Hi Shawn, I noticed the same and hence overruled the idea to use it. Further , while exploring the V2 api (as we're currently in Solr 6.6 and will soon be on Solr 7.X) ,I came across the shards API which has "property.index.version": "1525453818563"
Which is listed for each of the shards. I wonder if I should be leveraging this as this seem to be the index version & I dont think this number should vary on restart. Any pointers ? Thanks, Atita On Mon, May 7, 2018 at 11:16 AM, Shawn Heisey <apa...@elyograg.org> wrote: > On 5/6/2018 3:09 PM, Atita Arora wrote: > >> I am working on a developing a utility which lets one monitor the >> indexPipeline Status. >> The indexing job runs in two forms where either it - >> 1. Creates a new core OR >> 2. Runs the delta on existing core. >> To put down to simplest form I look into the DB timestamp when the >> indexing >> job was triggered and have a desire to read some stat / metric from Solr >> (preferably an API) which reports a timestamp when the CORE was created / >> modified. >> My utility completely relies on the difference between timestamps from DB >> & >> Solr as these two timestamps are leveraged to determine health of >> pipeline. >> >> I see the Master Version Timestamp under each shard which details the >> version / Gen / Size. >> Is that what I should be using ? How can I grab these from API ? >> I tried using metrics api : >> *http://localhost:8983/solr/admin/metrics?group=core&prefix=CORE >> <http://localhost:8983/solr/admin/metrics?group=core&prefix=CORE>* >> which details *CORE.startTime *but this timestamp changes whenever data is >> being added to any core on this node. >> *Is there any other suggestion to use some other way to determine the core >> creation timestamp* ? >> > > The startTime value is the time at which Solr started the core. If that > is getting updated frequently, then a reload operation is probably > happening on the core. Or, less likely, the Solr instance has been > restarted. I have checked a 6.6 system and on a core that is getting > updates as frequently as once a minute, startTime is a couple of days ago, > which was the last time that core was reloaded. > > I've been trying to figure out whether a Lucene index keeps track of the > time it was created, but I haven't found anything yet. If it doesn't, I do > wonder whether there might be some kind of metadata that Solr could write > to the index to record information like this. Solr would always have the > option of writing such metadata to an entirely different location within > the instanceDir. The index creation time is probably not the only > information that would be useful to have available. > > Thanks, > Shawn > >
