IBM Storage Ceph vs. IBM System Storage DS8900F

It is absolutely, hands down the best storage solution for Open Stack. I would even argue it is the only solution if a company is operating at petabyte scale and need resiliency. The storage solution allows any organization to scale their environment using commodity hardware from top to bottom. It has a battle tested track record where it is even being used as the data storage back end for the Large Hadron Collider at Cern

Incentivized

It's a qualified 10. If it's a mainframe environment I wouldn't think twice. An open systems environment I would ask many questions to make sure that it's not going to be a bad decision. The open systems environments would need to have requirements to drive the DS8000. It would work for any environment in the interop matrix, but I'd just want to make sure that it's the right fit.

Incentivized

• Highly resilient, almost every time we attempted to destroy the cluster it was able to recover from a failure. It struggled to when the nodes where down to about 30%(3 replicas on 10 nodes)
• The cache tiering feature of Ceph is especially nice. We attached solid state disks and assigned them as the cache tier. Our sio benchmarks beat the our Netapp when we benchmarked it years ago (no traffic, clean disks) by a very wide margin.
• Ceph effectively allows the admin to control the entire stack from top to bottom instead of being tied to any one storage vendor. The cluster can be decentralized and replicated across data centers if necessary although we didn't try that feature ourselves, it gave us some ideas for a disaster recovery solution. We really liked the idea that since we control the hardware and the software, we have infinite upgradability with off the shelf parts which is exactly what it was built for.

Incentivized

• Allows us to use GDPS for our disaster recovery solution. This is a strength because it enables us to meet our DR requirements.
• Allows us to have encryption of our data at rest. This is a strength because it enables us to meet our security requirements.
• Allows us to have a stable and reliable disk storage. This is a strength because it enables us to meet our data availability requirements.

Incentivized

• Authorization on object level could be improved
• Helper libraries to access Red Hat Ceph Storage from various languages could be improved
• Ability to attach structured metadata to stored objects could be improved

Incentivized

• I have seen the GUI say that the storage facility is inaccessible, even when getting a clean health check from IBM. Typically rebooting the HMC fixes this.
• When decommissioning a box, you cannot delete arrays until ranks are done formatting. This adds a lot of time to the decomm process
• IO ports do not have a topology by default

Incentivized

VSAN (Virtual SAN) and Ceph are both software-defined storage solutions, but they have some key differences in terms of their architecture and capabilities.VSAN is a software-defined storage solution that is built into the VMware vSphere hypervisor. It allows organizations to create a shared storage pool using locally attached storage on multiple ESXi hosts. VSAN is designed to be highly available, and it can automatically detect and recover from hardware failures.Ceph, on the other hand, is an open-source software-defined storage solution that can run on a variety of different hardware and virtualization platforms. It provides object, block, and file storage in a single platform, and is designed to be highly scalable and highly available. Ceph is also known for its ability to handle large amounts of data, and it can be integrated with a wide variety of different applications and services.In terms of functionality, VSAN is more suited for virtualized environments, as it is built into vSphere and it is designed to work well with vSphere's other features such as vMotion and DRS. Ceph on the other hand provides more flexibility as it can run on multiple platforms and it can handle more types of storage like object, block and file storage.I

Incentivized

Other vendors lack many of the mainframe functions provided by DS8k. SInce IBM is the most prominent maninframe vendor support is unmatched.

Incentivized

• Cost saving in terms of capex (you can reduce EMC & NetApp like dependency)
• One time setup & then easy provisioning of storage
• Requirement of competent engineers for maintenence

Incentivized

• The DS8000 helps my customers meet their overall business objectives by providing a bulletproof platform for the most critical enterprise environments

Incentivized