storage_system

Storage System

Technical Requirements for C++ Storage System Developer

Core Skills

C++ Programming

• Modern C++ (C++11/14/17/20) features
• Zero-copy I/O and DMA
• Async I/O (io_uring, libaio)
• Memory-mapped files
• SIMD optimization for data processing

File Systems

• File system fundamentals (inode, dentry, superblock)
• POSIX file operations
• Direct I/O and buffered I/O
• Sparse files and hole punching
• File locking mechanisms

Block Storage

• Block device interfaces
• iSCSI and NVMe protocols
• RAID configurations and algorithms
• Erasure coding (Reed-Solomon)
• Thin provisioning and snapshots

Object Storage

• S3-compatible API implementation
• Consistent hashing for data placement
• Multi-part upload and resumable transfers
• Metadata management
• Lifecycle management

Distributed Storage

• Distributed file systems (HDFS, Ceph, GlusterFS)
• Data locality and rack awareness
• Replication strategies
• Data consistency models
• CAP theorem applications

Tools & Technologies

Storage Technologies

• Ceph (RADOS, RBD, CephFS)
• MinIO (object storage)
• SPDK (Storage Performance Development Kit)
• DPDK for network acceleration
• io_uring for async I/O

Data Structures

• Log-Structured Merge Tree (LSM)
• B-trees and B+ trees
• Skip lists
• Merkle trees for data integrity
• Content-defined chunking (CDC)

Networking

• RDMA (Remote Direct Memory Access)
• InfiniBand verbs
• RoCE (RDMA over Converged Ethernet)
• NVMe-oF (NVMe over Fabrics)

Domain Knowledge

• Storage performance metrics (IOPS, throughput, latency)
• Data durability and reliability
• Backup and disaster recovery
• Data deduplication and compression
• Storage tiering (SSD, HDD, tape)
• Power-loss protection and journaling
• Data integrity (checksums, scrubbing)