Mailing List Archive: Netapp: toasters

R100 ggregate size limited to 8 TByte?

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pwo at infineon

Feb 16, 2006, 2:57 PM

Post #1 of 5 (550 views)
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R100 ggregate size limited to 8 TByte?

Hello fellow toasters,

I plan to migrate my R100 (84 136 Gbyte disks) (yes I should upgrade to
newer systems ;-), to flexible volumes, ideally I would create a single
aggregate (12+12+12+12+12+11+11 disks leaving 2 HotSpares). Someone
mentioned that this would not be possible, and that the R100 has a
limit of 8 Tbyte for the aggregate size, thus I had to create two
aggregates? Is this true? could not find any hint on the NOW site yet
...

Cheers
--pwo

jeremyw at al

Feb 16, 2006, 3:18 PM

Post #2 of 5 (512 views)
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Re: R100 ggregate size limited to 8 TByte? [In reply to]

On 17/02/2006, at 9:57 AM, Peter W. Osel wrote:

> Hello fellow toasters,
>
> I plan to migrate my R100 (84 136 Gbyte disks) (yes I should upgrade to
> newer systems ;-), to flexible volumes, ideally I would create a single
> aggregate (12+12+12+12+12+11+11 disks leaving 2 HotSpares). Someone
> mentioned that this would not be possible, and that the R100 has a
> limit of 8 Tbyte for the aggregate size, thus I had to create two
> aggregates? Is this true? could not find any hint on the NOW site yet

This burnt me on an R200 (where the limit is 16TB).

The limits for aggregates are the same as the limits for volumes shown
in the configuration guide on NOW. For an R100 that is 8TB raw.

IMHO NetApp need to pull out all the stops to remove the 16TB limit on
the size of a WAFL file system. In our environment it's a killer,
especially now we have flexvols.

-jeremy

--
Jeremy Webber Senior Systems Engineer
Animal Logic Pty Ltd
Phone: +61 2 9383 4837 Fax: +61 2 9383 4801 Switch: +61 2 9383 4800

skottie at anim

Feb 16, 2006, 6:01 PM

Post #3 of 5 (506 views)
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Re: R100 ggregate size limited to 8 TByte? [In reply to]

it's not possible. the best you can do is two aggregates
like this:

Aggregate total used avail capacity
agr0 5975GB 5792GB 183GB 97%
agr0/.snapshot 0TB 0TB 0TB ---%
agr1 2151GB 1524GB 627GB 71%
agr1/.snapshot 0TB 0TB 0TB ---%

and two spares.

-skottie

Peter W. Osel wrote:
> Hello fellow toasters,
>
> I plan to migrate my R100 (84 136 Gbyte disks) (yes I should upgrade to
> newer systems ;-), to flexible volumes, ideally I would create a single
> aggregate (12+12+12+12+12+11+11 disks leaving 2 HotSpares). Someone
> mentioned that this would not be possible, and that the R100 has a
> limit of 8 Tbyte for the aggregate size, thus I had to create two
> aggregates? Is this true? could not find any hint on the NOW site yet
> ...
>
> Cheers
> --pwo

--

Scott Miller
skottie [at] anim

georgea at anz

Feb 16, 2006, 6:23 PM

Post #4 of 5 (511 views)
Permalink

RE: R100 ggregate size limited to 8 TByte? [In reply to]

From the filer config guide for 7.0.3

The following table defines the maximum system capacity supported by an
R100:

Configuration rules Size
For a 4-shelf configuration (in TB) Maximum raw aggregate/traditional
volume size 7
Maximum raw capacity 7
For a 7-shelf configuration (in TB) Maximum raw aggregate/traditional
volume size 8
Maximum raw capacity 12
RAID Group Size
(in number of disks) RAID4 Default 8
Maximum 8
RAID-DP Default 12
Maximum 12

------------------------------------------------------------------------
--------

-----Original Message-----
From: owner-toasters [at] mathworks [mailto:owner-toasters [at] mathworks]
On Behalf Of Skottie Miller
Sent: Friday, 17 February 2006 1:01 PM
To: Peter W. Osel
Cc: toasters [at] mathworks
Subject: Re: R100 ggregate size limited to 8 TByte?

it's not possible. the best you can do is two aggregates like this:

Aggregate total used avail capacity
agr0 5975GB 5792GB 183GB 97%
agr0/.snapshot 0TB 0TB 0TB ---%
agr1 2151GB 1524GB 627GB 71%
agr1/.snapshot 0TB 0TB 0TB ---%

and two spares.

-skottie

Peter W. Osel wrote:
> Hello fellow toasters,
>
> I plan to migrate my R100 (84 136 Gbyte disks) (yes I should upgrade
> to newer systems ;-), to flexible volumes, ideally I would create a
> single aggregate (12+12+12+12+12+11+11 disks leaving 2 HotSpares).
> Someone mentioned that this would not be possible, and that the R100
> has a limit of 8 Tbyte for the aggregate size, thus I had to create
> two aggregates? Is this true? could not find any hint on the NOW
> site yet ...
>
> Cheers
> --pwo

--

Scott Miller
skottie [at] anim

cet1 at cus

Feb 17, 2006, 3:36 AM

Post #5 of 5 (498 views)
Permalink

Re: R100 ggregate size limited to 8 TByte? [In reply to]

jeremyw [at] al (Jeremy Webber) writes:

> IMHO NetApp need to pull out all the stops to remove the 16TB limit on
> the size of a WAFL file system. In our environment it's a killer,
> especially now we have flexvols.

This must be coming soon, surely? Why else would NetApp have changed
the disk block addreses in WAFL from 32-bit to 64-bit values? (see
the toasters thread "Moving to flexible volumes increases number of
index blocks" in July 2005)

I expect that traditional volumes will be stuck at 16TB max indefinitely.

--
Chris Thompson
Email: cet1 [at] cam

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