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Posted to solr-user@lucene.apache.org by Mark Schoy <he...@gmx.de> on 2011/06/20 14:28:08 UTC
Master Slave Replication in Solr Cloud - What happens if the master
is not available?
Hi,
if I use a master slave replication in Solr Cloud and the master
crashes, can the slave automatically switch to master mode?
Or is there another way to index documents after the master is down?
Thanks.
Re: Master Slave Replication in Solr Cloud - What happens if the
master is not available?
Posted by Mark Schoy <he...@gmx.de>.
You're right, thanks!
2011/6/20 Erick Erickson <er...@gmail.com>:
> Hmmm, be a little careful here with terminology.
> Shards may be unnecessary if you can put your whole index
> on a single searcher. It's preferable to simply have each
> slave hold a complete copy of the index, no sharding necessary.
>
> Best
> Erick
>
> On Mon, Jun 20, 2011 at 9:45 AM, Mark Schoy <he...@gmx.de> wrote:
>> Thanks for your answer Erick.
>>
>> So the easiest way will be to set up 2 shard cluster with shard replicas ;)
>>
>> 2011/6/20 Erick Erickson <er...@gmail.com>:
>>> No, there's nothing built into Solr to automatically promote a slave
>>> to a master.
>>>
>>> You have several choices here. One is to build a new master and
>>> reindex from scratch.
>>>
>>> Another is to configure your slave as a new master and then
>>> bring up a new machine and have it replicate. Now make that new machine
>>> your master (you'll have to re-configure both).
>>>
>>> The fun part is continuing to serve requests while all this is going
>>> on. It's easier
>>> if you have more than one slave so you can move things around while the
>>> remaining slave is reconfigured (or whatever)....
>>>
>>> Best
>>> Erick
>>>
>>> On Mon, Jun 20, 2011 at 8:28 AM, Mark Schoy <he...@gmx.de> wrote:
>>>> Hi,
>>>>
>>>> if I use a master slave replication in Solr Cloud and the master
>>>> crashes, can the slave automatically switch to master mode?
>>>>
>>>> Or is there another way to index documents after the master is down?
>>>>
>>>> Thanks.
>>>>
>>>
>>
>
Re: Master Slave Replication in Solr Cloud - What happens if the
master is not available?
Posted by Erick Erickson <er...@gmail.com>.
Hmmm, be a little careful here with terminology.
Shards may be unnecessary if you can put your whole index
on a single searcher. It's preferable to simply have each
slave hold a complete copy of the index, no sharding necessary.
Best
Erick
On Mon, Jun 20, 2011 at 9:45 AM, Mark Schoy <he...@gmx.de> wrote:
> Thanks for your answer Erick.
>
> So the easiest way will be to set up 2 shard cluster with shard replicas ;)
>
> 2011/6/20 Erick Erickson <er...@gmail.com>:
>> No, there's nothing built into Solr to automatically promote a slave
>> to a master.
>>
>> You have several choices here. One is to build a new master and
>> reindex from scratch.
>>
>> Another is to configure your slave as a new master and then
>> bring up a new machine and have it replicate. Now make that new machine
>> your master (you'll have to re-configure both).
>>
>> The fun part is continuing to serve requests while all this is going
>> on. It's easier
>> if you have more than one slave so you can move things around while the
>> remaining slave is reconfigured (or whatever)....
>>
>> Best
>> Erick
>>
>> On Mon, Jun 20, 2011 at 8:28 AM, Mark Schoy <he...@gmx.de> wrote:
>>> Hi,
>>>
>>> if I use a master slave replication in Solr Cloud and the master
>>> crashes, can the slave automatically switch to master mode?
>>>
>>> Or is there another way to index documents after the master is down?
>>>
>>> Thanks.
>>>
>>
>
Re: Master Slave Replication in Solr Cloud - What happens if the
master is not available?
Posted by Mark Schoy <he...@gmx.de>.
Thanks for your answer Erick.
So the easiest way will be to set up 2 shard cluster with shard replicas ;)
2011/6/20 Erick Erickson <er...@gmail.com>:
> No, there's nothing built into Solr to automatically promote a slave
> to a master.
>
> You have several choices here. One is to build a new master and
> reindex from scratch.
>
> Another is to configure your slave as a new master and then
> bring up a new machine and have it replicate. Now make that new machine
> your master (you'll have to re-configure both).
>
> The fun part is continuing to serve requests while all this is going
> on. It's easier
> if you have more than one slave so you can move things around while the
> remaining slave is reconfigured (or whatever)....
>
> Best
> Erick
>
> On Mon, Jun 20, 2011 at 8:28 AM, Mark Schoy <he...@gmx.de> wrote:
>> Hi,
>>
>> if I use a master slave replication in Solr Cloud and the master
>> crashes, can the slave automatically switch to master mode?
>>
>> Or is there another way to index documents after the master is down?
>>
>> Thanks.
>>
>
Re: Master Slave Replication in Solr Cloud - What happens if the
master is not available?
Posted by Erick Erickson <er...@gmail.com>.
No, there's nothing built into Solr to automatically promote a slave
to a master.
You have several choices here. One is to build a new master and
reindex from scratch.
Another is to configure your slave as a new master and then
bring up a new machine and have it replicate. Now make that new machine
your master (you'll have to re-configure both).
The fun part is continuing to serve requests while all this is going
on. It's easier
if you have more than one slave so you can move things around while the
remaining slave is reconfigured (or whatever)....
Best
Erick
On Mon, Jun 20, 2011 at 8:28 AM, Mark Schoy <he...@gmx.de> wrote:
> Hi,
>
> if I use a master slave replication in Solr Cloud and the master
> crashes, can the slave automatically switch to master mode?
>
> Or is there another way to index documents after the master is down?
>
> Thanks.
>