This sounds like expected behavior with 3 storage nodes. In order for a write to successfully complete, it must be written to a quorum of storage devices. In the case of 3 replicas, the quorum is 2. By writing to two drives, Swift is providing some guarantees about the durability and availability of the data. A single copy is not durable, so a write to only a single drive will never return success to the client.
This means that you need at least 2 drives available in order to write to a 3 replica policy. --John On 13 Feb 2018, at 3:21, aRaviNd wrote: > Hi All, > > We have configured swift with one proxy and three storage nodes. Our setup > contain two regions and three zones. > > > > When two nodes goes down we are not able to upload any files but download > and read is working fine. Is there any requirement for minimum no of > storage nodes required for write to work? > > Aravind M D > _______________________________________________ > Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : openstack@lists.openstack.org > Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
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