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From Ted Yu <yuzhih...@gmail.com>
Subject Re: Prefetching Indexes of HFiles
Date Thu, 24 Sep 2015 21:13:47 GMT
I think the option you mentioned is for data blocks.

As for index blocks, please refer to HFile V2 design doc.
Also see this:


On Thu, Sep 24, 2015 at 1:16 PM, Anthony Nguyen <anthony.an.nguyen@gmail.com
> wrote:

> Hi all,
> Is there a better way to warm HFile indexes other than scanning through my
> datasets? I did see PREFETCH_BLOCKS_ON_OPEN, but the warning that it "is
> not a good idea if the data to be preloaded will not fit into the
> blockcache" makes me wary. Why would this be a bad idea?
> Thanks!

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