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HBase, mail # user - lookup table


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Re: lookup table
Stack 2012-09-16, 22:16
On Sat, Sep 15, 2012 at 8:09 AM, Rita <[EMAIL PROTECTED]> wrote:
> I am debating if a lookup table would help my situation.
>
> I have a bunch of codes which map with timestamp (unsigned int). The codes
> look like this
>
> AA4
> AAA5
> A21
> A4
> ...
> Z435
>
> The size range from 1 character to 4 characters (1 to 4 bytes,
> respectively).
>
>
> Would adding a lookup table for all my codes help in reducing space? If so,
> what would be the best way to hash something like this?
>

You are trying to save on disk space?  You could make your keys binary
four bytes max null prefixed if < 4 characters?  Why are you trying to
save disk space?  You want a lookup table so you can have a code that
is smaller than that of the 1-4 character codes?

St.Ack
St.Ack