search for: zfs_write

Will a write(2) to a ZFS file be made durable atomically? Under the hood in ZFS, writes are committed using either shadow paging or logging, as I understand it. So I believe that I mean to ask whether a write(2), pushed to ZPL, and pushed on down the stack, can be split into multiple transactions? Or, instead, is it guaranteed to be committed in a single transaction, and so committed atomically?

I''m seeing some pretty pitiful performance using ZFS on a NFS server, with a ZFS volume exported (only with rw=host.foo.com,root=host.foo.com opts) and mounted on a Linux host running kernel 2.4.31. This linux kernel I''m working with is limited in that I can only do NFSv2 mounts... irregardless of that aspect, I''m sure something''s amiss. I mounted the zfs-based

https://bugzilla.samba.org/show_bug.cgi?id=13317 Bug ID: 13317 Summary: rsync returns success when target filesystem is full Product: rsync Version: 3.1.2 Hardware: x64 OS: FreeBSD Status: NEW Severity: major Priority: P5 Component: core Assignee: wayned at samba.org

I just had a quick play with gzip compression on a filesystem and the result was the machine grinding to a halt while copying some large (.wav) files to it from another filesystem in the same pool. The system became very unresponsive, taking several seconds to echo keystrokes. The box is a maxed out AMD QuadFX, so it should have plenty of grunt for this. Comments? Ian