Endurant Cache (EC) is a caching mechanism that is enabled by default in OneFS. EC consolidates multiple small, random, synchronous writes to create fewer, more efficient writes to disk. For many workloads, the use of EC can help smooth out latency and increase performance.
EC is not needed with traditional safety and security video workloads and performance can actually improve when EC is disabled. Video workloads for safety and security use one, two or three video recorders to write to a node, including Tier 1 video ingest or Tier 2 video archiving. While these workloads are synchronous, they are also large and sequential, which can cause a bottleneck when using EC.
To disable EC, run the following command from the command line interface:
isi_sysctl_cluster "efs.bam.ec.mode=0"