there is a corresponding memstore? For
example. if a table has 2 column families, there will be 2 memstores
in memory?

regards!

Yong

Yes, there will be two memstores if you have two CFs.
On Oct 22, 2012 7:25 AM, "yonghu" <[EMAIL PROTECTED]> wrote:

> Dear All,
>
> In the description it mentions that a Store file (per column family)
> is composed of one memstore and a set of HFiles. Does it imply that
> for every column family there is a corresponding memstore? For
> example. if a table has 2 column families, there will be 2 memstores
> in memory?
>
> regards!
>
> Yong
>

To be precise there will be one memstore per family per region..
If table having 2 CFs and there are 10 regions for that table then totally 2*10=20 memstores..

-Anoop-
________________________________________
From: Kevin O'dell [[EMAIL PROTECTED]]
Sent: Monday, October 22, 2012 5:55 PM
To: [EMAIL PROTECTED]
Subject: Re: A question of storage structure for memstore?

Yes, there will be two memstores if you have two CFs.
On Oct 22, 2012 7:25 AM, "yonghu" <[EMAIL PROTECTED]> wrote:

> Dear All,
>
> In the description it mentions that a Store file (per column family)
> is composed of one memstore and a set of HFiles. Does it imply that
> for every column family there is a corresponding memstore? For
> example. if a table has 2 column families, there will be 2 memstores
> in memory?
>
> regards!
>
> Yong
>

Thanks for your responses.

yong
On Mon, Oct 22, 2012 at 3:05 PM, Anoop Sam John <[EMAIL PROTECTED]> wrote:
> To be precise there will be one memstore per family per region..
> If table having 2 CFs and there are 10 regions for that table then totally 2*10=20 memstores..
>
> -Anoop-
> ________________________________________
> From: Kevin O'dell [[EMAIL PROTECTED]]
> Sent: Monday, October 22, 2012 5:55 PM
> To: [EMAIL PROTECTED]
> Subject: Re: A question of storage structure for memstore?
>
> Yes, there will be two memstores if you have two CFs.
> On Oct 22, 2012 7:25 AM, "yonghu" <[EMAIL PROTECTED]> wrote:
>
>> Dear All,
>>
>> In the description it mentions that a Store file (per column family)
>> is composed of one memstore and a set of HFiles. Does it imply that
>> for every column family there is a corresponding memstore? For
>> example. if a table has 2 column families, there will be 2 memstores
>> in memory?
>>
>> regards!
>>
>> Yong
>>