"head units" crash or do weird things, but disks persist. There are a couple of
HA head-unit solutions out there but most of them have their own separate
storage and they effectively just send transaction groups to each other.
The other way is to connect 2 nodes to an external SAS/FC chassis. cr
> I have this with 36 2TB drives (and 2 separate boot drives).
>
> http://www.colfax-intl.com/jlrid/SpotLight_more_Acc.asp?L=134&S=58&B=2267
That's just a Supermicro SC847.
http://www.supermicro.com/products/chassis/4U/?chs=847
Stay away from the 24 port expander backplanes. I've gone thru sever
Geoff Nordli wrote:
> With our particular use case we are going to do a "save
> state" on their
> virtual machines, which is going to write 100-400 MB
> per VM via CIFS or
> NFS, then we take a snapshot of the volume, which
> guarantees we get a
> consistent copy of their VM.
maybe you left out
> > Please can this be on by default? Please?
>
> There are some situations where many reports may be sent
> per second so
> it is not necessarily a wise idea for this to be enabled by
> default.
Every implementation of Syslog worth a damn has automatic message throttling
and coalescing. This
Thanks for the testing. so FINALLY with version > 19 does ZFS demonstrate
production-ready status in my book. How long is it going to take Solaris to
catch up?
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For those who are interested in some of the options out there.
DIY DAS:
Supermicro 36 bay case - $1800
Promise 16 bay JBOD VTrak J610sD - $3700
Promise VTE610sD - $7500 (SAS attached head unit with onboard raid controllers,
takes JBOD expansion)
The following apply to 1TB SATA drive configuratio
> It might help people to understand how ridiculous they
> sound going on and on
> about buying a premium storage appliance without any
> storage.
Since I started this, let me explain to those who can't begin to understand why
I proposed something so "stupid". At work (branch of a federal gov't b
> charge a premium for their products but they ARE a
> enterprise vendor. You
> wouldn't say something like "hey, where can i buy a Ferrari
> without any
> wheels...i'm not paying x amount for a silly aluminum
> wheel"
true. but I buy a Ferrari for the engine and bodywork and chassis engineering
> charge a premium for their products but they ARE a
> enterprise vendor. You
> wouldn't say something like "hey, where can i buy a Ferrari
> without any
> wheels...i'm not paying x amount for a silly aluminum
> wheel"
true. but I buy a Ferrari for the engine and bodywork and chassis engineering
what with the home NAS conversations, what's the trick to buy a J4500 without
any drives? SUN like every other "enterprise" storage vendor thinks it's ok to
rape their customers and I for one, am not interested in paying 10x for a silly
SATA hard drive.
_
please forgive the 'stupid' question.
Aside from having a convenient hash table of checksums to consult and upon
detection of a collision knowing we are dealing with a duplicate, why checksum
data when the memory bus, PCI-e/x bus, sata/sas bus, and the hard disk itself
use Reed-Solomon (or simi
the proper solution to out of control cabling is ML cables. However, aside from
the Supermicro 8-in-2 type of pseudo-enclosures nobody seems to make them for
the typical consumer use. You can get 12 or 16 drive backplanes that use ML
cables but they are necessarily wed to a particular chassis.
With the absolutely deplorable reliability of drives >1TB why would one even
waste their money? The 500GB RE2/3 and NS drives are very reliable and
<$.12/gb. I get new drives off ebay all the time.
NAS speed is all about spindles. 6 spindles will always outrun a setup with 3.
Almost any mid-siz
Chris Siebenmann wrote:
> People have already mentioned the RAID-[56] write hole,
> but it's more
> than that; in a never-overwrite system with multiple blocks
> in one RAID
> stripe, how do you handle updates to some of the blocks?
>
> See:
> http://utcc.utoronto.ca/~cks/space/blog/solar
I find it baffling that RaidZ(2,3) was designed to split a record-size block
into N (N=# of member devices) pieces and send the uselessly tiny requests to
spinning rust when we know the massive delays entailed in head seeks and
rotational delay. The ZFS-mirror and load-balanced configuration do
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