I use HBase0.94 version, when reading data only index blocks are cached,
the data blocks are not cached, is right?  If right, why don't cache the
data blocks on read?
LiuLei,
Thanks.

Which 0.94 release are you using ?

Thanks

On Sat, Sep 8, 2012 at 8:15 AM, jlei liu <[EMAIL PROTECTED]> wrote:

> I use HBase0.94 version, when reading data only index blocks are cached,
> the data blocks are not cached, is right?  If right, why don't cache the
> data blocks on read?
>
>
> LiuLei,
> Thanks.
>

Hbase0.94.1 version.

I read the HFileReaderV2.readBlock code again,when I set
HColumnDescriptor.setBlockCacheEnabled is true,
data blocks and index block are all cached, if  I  set
HColumnDescriptor.setBlockCacheEnabled is false,
only  index blocks are cached, that right?

2012/9/9 Ted Yu <[EMAIL PROTECTED]>

> Which 0.94 release are you using ?
>
> Thanks
>
> On Sat, Sep 8, 2012 at 8:15 AM, jlei liu <[EMAIL PROTECTED]> wrote:
>
> > I use HBase0.94 version, when reading data only index blocks are cached,
> > the data blocks are not cached, is right?  If right, why don't cache the
> > data blocks on read?
> >
> >
> > LiuLei,
> > Thanks.
> >
>

That's right.
Please note the default value for this parameter:

  public static final boolean DEFAULT_BLOCKCACHE = true;
On Sat, Sep 8, 2012 at 9:37 AM, jlei liu <[EMAIL PROTECTED]> wrote:

> Hbase0.94.1 version.
>
> I read the HFileReaderV2.readBlock code again,when I set
> HColumnDescriptor.setBlockCacheEnabled is true,
> data blocks and index block are all cached, if  I  set
> HColumnDescriptor.setBlockCacheEnabled is false,
> only  index blocks are cached, that right?
>
> 2012/9/9 Ted Yu <[EMAIL PROTECTED]>
>
> > Which 0.94 release are you using ?
> >
> > Thanks
> >
> > On Sat, Sep 8, 2012 at 8:15 AM, jlei liu <[EMAIL PROTECTED]> wrote:
> >
> > > I use HBase0.94 version, when reading data only index blocks are
> cached,
> > > the data blocks are not cached, is right?  If right, why don't cache
> the
> > > data blocks on read?
> > >
> > >
> > > LiuLei,
> > > Thanks.
> > >
> >
>