What kind of testing did you do on the Samsung SSD?
I've used FusionIO cards to get upwards of 500MB/s writes and OCZ Deneva
SSD (SATA) drives to get 200-250MB/s writes. In many cases the trick is to
make sure you have a sufficient amount of threads doing writes in order to
get optimal perf
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Karel Gardas
>
> Thank you Christopher and Edward for all the detailed information
provided.
> Indeed DDRDrive looks like a right tool for fast ZIL, but for my
development
> workstation I'm rat
On Tue, Nov 23, 2010 at 9:55 AM, Krunal Desai wrote:
> What is the "upgrade path" like from this? For example, currently I
The ashift is set in the pool when it's created and will persist
through the life of that pool. If you set it at pool creation, it will
stay regardless of OS upgrades.
-B
-
On Nov 26, 2010, at 20:09 , taemun wrote:
> If you consider that for a 4KB internal drive, with a 512B external
> interface, a request for a 512B write will result in the drive reading 4KB,
> modifying it (putting the new 512B in) and then writing the 4KB out again.
> This is terrible from a lat
On 27 November 2010 08:05, Krunal Desai wrote:
> One new thought occurred to me; I know some of the 4K drives emulate 512
> byte sectors, so to the host OS, they appear to be no different than other
> 512b drives. With this additional layer of emulation, I would assume that
> ashift wouldn't be n
> What about powering the X25-E by an external power source, one that is also
> solid-state and backed by a UPS? In my experience, smaller power supplies
> tend to be much more reliable than typical ATX supplies.
I don't think the different PSU would be an issue, The supply you've linked
doesn
> I'd also note that in the future at some point, we won't be able to purchase
> 512B drives any more. In particular, I think that 3TB drives will all be 4KB
> formatted. So it isn't inadvisable for a pool that you plan on expanding to
> have ashift=12 (imo).
One new thought occurred to me; I k
Hi all,
I've run into the classic NFS performance bottleneck when the ZIL is enabled
and having no fast, dedicated ZIL device.
Being on a budget I concluded that an X25-E would be my best option, but there
is still the concern that its write cache is not battery-backed and that a
corrupt ZIL i
Thank you Christopher and Edward for all the detailed information provided.
Indeed DDRDrive looks like a right tool for fast ZIL, but for my development
workstation I'm rather searching for l2arc cache where as you note ReviDrive
might do the nice job.
Thanks,
Karel
--
This message posted from
> I've previously posted about some lockups I've experienced with ZFS.
>
> There were two suspected causes at the time: one was deduplication, and one
> was the 2009.06 code we were running.
After upgrading the zpools and adding some more disks to the pool I initiated a
zpool scrub and was reward
On Thu, Nov 25, 2010 at 12:45:16AM -0800, maciej kaminski wrote:
> I've detached disk from a mirrored zpool using "zpool detach" (not "zpool
> split") command. Is it possible to recover data from that disk? If yes, how?
> (and how to make it bootable)
Take a look at this thread:
http://
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Pavel Heimlich
>
> I tried to transfer some data between two S11 machines via a usb harddrive
> with zfs on it, but importing the zpool failed (with some assertion error
I did
> not write down)
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Pavel Heimlich
>
> Are there some zfs / OS parameters I could set so that my usb drive with
zfs
> on it would meet the expectations one has from a removable drive? (i.e.
safe
> to remove +-anyt
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Karel Gardas
>
> I'm curious if there is a support for OCZ RevoDrive SSD or any other SSD
> hooked directly on PCIe in Solaris. This RevoDrive looks particularly
> interesting for its low price
On Fri, November 26, 2010 08:16, Pavel Heimlich wrote:
> Are there some zfs / OS parameters I could set so that my usb drive with
> zfs on it would meet the expectations one has from a removable drive?
> (i.e. safe to remove +-anytime)
Nope. Most file systems on Unix don't have the expectation. Y
On 26/11/2010 13:16, Pavel Heimlich wrote:
I tried to transfer some data between two S11 machines via a usb harddrive with
zfs on it, but importing the zpool failed (with some assertion error I did not
write down) because I did not export it first (on the first machine). I had to
go back to th
Hi,
I tried to transfer some data between two S11 machines via a usb harddrive with
zfs on it, but importing the zpool failed (with some assertion error I did not
write down) because I did not export it first (on the first machine). I had to
go back to the first machine, plug the drive in again
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