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1. A system, comprising: a persistent key-value store hosted as a primary cache for a node for caching key-value record pairs for read and write access until written in a distributed manner across distributed storage; and a storage management system configured to: store the key-value record pairs within multiple chains within the persistent key-value store, wherein a chain includes an operation header bucket for recording key entries of key records and metadata of the key records, a data bucket for recording value entries of value records, and a meta bucket for recording bucket chain metadata pointing to the operation header bucket that points to the data bucket; and in response to receiving a write operation for a key-value record pair: generate a global virtual write index value for the key-value record pair based upon data within the write operation; select a first chain from the multiple chains for caching the key-value record pair based upon the global virtual write index value not occurring within the first chain; and perform a two phase commit process including a first phase to record a value record of the key-value record pair as a value entry within the first chain and a second phase, performed subsequent the first phase, to record a key record of the key-value record pair as a key entry within the first chain.
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