Forcemerge on daily or on monthly

We are implementing an Index Lifecycle Policy each month to reindex our daily indexes into a monthly index using the _reindex api

From has good notes but wanted to get ideas as to, whether:

  • Is it better to forcemerge the daily index at the end of each day and then reindex these at the end of each month?

  • Reindex into the monthly index and then forcemerge this index?

We have IoT data coming from our devices with about ~2 million documents per day and I am looking at best ways to maintain these indexes.

Any advice is much appreciated

Why not index into a monthly index instead and avoid reindexing?

thanks, that makes sense

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