What is the difference between local storage (SSD,NVMe) and ceph disks for cloud servers? Print

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Servers with local disks keep all data on a local RAID mirror on the host system. They are optimized for high I/O performance and low latency and are especially suited for applications which require fast access to disks with low latency, such as databases.

Servers with ceph disks store their data on a remote filesystem. Each block is stored on three different servers. They are especially suited for higher availability needs: If the local host hardware fails, we will boot the server on a different machine.

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