[DRBD-user] Max disk size with external metadata (8.4.11-1)

[Lars Ellenberg]

On Wed, Sep 12, 2018 at 10:51:10PM +0100, Trevor Hemsley wrote:
> On 12/09/18 21:33, Christiaan den Besten wrote:
> > So don’t think 8.4.11 should be limited to 4Tb to you ! 
> 
> The key bit is "external metadata" which is indeed limited in size to a
> 128MB slot that allows for devices up to 4TB in size.
>
> DRBD9 might be different.

In 8.4, there is still "indexed" external metadata and
"flexible" external metadata.
You should only ever use the "flex" flavor.

The flex flavor can take the whole device,
whatever you make available.

I'm not exactly sure,
but I sure hope we have dropped the "indexed" flavor in DBRD 9.

Depending on the number of (max-) peers,
DRBD 9 needs more room for metadata than a "two-node only" DRBD.

-- 
: Lars Ellenberg
: LINBIT | Keeping the Digital World Running
: DRBD -- Heartbeat -- Corosync -- Pacemaker

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