On Thu, Oct 24, 2019 at 12:14 PM alka <[email protected]> wrote: > Can someone confirm this behaviour (that special vdev do not use Arc or > ram write caching). While this would help for a lot of workloads with > low ram or given iops needs, this is essential to care about when > designing a pool layout. >
Blocks should be included in the ARC regardless of what allocation class they are in (special vs normal). The reasoning is that RAM is faster than special devices. You can select what's included in the ARC by using the "primarycache" property, but this still ignores allocation class. --matt ------------------------------------------ illumos: illumos-discuss Permalink: https://illumos.topicbox.com/groups/discuss/T7dbc47cd249baa9c-Me0499605d48b02d7ce2301c8 Delivery options: https://illumos.topicbox.com/groups/discuss/subscription
