On 07/23/11 04:57, Michael DeMan wrote:
Generally performance is going to pretty bad as well - USB sticks are
not made to be written too rapidly. They are entirely different animals
than SSDs. I would not be surprised (but would be curious to know if you
still move forward on this) that you will
+1 on the below, and in addition...
...compact flash, like off of USB sticks is not designed to deal with very many
writes to it. Commonly it is used to store a bootable image that maybe once a
year will have an upgrade on it.
Basically, trying to use those devices for a ZIL, even they are mir
If using two mirrors, you'll end up with a badly balanced pool. As it was, and
possibly is, this will lead to a performance penalty when one VDEV is full (the
300GB VDEV). This write performance has reportedly been fixed in Illumos, but I
don't know about S11ex. For OpenIndiana/Nexenta, the fix
2011/7/15 Eugen Leitl :
> Speaking of which, is there a point in using an eSATA flash stick?
> If yes, which?
It depends on the drive off course, you'll have to look up benchmark
results - but there are eSata sticks out there that are more or less
built to Perform (as opposed to providing cheap st
On Mon, Jul 18, 2011 at 1:20 PM, Brandon High wrote:
> On Sun, Jul 17, 2011 at 12:13 PM, Edward Ned Harvey
> wrote:
>> Actually, you can't do that. You can't make a vdev from other vdev's, and
>> when it comes to striping and mirroring your only choice is to do it the
>> right way.
>>
>> If yo
On Mon, Jul 18, 2011 at 3:28 PM, Tiernan OToole wrote:
> Ok, so, taking 2 300Gb disks, and 2 500Gb disks, and creating an 800Gb
> mirrored striped thing is sounding like a bad idea... what about just
> creating a pool of all disks, without using mirrors? I seen something called
> "copies", which i
Ok, so, taking 2 300Gb disks, and 2 500Gb disks, and creating an 800Gb
mirrored striped thing is sounding like a bad idea... what about just
creating a pool of all disks, without using mirrors? I seen something called
"copies", which if i am reading correctly, will make sure a number of copies
of a
On Sun, Jul 17, 2011 at 12:13 PM, Edward Ned Harvey
wrote:
> Actually, you can't do that. You can't make a vdev from other vdev's, and
> when it comes to striping and mirroring your only choice is to do it the
> right way.
>
> If you were REALLY trying to go out of your way to do it wrong someh
2011-07-17 23:13, Edward Ned Harvey пишет:
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
boun...@opensolaris.org] On Behalf Of Jim Klimov
if the OP were so inclined,
he could craft a couple of "striped" pools (300+500) and
then make a ZFS pool over these two.
Actually, you can'
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Jim Klimov
>
> if the OP were so inclined,
> he could craft a couple of "striped" pools (300+500) and
> then make a ZFS pool over these two.
Actually, you can't do that. You can't make a vde
2011-07-16 20:42, Edward Ned Harvey пишет:
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
boun...@opensolaris.org] On Behalf Of Jim Klimov
Well, in terms of mirroring over stripes, if any component of any
stripe
breaks,
the whole half of the mirror is degraded. If another drive f
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Jim Klimov
>
> Well, in terms of mirroring over stripes, if any component of any
> stripe
> breaks,
> the whole half of the mirror is degraded. If another drive from another
> half
> also break
2011-07-16 18:48, Tiernan OToole пишет:
thats not a typo... I was thinking 2 pools, 800gb each, and
mirrored... think i should mess around with this setup a bit more and
see what i can get working... might work better if i just move them
into a new enclosure... we see what happens...
Well,
thats not a typo... I was thinking 2 pools, 800gb each, and mirrored...
think i should mess around with this setup a bit more and see what i can get
working... might work better if i just move them into a new enclosure... we
see what happens...
Thanks for the info on the USB drives... if the ZIL d
So, i like the sound of that, but the box is a very frankinbox like... it
has 2 SATA ports, one used for the boot drive, one for one of the 500s...
the second 500Gb is IDE. The 2 USB drives both internally are SATA, so
pulling one and plugging it internally wont work that well... but thats for
the
2011-07-16 15:46, Tiernan OToole ?:
Thanks for the info. need to rebuild my machine and ZFS pool kind
of new to this and realized i built it as a stripe, not a mirror...
also, want to add extra disks...
As a follow up question:
I have 2 500Gb internal drives and 2 300Gb USB drives. If
> From: Tiernan OToole [mailto:lsmart...@gmail.com]
> Sent: Saturday, July 16, 2011 7:46 AM
>
> I have 2 500Gb internal drives and 2 300Gb USB drives. If i where to
create a 2
> pools, a 300Gb and a 500Gb in each, and then mirror over them, would that
> work? is it even posible? or what would you
Tiernan,
Depending on how you have created your current pool, you *may* be able to add
the mirroring without rebuilding it. Each disk in the stripe can have a second
disk of equal size attached to it to form a mirrored component, or vdev. So if
your pool has 2 500GB drives, attach another 500GB dr
Thanks for the info. need to rebuild my machine and ZFS pool kind of new
to this and realized i built it as a stripe, not a mirror... also, want to
add extra disks...
As a follow up question:
I have 2 500Gb internal drives and 2 300Gb USB drives. If i where to create
a 2 pools, a 300Gb and a
Well, not knowing a lot about these, but if the flash stick is based on SSD,
then it might work well, but if its just a standard USB key rebundled as a
eSATA disk, maybe not...
On Fri, Jul 15, 2011 at 5:54 PM, Eugen Leitl wrote:
> On Fri, Jul 15, 2011 at 04:21:13PM +, Tiernan OToole wrote:
>
On Fri, Jul 15, 2011 at 04:21:13PM +, Tiernan OToole wrote:
> This might be a stupid question, but here goes... Would adding, say, 4 4 or
> 8gb usb keys as a zil make enough of a difference for writes on an iscsi
> shared vol?
>
> I am finding reads are not too bad (40is mb/s over gige on 2
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Tiernan OToole
>
> This might be a stupid question, but here goes... Would adding, say, 4 4
or
> 8gb usb keys as a zil make enough of a difference for writes on an iscsi
shared
> vol?
>
> I am
This might be a stupid question, but here goes... Would adding, say, 4 4 or 8gb
usb keys as a zil make enough of a difference for writes on an iscsi shared
vol?
I am finding reads are not too bad (40is mb/s over gige on 2 500gb drives
stripped) but writes top out at about 10 and drop a lot low
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