Hi S G,
This looks useful, and it should be easy to add to the existing metrics in
ReplicationHandler, probably somewhere around ReplicationHandler:856 .
> On 14 Mar 2018, at 20:16, S G <sg.online.em...@gmail.com> wrote:
>
> Hi,
>
> Solr does full recoveries very frequently - sometimes even for seemingly
> simple cases like adding a field to the schema, a couple of nodes go into
> recovery.
> It would be nice if it did not do such full recoveries so frequently but
> since that may require a lot of fixing, can we have a metric that reports
> how much a core has recovered already?
>
> Example:
>
> $ cd data
> $ du -h . | grep my_collection | grep -w index
> 77G ./my_collection_shard3_replica2/data/index.20180314184942993
> 145G ./my_collection_shard3_replica2/data/index.20180112001943687
>
> This shows that the shard3-replica2 core is doing a full recovery and has
> only copied 77G out of 145G
> That is about 50% recovery done.
>
>
> It would be very nice if we can have this as a JMX metric and we can then
> plot it somewhere instead of having to keep running the same command in a
> loop and guessing how much is left to be copied.
>
> A metric like the following would be great:
> {
> "my_collection_shard3_replica2": {
> "recovery": {
> "currentSize": "77 gb",
> "expectedSize": "145 gb",
> "percentRecovered": "50",
> "startTimeEpoch": "361273126317"
> }
> }
> }
>
> If it looks useful, I will open a JIRA for the same.
>
> Thanks
> SG
