our suggestion.
> But since MemStore and BlockCache is separately managed on each column
> family, I'm a little concerned with the memory footprint.
>
> Thank you.
>
> -Original Message-
> From: Qiang Tian [mailto:tian...@gmail.com]
> Sent: Thursday, August 07, 2014 11:4
sential, except for SingleColumnValueFilter.
>
> Thanks.
>
> -Original Message-----
> From: Ted Yu [mailto:yuzhih...@gmail.com]
> Sent: Thursday, August 07, 2014 12:38 PM
> To: user@hbase.apache.org
> Subject: Re: Question on the number of column families
>
> bq. Wh
Sent: Thursday, August 07, 2014 11:43 AM
To: user@hbase.apache.org
Subject: Re: Question on the number of column families
Hi,
the description of hbase-5416 stated why it was introduced, if you only have 1
CF, dummy CF does not help. it is helpful for multi-CF case, e.g. "putting them
in
riginal Message-----
> From: innowireless TaeYun Kim [mailto:taeyun@innowireless.co.kr]
> Sent: Wednesday, August 06, 2014 1:48 PM
> To: user@hbase.apache.org
> Subject: RE: Question on the number of column families
>
> Thank you.
>
> The 'dummy' column will alwa
es ahead. So sorry for my premature thoughts)
>
>
> -Original Message-
> From: Ted Yu [mailto:yuzhih...@gmail.com]
> Sent: Wednesday, August 06, 2014 1:38 PM
> To: user@hbase.apache.org
> Subject: Re: Question on the number of column families
>
> bq. add a 'dummy' c
my' column family can be used to minimize the scan cost.
>
> Thank you.
>
>
> -Original Message-----
> From: innowireless TaeYun Kim [mailto:taeyun@innowireless.co.kr]
> Sent: Wednesday, August 06, 2014 1:48 PM
> To: user@hbase.apache.org
> Subject: RE: Question on the numbe
innowireless TaeYun Kim [mailto:taeyun@innowireless.co.kr]
Sent: Wednesday, August 06, 2014 1:48 PM
To: user@hbase.apache.org
Subject: RE: Question on the number of column families
Thank you.
The 'dummy' column will always hold the value '1' (or even an empty string),
r@hbase.apache.org
Subject: Re: Question on the number of column families
bq. add a 'dummy' column family and apply HBASE-5416 technique
Adding dummy column family is not the way to utilize essential column family
support - what would this dummy column family hold ?
bq. since I have not re
bq. add a 'dummy' column family and apply HBASE-5416 technique
Adding dummy column family is not the way to utilize essential column
family support - what would this dummy column family hold ?
bq. since I have not read the filtering section of the book I'm reading yet
Once you finish reading, yo
Thank you all.
Facts learned:
- Having 130 column families is too much. Don't do that.
- While scanning, an entire row will be read for filtering, unless HBASE-5416
technique is applied which makes only relevant column family is loaded. (But it
seems that still one can't load just a column need
One way to model the data would be to use a composite key that is made
up of the RDMS primary_key + "." + field_name. Then just have a single
column that contains the value of the field.
Individual field lookups will be a simple get and to get all of fields
of a record, you would do a scan with sta
s somewhat related to the size of the
>>> client screen that displays the values on a map.
>>> Normally a client requests the values for the area that is displayed on
>>> the screen.
>>>
>>>
>>> -Original Message-
>>> From: Alo
essage-
> > From: innowireless TaeYun Kim [mailto:taeyun....@innowireless.co.kr]
> > Sent: Tuesday, August 05, 2014 8:36 PM
> > To: user@hbase.apache.org
> > Subject: RE: Question on the number of column families
> >
> > Thank you for your reply.
> >
> >
is somewhat related to the size of the
> client screen that displays the values on a map.
> Normally a client requests the values for the area that is displayed on
> the screen.
>
>
> -Original Message-
> From: Alok Kumar [mailto:alok...@gmail.com]
> Sent: Tuesday, Aug
block
cache, unless the columns are separated by individual column family.
-Original Message-
From: innowireless TaeYun Kim [mailto:taeyun@innowireless.co.kr]
Sent: Tuesday, August 05, 2014 8:36 PM
To: user@hbase.apache.org
Subject: RE: Question on the number of column families
Than
uests the values for the area that is displayed on the
screen.
-Original Message-
From: Alok Kumar [mailto:alok...@gmail.com]
Sent: Tuesday, August 05, 2014 8:24 PM
To: user@hbase.apache.org
Subject: Re: Question on the number of column families
Hi,
Hbase creates HFile per column-f
5, 2014 8:11 PM
> To: user@hbase.apache.org
> Subject: Question on the number of column families
>
> Hi,
>
>
>
> According to http://hbase.apache.org/book/number.of.cfs.html, having more
> than 2~3 column families are strongly discouraged.
>
>
>
> BTW, in my case, re
To: user@hbase.apache.org
Subject: Question on the number of column families
Hi,
According to http://hbase.apache.org/book/number.of.cfs.html, having more
than 2~3 column families are strongly discouraged.
BTW, in my case, records on a table have the following characteristics:
- The
Hi,
According to http://hbase.apache.org/book/number.of.cfs.html, having more
than 2~3 column families are strongly discouraged.
BTW, in my case, records on a table have the following characteristics:
- The table is read-only. It is bulk-loaded once. When a new data is ready,
A new tabl
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