Stochastic MQ Cache Policy (EXPERIMENTAL)
modulename: dm-cache-smq.ko
configname: CONFIG_DM_CACHE_SMQ
Linux Kernel Configuration
└─>Device Drivers
└─>Multiple devices driver support (RAID and LVM)
└─>Stochastic MQ Cache Policy (EXPERIMENTAL)
In linux kernel since version 4.1 (release Date: 2015-06-21)
A cache policy that uses a multiqueue ordered by recent hits
to select which blocks should be promoted and demoted.
This is meant to be a general purpose policy. It prioritises
reads over writes. This SMQ policy (vs MQ) offers the promise
of less memory utilization, improved performance and increased
adaptability in the face of changing workloads.
to select which blocks should be promoted and demoted.
This is meant to be a general purpose policy. It prioritises
reads over writes. This SMQ policy (vs MQ) offers the promise
of less memory utilization, improved performance and increased
adaptability in the face of changing workloads.