Todd E. Moore wrote:
I'm working with a group that wants to commit all the way to disk
every single write - flushing or bypassing all the caches each time.
The fsync() call will flush the ZIL. As for the disk's cache, if
given the entire disk, ZFS enables its cache by default. Rather
Todd E. Moore wrote:
I'm working with a group that wants to commit all the way to disk every
single write - flushing or bypassing all the caches each time. The
fsync() call will flush the ZIL. As for the disk's cache, if given the
entire disk, ZFS enables its cache by default. Rather than ZFS
Carson Gaspar wrote:
Todd E. Moore wrote:
I'm working with a group that wants to commit all the way to disk every
single write - flushing or bypassing all the caches each time. The
fsync() call will flush the ZIL. As for the disk's cache, if given the
entire disk, ZFS enables its cache by
I
want to disable write cache on the disk drives in our J4200 JBODs so
that fsync() actually writes to disk, not just to the cache on the
drive.
I did
this using 'format -e', but it displays a warning about the drive being
part of a zpool and also it says that the change is not permanent.
Todd E. Moore wrote:
I want to disable write cache on the disk drives in our J4200 JBODs so
that fsync() actually writes to disk, not just to the cache on the drive.
ZFS will do this for you, via the way the ZIL works.
Neil explains it pretty well at
