Re: [zfs-discuss] Can the ZFS "copies" attribute substitute HW disk redundancy?

2012-08-02 Thread Nigel W
On Thu, Aug 2, 2012 at 3:39 PM, Richard Elling wrote: > On Aug 1, 2012, at 8:30 AM, Nigel W wrote: > > > Yes. +1 > > The L2ARC as is it currently implemented is not terribly useful for > storing the DDT in anyway because each DDT entry is 376 bytes but the > L2ARC reference is 176 bytes, so best c

Re: [zfs-discuss] unable to import the zpool

2012-08-02 Thread Hung-Sheng Tsao (LaoTsao) Ph.D
hi can you post zpool history regards Sent from my iPad On Aug 2, 2012, at 7:47, Suresh Kumar wrote: > Hi Hung-sheng, > > It is not displaying any output, like the following. > > bash-3.2# zpool import -nF tXstpool > bash-3.2# > > > Thanks & Regards, > Suresh. > > _

Re: [zfs-discuss] unable to import the zpool

2012-08-02 Thread GREGG WONDERLY
My experience has always been that ZFS tries hard to keep you from doing something wrong when devices are failing or otherwise unavailable. With mirrors, it will import with a device missing from a mirror vdev. I don't use cache or log devices in my mainly storage pools, so I've not seen a fa

Re: [zfs-discuss] encfs on top of zfs

2012-08-02 Thread Richard Elling
On Jul 31, 2012, at 8:05 PM, opensolarisisdeadlongliveopensolaris wrote: >> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- >> boun...@opensolaris.org] On Behalf Of Richard Elling >> >> I believe what you meant to say was "dedup with HDDs sux." If you had >> used fast SSDs instead

Re: [zfs-discuss] Can the ZFS "copies" attribute substitute HW disk redundancy?

2012-08-02 Thread Peter Jeremy
On 2012-Aug-02 18:30:01 +0530, opensolarisisdeadlongliveopensolaris wrote: >Ok, so the point is, in some cases, somebody might want redundancy on >a device that has no redundancy. They're willing to pay for it by >halving their performance. This isn't quite true - write performance will be at l

Re: [zfs-discuss] unable to import the zpool

2012-08-02 Thread Richard Elling
On Aug 1, 2012, at 12:21 AM, Suresh Kumar wrote: > Dear ZFS-Users, > > I am using Solarisx86 10u10, All the devices which are belongs to my zpool > are in available state . > But I am unable to import the zpool. > > #zpool import tXstpool > cannot import 'tXstpool': one or more devices is curr

Re: [zfs-discuss] Can the ZFS "copies" attribute substitute HW disk redundancy?

2012-08-02 Thread Richard Elling
On Aug 1, 2012, at 8:30 AM, Nigel W wrote: > On Wed, Aug 1, 2012 at 8:33 AM, Sašo Kiselkov wrote: >> On 08/01/2012 04:14 PM, Jim Klimov wrote: >>> chances are that >>> some blocks of userdata might be more popular than a DDT block and >>> would push it out of L2ARC as well... >> >> Which is why I

Re: [zfs-discuss] Can the ZFS "copies" attribute substitute HW disk redundancy?

2012-08-02 Thread Richard Elling
On Aug 1, 2012, at 2:41 PM, Peter Jeremy wrote: > On 2012-Aug-01 21:00:46 +0530, Nigel W wrote: >> I think a fantastic idea for dealing with the DDT (and all other >> metadata for that matter) would be an option to put (a copy of) >> metadata exclusively on a SSD. > > This is on my wishlist as w

[zfs-discuss] single-disk pool - Re: Can the ZFS "copies" attribute substitute HW disk redundancy?

2012-08-02 Thread Toby Thain
On 01/08/12 3:34 PM, opensolarisisdeadlongliveopensolaris wrote: From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Jim Klimov Well, there is at least a couple of failure scenarios where copies>1 are good: 1) A single-disk pool, as in a laptop.

Re: [zfs-discuss] Can the ZFS "copies" attribute substitute HW disk redundancy?

2012-08-02 Thread opensolarisisdeadlongliveopensolaris
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Jim Klimov > > In some of my cases I was "lucky" enough to get a corrupted /sbin/init > or something like that once, and the box had no other BE's yet, so the > OS could not do anything reasona

Re: [zfs-discuss] Can the ZFS "copies" attribute substitute HW disk redundancy?

2012-08-02 Thread opensolarisisdeadlongliveopensolaris
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Jim Klimov > > 2012-08-01 23:40, opensolarisisdeadlongliveopensolaris пишет: > > > Agreed, ARC/L2ARC help in finding the DDT, but whenever you've got a > snapshot destroy (happens every 15 min

Re: [zfs-discuss] unable to import the zpool

2012-08-02 Thread Hung-Sheng Tsao (LaoTsao) Ph.D
so zpool import -F .. zpool import -f ... all not working? regards Sent from my iPad On Aug 2, 2012, at 7:47, Suresh Kumar wrote: > Hi Hung-sheng, > > It is not displaying any output, like the following. > > bash-3.2# zpool import -nF tXstpool > bash-3.2# > > > Thanks & Regards, > Sur

Re: [zfs-discuss] unable to import the zpool

2012-08-02 Thread Suresh Kumar
Hi Hung-sheng, It is not displaying any output, like the following. bash-3.2# zpool import -nF tXstpool bash-3.2# *Thanks & Regards,* *Suresh.* ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-

Re: [zfs-discuss] unable to import the zpool

2012-08-02 Thread Hung-Sheng Tsao Ph.D.
http://docs.oracle.com/cd/E19963-01/html/821-1448/gbbwl.html what is the output of *zpool import -nF tXstpool* On 8/2/2012 2:21 AM, Suresh Kumar wrote: Hi Hung-sheng, Thanks for your response. I tried to import the zpool using *zpool import -nF tXstpool* please consider the below output. *bash-