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Date: Sun, 15 May 2016 17:09:14 -0700
Message-ID: <CADcMMgH=1i7FdN=qSjFVqn9=iUgxRoE9vev+7PGdZR_Eo0xhyA@mail.gmail.com>
Subject: Re: hbase block and columnfamily of a row
From: Stack <stack@duboce.net>
To: Hbase-User <user@hbase.apache.org>
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archived-at: Mon, 16 May 2016 00:09:20 -0000

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On Sat, May 14, 2016 at 10:46 PM, Shushant Arora <shushantarora09@gmail.com>
wrote:

> can a hbase table with single column family hve its row spawned on
>  multiple blocks in a same HFile ?
>
>
Yes. A row could have many entries in it.. too many for a single block.


> Suppose there is only one hfile in that case is it possile a column family
> having 5-6 columns is spawned on multiple blocks ? or its always block is
> closed at max( 64k default or when all columns of a columnfamily for a
> single row fits in that block).
>
>
It is possible. It is usual in fact.

At an extreme a single entry/Cell could fill a whole block if it were 64k
or bigger in size. A single Cell will never span blocks.

A block is completed as soon as it exceeds the configured block size.
Blocks are rarely exactly 64k in size.

St.Ack


> Thanks!
>

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