Hello all, I'm trying to understand the ZFS IO scheduler ( http://www.eall.com.br/blog/?p=1170 ), and why sometimes the system seems to be "stalled" for some seconds, and every application that needs some IO (most read, i think), have serious problems. What can be a big problem in iSCSI or NFS soft mounts. Looking at the code, i could get to the zio_taskq_threads structure, and to this bug report: http://bugs.opensolaris.org/bugdatabase/printableBug.do?bug_id=6826241 And seems like it was already integrated to newer releases (i don't know since when)... Somebody could explain the real diff between the ISSUE and INTR, READ and WRITE changes, and maybe why in the first implementation were the same value for both? ;-) Another move that i did not fully understand very well, was the time between txg syncs, from 5s to 30s, what i think can make this problem worst, because we will have more data to commit. Well to much questions... ;-)
PS: Where i can find the patches and attachments from the bugs.opensolaris.org? The files mention attach, but i can not find them. Thanks a lot for your time! Leal [ http://www.eall.com.br/blog ] -- This message posted from opensolaris.org
