Multiple Data Paths (MDP) is a pseudo-software-RAID-0 feature within Elasticsearch allowing multiple paths to be specified in the path.data setting (which usually point to different disks). Although it has been used in the past as a simple way to run a multi-disk setups, it has long been a source of user complaints due to confusing or unintuitive behavior. Additionally, the implementation is complex, and not well-tested nor maintained, with practically no benefit over spanning the data path filesystem across multiple drives and/or running one node for each data path.
We have long advised against using MDP, and are now ready to deprecate and remove it. This is a meta-issue to track that work.
Multiple Data Paths (MDP) is a pseudo-software-RAID-0 feature within Elasticsearch allowing multiple paths to be specified in the path.data setting (which usually point to different disks). Although it has been used in the past as a simple way to run a multi-disk setups, it has long been a source of user complaints due to confusing or unintuitive behavior. Additionally, the implementation is complex, and not well-tested nor maintained, with practically no benefit over spanning the data path filesystem across multiple drives and/or running one node for each data path.
We have long advised against using MDP, and are now ready to deprecate and remove it. This is a meta-issue to track that work.
Remove documentation from 8.0Block MDP in 8.0Remove MDP from 8.0