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Why 100 is the recommended minimum partitions per drive in openstack swift?

asked 2014-05-13 22:13:30 -0500

anonymous user

Anonymous

As per the deployment guide http://docs.openstack.org/developer/swift/deployment_guide.html (http://docs.openstack.org/developer/s...) , there should be a minimum of 100 partitions per drive. My question is why this number was chosen? Was any study done to derive this number? Can someone provide a good analysis?

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answered 2014-06-13 15:01:30 -0500

zaitcev gravatar image

The 100 factor is mostly SwiftStack and RAX experience. The more you have, the smoother is the ramp-up of replication when devices are added. A partition is the main unit of replication, which is why it's significant. Of course it's possible to have too many, in which case you're mostly storing empty directories.

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Asked: 2014-05-13 22:13:30 -0500

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Last updated: Jun 13 '14