Thanks for the info! Regards,
Leander On Thu, Jan 3, 2013 at 7:08 PM, Samuel Merritt <s...@swiftstack.com> wrote: > On 1/3/13 7:07 AM, Leander Bessa Beernaert wrote: > >> Hello all, >> >> Could some please confirm my analysis of the ring creation in swift? >> >> I need to run a few benchmarks on a set of data (200GB) total and need >> it to be replicated at least 3 times. >> >> From the Swift docs [1], I understood that the command below create the >> >> ring for a partition sized 2^18 and 3 replicas. >> >> swift-ring-builder account.builder create 18 3 1 >> # swift-ring-builder container.builder create 18 3 1 >> # swift-ring-builder object.builder create 18 3 1 >> >> Now, in my case i should use the values 28 3 1 right, or should i factor >> in the replication and instead use 30 3 1? >> > > Neither one. The partitions in the Swift ring are subsets of the range of > a hash function; they don't have anything to do with the number of bytes of > storage in your cluster. > > General rule of thumb is to figure out how many drives your cluster will > ever have at its largest, and then choose the smallest part_power that > gives you ~100 partitions per drive. > > > I have at the moment 1 proxy node and 5 storage nodes with a 200GB >> storage partition. This won't be enough to accomodate everything right? >> > > I don't see why not. You've got 200GB stored data * 3 replicas = 600GB raw > data used, and you've got 1000GB of disk. Even with a little bit of > overhead for accounts and containers, that's still plenty of disk. > > > > ______________________________**_________________ > Mailing list: > https://launchpad.net/~**openstack<https://launchpad.net/~openstack> > Post to : openstack@lists.launchpad.net > Unsubscribe : > https://launchpad.net/~**openstack<https://launchpad.net/~openstack> > More help : > https://help.launchpad.net/**ListHelp<https://help.launchpad.net/ListHelp> >
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