CDCR broken for Mixed Replica Collections

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CDCR broken for Mixed Replica Collections

WebsterHomer
I was looking at SOLR-12057

According to the comment on the ticket, CDCR can not work when a collection
has PULL Replicas. That seems like a MAJOR limitation to CDCR and PULL
Replicas. Is this likely to be addressed in the future?
CDCR currently is broken for TLOG replicas too.

https://issues.apache.org/jira/browse/SOLR-12057?focusedCommentId=16391558&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16391558

Thanks

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Re: CDCR broken for Mixed Replica Collections

Erick Erickson
CDCR won't really ever make sense for PULL replicas since the PULL
replicas have no tlog and don't do any indexing and can't ever become
a leader seamlessly.

As for plans to address TLOG replicas, patches are welcome if you have
a need. That's really how open source works, people add functionality
as they have use-cases they need to support and contribute them back.
So far this isn't a high-demand topic.

Best,
Erick

On Wed, Apr 25, 2018 at 8:03 AM, Webster Homer <[hidden email]> wrote:

> I was looking at SOLR-12057
>
> According to the comment on the ticket, CDCR can not work when a collection
> has PULL Replicas. That seems like a MAJOR limitation to CDCR and PULL
> Replicas. Is this likely to be addressed in the future?
> CDCR currently is broken for TLOG replicas too.
>
> https://issues.apache.org/jira/browse/SOLR-12057?focusedCommentId=16391558&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16391558
>
> Thanks
>
> --
>
>
> This message and any attachment are confidential and may be
> privileged or
> otherwise protected from disclosure. If you are not the intended
> recipient,
> you must not copy this message or attachment or disclose the
> contents to
> any other person. If you have received this transmission in error,
> please
> notify the sender immediately and delete the message and any attachment
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> subsidiaries do
> not accept liability for any omissions or errors in this
> message which may
> arise as a result of E-Mail-transmission or for damages
> resulting from any
> unauthorized changes of the content of this message and
> any attachment thereto.
> Merck KGaA, Darmstadt, Germany and any of its
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> that this message is free of viruses and does
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Re: CDCR broken for Mixed Replica Collections

Amrit Sarkar
Webster,

I have patch uploaded to both Cdcr supporting Tlog:
https://issues.apache.org/jira/browse/SOLR-12057 and core not getting
failed while initializing for Pull type replicas:
https://issues.apache.org/jira/browse/SOLR-12071 and awaiting feedback from
open source community. The solution for pull type replicas can be designed
better, apart from that, if this is urgent need for you, please apply the
patches for your packages and probably give a shot. I will added extensive
tests for both the use-cases.

Amrit Sarkar
Search Engineer
Lucidworks, Inc.
415-589-9269
www.lucidworks.com
Twitter http://twitter.com/lucidworks
LinkedIn: https://www.linkedin.com/in/sarkaramrit2
Medium: https://medium.com/@sarkaramrit2

On Thu, Apr 26, 2018 at 2:46 AM, Erick Erickson <[hidden email]>
wrote:

> CDCR won't really ever make sense for PULL replicas since the PULL
> replicas have no tlog and don't do any indexing and can't ever become
> a leader seamlessly.
>
> As for plans to address TLOG replicas, patches are welcome if you have
> a need. That's really how open source works, people add functionality
> as they have use-cases they need to support and contribute them back.
> So far this isn't a high-demand topic.
>
> Best,
> Erick
>
> On Wed, Apr 25, 2018 at 8:03 AM, Webster Homer <[hidden email]>
> wrote:
> > I was looking at SOLR-12057
> >
> > According to the comment on the ticket, CDCR can not work when a
> collection
> > has PULL Replicas. That seems like a MAJOR limitation to CDCR and PULL
> > Replicas. Is this likely to be addressed in the future?
> > CDCR currently is broken for TLOG replicas too.
> >
> > https://issues.apache.org/jira/browse/SOLR-12057?
> focusedCommentId=16391558&page=com.atlassian.jira.
> plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16391558
> >
> > Thanks
> >
> > --
> >
> >
> > This message and any attachment are confidential and may be
> > privileged or
> > otherwise protected from disclosure. If you are not the intended
> > recipient,
> > you must not copy this message or attachment or disclose the
> > contents to
> > any other person. If you have received this transmission in error,
> > please
> > notify the sender immediately and delete the message and any attachment
> >
> > from your system. Merck KGaA, Darmstadt, Germany and any of its
> > subsidiaries do
> > not accept liability for any omissions or errors in this
> > message which may
> > arise as a result of E-Mail-transmission or for damages
> > resulting from any
> > unauthorized changes of the content of this message and
> > any attachment thereto.
> > Merck KGaA, Darmstadt, Germany and any of its
> > subsidiaries do not guarantee
> > that this message is free of viruses and does
> > not accept liability for any
> > damages caused by any virus transmitted
> > therewith.
> >
> >
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Re: CDCR broken for Mixed Replica Collections

