But the shared, yet exclusive, nature of EBS access leads to problems, particularly when ops teams try to build stateful persistence into a container cluster.

Like enterprise SAN volumes, EBS data is persistent, and any instance can use the data. But each volume can only attach to a single Elastic Compute Cloud (EC2) instance at a time. When a server attaches to a volume, it acts as local block storage that IT professionals can use just like a local disk for databases or other applications.ĪWS automatically replicates EBS data to provide high availability, and users can make volume snapshot copies without unmounting the disk. EBS storage volumes are conceptually identical to those on an enterprise array that are available to servers over a SAN.

Storage network in the cloudĪWS users complain about a number of Amazon EBS performance issues, and the reasons derive from the nature and delivery of the EBS resource itself, which is effectively a giant, shared storage area network (SAN). Let's examine these causes and provide some troubleshooting advice. That creates a perception that EBS has more glitches than other native cloud services. While AWS uses multiple levels of redundancy and software automation to protect systems and data, some services tie more closely to individual pieces of equipment than others.ĮBS is one of those services, which means its users notice equipment failures more often. AWS resources seem to instantaneously appear at the click of a button, but ultimately, hardware provides these virtual resources. But Amazon EBS performance might be more prone to disruptions than more abstracted AWS offerings.Īmazon EBS typically measures top performance as either throughput or IOPS, but volumes can't perform if they run into problems. Require direct access to storage volumes for databases and other transactional applications.

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