I have an Elasticsearch Cluster (v5.6.9) - x2 Data Nodes Both Physical Servers with Storage on different 3PAR systems + x1 Master (Quorum VM). Having 2 Shards + 1 Replica.
I need to migrate both Data Nodes' storage to new 3PAR systems. (Each Data Node has 9TB Data)
Need some clarifications on the below options:
Option 1:
Present New LUN to ES Data Node with the same size
Shutdown ES Data Node
Unexport Old LUN
Start ES Data Node
ES Cluster will rebuild data with the replicas on the other ES Data node
Option 2:
Present New LUN to ES Data Node with the same size
Reindex Data to New LUN
Which would be the most efficient way to migrate?
Migrating LUN from the current 3PAR system to the new 3PAR systems is not a viable option.
Also would like to avoid reindexing, as this will be done at a later stage prior to upgrading to ES v7
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