recordsize of a child filesystem to (80k) smaller than a parent (128k)

[MikeJakubik]

Hello,

I set the recordsize of a child filesystem to (80k) to a smaller than a parent (128k)

NAME USED AVAIL REFER MOUNTPOINT
zroot 3.11G 1.68T 96K /zroot
zroot/ROOT 953M 1.68T 96K none
zroot/ROOT/default 953M 1.68T 953M /
zroot/jails 504K 1.68T 120K /usr/local/jails
zroot/jails/staging-app-01 96K 1.68T 96K /usr/local/jails/staging-app-01
zroot/jails/staging-app-02 96K 1.68T 96K /usr/local/jails/staging-app-02
zroot/jails/staging-db-01 96K 1.68T 96K /usr/local/jails/staging-db-01
zroot/jails/staging-db-02 96K 1.68T 96K /usr/local/jails/staging-db-02

Does this make any sense since the root FS is larger?

NAME PROPERTY VALUE SOURCE
zroot/jails recordsize 128K default
zroot/jails/staging-app-01 recordsize 128K default
zroot/jails/staging-db-01 recordsize 8K local

Thanks.

[amotin]

Children and parent data set record sizes are not related in any way. You can set any power of 2 you like between 512 bytes (I really don't recommend to go too low) and allowed maximum anywhere.

[MikeJakubik]

I set it to 8k per PostgreSQL recommendation for high IOPS, but if it will write at 128k then I guess it's pointless??