Cephvs
MinIO
MinIO: Far simpler to operate if you only need an S3 endpoint and not block or file storage
Ceph
Open source distributed storage providing object, block and file from one cluster
As of 31 August 2026, Ceph is free to use. One cluster that serves S3 objects, block devices and a POSIX filesystem from the same pool of disks, with no single point of failure and no licence fee. Softwr lists it under File Storage. Ceph is made by Ceph Foundation (Linux Foundation), available on Linux.
Overview
What Ceph does
Ceph is an open source distributed storage system built on RADOS, a self healing object store that places data by algorithm rather than by lookup table. On top of it sit three interfaces: RADOS Gateway for S3 and Swift object access, RBD for block devices used by OpenStack and Proxmox, and CephFS for a POSIX filesystem. It is governed by the Ceph Foundation under the Linux Foundation, with IBM as the largest contributor following its acquisition of Red Hat. The reason to choose it is that it is the only mature open system that serves all three storage types from one pool. A platform team can back virtual machine disks, a shared filesystem and an S3 endpoint with the same hardware and one operational skill set, and grow it by adding nodes rather than by buying the next array. Commercially that means no per terabyte licence and no vendor lock on the hardware, which is why it underpins so much of the OpenStack and research computing world. Buyers are organisations with a platform team and a multi petabyte horizon: universities, telecoms, hosting providers and anyone running private cloud at scale. The trade-off is staffing. Ceph rewards operators who understand placement groups, CRUSH maps, recovery throttling and upgrade ordering, and it punishes those who do not with recovery storms that make the whole cluster slow at exactly the moment something has already failed.
What people use it for
- Backing a private cloud where virtual machine disks, shared filesystems and an S3 endpoint all need the same hardware
- Growing past the point where a proprietary array upgrade costs more than a rack of commodity servers
- Research and media environments with petabytes of data and staff who can operate storage
- Providing an S3 endpoint on premises with multi site replication under your own control
Related searches
The honest half
Where it falls short
Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Ceph.
- Ceph assumes an operator who understands placement groups, CRUSH rules and recovery tuning, so organisations without dedicated storage staff routinely end up with a cluster that works until the first failure and then does not.
- Small clusters are inefficient: three way replication means a third of raw capacity is usable, and erasure coding needs enough failure domains to be safe, so the economics only work above a certain size.
- Recovery and rebalancing generate heavy internal traffic, so a failed disk can degrade client latency across the cluster unless backfill is throttled correctly beforehand.
- Upgrades must follow a strict daemon order across monitors, managers, OSDs and gateways, and a mistake in that order on a live cluster is difficult to reverse.
- Because it is self hosted, every byte served to the internet is transit you pay for on your own links, so the free licence does not mean free egress and bandwidth planning becomes your problem rather than the providers.
Cross-shopped
What people choose instead of Ceph
Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.
- CephvsProxmox VE
Proxmox VE: Bundles Ceph with a hypervisor and a management UI, which removes much of the initial setup work
- CephvsBackblaze
Backblaze: If the aim was cheap durable object storage rather than a private platform, a managed bucket avoids the staffing cost entirely
Pricing
What Ceph costs
Taken from the vendor's own pricing page. Prices move, so check before you buy.
Ceph
Free
- Full functionality, no capacity limit
- Object, block and file interfaces
- Community support via mailing list and Slack
- Vendor supported builds available separately from IBM and SUSE
Capabilities
Features
RADOS object store
Self healing, self managing distributed object layer underneath every interface
RADOS Gateway
S3 and Swift compatible object access with multi site replication
RBD block devices
Thin provisioned block volumes with snapshots for virtual machines and containers
CephFS
A POSIX filesystem with a scalable metadata server tier
CRUSH placement
Algorithmic data placement across failure domains without a central metadata lookup
Erasure coded pools
Reduces raw capacity overhead compared with three way replication on cold data
Answered, with sources
Questions people ask
Each answer names the page it came from, so you can check it rather than take our word for it.
How many nodes do I need to start?
Three is the practical minimum for a replicated cluster with real fault tolerance, and most production advice starts at five once you account for maintenance windows.
Is it faster than a SAN?
Not on single stream latency. It wins on aggregate throughput and on growing without a forklift upgrade, which is a different property from raw speed.
Can I buy support?
Yes. IBM sells IBM Storage Ceph and SUSE and others have offered supported builds; the upstream project itself is free.
Should I use it just for S3?
If object is all you need, a dedicated object store is simpler to run. Ceph earns its complexity when you need block and file as well.
Keep looking
Where to go from Ceph
- Ceph alternativesEvery product people weigh against it
- Ceph pricingPlans, floors and what the tiers exclude
- Ceph badgesWhich rules it meets, and the figure behind each
- All File Storage softwareThe full category
- Best File Storage softwareThe shortlist, and how it was cut
Best File Storage software for
Compare Ceph with
- MinIO
- Panzura
- Scality RING
- VAST Data
- Backblaze
- Duplicati
- Storj
- Tigris
- Cloudflare R2
- Cloudian
- IDrive e2
- TrueNAS
- LucidLink
- pCloud
- Sync.com
- Panzura
- Scality RING
- Storj
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Softwr does not host reviews and shows no star rating for Ceph, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.
More on Ceph
Ceph alternatives
What people switch to, and what they give up
Ceph pricing
Every tier, and where the cost actually lands
Compare Ceph
Put it head to head with anything we hold
Ceph badge
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