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From N Keywal <nkey...@gmail.com>
Subject Re: sequence number
Date Tue, 31 Jan 2012 08:21:34 GMT
Hi,

Yes, each cell is associated to a long. By default it's a timestamps, but
you can set it yourself when you create the put.
It's stored everywhere.

You've got a lot of information and links on this in the hbase book (
http://hbase.apache.org/book.html#versions)

Cheers,

N.

On Mon, Jan 30, 2012 at 9:38 PM, Noureddine BOUYAHIAOUI <
nour.bouyahiaoui@free.fr> wrote:

> Hi,
>
> In my reads about HBase, I understand that, The HRegionServer (n time
> HRegion) use sequence number ( AtomicLong ) to version each key/value
> stored in WAL.
>
> Please can you give me some details about this notion, for example how
> HRegionServer create his sequence number, and why we use it. Is't
> considered as version identifier?
>
> Best regards.
>
> Noureddine Bouyahiaoui
>
>
>
>

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