I just found that I do not exactly know: What is ZFS metadata in regard to caching and redundant storage policy? What sort of blocks does it include and what - doesn't?
I know that there is some metadata which can be prioritized in ARC with "primarycache" (or in L2ARC with "secondarycache") attributes. There is some metadata which is reportedly stored in a mirrored way regardless of a raidzN layout used for data blocks, and this matches what I see in iostat output. But which data is it - only ZFS infrastructure (indirect blocks et al), or also the filesystem directory tree? The latter I am interested in particular: if I set caching to metadata, should I expect recursive directory walks to be crippled or boosted? :) Thanks, //Jim _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
