Re: [zfs-discuss] Slow reads with ZFS+NFS

2009-10-20 Thread Gary Gogick
Trevor/all, We've been timing the copying of actual data (1GB of assorted files, generally < 1MB with numerous larger files thrown in) in an attempt to simulate real world use. We've been copying different sets of data around to try and avoid anything being cached anywhere. I don't recall the sp

Re: [zfs-discuss] Slow reads with ZFS+NFS

2009-10-20 Thread Ross Walker
On Oct 20, 2009, at 5:28 PM, Trevor Pretty wrote: No it concerns the difference between reads and writes. The write performance may be being over stated! The clients are Linux, the server is Solaris. True the mounts on the Linux clients were async, but so are typically the mounts on

Re: [zfs-discuss] Slow reads with ZFS+NFS

2009-10-20 Thread Brandon High
On Tue, Oct 20, 2009 at 10:35 AM, Gary Gogick wrote: > We're using NFS v4 via TCP, serving various Linux clients (the majority are > CentOS 5.3).  Connectivity is presently provided by a single gigabit > ethernet link; entirely conventional configuration (no jumbo frames/etc). Linux's NFS v4 (esp

Re: [zfs-discuss] Slow reads with ZFS+NFS

2009-10-20 Thread Trevor Pretty
No it concerns the difference between reads and writes. The write performance may be being over stated! Ross Walker wrote: But this is concerning reads not writes. -Ross On Oct 20, 2009, at 4:43 PM, Trevor Pretty wrote:

Re: [zfs-discuss] Slow reads with ZFS+NFS

2009-10-20 Thread Ross Walker
But this is concerning reads not writes. -Ross On Oct 20, 2009, at 4:43 PM, Trevor Pretty wrote: Gary Where you measuring the Linux NFS write performance? It's well know that Linux can use NFS in a very "unsafe" mode and report the write complete when it is not all the way to safe s

Re: [zfs-discuss] Slow reads with ZFS+NFS

2009-10-20 Thread Trevor Pretty
Gary Where you measuring the Linux NFS write performance? It's well know that Linux can use NFS in a very "unsafe" mode and report the write complete when it is not all the way to safe storage. This is often reported as Solaris has slow NFS write performance. This link does not mention NFS v4

Re: [zfs-discuss] Slow reads with ZFS+NFS

2009-10-20 Thread Richard Elling
cross-posting to nfs-discuss On Oct 20, 2009, at 10:35 AM, Gary Gogick wrote: Heya all, I'm working on testing ZFS with NFS, and I could use some guidance - read speeds are a bit less than I expected. Over a gig-e line, we're seeing ~30 MB/s reads on average - doesn't seem to matter if w

[zfs-discuss] Slow reads with ZFS+NFS

2009-10-20 Thread Gary Gogick
Heya all, I'm working on testing ZFS with NFS, and I could use some guidance - read speeds are a bit less than I expected. Over a gig-e line, we're seeing ~30 MB/s reads on average - doesn't seem to matter if we're doing large numbers of small files or small numbers of large files, the speed seem