[zfs-discuss] (fwd) Re: ZFS NFS service hanging on Sunday morning problem

2012-06-13 Thread TPCzfs
Dear All, I have been advised to enquire here on zfs-discuss with the ZFS problem described below, following discussion on Usenet NG comp.unix.solaris. The full thread should be available here https://groups.google.com/forum/#!topic/comp.unix.solaris/uEQzz1t-G1s Many thanks Tom Crane

Re: [zfs-discuss] Occasional storm of xcalls on segkmem_zio_free

2012-06-13 Thread Roch
Sašo Kiselkov writes: On 06/12/2012 05:37 PM, Roch Bourbonnais wrote: So the xcall are necessary part of memory reclaiming, when one needs to tear down the TLB entry mapping the physical memory (which can from here on be repurposed). So the xcall are just part of this. Should

Re: [zfs-discuss] ZFS NFS service hanging on Sunday morning problem

2012-06-13 Thread TPCzfs
Shot in the dark here: What are you using for the sharenfs value on the ZFS filesystem? Something like rw=.mydomain.lan ? They are IP blocks or hosts specified as FQDNs, eg., pptank/home/tcrane sharenfs rw=@192.168.101/24,rw=serverX.xx.rhul.ac.uk:serverY.xx.rhul.ac.uk I've had

[zfs-discuss] NFS asynchronous writes being written to ZIL

2012-06-13 Thread Timothy Coalson
I noticed recently that the SSDs hosting the ZIL for my pool had a large number in the SMART attribute for total LBAs written (with some calculation, it seems to be the total amount of data written to the pool so far), did some testing, and found that the ZIL is being used quite heavily (matching

Re: [zfs-discuss] NFS asynchronous writes being written to ZIL

2012-06-13 Thread Daniel Carosone
On Wed, Jun 13, 2012 at 05:56:56PM -0500, Timothy Coalson wrote: client: ubuntu 11.10 /etc/fstab entry: server:/mainpool/storage /mnt/myelin nfs bg,retry=5,soft,proto=tcp,intr,nfsvers=3,noatime,nodiratime,async 0 0 nfsvers=3 NAME PROPERTY VALUE SOURCE

Re: [zfs-discuss] Recovery of RAIDZ with broken label(s)

2012-06-13 Thread Daniel Carosone
On Tue, Jun 12, 2012 at 03:46:00PM +1000, Scott Aitken wrote: Hi all, Hi Scott. :-) I have a 5 drive RAIDZ volume with data that I'd like to recover. Yeah, still.. I tried using Jeff Bonwick's labelfix binary to create new labels but it carps because the txg is not zero. Can you provide

Re: [zfs-discuss] NFS asynchronous writes being written to ZIL

2012-06-13 Thread Timothy Coalson
Interesting...from what I had read about NFSv3 asynchronous writes, especially bits about does not require the server to commit to stable storage, led me to expect different behavior. The performance impact on large writes (which we do a lot of) wasn't severe, so sync=disabled is probably not