Amrit Sarkar
Pardon, * I have added extensive tests for both the use-cases.

Amrit Sarkar
Search Engineer
Lucidworks, Inc.
415-589-9269
www.lucidworks.com
Twitter http://twitter.com/lucidworks
LinkedIn: https://www.linkedin.com/in/sarkaramrit2
Medium: https://medium.com/@sarkaramrit2

On Thu, Apr 26, 2018 at 3:50 AM, Amrit Sarkar <[hidden email]>
wrote:

> Webster,
>
> I have patch uploaded to both Cdcr supporting Tlog: https://issues.apache.
> org/jira/browse/SOLR-12057 and core not getting failed while initializing
> for Pull type replicas: https://issues.apache.org/jira/browse/SOLR-12071
> and awaiting feedback from open source community. The solution for pull
> type replicas can be designed better, apart from that, if this is urgent
> need for you, please apply the patches for your packages and probably give
> a shot. I will added extensive tests for both the use-cases.
>
> Amrit Sarkar
> Search Engineer
> Lucidworks, Inc.
> 415-589-9269
> www.lucidworks.com
> Twitter http://twitter.com/lucidworks
> LinkedIn: https://www.linkedin.com/in/sarkaramrit2
> Medium: https://medium.com/@sarkaramrit2
>
> On Thu, Apr 26, 2018 at 2:46 AM, Erick Erickson <[hidden email]>
> wrote:
>
>> CDCR won't really ever make sense for PULL replicas since the PULL
>> replicas have no tlog and don't do any indexing and can't ever become
>> a leader seamlessly.
>>
>> As for plans to address TLOG replicas, patches are welcome if you have
>> a need. That's really how open source works, people add functionality
>> as they have use-cases they need to support and contribute them back.
>> So far this isn't a high-demand topic.
>>
>> Best,
>> Erick
>>
>> On Wed, Apr 25, 2018 at 8:03 AM, Webster Homer <[hidden email]>
>> wrote:
>> > I was looking at SOLR-12057
>> >
>> > According to the comment on the ticket, CDCR can not work when a
>> collection
>> > has PULL Replicas. That seems like a MAJOR limitation to CDCR and PULL
>> > Replicas. Is this likely to be addressed in the future?
>> > CDCR currently is broken for TLOG replicas too.
>> >
>> > https://issues.apache.org/jira/browse/SOLR-12057?focusedComm
>> entId=16391558&page=com.atlassian.jira.plugin.system.
>> issuetabpanels%3Acomment-tabpanel#comment-16391558
>> >
>> > Thanks
>> >
>> > --
>> >
>> >
>> > This message and any attachment are confidential and may be
>> > privileged or
>> > otherwise protected from disclosure. If you are not the intended
>> > recipient,
>> > you must not copy this message or attachment or disclose the
>> > contents to
>> > any other person. If you have received this transmission in error,
>> > please
>> > notify the sender immediately and delete the message and any attachment
>> >
>> > from your system. Merck KGaA, Darmstadt, Germany and any of its
>> > subsidiaries do
>> > not accept liability for any omissions or errors in this
>> > message which may
>> > arise as a result of E-Mail-transmission or for damages
>> > resulting from any
>> > unauthorized changes of the content of this message and
>> > any attachment thereto.
>> > Merck KGaA, Darmstadt, Germany and any of its
>> > subsidiaries do not guarantee
>> > that this message is free of viruses and does
>> > not accept liability for any
>> > damages caused by any virus transmitted
>> > therewith.
>> >
>> >
>> >
>> > Click http://www.emdgroup.com/disclaimer
>> > <http://www.emdgroup.com/disclaimer> to access the
>> > German, French, Spanish
>> > and Portuguese versions of this disclaimer.
>>
>
>