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Conference Papers Year : 2022

Container-aware I/O stack: bridging the gap between container storage drivers and solid state devices

Abstract

Solid State Devices (SSDs) have been widely adopted in con- tainerized cloud platforms as they provide parallel and high- speed data accesses for critical data-intensive applications. Unfortunately, the I/O stack of the physical host overlooks the layered and independent nature of containers, thus I/O operations require expensive file redirect (between the stor- age driver, Overlay2/EXT4, and the virtual file system, VFS) and are scheduled sequentially. Moreover, containers suffer from significant I/O contention as resources at the native file system are shared between them. This paper presents a Container-aware I/O stack (CAST). CAST is made up of Layer-aware VFS (LaVFS) and Container-aware Native File System (CaFS). LaVFS locates files based on layer information and enables simultaneous Copy-on-Write (CoW) operations and thus avoids the overhead of searching and modifying files. CaFS, on the other hand, provides contention-free ac- cess by designing fine-grain resource allocation at the native file system. Experimental results using a NVMe SSD with micro-benchmarks and real-world applications show that CAST achieves 216%-219% (38%-98%, respectively) improve- ment over the original I/O stack.
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Dates and versions

hal-03890424 , version 1 (08-12-2022)

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Song Wu, Zhuo Huang, Pengfei Chen, Hao Fan, Shadi Ibrahim, et al.. Container-aware I/O stack: bridging the gap between container storage drivers and solid state devices. VEE '22 - 18th ACM SIGPLAN/SIGOPS International Conference on Virtual Execution Environments, Mar 2022, Virtual, Swaziland. pp.18-30, ⟨10.1145/3516807.3516818⟩. ⟨hal-03890424⟩
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