OK, so I had some more time to work on this. I removed version 9.3 and tried with version 8.11. But still the same story: any of the API restore methods I try are rejected.
I have also tried stopping solr, copying the whole /var/solr/data/collectionname directory from old server to new server, and restarting. Nothing happens. The core doesn't appear on the new server. Manually creating /var/solr/data/collectionname and copying the conf directory into it doesn't do anything either. I have also tried creating a core on the new server. That also fails as it can't find solrconfig.xml, but does create a /var/solr/data/corename directory. I'm just drawing blanks everywhere. What next? On Mon, Sep 25, 2023 at 5:26 PM Vincenzo D'Amore <v.dam...@gmail.com> wrote: > In the past, when upgrading to a major version, well... sometimes it > happened, you can even have a loss of performance. > So before moving I would be sure if I can and what I gain from it. > For example in the Solr 9.x the Data Import Handler has been moved out to > an external component, still open source but it is external. > > On Mon, Sep 25, 2023 at 11:13 AM Jim Morgan <jim.mor...@nknews.org.invalid > > > wrote: > > > Thanks. Good tip for the logs. Although they didn't prove very useful in > > determining what the problem with the import was: absolutely nothing was > > logged! > > > > Server load: I have that under control in terms of RAM and hard disk > space > > and that won't be an issue. Is there a command to find out how many > > requests are being processed? Or any useful stats/status summary. Or do > you > > mean use grep and wc on logs ... also can do, but as I'm learning about > > Solr I'm keen to learn the tricks. > > > > Moving to the latest version was basically me trying to get as much done > in > > one disruption as possible. We have to do the migration, so I figured we > > should try to move to the latest solr version as well. If we can't do it, > > then I'll take the latest 8.x version, sure, but I thought I'd try. > > > > On Mon, Sep 25, 2023 at 4:59 PM Vincenzo D'Amore <v.dam...@gmail.com> > > wrote: > > > > > :) > > > looking at solr.log you can see the requests and, even if you cannot be > > > completely sure, which core is currently receiving requests. > > > Before moving to a new solr version I should understand how is your > > server > > > average load, how many requests per second your server is handling. > > > Honestly I'm not sure that moving to the latest solr version is a good > > > idea, what do you think to gain moving immediately to the latest > version? > > > Maybe better move to the latest solr 8 version > > > > > > On Mon, Sep 25, 2023 at 10:10 AM Jim Morgan > > <jim.mor...@nknews.org.invalid > > > > > > > wrote: > > > > > > > Quick response! There are two cores. But I think only one of them is > > > > actively in use. I think the other one doesn't need to be migrated. > But > > > > will know for sure when I manage it and can test the app with the new > > > > server! > > > > Core in use seems to be about 12Gb. > > > > > > > > On Mon, Sep 25, 2023 at 3:48 PM Vincenzo D'Amore <v.dam...@gmail.com > > > > > > wrote: > > > > > > > > > Hi Jim, > > > > > > > > > > how many cores (indexes) do you have in this Solr server? > > > > > > > > > > On Mon, Sep 25, 2023 at 9:41 AM Jim Morgan > > > <jim.mor...@nknews.org.invalid > > > > > > > > > > wrote: > > > > > > > > > > > Hi, > > > > > > I inherited a solr installation from a previous sysadmin, and > we'd > > > like > > > > > to > > > > > > see if we can move it from the current server to a new one. I > don't > > > > have > > > > > > much knowledge of solr, but I know my way around Linux. Apologies > > in > > > > > > advance for any dumb questions, and please feel free to educate > me. > > > > > > > > > > > > Old install is Solr 8.5 running on Ubuntu 18. We're thinking that > > > while > > > > > we > > > > > > are switching servers, we might as well try to upgrade to Ubuntu > 22 > > > and > > > > > > Solr 9.3 (with corresponding JVM increase to 11). > > > > > > First question, is that a crazy idea? Or should we be moving to > the > > > > same > > > > > > version of Solr on the new server, and then upgrade in place. > We'd > > > > prefer > > > > > > to do it with minimal downtime, so setting up parallel servers > and > > > > > > migrating the data across seems like the least disruptive. > > > > > > > > > > > > So I have tried the parallel server approach. No issues > installing > > > Solr > > > > > and > > > > > > JVM. From reading around the web, starting with > > > > > > > > > > > > > > > > > > > > > > > > > > > https://solr.apache.org/guide/solr/latest/deployment-guide/backup-restore.html > > > > > > And several other pages, which all seem to repeat the advice, the > > > > backup > > > > > > restore process is simple. This is a standalone install so I > should > > > use > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > http://localhost:8983/solr/collname/replication?command=backup&location=/snapshots > > > > > > > > > > > > to backup, which works fine: the backup appears in /snapshots/ as > > > > > > snapshot.2023xxx. All good. > > > > > > > > > > > > I take the backup, and copy it to the new server, and put it in > the > > > > same > > > > > > location, /snapshots/2023xxx > > > > > > Then apparenly I only need to run > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > http://localhost:8983/solr/collname/replication?command=restore&name=snapshot.2023xxx&location=/snapshots > > > > > > > > > > > > But this doesn't work. I've tried a lot of different variations, > > > > > combining > > > > > > snapshot name and location, with or without the collection name, > > but > > > > all > > > > > I > > > > > > get is the zen like error > > > > > > Searching for Solr? > > > > > > You must type the correct path. > > > > > > Solr will respond. > > > > > > > > > > > > So that's where I'm at. I'm wondering if I've missed a step > that's > > > > > obvious > > > > > > to Solr veterans, but which is missing from the backup/restore > > page. > > > > > > Do I need to create the core first, for example. Or create the > core > > > and > > > > > > copy config files over to the new server. > > > > > > > > > > > > > > > > > > > > > -- > > > > > Vincenzo D'Amore > > > > > > > > > > > > > > > > > > -- > > > Vincenzo D'Amore > > > > > > > > -- > Vincenzo D'Amore >
