On 01/14/2014 10:42 PM, Sage Weil wrote:
> This is a big release, with lots of infrastructure going in for
> firefly.  The big items include a prototype standalone frontend for
> radosgw (which does not require apache or fastcgi), tracking for read
> activity on the osds (to inform tiering decisions), preliminary cache
> pool support (no snapshots yet), and lots of bug fixes and other work
> across the tree to get ready for the next batch of erasure coding
> patches.

...

> * The default CRUSH rules and layouts are now using the latest and
>   greatest tunables and defaults.  Clusters using the old values will
>   now present with a health WARN state.  This can be disabled by
>   adding 'mon warn on legacy crush tunables = false' to ceph.conf.

So for upgraded clusters how does one partake in those latest and
greatest tunables & defaults?

/pm
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