[SR-Users] Htable reload

[Henning Westerholt]

Hello,

just a note: if you use that large dataset, especially if the purpose is for routing decisions/prefix matching, you probably will get a better lookup performance with modules that uses another data structure more optimized for this case. Two examples for these modules are mtree and carrierroute. A hash table can degenerate into linear list(s), if the data is formed in a specific way.

Cheers,

Henning

--
Henning Westerholt – https://skalatan.de/blog/
Kamailio services – https://gilawa.com<https://gilawa.com/>

From: sr-users <sr-users-bounces at lists.kamailio.org> On Behalf Of Brooks Bridges
Sent: Thursday, April 7, 2022 5:17 PM
To: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
Subject: Re: [SR-Users] Htable reload

I have several htables with various amounts of data in them ranging from a couple hundred entries to a couple million entries and while the reload itself does take a bit, the vast majority of the delay is the database -> Kamailio loading time.  Once the data is in there, the pointer updates haven’t been anything I’ve noticed.  I’m sure it takes some measurable amount of time, but in my case it’s so imperceptible that it’s irrelevant.

Brooks Bridges
1200 S. Rogers Circle, Unit 6
Boca Raton, FL 33487
Office: 916-235-2097 Main: 888-444-1111
email: bbridges at call48.com<mailto:bbridges at call48.com>  | web: www.call48.com<http://www.call48.com/>
[cid:image001.png at 01D84ABD.7836EED0]

From: sr-users <sr-users-bounces at lists.kamailio.org<mailto:sr-users-bounces at lists.kamailio.org>> On Behalf Of David Villasmil
Sent: Thursday, April 7, 2022 08:09
To: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org<mailto:sr-users at lists.kamailio.org>>
Subject: Re: [SR-Users] Htable reload

Thanks Alex, I'm wondering how this will affect performance if there are many thousands or even millions of records...

Regards,

David Villasmil
email: david.villasmil.work at gmail.com<mailto:david.villasmil.work at gmail.com>
phone: +34669448337


On Thu, Apr 7, 2022 at 4:03 PM Alex Balashov <abalashov at evaristesys.com<mailto:abalashov at evaristesys.com>> wrote:
No, the reload actually creates a temporary new hash table (in heap), loads the entries from the DB into it, then iterates through the buckets of that temporary table and replaces the entries (pointers) in the existing table with the entries from the temporary table, then frees the buckets in the temporary table.

> On Apr 7, 2022, at 4:43 AM, David Villasmil <david.villasmil.work at gmail.com<mailto:david.villasmil.work at gmail.com>> wrote:
>
> Hello all,
>
> I’ve been trying to figure out how htable reloads happen. Does it replaces the existing one or creates a new one, populates it from the db and then renames it? The latter would be (I think) ideal, even if it uses more resources.
>
> Thanks!
>
> David
> --
> Regards,
>
> David Villasmil
> email: david.villasmil.work at gmail.com<mailto:david.villasmil.work at gmail.com>
> phone: +34669448337
> __________________________________________________________
> Kamailio - Users Mailing List - Non Commercial Discussions
>  * sr-users at lists.kamailio.org<mailto:sr-users at lists.kamailio.org>
> Important: keep the mailing list in the recipients, do not reply only to the sender!
> Edit mailing list options or unsubscribe:
>  * https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

--
Alex Balashov | Principal | Evariste Systems LLC

Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/


__________________________________________________________
Kamailio - Users Mailing List - Non Commercial Discussions
  * sr-users at lists.kamailio.org<mailto:sr-users at lists.kamailio.org>
Important: keep the mailing list in the recipients, do not reply only to the sender!
Edit mailing list options or unsubscribe:
  * https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
Confidentiality Notice: This e-mail, and any attachment to it, contains privileged and confidential information intended only for the use of the individual(s) or entity named on the e-mail. If the reader of this e-mail is not the intended recipient, or the employee or agent responsible for delivering it to the intended recipient, you are hereby notified that reading this e-mail is strictly prohibited. If you have received this e-mail in error, please immediately return it to the sender and delete it from your system.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kamailio.org/pipermail/sr-users/attachments/20220407/afdc9f45/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 13561 bytes
Desc: image001.png
URL: <http://lists.kamailio.org/pipermail/sr-users/attachments/20220407/afdc9f45/attachment.png>