How can export and import a hyperloglog key in a binary file.

[Vikash Ranjan]

Hi All,

I would like to store set of user in a hyperloglog, After this I would like to export the data into binary file and import into some other redis cluster. Is it possible?

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Thank you for your co-operation.

*************************

[Itamar Haber]

You can use DUMP and RESTORE on the HLL key to move the data structure between databases. The serialized value of your HLL can be saved by your client in any type of file for transport.

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[Marc Gravell]

Are you simply looking for DUMP and RESTORE?

http://redis.io/commands/dump
http://redis.io/commands/restore

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[Javier Guerra Giraldez]

On Mon, Apr 6, 2015 at 2:07 AM, Vikash Ranjan <vik...@vserv.com> wrote:
> I would like to store set of user in a hyperloglog, After this I would like
> to export the data into binary file and import into some other redis
> cluster. Is it possible?

just like the BIT operations, the hyperloglog commands operate on a
string, you can simply read/write it. just don't try to operate on it
without a mighty wizard hat.

--
Javier

[Marc Gravell]

As a minor note: it must be emphasised that a HLL is an *approximation* of a set. You mention  set of users; if the set contents need to be precisely reliable, you might want to use a set instead of a HLL.

[Vikash Ranjan]

Is it possible to take dump of HLL key only? if yes, How can we do and then import to other redis?

[Vikash Ranjan]

No. I am looking for a specific HLL key dump and restore.

[Jan-Erik Rediger]

Then what exactly do you want to dump and restore? The actual commands
DUMP and RESTORY atleast give you the exact binary representation of the
HLL and can import them again.

On Wed, Apr 08, 2015 at 04:00:11AM -0700, Vikash Ranjan wrote:
> No. I am looking for a specific HLL key dump and restore.
>
> On Monday, April 6, 2015 at 7:39:31 PM UTC+5:30, Marc Gravell wrote:
> >
> > Are you simply looking for DUMP and RESTORE?
> >
> > http://redis.io/commands/dump
> > http://redis.io/commands/restore

> > On 6 Apr 2015 08:35, "Vikash Ranjan" <vik...@vserv.com <javascript:>>

> > wrote:
> >
> >> Hi All,
> >>
> >> I would like to store set of user in a hyperloglog, After this I would
> >> like to export the data into binary file and import into some other redis
> >> cluster. Is it possible?
> >>
> >>
> >> *************************
> >>

> >> *CONFIDENTIALITY CAUTION*
> >> *This communication (including any accompanying documents) is intended

> >> only for the use of the addressee(s) and contains PRIVATE AND CONFIDENTIAL
> >> information. Unauthorized reading, dissemination, distribution or copying
> >> of this communication is prohibited. If you have received this
> >> communication in error, please notify us immediately by e-mail and promptly
> >> destroy the original communication. Please do not copy it or use it for any
> >> other purposes, or disclose its contents to any other person. Unless stated
> >> to the contrary, any opinions or comments are personal to the writer and do
> >> not represent the official view of the Company. In case where it represents
> >> our official view, it needs to be revalidated and is subject to the terms

> >> of our engagement.*
> >>
> >> *Thank you for your co-operation.*

> >> *************************
> >>
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> >> To unsubscribe from this group and stop receiving emails from it, send an

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> >> For more options, visit https://groups.google.com/d/optout.
> >>
> >

> --
>
> *************************
>
> *CONFIDENTIALITY CAUTION*
> *This communication (including any accompanying documents) is intended only

> for the use of the addressee(s) and contains PRIVATE AND CONFIDENTIAL
> information. Unauthorized reading, dissemination, distribution or copying
> of this communication is prohibited. If you have received this
> communication in error, please notify us immediately by e-mail and promptly
> destroy the original communication. Please do not copy it or use it for any
> other purposes, or disclose its contents to any other person. Unless stated
> to the contrary, any opinions or comments are personal to the writer and do
> not represent the official view of the Company. In case where it represents
> our official view, it needs to be revalidated and is subject to the terms

> of our engagement.*
>
> *Thank you for your co-operation.*

[Vikash Ranjan]

I have three HLL keys and want to create a dump of only one key and restore on other redis server.

[Itamar Haber]

Again, DUMB is the answer. Of course, of you want the 3 keys merged, do a PFMERGE and dump the resulting HLL.

On the target server, do a RESTORE of the dumped value.

[Itamar Haber]

^DUMP of course, sorry.

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Itamar Haber | Chief Developers Advocate
Redis Watch Newsletter - Curator and Janitor
Redis Labs - Enterprise-Class Redis for Developers

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