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Posted to user@hbase.apache.org by Shushant Arora <sh...@gmail.com> on 2016/05/15 12:05:14 UTC
hfile v2 and bloomfilter
In Hfile v2 block level blommfilters are stored inb scanned section along
with data block and leaf index.
Load on open section contains bloomfilter data . Whats this bloom filter
data?
1.Does it contains index of bloomchunks stored in scanned section ?
2.What does meta blocks of non scanned section contains.
3.Does leaf level index contains row keys only? Will having tall table vs
wide table affect the size of leaf index.
Thanks!
Re: hfile v2 and bloomfilter
Posted by Jerry He <je...@gmail.com>.
Another good place to look at is the design doc attached to the HFile v2
JIRA:
https://issues.apache.org/jira/browse/HBASE-3857
Jerry
On Sun, May 15, 2016 at 5:12 PM, Stack <st...@duboce.net> wrote:
> On Sun, May 15, 2016 at 5:05 AM, Shushant Arora <shushantarora09@gmail.com
> >
> wrote:
>
> > In Hfile v2 block level blommfilters are stored inb scanned section along
> > with data block and leaf index.
> >
> > Load on open section contains bloomfilter data . Whats this bloom filter
> > data?
> >
>
> To what are you referring to when you say 'on open section'?
>
>
> > 1.Does it contains index of bloomchunks stored in scanned section ?
> > 2.What does meta blocks of non scanned section contains.
> > 3.Does leaf level index contains row keys only? Will having tall table vs
> > wide table affect the size of leaf index.
> >
> >
> You might be better off reading the code. Have you tried? You'd get a more
> trustworthy answer (smile).
>
> St.Ack
>
>
>
> > Thanks!
> >
>
Re: hfile v2 and bloomfilter
Posted by Stack <st...@duboce.net>.
On Sun, May 15, 2016 at 5:05 AM, Shushant Arora <sh...@gmail.com>
wrote:
> In Hfile v2 block level blommfilters are stored inb scanned section along
> with data block and leaf index.
>
> Load on open section contains bloomfilter data . Whats this bloom filter
> data?
>
To what are you referring to when you say 'on open section'?
> 1.Does it contains index of bloomchunks stored in scanned section ?
> 2.What does meta blocks of non scanned section contains.
> 3.Does leaf level index contains row keys only? Will having tall table vs
> wide table affect the size of leaf index.
>
>
You might be better off reading the code. Have you tried? You'd get a more
trustworthy answer (smile).
St.Ack
> Thanks!
>